HomeMy WebLinkAboutCT 2018-0002; AVIARA APARTMENTS; STORMWATER POLLUTION PREVENTION PLAN; 2022-04-29STORMWATER POLLUTION PREVENTION
PLAN
for
AVIARA WEST / LAUREL TREE LANE WIDENING
RISK LEVEL 2
WASTE DISCHARGE IDENTIFICATION NUMBER (WDID):
_____________
Legally Responsible Person (LRP):
Aviara LP
3444 Camino Del Rio N. #202
San Diego, CA 92108
Approved Signatory:
Dennis Szuberla
3444 Camino Del Rio N. #202
San Diego, CA 92108
858-535-1475
Prepared for:
Aviara LP
3444 Camino Del Rio N. #202
San Diego, CA 92108
Project Address:
1205 Aviara Parkway
Carlsbad, CA 92011
SWPPP Prepared by:
SB&O Inc.
3990 Ruffin Road # 120
San Diego, CA 92123
Allen Butcher
SWPPP Preparation Date
April 29, 2021
Estimated Project Dates:
Start of
Construction
September 1,
2022
Completion of
Construction
September 1,
2025
CASQA SWPPP Template i December 2019
Table of Contents
Table of Contents .................................................................................................... i
Qualified SWPPP Developer ................................................................................... 1
Legally Responsible Person ................................................................................... 2
Amendment Log .................................................................................................... 3
Section 1 SWPPP Requirements .................................................................... 4
1.1 Introduction ........................................................................................................................ 4
1.2 Permit Registration Documents ..................................................................................... 4
1.3 SWPPP Availability and Implementation ....................................................................... 5
1.4 SWPPP Amendments...................................................................................................... 5
1.5 Retention of Records ...................................................................................................... 6
1.6 Required Non-Compliance Reporting ............................................................................ 6
1.7 Annual Report ................................................................................................................. 6
1.8 Changes to Permit Coverage ............................................................................................7
1.9 Notice of Termination ......................................................................................................7
Section 2 Project Information ........................................................................ 8
2.1 Project and Site Description ........................................................................................... 8
2.1.1 Site Description ........................................................................................................... 8
2.1.2 Existing Conditions ..................................................................................................... 8
2.1.3 Existing Drainage........................................................................................................ 8
2.1.4 Geology and Groundwater .......................................................................................... 8
2.1.5 Project Description ..................................................................................................... 9
2.1.6 Developed Condition .................................................................................................. 9
2.2 Permits and Governing Documents ...............................................................................10
2.3 Stormwater Run-On from Offsite Areas ........................................................................10
2.4 Findings of the Construction Site Sediment and Receiving Water Risk Determination
10
2.5 Construction Schedule ................................................................................................... 12
2.6 Potential Construction Activity and Pollutant Sources ................................................. 12
2.7 Identification of Non-Stormwater Discharges .............................................................. 12
2.8 Required Site Map Information ..................................................................................... 13
Section 3 Best Management Practices ........................................................... 15
3.1 Schedule for BMP Implementation ............................................................................... 15
3.2 Erosion and Sediment Control ...................................................................................... 16
3.2.1 Erosion Control ......................................................................................................... 20
3.2.2 Sediment Controls .................................................................................................... 22
3.3 Non-Stormwater Controls and Waste and Materials Management ............................. 24
3.3.1 Non-Stormwater Controls ........................................................................................ 26
3.3.2 Materials Management and Waste Management ..................................................... 28
3.4 Post construction Stormwater Management Measures ............................................... 30
Section 4 BMP Inspection, Maintenance Rain Event Action Plans ................ 31
4.1 BMP Inspection and Maintenance ................................................................................ 31
4.2 Rain Event Action Plans ................................................................................................ 31
Section 5 Training ........................................................................................ 33
Section 6 Responsible Parties and Operators............................................... 34
6.1 Responsible Parties ....................................................................................................... 34
6.2 Contractor List .............................................................................................................. 35
Section 7 Construction Site Monitoring Program ........................................ 36
7.1 Purpose ......................................................................................................................... 36
7.2 Applicability of Permit Requirements .......................................................................... 36
7.3. Weather and Rain Event Tracking ................................................................................ 36
CASQA SWPPP Template ii December 2019
7.3.1 Weather Tracking ..................................................................................................... 36
7.3.2 Rain Gauges .............................................................................................................. 36
7.4 Monitoring Locations ................................................................................................... 37
7.5 Safety and Monitoring Exemptions .............................................................................. 37
7.6 Visual Monitoring ......................................................................................................... 38
7.6.1 Routine Observations and Inspections ..................................................................... 38
7.6.1.1 Routine BMP Inspections ................................................................................. 38
7.6.1.2 Non-Stormwater Discharge Observations ........................................................ 38
7.6.2 Rain-Event Triggered Observations and Inspections............................................... 38
7.6.2.1 Visual Observations Prior to a Forecasted Qualifying Rain Event ................... 39
7.6.2.2 BMP Inspections During an Extended Storm Event ........................................ 39
7.6.2.3 Visual Observations Following a Qualifying Rain Event .................................. 39
7.6.3 Visual Monitoring Procedures .................................................................................. 40
7.6.4 Visual Monitoring Follow-Up and Reporting ........................................................... 40
7.6.5 Visual Monitoring Locations .................................................................................... 40
7.7 Water Quality Sampling and Analysis .......................................................................... 44
7.7.1 Sampling and Analysis Plan for Non-Visible Pollutants in Stormwater Runoff
Discharges ............................................................................................................................. 44
7.7.1.1 Sampling Schedule ............................................................................................ 46
7.7.1.2 Sampling Locations .......................................................................................... 47
7.7.1.3 Monitoring Preparation .................................................................................... 52
7.7.1.4 Analytical Constituents ..................................................................................... 53
7.7.1.5 Sample Collection ............................................................................................. 55
7.7.1.6 Sample Analysis ................................................................................................ 55
7.7.1.7 Data Evaluation and Reporting ........................................................................ 56
7.7.2 Sampling and Analysis Plan for pH and Turbidity in Stormwater Runoff Discharges
58
7.7.2.1 Sampling Schedule ............................................................................................ 58
7.7.2.2 Sampling Locations .......................................................................................... 58
7.7.2.3 Monitoring Preparation .................................................................................... 59
7.7.2.4 Field Parameters ............................................................................................... 60
7.7.2.5 Sample Collection ............................................................................................. 60
7.7.2.6 Field Measurements .......................................................................................... 61
7.7.2.7 Data Evaluation and Reporting ......................................................................... 61
7.7.3 Sampling and Analysis Plan for pH, Turbidity, and SSC in Receiving Water .......... 62
7.7.4 Sampling and Analysis Plan for Non-Stormwater Discharges ................................. 62
7.7.4.1 Sampling Schedule ............................................................................................ 63
7.7.4.2 Sampling Locations .......................................................................................... 63
7.7.4.3 Monitoring Preparation .................................................................................... 65
7.7.4.4 Analytical Constituents ..................................................................................... 65
7.7.4.5 Sample Collection ............................................................................................. 66
7.7.4.6 Sample Analysis ................................................................................................ 66
7.7.4.7 Data Evaluation and Reporting ........................................................................ 66
7.7.5 Sampling and Analysis Plan for Other Pollutants Required by the Regional Water
Board 69
7.7.6 Training of Sampling Personnel ............................................................................... 69
7.7.7 Sample Collection and Handling .............................................................................. 69
7.7.7.1 Sample Collection ............................................................................................. 69
7.7.7.2 Sample Handling .............................................................................................. 70
7.7.7.3 Sample Documentation Procedures ................................................................. 70
7.8 Active Treatment System Monitoring............................................................................ 71
CASQA SWPPP Template iii December 2019
7.9 Bioassessment Monitoring ............................................................................................ 71
7.10 Watershed Monitoring Option ...................................................................................... 71
7.11 Quality Assurance and Quality Control ......................................................................... 71
7.11.1 Field Logs ............................................................................................................... 71
7.11.2 Clean Sampling Techniques ................................................................................... 71
7.11.3 Chain of Custody ................................................................................................... 72
7.11.4 QA/QC Samples .................................................................................................... 72
7.11.4.1 Field Duplicates ................................................................................................ 72
7.11.4.2 Equipment Blanks ............................................................................................ 72
7.11.4.3 Field Blanks ...................................................................................................... 72
7.11.4.4 Travel Blanks .................................................................................................... 72
7.11.5 Data Verification ................................................................................................... 72
7.12 Records Retention ........................................................................................................ 73
Section 8 References ..................................................................................... 75
Appendix A: Construction General Permit ......................................................... 76
Appendix B: Site Maps ....................................................................................... 77
Appendix C: Permit Registration Documents .................................................... 78
Appendix D: SWPPP Amendment Certifications ................................................ 79
Appendix E: Submitted Changes to PRDs .......................................................... 81
Appendix F: Construction Schedule ................................................................. 83
Appendix G: Construction Activities, Materials Used, and Associated Pollutants 84
Appendix H: CASQA Stormwater BMP Handbook Portal: Construction Fact Sheets
87
Appendix I: BMP Inspection Form ................................................................... 88
Appendix J: Project Specific Rain Event Action Plan Template .........................95
Appendix K: Training Reporting Form ............................................................. 99
Appendix L: Responsible Parties ..................................................................... 101
Appendix M: Contractors and Subcontractors .................................................... 103
Appendix N: Calculations .................................................................................... 105
Appendix O: Weather reports ............................................................................. 106
Appendix P: Monitoring Records ........................................................................ 107
Appendix Q: Example Storm Event Monitoring Forms ....................................... 108
Appendix R: Field Meter Instructions ................................................................. 115
Appendix S: Supplemental Information ......................................................... 116
CASQA SWPPP Template 3 December 2019
Amendment Log
Project Name: AVIARA WEST / LAUREL TREE LANE WIDENING
Project Number/ID 546240
Amendment
No. Date Brief Description of Amendment,
include section and page number
Prepared and
Approved By
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
CASQA SWPPP Template 4 December 2019
Section 1 SWPPP Requirements
1.1 INTRODUCTION
The Aviara West / Laurel Tree Lane street widening project is a redevelopment project with a
multi-residential building replacing active flower and produce packaging and wholesale
operation, which includes a 38,000-square-foot warehouse on the site. Development plans
include a residential structure including a parking structure. The offsite disturbance includes
the widening of the north side of Laurel Tree Lane and the lengthening of the southbound left
turn pocket on Aviara parkway. The total disturbed area is 5.479 acres at Aviara West
Apartments project and 0.465 acres for the widening project (total disturbed area is 5.944 acres)
This Stormwater Pollution Prevention Plan (SWPPP) is designed to comply with California’s
General Permit for Stormwater Discharges Associated with Construction and Land Disturbance
Activities (General Permit) Order No. 2009-0009-DWQ (as amended by 2010-0014-DWQ and
2012-006-DWQ) (NPDES No. CAS000002) issued by the State Water Resources Control Board
(State Water Board) Appendix A. This SWPPP has been prepared following the SWPPP
Template provided on the California Stormwater Quality Association Stormwater Best
Management Practice Handbook: Construction (CASQA 2019). In accordance with the General
Permit, Section XIV, this SWPPP is designed to address the following:
· Pollutants and their sources, including sources of sediment associated with construction,
construction site erosion, and other activities associated with construction activity are
controlled;
· Where not otherwise required to be under a Regional Water Quality Control Board
(Regional Water Board) permit, all non-stormwater discharges are identified and either
eliminated, controlled, or treated;
· Site BMPs are effective and result in the reduction or elimination of pollutants in
stormwater discharges and authorized non-stormwater discharges from construction
activity to the Best Available Technology/Best Control Technology (BAT/BCT) standard;
· Calculations and design details, as well as BMP controls, are complete and correct.
1.2 PERMIT REGISTRATION DOCUMENTS
Required Permit Registration Documents (PRDs) shall be submitted to the State Water Board
via the Stormwater Multi Application and Report Tracking System (SMARTS) by the Legally
Responsible Person (LRP) or authorized personnel (i.e., Approved Signatory) under the
direction of the LRP. The project-specific PRDs include:
1. Notice of Intent (NOI);
2. Risk Assessment (Construction Site Sediment and Receiving Water Risk Determination);
3. Site Map;
4. Annual Fee;
5. Signed Certification Statement (LRP Certification is provided electronically with
SMARTS PRD submittal); and
6. SWPPP.
Site Maps can be found in Appendix B. A copy of the submitted PRDs shall also be kept in
Appendix C along with the Waste Discharge Identification (WDID) confirmation.
CASQA SWPPP Template 5 December 2019
1.3 SWPPP AVAILABILITY AND IMPLEMENTATION
The discharger shall make the SWPPP available at the construction site during working hours
(see Section 7.5 of CSMP for working hours) while construction is occurring and shall be made
available upon request by a State or Municipal inspector. When the original SWPPP is retained
by a crewmember in a construction vehicle and is not currently at the construction site, current
copies of the BMPs and map/drawing will be left with the field crew and the original SWPPP
shall be made available via request by radio/telephone. (CGP Section XIV.C)
The SWPPP shall be implemented concurrently with the start of ground disturbing activities.
1.4 SWPPP AMENDMENTS
The SWPPP should be revised when:
· If there is a General Permit violation.
· There is a reduction or increase in total disturbed acreage (General Permit Section II
Part C).
· BMPs do not meet the objectives of reducing or eliminating pollutants in stormwater
discharges.
Additionally, the SWPPP shall be amended when:
· There is a change in construction or operations which may affect the discharge of
pollutants to surface waters, groundwater(s), or a municipal separate storm sewer
system (MS4);
· There is a change in the project duration that changes the project’s risk level; or
· When deemed necessary by the QSD. The QSD has determined that the changes listed in
Table 1.1 can be field determined by the QSP. All other changes shall be made by the
QSD as formal amendments to the SWPPP.
The following items shall be included in each amendment:
· Who requested the amendment;
· The location of proposed change;
· The reason for change;
· The original BMP proposed, if any; and
· The new BMP proposed.
Amendment shall be logged at the front of the SWPPP and certification kept in Appendix D. The
SWPPP text shall be revised replaced and/or hand annotated as necessary to properly convey
the amendment. SWPPP amendments must be made by a QSD. The following changes have
been designated by the QSD as “to be field determined” and constitute minor changes that the
QSP may implement based on field conditions.
Table 1.1 List of Changes to be Field Determined
Candidate changes for field location or
determination by QSP (1)
Check changes that can be field
located or field determined by
QSP
Increase quantity of an Erosion or Sediment
Control Measure
Relocate/add stockpiles or stored materials
Relocate or add toilets
CASQA SWPPP Template 6 December 2019
Candidate changes for field location or
determination by QSP (1)
Check changes that can be field
located or field determined by
QSP
Relocate vehicle storage and/or fueling locations
Relocate areas for waste storage
Relocate water storage and/or water transfer
location
Changes to access points (entrance/exits)
Change type of Erosion or Sediment Control
Measure
Changes to location of erosion or sediment control
Minor changes to schedule or phases
Changes in construction materials
(1) Any field changes not identified for field location or field determination by QSP must be
approved by QSD
1.5 RETENTION OF RECORDS
Paper or electronic records of documents required by this SWPPP shall be retained for a
minimum of three years from the date generated or date submitted, whichever is later.
These records shall be available at the Site until construction is complete. Records assisting in
the determination of compliance with the General Permit shall be made available within a
reasonable time to the Regional Water Board, State Water Board, or U.S. Environmental
Protection Agency (EPA) upon request. Requests by the Regional Water Board for retention of
records for a period longer than three years shall be adhered to.
1.6 REQUIRED NON-COMPLIANCE REPORTING
If a General Permit discharge violation occurs, the QSP shall immediately notify the LRP. The
LRP shall include information on the violation with the Annual Report. Corrective measures
will be implemented immediately following identification of the discharge or written notice of
non-compliance from the Regional Water Board. Discharges and corrective actions must be
documented and include the following items:
· The date, time, location, nature of operation and type of unauthorized discharge.
· The cause or nature of the notice or order.
· The BMPs deployed before the discharge event, or prior to receiving notice or order.
· The date of deployment and type of BMPs deployed after the discharge event, or after
receiving the notice or order, including additional measures installed or planned to
reduce or prevent re-occurrence.
Reporting requirements for NALs exceedances are discussed in Section 7.7.2.7.
1.7 ANNUAL REPORT
The General Permit requires that permittees prepare, certify, and electronically submit an
Annual Report no later than September 1 of each year. Reporting requirements are identified in
CASQA SWPPP Template 7 December 2019
Section XVI of the General Permit. Annual reports will be filed in SMARTS and in accordance
with information required by the online forms.
1.8 CHANGES TO PERMIT COVERAGE
The General Permit allows for the reduction or increase of the total acreage covered under the
General Permit when:
· a portion of the project is complete and/or conditions for termination of coverage have
been met (see Section 1.9);
· when ownership of a portion of the project is purchased by a different entity; or
· when new acreage is added to the project.
· Modified PRDs shall be filed electronically within 30 days of a reduction or increase in
total disturbed area if a change in permit-covered acreage is to be sought. The SWPPP
shall be modified appropriately and shall be logged at the front of the SWPPP and
certification of SWPPP amendments are to be kept in Appendix D. Updated PRDs
submitted electronically via SMARTS can be found in Appendix E.
1.9 NOTICE OF TERMINATION
A Notice of Termination (NOT) must be submitted electronically by the LRP via SMARTS to
terminate coverage under the General Permit. According to the requirements of Section II.D.1
of the General Permit, the following method will be used to satisfy final cover requirements:
The NOT must include a final Site Map and representative photographs of the project site that
demonstrate final stabilization has been achieved. The NOT shall be submitted within 90 days
of construction completion. The Regional Water Board will consider a construction site
complete when the conditions of the General Permit, Section II.D, have been met.
CASQA SWPPP Template 8 December 2019
Section 2 Project Information
2.1 PROJECT AND SITE DESCRIPTION
2.1.1 Site Description
The AVIARA WEST / LAUREL TREE LANE WIDENING project site comprises approximately
6.34 acres and is located at 1205 Aviara Parkway, in Carlsbad, California. The project site is
located at the intersection of Aviara Parkway and Laurel Tree Lane, in the city of Carlsbad. The
project site is located south of Canyon de las Encinas River approximately 1.5 miles from the
Pacific Ocean. The project is located at 33.12171, -117.30297 and is identified on the Site Map in
Appendix B.
2.1.2 Existing Conditions
As of the initial date of this SWPPP, the project site is an irregular shaped parcel consisting of
approximately 5.9-acres. A graded building pad was constructed with ascending natural slopes
to the south and west. To the north a slope descends to Encinas Creek, and to the east an
ascending road embankment supports Aviara Parkway. The project site was previously
developed with an active flower and produce packaging and wholesale operation, which includes
a 38,000-square-foot warehouse. There are no known historic sources of contamination.
2.1.3 Existing Drainage
To the south and west of the project site are natural slopes up to a residential development. The
site grades are currently directed toward the northwest corner of the property. The warehouse,
parking lot, and driveways along the eastern property line flow overland to Encinas Creek north
of the site. There is no storm water infrastructure on the site.
Aviara Parkway drains from south to north along the project frontage with a slope of plus/minus
3.0%. There are no storm drain inlets along the property frontage.
Laurel Tree Lane is partially improved and drains easterly toward a low point near a box culvert
crossing. Surface discharge is primarily to the berm on the north side of the street, to the
asphalt spillway, finally to the watercourse in Canyon de las Encinas. The only storm water
infrastructure that exists on the north side of Laurel Tree Lane is the asphalt spillway that
connects to the water course.
The elevation of the project site ranges from 140 to 77 feet above mean sea level (msl).
Stormwater runoff from the site is considered direct discharge as defined by the State Water
Board into Encinas Creek. Existing site topography, drainage patterns, and stormwater
conveyance systems are shown on 535-1 and 535-1A.
The project discharges to Encinas Creek that is not listed for water quality impairment on the
most recent 303(d)-list.
2.1.4 Geology and Groundwater
The site is underlain by roadway fill (17 to 23 feet thick), undocumented artificial fill (10 to 12
feet thick), Holocene unconsolidated alluvial flood plain deposits, and sedimentary bedrock
belonging to the Tertiary Santiago Formation according to the Preliminary Geotechnical
Evaluation, 9.2 Acres, APN 212-040-56-00, Laurel Tree Lane at Aviara Parkway, Carlsbad, San
Diego County, California written by Geosoils, Inc (July 7, 2016). Groundwater occurs beneath
the site at approximately 21.5 feet below ground surface.
CASQA SWPPP Template 9 December 2019
2.1.5 Project Description
Aviara Apartments is a four-story apartment building with 259 dwelling units and a parking
structure. The existing site is situated in the northwest portion of San Diego County, in the City
of Carlsbad, located south of Canyon de las Encinitas River, and approximately 1.5 miles from
the beach. The site is located on the west side of Aviara Parkway.
As part of the Aviara Apartments development, the north side of Laurel Tree Lane will be
improved along the project frontage of the eastern development. The improvements extend
approximately 60 feet east of the property to match the full street improvements toward the cul-
de-sac terminus. The total additional impervious area is approximately ¼ acre over the 650 feet
total length. Additional work along Aviara Parkway is also included.
The proposed work is:
· to widen Laurel Tree Lane (a cul-de-sac) to the north including curb, gutter, and
sidewalk, landscaping, and provide a driveway cut to the future Aviara East Apartments.
The improvements on the north side of Laurel Tree Lane begin at the intersection of
Aviara parkway and will extend approximately 600 feet to the east.
· to provide new ADA compliant ped ramps at both the northwest and northeast curb
returns of Laurel Tree Lane and Aviara Parkway.
· to provide a new driveway entrance to the Aviara West Apartments.
· to extend the south bound left turn lane pocket another 200 feet.
Project grading will occur on approximately 6.337 acres of the project, which comprises
approximately 69 percent of the total area. The limits of grading are shown on 535-1 and 535-1A
in Appendix B. Grading will include both cut and fill activities, with the total graded material
estimated to be 34,442 cubic yards. Approximately 28,335 cubic yards of fill material will be
imported during grading activities. Graded materials are expected to be balanced onsite. Soil
will be stockpiled as shown on the wall map in Appendix B. Construction activities will not be
phased.
2.1.6 Developed Condition
Post-construction surface drainage will be directed to three (3) biofiltration basins for
treatment. The basins will be directed to the underground flow control structure (HMP &
Detention), which will discharge to the northwest corner of the property to the creek. Runoff
from the hillsides surrounding the project will be collected by a bypass system and directed to
the creek. This is the existing natural flow of surface runoff.
Laurel Tree Lane drainage is urban runoff from paved streets to concentrated flow towards the
east. There is an existing asphalt spillway located just west of the large box culvert that runs
under Laurel Tree Lane from southeast to the northwest. The spillway runs slightly parallel to
the road towards the box culvert where it flows into Canyon de las Encinas at the end of the
Laurel Tree Lane cul-de-sac.
Post-construction drainage patterns and conveyance systems are presented on 535-1 and 535-1A
in Appendix B.
CASQA SWPPP Template 10 December 2019
Table 2.1 Construction Site Estimates
Construction site area 6.337 acres
Percent impervious before construction 65 %
Runoff coefficient before construction 0.8
Percent impervious after construction 95 %
Runoff coefficient after construction 0.8
2.2 PERMITS AND GOVERNING DOCUMENTS
In addition to the General Permit, the following documents have been taken into account while
preparing this SWPPP:
· Regional Water Board requirements
· Basin Plan requirements
· Grading Permits and City of Carlsbad development requirements
2.3 STORMWATER RUN-ON FROM OFFSITE AREAS
Run-on towards the site is generated by the properties located south and west of the project. A
bypass storm drain system will be constructed to intercept stormwater along the southerly and
westerly boundaries. It will be routed through the project to the northeasterly corner of the site.
The stormwater runon drainage area contributing to the proposed bypass storm drain system is
estimated to be approximately 6.6 acres. The anticipated runoff coefficients range from 0.20 to
0.80. The anticipated off-site run-on to the proposed bypass storm drain system is estimated to
be 12.15 cfs; calculations are included in Appendix N.
The General Permit requires that temporary BMPs be implemented to direct offsite run-on away
from disturbed areas through the use of runoff controls. The following BMPs will be
implemented: silt fence, fiber rolls, and hydro seeding. These BMPs will be located along
daylight line. The off-site drainage areas and associated stormwater conveyance facilities or
BMPs are shown on the site map in Appendix B.
2.4 FINDINGS OF THE CONSTRUCTION SITE SEDIMENT AND RECEIVING
WATER RISK DETERMINATION
A construction site risk assessment has been performed for the project and the resultant risk
level is Risk Level 2
The risk level was determined using the Revised Universal Soil Loss Equation (RUSLE), a model
developed by the US Department of Agriculture (USDA) and is utilized by the US EPA for
estimating rates of soil loss at construction sites during rain events. The risk level is based on
project duration, location, proximity to impaired receiving waters, and soil conditions. A copy of
the Risk Level determination submitted on SMARTS with the PRDs is included in Appendix C.
Table 2.2 and Table 2.3 summarize the sediment and receiving water risk factors and document
the sources of information used to derive the factors.
CASQA SWPPP Template 11 December 2019
Table 2.2 Summary of Sediment Risk
RUSLE
Factor Value Method for establishing value
R 64.38 https://lew.epa.gov/
K 0.2
https://www.waterboards.ca.gov/water_issues/programs/stormwater/docs/
constpermits/guidance/k_factor_map.pdf
LS 2.15
https://www.waterboards.ca.gov/water_issues/programs/stormwater/docs/
constpermits/guidance/ls_factor_map.pdf
Total Predicted Sediment Loss (tons/acre) 27.64
Overall Sediment Risk
Low Sediment Risk < 15 tons/ acre
Medium Sediment Risk >= 15 and < 75 tons/acre
High Sediment Risk >= 75 tons/acre
Low
Medium
High
Runoff from the project site discharges into to three (3) biofiltration basins for treatment that
discharge into Encinas Creek. The public improvements runoff is directed to the low point of
Laurel Tree Lane.
Table 2.3 Summary of Receiving Water Risk
Receiving Water
Name
303(d) Listed
for Sediment
Related
Pollutant (1)
TMDL for
Sediment Related
Pollutant (1)
Beneficial Uses of
COLD, SPAWN,
and MIGRATORY
(1)
Encinas Creek Yes No Yes No Yes No
Overall Receiving Water Risk Low
High
(1) If yes is selected for any option the Receiving Water Risk is High
Risk Level 2 sites are subject to both the narrative effluent limitations (NEL) and numeric
effluent standards. The narrative effluent limitations require stormwater discharges associated
with construction activity to minimize or prevent pollutants in stormwater and authorized non-
stormwater through the use of controls, structures, and best management practices.
Discharges from Risk Level 2 site are subject to NALs for pH and turbidity shown in Table 2-4.
This SWPPP has been prepared to address Risk Level 2 requirements (General Permit Appendix
A).
CASQA SWPPP Template 12 December 2019
Table 2.4 Numeric Action Levels (NAL)
Parameter Unit Numeric Action Level
Daily Average
pH pH units Lower NAL = 6.5
Upper NAL = 8.5
Turbidity NTU 250 NTU
2.5 CONSTRUCTION SCHEDULE
The site sediment risk was determined based on construction taking place between September 1,
2022 and September 1, 2025. Modification or extension of the schedule (start and end dates)
may affect risk determination and permit requirements. The LRP shall contact the QSD if the
schedule changes during construction to address potential impact to the SWPPP. The estimated
schedule for planned work can be found in Appendix F.
2.6 POTENTIAL CONSTRUCTION ACTIVITY AND POLLUTANT SOURCES
Appendix G includes a list of construction activities and associated materials that are
anticipated to be used onsite. These activities and associated materials will or could potentially
contribute pollutants, other than sediment, to stormwater runoff.
The anticipated activities and associated pollutants were used in Section 3 to select the Best
Management Practices for the project. Locations of anticipated pollutants and associated BMPs
are shown on the Site Map in Appendix B.
For sampling requirements for non-visible pollutants associated with construction activity,
please refer to Section 7.7.1. For a full and complete list of onsite pollutants, refer to the Safety
Data Sheets (SDS), which are retained onsite at the construction trailer.
2.7 IDENTIFICATION OF NON-STORMWATER DISCHARGES
Non-stormwater discharges consist of discharges which do not originate from precipitation
events. The General Permit provides allowances for specified non-stormwater discharges that do
not cause erosion or carry other pollutants.
Non-stormwater discharges into storm drainage systems or waterways, which are not
authorized under the General Permit and listed in the SWPPP, or authorized under a separate
NPDES permit, are prohibited.
PROHIBITED (ILLICIT) DISCHARGES.
Non-stormwater discharges into storm drainage systems or waterways, which are not
authorized under the General Permit or authorized under a separate NPDES permit, are
prohibited. Examples of prohibited discharges common to construction activities include but
are not limited to:
□ Vehicle and equipment cleaning, fueling and maintenance operations;
□ Vehicle and equipment wash water, including concrete washout water;
CASQA SWPPP Template 13 December 2019
□ Slurries from concrete cutting and coring operations, PCC grinding or AC grinding
operations;
□ Slurries from concrete or mortar mixing operations;
□ Slurries from drilling or boring operations;
□ Blast residue from high-pressure washing of structures or surfaces;
□ Wash water from cleaning painting equipment;
□ Runoff from dust control applications of water or dust palliatives;
□ Sanitary and septic wastes;
□ Chemical leaks and/or spills of any kind including but not limited to petroleum, paints,
cure compounds, etc.
Non-stormwater discharges that are authorized from this project site include the following:
· irrigation of vegetative erosion control measures
· water for dust control
· dechlorinated potable water sources.
These authorized non-stormwater discharges will be managed with the stormwater and non-
stormwater BMPs described in Section 3 of this SWPPP and will be minimized by the QSP.
Activities at this site that may result in unauthorized non-stormwater discharges include:
· Fire hydrant flushing, pipe flushing and testing.
Steps will be taken, including the implementation of appropriate BMPs, to ensure that
unauthorized discharges are eliminated, controlled, disposed, or treated on-site.
Discharges of construction materials and wastes, such as fuel or paint, resulting from dumping,
spills, or direct contact with rainwater or stormwater runoff, are also prohibited.
2.8 REQUIRED SITE MAP INFORMATION
Table 2.5 Required Map Information
Included on
Map/Plan
Sheet No. (1)
Required Element
535-1 & 535-1A The project’s surrounding area (vicinity)
Map Site layout
Map Construction site boundaries
Map Drainage areas
Map Discharge locations
Map Sampling locations
Map Areas of soil disturbance (temporary or permanent)
CASQA SWPPP Template 14 December 2019
Included on
Map/Plan
Sheet No. (1)
Required Element
Map Active areas of soil disturbance (cut or fill)
Map Locations of runoff BMPs
Map Locations of erosion control BMPs
Map Locations of sediment control BMPs
N/A ATS location (if applicable)
Map Locations of sensitive habitats, watercourses, or other features which are not
to be disturbed
Map Locations of all post-construction BMPs
Map Waste storage areas
Map Vehicle storage areas
Map Material storage areas
Map Entrance and exits
Map Fueling Locations
Notes: (1) Indicate maps or drawings that information is included on (e.g., Vicinity Map, Site
Map, Drainage Plans, Grading Plans, Progress Maps, etc.)
CASQA SWPPP Template 15 December 2019
Section 3 Best Management Practices
3.1 SCHEDULE FOR BMP IMPLEMENTATION
The General Permit requires compliance on a year-round basis, not just during the rainy season,
which is traditionally defined in California to be October 1 through April 1. BMPs must be
implemented in a pro-active manner during all seasons while construction is occurring.
During the rainy season, an effective combination of erosion and sediment control BMPs must
be implemented on all disturbed areas. At a minimum, during the non-rainy season, the
discharger is responsible for ensuring that adequate erosion and sediment control measures are
available in the event of a predicted storm.
Special attention should be given to larger areas of soil disturbance. The contractor should keep
the disturbance area as small as possible in order to implement erosion control as a first resort
and sediment control as a last resort.
In addition, the contractor shall implement a schedule for all BMP maintenance and
implementation.
CASQA SWPPP Template 16 December 2019
Table 3.1 BMP Implementation Schedule BMP Implementation Duration Erosion Control EC-1, Scheduling Prior to Construction Entirety of
Project
EC-2, Preservation of Existing
Vegetation Start of Construction Entirety of
Project
EC-3, Hydraulic Mulch Completion of Slopes Entirety of
Construction
EC-4, Hydroseeding Completion of Slopes Entirety of
Construction
EC-15, Soil Preparation /
Roughening
Completion of Slopes Grading Phase
EC-16; Non-vegetative
Stabilization
Post Construction On going Sediment Control SE-1; Silt Fence Start of Construction Entirety of
Project
SE-2; Temporary Sediment Basin
(Existing)
Start of Construction Existing
SE-4: Check Dams Start of Construction Grading Phase
SE-5; Fiber Rolls Start of Construction Entirety of
Project
SE-7; Street Sweeping Start of Construction Entirety of
Project
SE-8; Gravel Bag Barrier Start of Construction Grading Phase
SE-10; Inlet Protection Start of Construction Entirety of
Project Tracking Control TC-1; Stabilized Construction
Entrance
Start of Construction Entirety of
Project
Wind Erosion WE-1; Wind Erosion Control Start of Construction Entirety of
Project
3.2 EROSION AND SEDIMENT CONTROL
Erosion and sediment controls are required by the General Permit to provide effective reduction
or elimination of sediment related pollutants in stormwater discharges and authorized non-
stormwater discharges from the Site. Applicable BMPs are identified in this section for erosion
control, sediment control, tracking control, and wind erosion control.
Risk Level 2 dischargers shall
· Implement effective wind erosion control.
· Provide effective soil cover for inactive areas and all finished slopes, open space, utility
backfill, and completed lots. Inactive areas of construction are areas of construction
CASQA SWPPP Template 17 December 2019
activity that have been disturbed and are not scheduled to be re-disturbed for at least 14
days.
· Limit the use of plastic materials when more sustainable, environmentally friendly
alternatives exist. Where plastic materials are deemed necessary, the discharger shall
consider the use of plastic materials resistant to solar degradation.
· Establish and maintain effective perimeter controls and stabilize all construction
entrances and exits to sufficiently control erosion and sediment discharges from the site.
CASQA SWPPP Template 18 December 2019
Erosion and Sediment Control Worksheet
General Permit BMP
Requirements
Applicable
to
Project?
CGP
Pg #
Associated
CASQA
BMPs
Selecte
d BMPs
BMP Requirements for Erosion and Sediment Control (Attachment C, D, & E parts D and E)
Implement effective wind erosion
control.
Yes Pg 5 of
Att. C,
D & E
WE-1 WE-1
Provide effective soil cover for
inactive areas and finished slopes,
open space, utility backfill, and
completed lots.
Yes Pg 5 of
Att. C,
D & E
EC-5
EC-16
EC-5
Limit the use of plastic materials
when more sustainable,
environmentally friendly
alternatives exist. Where plastic
materials are deemed necessary, the
QSD shall consider the use of plastic
materials resistant to solar
degradation.
Yes Pg 5 of
Att. C,
D & E
WM-3 WM-3
Establish and maintain effective
perimeter controls and stabilize
construction entrances and exits to
sufficiently control erosion and
sediment discharges from the site.
Yes Pg 5 of
Att. C,
D & E
SE-1, SE-5
SE-7, TC-1
TC-2, TC-3
WM-3
TC-1
SE-7, SE-
1
On sites where sediment basins are
to be used, at a minimum, design
sediment basins according to the
method provided in Stormwater
BMP Handbook Portal:
Construction.
No Pg 5 of
Att. C,
D & E
SE-02 N/A
Implement appropriate erosion
control BMPs (runoff control and
soil stabilization) in conjunction
with sediment control BMPs for
areas under active4 construction.
Yes Pg 5 of
Att. C,
D & E
EC-1, EC-2
EC-5, EC-9
EC-10, EC-16
SE-1, SE-4
SE-5,
EC-4
SE-6
SE-10
Apply linear sediment controls along
the toe of the slope; face of the
slope; and at the grade breaks of
exposed slopes to comply with sheet
flow lengths in accordance with
General Permit.
RL 2 and 3
only
Pg 5 of
Att. D
& E
SE-1, SE-5
SE-7
SE-5
Ensure that construction activity
traffic to and from the project is
limited to entrances and exits that
employ effective controls to prevent
offsite tracking of sediment.
RL 2 and 3
only
Pg 6 of
Att. D
& E
TC-1
TC-2
TC-3
SE-7
TC-1
TC-3
CASQA SWPPP Template 19 December 2019
Erosion and Sediment Control Worksheet
General Permit BMP
Requirements
Applicable
to
Project?
CGP
Pg #
Associated
CASQA
BMPs
Selecte
d BMPs
Ensure that storm drain inlets and
perimeter controls, runoff control
BMPs, and pollutant controls at
entrances and exits (e.g. tire wash-
off locations) are maintained and
protected from activities that reduce
their effectiveness.
RL 2 and 3
only
Pg 6 of
Att. D
& E
All BMPs TC-1
SE-7, SE-
1
Inspect on a daily basis immediate
access roads. At a minimum daily
(when necessary) and prior to a rain
event. The LRP shall remove
sediment or other construction
activity-related materials that are
deposited on the roads (by
vacuuming or sweeping).
RL 2 and 3
only
Pg 6 of
Att. D
& E
TC-1
TC-2
TC-3
SE-7
SE-7
TC-1
The Regional Water Board may
require implementation of
additional site-specific sediment
control requirements if the
implementation of the other
requirements in this section is not
adequately protecting the receiving
waters.
Pg 5
Att. C
Pg 6
Att. D
& E
N/A
BMP Requirements for Run-on and Runoff Controls (Attachment C, D, & E parts F)
Effectively manage run-on, runoff
within the site and runoff that
discharge off the site.
Yes Pg 5
Att. C
Pg 6
Att. D
& E
Se-1, SE-5,
SE-8, SE-10
SE-1
SE-10
Run-on from off-site shall be
directed away from disturbed areas
or shall collectively be in compliance
with the effluent limitation in the
CGP.
Yes Pg 5
Att. C
Pg 6
Att. D
& E
N/A
BMP Requirements for Air Deposition (Attachment C, D, & E parts B.6)
Control the air deposition of site
materials and from site operations.
Such particulates can include, but
are not limited to, sediment,
nutrients, trash, metals, bacteria, oil
and grease and organics.
Yes Pg 4 of
Att. C,
D & E
WE-1 WE-1
CASQA SWPPP Template 20 December 2019
3.2.1 Erosion Control
Erosion control, also referred to as soil stabilization, consists of source control measures that are
designed to prevent soil particles from detaching and becoming transported in stormwater
runoff. Erosion control BMPs protect the soil surface by covering and/or binding soil particles.
This construction project will implement the following practices to provide effective temporary
and final erosion control during construction:
1. Preserve existing vegetation where required and when feasible.
2. The area of soil disturbing operations shall be controlled such that the Contractor
is able to implement erosion control BMPs quickly and effectively.
3. Stabilize non-active areas within 14 days of cessation of construction activities or
sooner if stipulated by local requirements.
4. Control erosion in concentrated flow paths by applying erosion control blankets,
check dams, erosion control seeding, or alternate methods.
5. Prior to the completion of construction, apply permanent erosion control to
remaining disturbed soil areas.
Sufficient erosion control materials shall be maintained onsite to allow implementation in
conformance with this SWPPP.
The following erosion control BMP selection table, Table 3.2 indicates the BMPs that shall be
implemented to control erosion on the construction site. Fact Sheets for temporary erosion
control BMPs are provided in Appendix H.
These temporary erosion control BMPs shall be implemented in conformance with the following
guidelines and as outlined in the BMP Factsheets provided in Appendix H. If there is a
conflict between documents, the Site Map will prevail over narrative in the body of the SWPPP
or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard
details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance
in the BMP Fact Sheets.
CASQA SWPPP Template 21 December 2019 Table 3.2 Erosion Control BMPs CASQA Fact Sheet BMP Name Considered for the Project (1) BMP Used If not used, state reason and alternate BMP, if applicable YES NO EC-1 Scheduling ☒ ☐ EC-2 Preservation of Existing Vegetation ☒ ☐ EC-3 Hydraulic Mulch (2) ☐ ☒ TBD by field QSD/QSP and contractor EC-4 Hydroseed (2) ☒ ☐ EC-5 Soil Binders (2) ☐ ☒ TBD by field QSD/QSP and contractor EC-6 Straw Mulch (2) ☐ ☒ TBD by field QSD/QSP and contractor EC-7 Geotextiles and Mats (2) ☐ ☒ TBD by field QSD/QSP and contractor EC-8 Wood Mulching (2) ☐ ☒ TBD by field QSD/QSP and contractor EC-9 Earth Dike and Drainage Swales (3) ☐ ☒ TBD by field QSD/QSP and contractor EC-10 Velocity Dissipation Devices (3) ☐ ☒ TBD by field QSD/QSP and contractor EC-11 Slope Drains (3) ☐ ☒ Not needed EC-12 Stream Bank Stabilization ☐ ☒ Not needed EC-14 Compost Blankets (2) ☐ ☒ Not needed EC-15 Soil Preparation-Roughening ☒ ☐ EC-16 Non-Vegetated Stabilization (2) ☒ ☐ WE-1 Wind Erosion Control ☒ ☐ (1) The General Permit’s Fact Sheet Section II.J.1.c through II.J.1.g describes various BMPs that should be considered for use on the construction site. (2) The QSD shall ensure implementation of one of the minimum measures listed or a combination thereof to achieve and maintain the Risk Level requirements. (3) All run-on and runoff from the construction site shall be managed for LUP Types 2 and 3 and LUP Type 1 if the evaluation of quantity and quality of run-on and runoff deems them necessary or visual inspections show that the site requires these controls. Run-on from offsite shall be directed away from all disturbed areas, diversion of offsite flows may require design/analysis by a licensed civil engineer and/or additional environmental permitting.
CASQA SWPPP Template 22 December 2019
3.2.2 Sediment Controls
Sediment controls are temporary or permanent structural measures that are intended to
complement the selected erosion control measures and reduce sediment discharges from active
construction areas. Sediment controls are designed to intercept and settle out soil particles that
have been detached and transported by the force of water.
The following sediment control BMP selection table indicates the BMPs that shall be
implemented to control sediment on the construction site. Fact Sheets for temporary sediment
control BMPs are provided in Appendix H.
These temporary sediment control BMPs shall be implemented in conformance with the
following guidelines and in accordance with the BMP Fact Sheets provided in Appendix H. If
there is a conflict between documents, the Site Map will prevail over narrative in the body of the
SWPPP or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over
standard details included in the Site Map. The narrative in the body of the SWPPP prevails over
guidance in the BMP Fact Sheets.
CASQA SWPPP Template 23 December 2019 Table 3.3 Temporary Sediment Control BMPs CASQA Fact Sheet BMP Name Considered for the Project (1) BMP used If not used, state reason and alternate BMP, if applicable YES NO SE-1 Silt Fence (2) (3) ☒ ☐ SE-2 Sediment Basin ☐ ☒ Not necessary SE-3 Sediment Trap ☐ ☒ Not necessary SE-4 Check Dams ☒ ☐ SE-5 Fiber Rolls (2)(3) ☒ ☐ SE-6 Gravel Bag Berm (3) ☒ ☐ SE-7 Street Sweeping ☒ ☐ SE-8 Sandbag Barrier ☐ ☒ Gravel bags can be used SE-9 Straw Bale Barrier ☐ ☒ Durability / Cleanup Issues SE-10 Storm Drain Inlet Protection RL2&3 ☒ ☐ SE-11 ATS ☐ ☒ Not applicable SE-12 Manufactured Linear Sediment Controls ☐ ☒ Optional SE-13 Compost Sock and Berm (3) ☐ ☒ Optional SE-14 Biofilter Bags (3) ☐ ☒ Dewatering Optional TC-1 Stabilized Construction Entrance and Exit ☒ ☐ TC-2 Stabilized Construction Roadway ☐ ☒ TBD by field QSD/QSP and contractor TC-3 Entrance Outlet Tire Wash ☒ ☐ (1) The General Permit’s Fact Sheet Section II.J.1.c through II.J.1.g describes various BMPs that should be considered for use on the construction site. (2) The QSD shall ensure implementation of one of the minimum measures listed or a combination thereof to achieve and maintain the Risk Level requirements. (3) All run-on and runoff from the construction site shall be managed. Risk Level 2 &3 shall provide linear sediment control along toe of slope, face of slope, and at the grade breaks of exposed slope.
CASQA SWPPP Template 24 December 2019
3.3 NON-STORMWATER CONTROLS AND WASTE AND MATERIALS
MANAGEMENT
Non-Stormwater, Construction Materials & Waste Management Worksheet
BMP Requirements
Applicable
to
Project?
CGP
Pg#
Associated
CASQA
BMPs
BMP
selected
for
SWPPP
BMP Requirements for Waste Management (Attachment C, D and E part B.2)
Prevent disposal of rinse or wash waters or
materials on impervious or pervious site
surfaces or into the storm drain system.
Yes
Pg 2,
Att. C,
D & E
NS-1, NS-3
NS-8, NS-12
NS-13
All
Ensure the containment of sanitation
facilities (e.g., portable toilets) to prevent
discharges of pollutants to the stormwater
drainage system or receiving water.
Yes Pg 2,
Att. C,
D & E
WM-9
WM-9
Clean or replace sanitation facilities and
inspecting them regularly for leaks and
spills.
Yes Pg 2,
Att. C,
D & E
WM-9
WM-9
Cover waste disposal containers at the end of
every business day and during a rain event.
Yes
Pg 2,
Att. C,
D & E
WM-1 , M-2
WM-4 , M-5
WM-6,
WM-7
WM-10
All
Prevent discharges from waste disposal
containers to the stormwater drainage
system or receiving water.
Yes
Pg 2,
Att. C,
D & E
WM-1, WM-
2
WM-4,
WM-5
WM-6,
WM-7
WM-9,
WM-10
All
Contain and securely protect stockpiled
waste material from wind and rain at all
times unless actively being used.
Yes Pg 2,
Att. C,
D & E
WM-3
WM-3
Implement procedures that effectively
address hazardous and non-hazardous spills.
Yes Pg 2,
Att. C,
D & E
WM-4
WM-4
Develop a spill response and
implementation element of the SWPPP prior
to commencement of construction activities.
The SWPPP shall require that: Equipment
and materials for cleanup of spills shall be
available onsite and that spills and leaks
shall be cleaned up immediately and
disposed of properly; and appropriate spill
Yes
Pg 2,
Att. C,
D & E
WM-4
WM-4
CASQA SWPPP Template 25 December 2019
Non-Stormwater, Construction Materials & Waste Management Worksheet
BMP Requirements
Applicable
to
Project?
CGP
Pg#
Associated
CASQA
BMPs
BMP
selected
for
SWPPP
response personnel are assigned and
trained.
Ensure the containment of concrete washout
areas and other washout areas that may
contain additional pollutants so there is no
discharge into the underlying soil and onto
the surrounding areas.
Yes
Pg 3,
Att. C,
D & E
WM-8 WM-8
BMP Requirements for Construction Material (Attachment C, D, and E part B.1)
Conduct an inventory of the products used
and/or expected to be used and the end
products that are produced and/or expected
to be produced.
Yes Pg 1,
Att. C,
D & E
All
Cover and berm loose stockpiled
construction materials that are not actively
being used (i.e. soil, spoils, aggregate, fly-
ash, stucco, hydrated lime, etc.).
Yes Pg 1,
Att. C,
D & E
WM-3
WM-3
Store chemicals in watertight containers
(with appropriate secondary containment to
prevent spillage or leakage) or in a storage
shed (completely enclosed).
Yes Pg 2,
Att. C,
D & E
WM-1, WM-
2
WM-4,
WM-6
WM-4,6
Minimize exposure of construction materials
to precipitation.
Yes
Pg 2,
Att. C,
D & E
WM-1, WM-
2
WM-4,
WM-5
WM-6,
WM-7
WM-10
All
Implement BMPs to prevent the off-site
tracking of loose construction and landscape
materials.
Yes
Pg 2,
Att. C,
D & E
TC-1
TC-2
TC-3
TC-1
BMP Requirements for Vehicle Storage and Maintenance (Attachment C, D and E, part
B.3)
Prevent oil, grease, or fuel from leaking into
the ground, storm drains or surface waters.
Yes Pg 3,
Att. C,
D & E
NS-9
NS-10
All
Place equipment or vehicles, which are to be
fueled, maintained and stored in a
designated area fitted with appropriate
BMPs.
Yes Pg 2,
Att. C,
D & E
WM-2,
WM-4
NS-9, NS-
10
All
Clean leaks immediately and disposing of
leaked materials properly.
Yes Pg 2,
Att. C,
D & E
WM-4
WM-4
CASQA SWPPP Template 26 December 2019
Non-Stormwater, Construction Materials & Waste Management Worksheet
BMP Requirements
Applicable
to
Project?
CGP
Pg#
Associated
CASQA
BMPs
BMP
selected
for
SWPPP
BMP Requirements to Control Non-Stormwater Discharges (Attachment C, D and E part
C)
Implement measures to control non-
stormwater discharges during
construction.
Yes
Pg 4,
Att. C, D
& E
NS-3, NS-8
NS-9, NS-10
NS-12, NS-13
TC-1, TC-2
TC-3
All
Wash vehicles in such a manner as to
prevent non-stormwater discharges to
surface waters or MS4 drainage systems.
Yes
Pg 4,
Att. C, D
& E
NS-8 NS-8
Clean streets in such a manner as to
prevent non-stormwater discharges from
reaching surface water or MS4 drainage
systems.
Yes
Pg 4,
Att. C, D
& E
TC-1, TC-2
TC-3, SE-7
TC-1,
SE-7
3.3.1 Non-Stormwater Controls
Non-stormwater discharges into storm drainage systems or waterways which are not authorized
under the General Permit are prohibited. Non-stormwater discharges for which a separate
NPDES permit is required by the local Regional Water Board are prohibited unless coverage
under the separate NPDES permit has been obtained for the discharge. The selection of non-
stormwater BMPs is based on the list of construction activities with a potential for non-
stormwater discharges identified in Section 2.7 of this SWPPP.
The following non-stormwater control BMP selection table indicates the BMPs that shall be
implemented to control sediment on the construction site. Fact Sheets for temporary non-
stormwater control BMPs are provided in Appendix H.
Non-stormwater BMPs shall be implemented in conformance with the following guidelines and
in accordance with the BMP Fact Sheets provided in Appendix H. If there is a conflict between
documents, the Site Map will prevail over narrative in the body of the SWPPP or guidance in the
BMP Fact Sheets. Site specific details in the Site Map prevail over standard details included in
the Site Map. The narrative in the body of the SWPPP prevails over guidance in the BMP Fact
Sheets.
CASQA SWPPP Template 27 December 2019 Table 3.4 Temporary Non-Stormwater BMPs CASQA Fact Sheet BMP Name Considered for the Project (1) BMP used If not used, state reason and alternate BMP, if applicable YES NO NS-1 Water Conservation Practices ☒ ☐ NS-2 Dewatering Operation ☐ ☒ Groundwater not expected during grading. NS-3 Paving and Grinding Operation ☒ ☐ NS-4 Temporary Stream Crossing ☐ ☒ No streams near location NS-5 Clear Water Diversion ☐ ☒ Not applicable NS-6 Illicit Connection/Discharge ☒ ☐ NS-7 Potable Water/Irrigation ☒ ☐ NS-8 Vehicle and Equipment Cleaning ☒ ☐ NS-9 Vehicle and Equipment Fueling ☒ ☐ NS-10 Vehicle and Equipment Maintenance ☒ ☐ NS-11 Pile Driving Operation ☐ ☒ Not applicable NS-12 Concrete Curing ☒ ☐ NS-13 Concrete Finishing ☒ ☐ NS-14 Material and Equipment Use Over Water ☐ ☒ Not applicable NS-15 Demolition Removal Adjacent to Water ☒ ☐ NS-16 Temporary Batch Plants ☐ ☒ Not applicable (1) The General Permit’s Fact Sheet Section II.J.1.c through II.J.1.g describes various BMPs that should be considered for use on the construction site.
CASQA SWPPP Template 28 December 2019
3.3.2 Materials Management and Waste Management
Materials management control practices consist of implementing procedural and structural
BMPs for handling, storing, and using construction materials to prevent the release of those
materials into stormwater discharges. The amount and type of construction materials to be
utilized at the Site will depend upon the type of construction and the length of the construction
period. The materials may be used continuously, such as fuel for vehicles and equipment, or the
materials may be used for a discrete period, such as soil binders for temporary stabilization.
Waste management consist of implementing procedural and structural BMPs for handling,
storing, and ensuring proper disposal of wastes to prevent the release of those wastes into
stormwater discharges. Waste management should be conducted in accordance with the
Project’s Construction Waste Management Plan.
Materials and waste management pollution control BMPs shall be implemented to minimize
stormwater contact with construction materials, wastes and service areas; and to prevent
materials and wastes from being discharged off-site. The primary mechanisms for stormwater
contact that shall be addressed include:
· Direct contact with precipitation
· Contact with stormwater run-on and runoff
· Wind dispersion of loose materials
· Direct discharge to the storm drain system through spills or dumping
· Extended contact with some materials and wastes, such as asphalt cold mix and treated
wood products, which can leach pollutants into stormwater.
A list of construction activities is provided in Section 2.6. The following Materials and Waste
Management BMP selection table, Table 3.5, indicates the BMPs that shall be implemented to
handle materials and control construction site wastes associated with these construction
activities. Fact Sheets for Materials and Waste Management BMPs are provided in Appendix
H.
Material management BMPs shall be implemented in conformance with the following guidelines
and in accordance with the BMP Fact Sheets provided in Appendix H. If there is a conflict
between documents, the Site Map will prevail over narrative in the body of the SWPPP or
guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard
details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance
in the BMP Fact Sheets.
CASQA SWPPP Template 29 December 2019 Table 3.5 Temporary Materials Management BMPs CASQA Fact Sheet BMP Name Considered for Project (1) BMP used If not used, state reason and alternate BMP, if applicable YES NO WM-01 Material Delivery and Storage ☒ ☐ WM-02 Material Use ☒ ☐ WM-03 Stockpile Management ☒ ☐ WM-04 Spill Prevention and Control ☒ ☐ WM-05 Solid Waste Management ☒ ☐ WM-06 Hazardous Waste Management ☒ ☐ WM-07 Contaminated Soil Management ☒ ☐ WM-08 Concrete Waste Management ☒ ☐ WM-09 Sanitary-Septic Waste Management ☒ ☐ WM-10 Liquid Waste Management ☒ ☐ (1) The General Permit’s Fact Sheet Section II.J.1.c through II.J.1.g describes various BMPs that should be considered for use on the construction site.
CASQA SWPPP Template 30 December 2019
3.4 POST CONSTRUCTION STORMWATER MANAGEMENT MEASURES
Post construction BMPs are permanent measures installed during construction, designed to
reduce or eliminate pollutant discharges from the site after construction is completed.
This site is located in an area subject to a Phase I or Phase II Municipal Separate Storm Sewer
System (MS4) permit approved Stormwater Management Plan.
The following source control postconstruction BMPs to comply with General Permit Section
XIII.B and the (MS4) permit/County of San Diego BMP Design Manual local requirements have
been identified for the site:
· Mark all inlets with the words "No Dumping! Flows to Ocean" or similar.
· Final landscape plans will accomplish all of the following:
o Preserve existing native trees, shrubs, and ground cover to the maximum extent
possible.
o Design landscaping to minimize irrigation and runoff, to promote surface
infiltration where appropriate, and to minimize the use of fertilizers and
pesticides that can contribute to stormwater pollution.
o Where landscaped areas are used to retain or detain stormwater, specify plants
that are tolerant of saturated soil conditions.
· To ensure successful establishment, select plants appropriate to site soils, slopes,
climate, sun, wind, rain, land use, air movement, ecological consistency, and plant
interactions.
· Employ rain shutoff devices to prevent irrigation after precipitation.
· Design irrigation systems to each landscape area’s specific water requirements.
· Use flow reducers or shutoff valves triggered by a pressure drop to control water loss in
the event of broken sprinkler heads or lines.
· Employ other comparable, equally effective, methods to reduce irrigation water runoff.
A plan for the post construction funding and maintenance of these BMPs has been developed to
address at minimum five years following construction. The post construction BMPs that are
described above shall be funded and maintained by the Legally Responsible Person. If required,
post construction funding and maintenance will be submitted with the NOT.
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Section 4 BMP Inspection, Maintenance Rain
Event Action Plans
4.1 BMP INSPECTION AND MAINTENANCE
The General Permit requires routine weekly inspections of BMPs, along with inspections before,
during, and after qualifying rain events. A BMP inspection checklist must be filled out for
inspections and maintained on-site onsite with the SWPPP. The inspection checklist includes
the necessary information covered in Section 7.6. A blank inspection checklist can be found in
Appendix I. Completed checklists shall be kept in CSMP Appendix P “Monitoring Records”.
BMPs shall be maintained regularly to ensure proper and effective functionality. If necessary,
corrective actions shall be implemented within 72 hours of identified deficiencies and associated
amendments to the SWPPP shall be prepared by the QSD.
Specific details for maintenance, inspection, and repair of Construction Site BMPs can be found
in the BMP Factsheets in Appendix H.
4.2 RAIN EVENT ACTION PLANS
The REAP is a written document designed to be used as a planning tool by the QSP to protect
exposed portions of project sites and to ensure that the discharger has adequate materials, staff,
and time to implement erosion and sediment control measures. These measures are intended to
reduce the amount of sediment and other pollutants that could be generated during the rain
event. It is the responsibility of the QSP to be aware of precipitation forecast and to obtain and
print copies of NOAA’s Forecast Weather Table Interface, available online at
http://forecast.weather.gov /.
The project is located in zip code 92011
The SWPPP includes REAP templates but the QSP will need to customize them for each rain
event. Site-specific REAP templates for each applicable project phase can be found in Appendix
J. The QSP shall maintain a paper copy of completed REAPs in compliance with the record
retention requirements Section 1.5 of this SWPPP. Completed REAPs shall be maintained in
Appendix J.
The QSP will develop an event specific REAP 48 hours in advance of a precipitation event
forecast to have a 50 percent or greater chance of producing precipitation in the project area.
The REAP will be onsite and be implemented 24 hours in advance of any the predicted
precipitation event.
At minimum the REAP will include the following site and phase-specific information:
1. Site Address;
2. Calculated Risk Level (2 or 3);
3. Site Stormwater Manager Information including the name, company and 24-hour
emergency telephone number;
4. Erosion and Sediment Control Provider information including the name, company and
24-hour emergency telephone number;
5. Stormwater Sampling Agent information including the name, company, and 24-hour
emergency telephone number;
CASQA SWPPP Template 32 December 2019
6. Activities associated with each construction phase;
7. Trades active on the construction site during each construction phase;
8. Trade contractor information; and
9. Recommended actions for each project phase.
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Section 5 Training
Appendix L identifies the QSPs for the project. To promote stormwater management
awareness specific for this project, periodic training of job-site personnel shall be included as
part of routine project meetings (e.g. daily/weekly tailgate safety meetings), or task specific
trainings as needed.
The QSP shall be responsible for providing this information at the meetings, and subsequently
completing the training logs shown in Appendix K, which identify the site-specific stormwater
topics covered as well as the names of site personnel who attended the meeting. Tasks may be
delegated to trained employees by the QSP provided adequate supervision and oversight is
provided. Training shall correspond to the specific tasks delegated, including SWPPP
implementation, BMP inspection and maintenance, and recordkeeping.
Documentation of training activities (formal and informal) is retained in SWPPP Appendix K.
CASQA SWPPP Template 34 December 2019
Section 6 Responsible Parties and Operators
6.1 RESPONSIBLE PARTIES
Approved Signatories who are responsible for SWPPP implementation and have authority to
sign permit-related documents are listed below. Written authorizations from the LRP for these
individuals are provided in Appendix L. The Approved Signatories assigned to this project are:
Name Title Phone Number
Dennis Szuberla Chief Financial Officer 858-535-1475
QSPs identified for the project are identified in Appendix L. The QSP shall have primary
responsibility and significant authority for the implementation, maintenance, and
inspection/monitoring of SWPPP requirements. The QSP will be available at all times
throughout the duration of the project. Duties of the QSP include but are not limited to:
· Implementing all elements of the General Permit and SWPPP, including, but not limited
to:
o Ensuring that all BMPs are implemented, inspected, and properly maintained;
o Performing non-stormwater and stormwater visual observations and inspections;
o Performing non-stormwater and storm sampling and analysis, as required;
o Performing routine inspections and observations;
o Implementing non-stormwater management, and materials and waste
management activities such as: monitoring discharges; general Site clean-up;
vehicle and equipment cleaning, fueling and maintenance; spill control; ensuring
that no materials other than stormwater are discharged in quantities which will
have an adverse effect on receiving waters or storm drain systems, etc.;
· The QSP may delegate these inspections and activities to an appropriately trained
employee but shall ensure adequacy and adequate deployment.
· Ensuring elimination of unauthorized discharges.
· The QSPs shall be assigned authority by the LRP to mobilize crews in order to make
immediate repairs to the control measures.
· Coordinate with the Contractor(s) to assure all of the necessary corrections/repairs are
made immediately and that the project complies with the SWPPP, General Permit, and
approved plans at all times.
· Notifying the LRP or Authorized Signatory immediately of off-site discharges or other
non-compliance events
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6.2 CONTRACTOR LIST
The General Permit (Section VII.B.5) requires that the SWPPP include a list of names of all
contractors, subcontractors, and individuals who will be directed by the QSP. The list is
required to include telephone numbers and work addresses and the specific areas of
responsibility of each subcontractor and emergency contact numbers. See Appendix M for a
list of contractors and subcontractors.
CASQA SWPPP Template 36 December 2019
Section 7 Construction Site Monitoring Program
7.1 PURPOSE
This Construction Site Monitoring Program was developed to address the following objectives:
1. To demonstrate that the site is in compliance with the Discharge Prohibitions and
Numeric Action Levels (NALs) of the Construction General Permit;
2. To determine whether non-visible pollutants are present at the construction site and
are causing or contributing to exceedances of water quality objectives;
3. To determine whether immediate corrective actions, additional Best Management
Practices (BMP) implementation, or SWPPP revisions are necessary to reduce
pollutants in stormwater discharges and authorized non-stormwater discharges;
4. To determine whether BMPs included in the SWPPP and REAP are effective in
preventing or reducing pollutants in stormwater discharges and authorized non-
stormwater discharges.
7.2 APPLICABILITY OF PERMIT REQUIREMENTS
This project has been determined to be a Risk Level 2 project. The General Permit identifies the
following types of monitoring as being applicable for a Risk Level 2 project.
Risk Level 2
· Visual inspections of BMPs;
· Visual monitoring of the site related to qualifying storm events;
· Visual monitoring of the site for non-stormwater discharges;
· Sampling and analysis of construction site runoff for pH and turbidity;
· Sampling and analysis of construction site runoff for non-visible pollutants when
applicable; and
· Sampling and analysis of non-stormwater discharges when applicable.
7.3. WEATHER AND RAIN EVENT TRACKING
Visual monitoring, inspections, and sampling requirements of the General Permit are triggered
by a qualifying rain event. The General Permit defines a qualifying rain event as any event that
produces ½ inch of precipitation. A minimum of 48 hours of dry weather will be used to
distinguish between separate qualifying storm events.
7.3.1 Weather Tracking
The QSP should daily consult the National Oceanographic and Atmospheric Administration
(NOAA) for the Forecast Weather Table Interface. These forecasts can be obtained at
http://forecast.weather.gov .
The project is located in zip code 92011
Weather reports should be printed and maintained with the SWPPP in Appendix O.
7.3.2 Rain Gauges
The QSP shall install 1 rain gauge on the project site rain. Locate the gauge in an open area away
from obstructions such as trees or overhangs. Mount the gauge on a post at a height of 3 to 5 feet
with the gauge extending several inches beyond the post. Make sure that the top of the gauge is
level. Make sure the post is not in an area where rainwater can indirectly splash from sheds,
equipment, trailers, etc.
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The rain gauge(s) shall be read daily during normal site scheduled hours. The rain gauge should
be read at approximately the same time every day and the date and time of each reading
recorded. Log rain gauge readings in Appendix O. Follow the rain gauge instructions to
obtain accurate measurements.
Once the rain gauge reading has been recorded, accumulated rain shall be emptied, and the
gauge reset.
For comparison with the site rain gauge, the nearest appropriate governmental rain gauge(s) is
located at Carlsbad https://www.cnrfc.noaa.gov/precipMaps.php?group=san&img=3.
7.4 MONITORING LOCATIONS
Monitoring locations are shown on the Site Maps in Appendix B. Monitoring locations are
described in the Sections 7.6 and 7.7.
Whenever changes in the construction site might affect the appropriateness of sampling
locations, the sampling locations shall be revised accordingly. All such revisions shall be
implemented as soon as feasible and the SWPPP amended. Temporary changes that result in a
one-time additional sampling location do not require a SWPPP amendment.
7.5 SAFETY AND MONITORING EXEMPTIONS
Safety practices for sample collection will be in accordance with the health and safety plan
(prepared by the QSP) titled:
Dated
or if one is not available, list the safety requirements that apply to sampling personnel below.
Safety Requirements
This project is not required to collect samples or conduct visual observations (inspections)
under the following conditions:
· During dangerous weather conditions such as flooding and electrical storms.
· Outside of scheduled site business hours.
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Scheduled site business hours are:
Start time End time
Monday To
Tuesday To
Wednesday To
Thursday To
Friday To
Saturday To
Sunday To
If monitoring (visual monitoring or sample collection) of the site is unsafe because of the
dangerous conditions noted above, then the QSP shall document the conditions for why an
exception to performing the monitoring was necessary. The exemption documentation shall be
filed in Appendix P “Monitoring Records”.
7.6 VISUAL MONITORING
Visual monitoring includes observations and inspections. Inspections of BMPs are required to
identify and record BMPs that need maintenance to operate effectively, that have failed, or that
could fail to operate as intended. Visual observations of the site are required to observe storm
water drainage areas to identify any spills, leaks, or uncontrolled pollutant sources.
7.6.1 Routine Observations and Inspections
Routine site inspections and visual monitoring are necessary to ensure that the project is in
compliance with the requirements of the Construction General Permit.
7.6.1.1 Routine BMP Inspections
Inspections of BMPs are conducted to identify and record:
BMPs that are properly installed;
BMPs that need maintenance to operate effectively;
BMPs that have failed; or
BMPs that could fail to operate as intended.
7.6.1.2 Non-Stormwater Discharge Observations
Each drainage area will be inspected for the presence of or indications of prior unauthorized and
authorized non-stormwater discharges. Inspections will record:
· Presence or evidence of any non-stormwater discharge (authorized or unauthorized);
· Pollutant characteristics (floating and suspended material, sheen, discoloration,
turbidity, odor, etc.); and
· Source of discharge.
7.6.2 Rain-Event Triggered Observations and Inspections
Visual observations of the site and inspections of BMPs are required prior to a qualifying rain
event; following a qualifying rain event, and every 24-hour period during a qualifying rain event.
Pre-rain inspections will be conducted after consulting NOAA and determining that a
CASQA SWPPP Template 39 December 2019
precipitation event with a 50 percent or greater probability of precipitation has been predicted
on the Forecast Weather Table Interface.
7.6.2.1 Visual Observations Prior to a Forecasted Qualifying Rain Event
Within 48 hours prior to a qualifying event, a stormwater visual monitoring site inspection will
include observations of the following locations:
· Stormwater drainage areas to identify any spills, leaks, or uncontrolled pollutant
sources;
· BMPs to identify if they have been properly implemented;
· Any stormwater storage and containment areas to detect leaks and ensure maintenance
of adequate freeboard.
BMP inspections and visual monitoring will be triggered by a NOAA prediction of rain in the
project area.
or
Consistent with guidance from the State Water Resources Control Board, pre-rain BMP
inspections and visual monitoring will be triggered by a NOAA forecast that indicates a
probability of precipitation of 50 percent or more in the project area.
or
BMP inspections and visual monitoring will be triggered by a NOAA quantitative predicted
forecast (QPF) that indicates ½-inch or more of rain will occur in the project area.]
7.6.2.2 BMP Inspections During an Extended Storm Event
During an extended rain event BMP inspection will be conducted to identify and record:
· BMPs that are properly installed;
· BMPs that need maintenance to operate effectively;
· BMPs that have failed; or
· BMPs that could fail to operate as intended.
If the construction site is not accessible during the rain event, the visual inspections shall be
performed at all relevant outfalls, discharge points, downstream locations. The inspections
should record any projected maintenance activities.
7.6.2.3 Visual Observations Following a Qualifying Rain Event
Within 48 hours following a qualifying rain event (0.5 inches of rain), a stormwater visual
monitoring site inspection is required to observe:
· Stormwater drainage areas to identify any spills, leaks, or uncontrolled pollutant
sources;
· BMPs to identify if they have been properly designed, implemented, and effective;
· Need for additional BMPs;
· Any stormwater storage and containment areas to detect leaks and ensure maintenance
of adequate freeboard; and
· Discharge of stored or contained rain water.
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7.6.3 Visual Monitoring Procedures
Visual monitoring shall be conducted by the QSP or staff trained by and under the supervision of
the QSP.
The name(s) and contact number(s) of the site visual monitoring personnel are listed below and
their training qualifications are provided in Appendix K.
Assigned inspector:
Phone
Number:
Alternate Inspector:
Phone
Number:
Stormwater observations shall be documented on the Visual Inspection Field Log Sheet (see
Appendix Q “Example Forms”). BMP inspections shall be documented on the site-specific
BMP inspection checklist. Any photographs used to document observations will be referenced
on stormwater site inspection report and maintained with the Monitoring Records in
Appendix P.
The QSP shall within 2 days of the inspection submit copies of the completed inspection report
to the contractor and Approve Signatory.
The completed reports will be kept in Appendix P “Monitoring Records”.
7.6.4 Visual Monitoring Follow-Up and Reporting
Correction of deficiencies identified by the observations or inspections, including required
repairs or maintenance of BMPs, shall be initiated and completed as soon as possible.
If identified deficiencies require design changes, including additional BMPs, the implementation
of changes will be initiated within 72 hours of identification and be completed as soon as
possible. When design changes to BMPs are required, the SWPPP shall be amended to reflect
the changes.
Deficiencies identified in site inspection reports and correction of deficiencies will be tracked on
the Inspection Field Log Sheet or BMP Inspection Report and shall be submitted to the QSP and
shall be kept in Appendix P “Monitoring Records”.
The QSP shall within 2 days of the inspection submit copies of the completed Inspection Field
Log Sheet or BMP Inspection Report with the corrective actions to the Approve Signatory.
Results of visual monitoring must be summarized and reported in the Annual Report.
7.6.5 Visual Monitoring Locations
The inspections and observations identified in Sections 7.6.1 and 7.6.2 will be conducted at
the locations identified in this section.
BMP locations are shown on the Site Maps in SWPPP Appendix B.
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Drainage area(s) are shown on the Site Maps in Appendix B and Table 7.2 identifies each
drainage area by location.
Table 7.2 Site Drainage Areas
Potential Visual Monitoring Location Latitude Longitude
Onsite inlet 33° 7' 20” N -117° 18' 12” W
Onsite inlet 33° 7' 17” N -117° 18' 13” W
Offsite run on location 33° 7' 16” N -117° 18' 12” W
AC Spillway on Laurel Tree Lane 33° 7' 19"N -117°18' 1" W
North driveway on Aviara Parkway 33° 7' 20"N -117°18' 7" W
Curb inlet @ north bound Aviara Parkway 33° 7' 24" N -117°18' 5" W
Curb inlet @ south bound Aviara Parkway 33° 7' 24" N -117°18' 6" W
Aviara East (driveway) 33° 7' 21" N -117°18' 7" W
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Stormwater storage or containment area(s) are shown on the Site Maps in Appendix B and
Table 7.3 identifies each stormwater storage or containment area by location.
Table 7.3 Stormwater Storage and Containment Areas
Discharge Location Latitude Longitude
Basin #1 33° 7' 21” N -117° 18' 10” W
Basin #2 33° 7' 20” N -117° 18' 9” W
Basin #3 33° 7' 20” N -117° 18' 8” W
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Site stormwater discharge location(s) are shown on the Site Maps in Appendix B and Table
7.4 identifies each stormwater discharge location.
Table 7.4 Site Stormwater Discharge Locations
Discharge Location Latitude Longitude
AC Spillway on Laurel Tree Lane 33° 7'19.70"N 117°18'1.46"W
Curb inlet @ north bound Aviara Parkway 33° 7'24.66"N 117°18'5.70"W
Curb inlet @ south bound Aviara Parkway 33° 7'24.83"N 117°18'6.85"W
Headwall at NW corner of Aviara West 33° 7'19.47"N 117°18'16"W
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7.7 WATER QUALITY SAMPLING AND ANALYSIS
7.7.1 Sampling and Analysis Plan for Non-Visible Pollutants in Stormwater
Runoff Discharges
This Sampling and Analysis Plan for Non-Visible Pollutants describes the sampling and analysis
strategy and schedule for monitoring non-visible pollutants in stormwater runoff discharges
from the project site.
Sampling for non-visible pollutants will be conducted when:
1. a breach, leakage, malfunction, or spill is observed; and
2. the leak or spill has not been cleaned up prior to the rain event; and
3. there is the potential for discharge of non-visible pollutants to surface waters or drainage
system.
Construction materials, wastes, or activities, as identified in Section 2.6, are potential sources
of non-visible pollutants to stormwater discharges from the project. Pollutants associated with
construction activities can be found in tables located in Appendix G. Storage, use, and
operational locations are shown on the Site Maps in Appendix B.
Existing site features can be potential sources of non-visible pollutants to stormwater discharges
from the project.
Existing Potential Non-Visible Pollution
The following soil amendments have the potential to change the chemical properties,
engineering properties, or erosion resistance of the soil and will be used on the project site.
Locations of soil amendment application are shown on the Site Maps in Appendix B.
Soil Amendments
Lime / Gypsum
Fertilizer
Topsoil / Mulch – Biofiltration Basins
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The project has the potential to receive stormwater run-on from the following locations with the
potential to contribute non-visible pollutants to stormwater discharges from the project.
Locations of such run-on to the project site are shown on the Site Maps in Appendix B.
Potential Run-on Locations Latitude Longitude
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7.7.1.1 Sampling Schedule
Samples for the potential non-visible pollutant(s) and a sufficiently large unaffected background
sample shall be collected during the first two hours of discharge from rain events that result in
a sufficient discharge for sample collection. Samples shall be collected during the site’s
scheduled hours and shall be collected regardless of the time of year and phase of the
construction.
Collection of discharge samples for non-visible pollutant monitoring will be triggered when any
of the following conditions are observed during site inspections conducted prior to or during a
rain event.
· Materials or wastes containing potential non-visible pollutants are not stored under
watertight conditions. Watertight conditions are defined as:
1. storage in a watertight container
2. storage under a watertight roof or within a building, or
3. protected by temporary cover and containment that prevents stormwater
contact and runoff from the storage area.
· Materials or wastes containing potential non-visible pollutants are stored under
watertight conditions, but
1. a breach, malfunction, leakage, or spill is observed,
2. the leak or spill is not cleaned up prior to the rain event, and
3. there is the potential for discharge of non-visible pollutants to surface waters
or a storm drain system.
· A construction activity, including but not limited to those in Section 2.6, with the
potential to contribute non-visible pollutants
1. was occurring during or within 24 hours prior to the rain event,
2. BMPs were observed to be breached, malfunctioning, or improperly
implemented, and
3. there is the potential for discharge of non-visible pollutants to surface waters
or a storm drain system.
· Soil amendments that have the potential to change the chemical properties,
engineering properties, or erosion resistance of the soil have been applied, and there
is the potential for discharge of non-visible pollutants to surface waters or a storm
drain system.
· Stormwater runoff from an area contaminated by historical usage of the site has been
observed to combine with stormwater runoff from the site, and there is the potential
for discharge of non-visible pollutants to surface waters or a storm drain system.
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7.7.1.2 Sampling Locations
Sampling locations are based on proximity to planned non-visible pollutant storage, occurrence
or use, accessibility for sampling, and personnel safety. Planned non-visible pollutant sampling
locations shall be determined in the field by the QSP or contractor.
Table 7.5 Non-Visible Pollutant Sample Locations – Contractors’ Yard
Potential Sampling Location Latitude Longitude
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The number of sampling locations have been identified for the collection of samples of runoff
from drainage areas where soil amendments will be applied that have the potential to affect
water quality. Locations shall be determined in the field by the QSP or contractor where soil
amendments are used.
Table 7.6 Non-Visible Pollutant Sample Locations – Soil Amendment
Areas
Potential Sampling Location Latitude Longitude
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The number of sampling locations have been identified for the collection of samples of runoff
from drainage areas contaminated by historical usage of the site.
Table 7.7 Non-Visible Pollutant Sample Locations – Areas of Historical
Contamination
Potential Sampling Location Latitude Longitude
Loading dock 33° 7'18"N 117°18'13"W
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The number of sampling location(s) has been identified for the collection of an uncontaminated
sample of runoff as a background sample for comparison with the samples being analyzed for
non-visible pollutants. This location shall be selected such that the sample will not have come in
contact with the operations, activities, or areas identified in Section 7.7.1 or with disturbed soils
areas. Location will be identified by QSP or contractor in the field.
Table 7.8 Non-Visible Pollutant Sample Locations – Background
(Unaffected Sample)
Potential Sampling Location Latitude Longitude
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The number of sampling locations have been identified for the collection of samples of run-on to
the project site. Run-on from these locations has the potential to combine with discharges from
the site being sampled for non-visible pollutants. These samples are intended to identify
potential sources of non-visible pollutants that originate off the project site.
Table 7.9 Non-Visible Pollutant Sample Locations – Site Run-On
Potential Sampling Location Latitude Longitude
See Map 33° 7'16"N 117°18'13"W
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If a stormwater visual monitoring site inspection conducted prior to or during a storm event
identifies the presence of a material storage, waste storage, operations area with spills, or the
potential for the discharge of non-visible pollutants to surface waters or a storm drain system
that is at a location not listed above and has not been identified on the Site Maps, sampling
locations will be selected by the QSP using the same rationale as that used to identify planned
locations. Non-visible pollutant sampling locations shall be identified by the QSP on the
pre-rain event inspection form or the REAP prior to a forecasted qualifying rain event.
7.7.1.3 Monitoring Preparation
Non-visible pollutant samples will be collected by:
YES NO CONTACT NAME PHONE NUMBER
Contractor
Consultant
If samples on the project site will be collected by the following contractor sampling personnel,
please provide the following:
Company Name:
Street Address:
City, State Zip:
Telephone Number:
Point of Contact:
Name of Sampler(s):
Name of Alternate(s):
An adequate stock of monitoring supplies and equipment for monitoring non-visible pollutants
will be available on the project site prior to a sampling event. Monitoring supplies and
equipment will be stored in a cool temperature environment that will not come into contact with
rain or direct sunlight. Sampling personnel will be available to collect samples in accordance
with the sampling schedule. Supplies maintained at the project site will include, but are not
limited to, clean powder-free nitrile gloves, sample collection equipment, coolers, appropriate
number and volume of sample bottles, identification labels, re-sealable storage bags, paper
towels, personal rain gear, ice, and Effluent Sampling Field Log Sheets and Chain of Custody
(CoC) forms, which are provided in Appendix Q “Example Forms”.
If samples on the project site will be collected by a laboratory, please provide the following:
Company Name:
Street Address:
City, State Zip:
Telephone Number:
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Point of Contact:
Name of Sampler(s):
Name of Alternate(s):
The QSP or his/her designee will contact samplers 24 hours prior to a predicted rain event or
for an unpredicted event, as soon as a rain event begins if one of the triggering conditions is
identified during an inspection to ensure that adequate sample collection personnel and
supplies for monitoring non-visible pollutants are available and will be mobilized to collect
samples on the project site in accordance with the sampling schedule.
7.7.1.4 Analytical Constituents
Table 7.10 lists the specific sources and types of potential non-visible pollutants on the project
site and the water quality indicator constituent(s) for that pollutant.
Table 7.10 Potential Non-Visible Pollutants and Water Quality Indicator
Constituents
General Work Activity/ Potential
Pollutants
Mark
“X”
Water Quality Indicators of Potential Constituents
(Review product literature and Material Safety Data
Sheets to confirm potential constituents)
Adhesives X COD, Phenols, SVOCs
Asphalt Work X VOCs
Cleaning X
Acids X pH
Bleaches X Residual chlorine
TSP X Phosphate
Solvents X VOCs, SVOCs
Detergents X MBAS
Concrete / Masonry Work X pH
Sealant (Methyl methacrylate) X SVOC
Curing compounds X VOCs, SVOCs, pH
Ash, slag, sand X pH, Al, Ca, Va, Zn
Drywall X Cu, Al, General Minerals
Framing / Carpentry X As, Zn
Treated Wood X Cu, Cr, As, Zn
Particle board X Formaldehyde
Untreated wood X BOD
Grading / Earthworks X TDS
Gypsum / Lime amendments X pH
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Table 7.10 Potential Non-Visible Pollutants and Water Quality Indicator
Constituents
General Work Activity/ Potential
Pollutants
Mark
“X”
Water Quality Indicators of Potential Constituents
(Review product literature and Material Safety Data
Sheets to confirm potential constituents)
Contaminated Soil X Constituents specific to known contaminants, check with
Laboratory
Heating, Ventilation, Air Conditioning X Freon
Insulation X Al, Zn
Landscaping X pH
Pesticides/Herbicides Product dependent, see label and check with Laboratory
Fertilizers X TKN, NO3, BOD, COD, DOC, Sulfate, NH3,
Phosphate, Potassium
Aluminum sulfate Al, TDS, Sulfate
Liquid Waste X Constituents specific to materials, check with Laboratory
Painting X Product specific, VOC, SVOC,
Resins X COD, SVOCs
Thinners X COD, VOCs
Paint strippers X VOCs, SVOCs, metals
Lacquers, varnishes, enamels X COD, VOCs, SVOCs
Sealants X COD
Adhesives X Phenols, SVOCs
Planting / Vegetation Management X pH, Product specific
Vegetation stockpiles X BOD
Fertilizers X TKN, NO3, BOD, COD, DOC, sulfate, NH3,
Phosphate, Potassium
Pesticides/Herbicides X Product dependent, see label and check with Laboratory
Plumbing X Product specific
Solder, flux, pipe fitting X Cu, Pb, Sn, Zn
Pools and Fountains Residual chlorine, Cu, chloramines
Removal of existing structures X Zn, VOCs, PCBs (see also other applicable activity
categories, e.g., grading, painting)
Roofing X Cu, Pb, VOCs
Sanitary Waste Sewer line breaks and
Portable Toilets (using clear fluid – blue
fluid is visible if discharged)
X BOD, Total/Fecal coliform
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Table 7.10 Potential Non-Visible Pollutants and Water Quality Indicator
Constituents
General Work Activity/ Potential
Pollutants
Mark
“X”
Water Quality Indicators of Potential Constituents
(Review product literature and Material Safety Data
Sheets to confirm potential constituents)
Soil Preparation / Amendments/Dust
Control
X Product specific
Polymer/Co-polymers X TKN, NO3, BOD, COD, DOC, Sulfate, Ni
Lignin sulfate TDS, alkalinity
Psyllium COD, TOC
Guar/Plant Gums COD, TOC, Ni
Solid Waste (leakage) X BOD
Utility Line Testing and Flushing X Residual chlorine, chloramines
Vehicle and Equipment Use X Product specific
Batteries X Sulfuric acid; Pb, pH
Adapted from Attachment S, Caltrans SWPPP/WPCP Preparation Manual, February 2003, and CASQA Construction BMP Handbook,
2003
7.7.1.5 Sample Collection
Samples of discharge shall be collected at the designated non-visible pollutant sampling
locations shown on the Site Maps in Appendix B or in the locations determined by observed
breaches, malfunctions, leakages, spills, operational areas, soil amendment application areas,
and historical site usage areas that triggered the sampling event.
Grab samples shall be collected and preserved in accordance with the methods identified in the
Table 7.11, “Sample Collection, Preservation and Analysis for Monitoring Non-Visible
Pollutants” provided in Section 7.7.1.6. Only the QSP, or personnel trained in water quality
sampling under the direction of the QSP shall collect samples.
Sample collection and handling requirements are described in Section 7.7.7.
7.7.1.6 Sample Analysis
Samples shall be analyzed using the analytical methods identified in the Table 7.11.
Samples will be analyzed by:
Laboratory Name:
Street Address:
City, State Zip:
Telephone Number:
Point of Contact:
CASQA SWPPP Template 56 December 2019
ELAP Certification
Number:
Samples will be delivered to the laboratory by:
YES NO
Contractor
Laboratory Courier
Shipped
Please provide the contact information below:
Company Name:
Street Address:
City, State Zip:
Telephone
Number:
Point of Contact:
7.7.1.7 Data Evaluation and Reporting
The QSP shall complete an evaluation of the water quality sample analytical results.
Runoff/downgradient results shall be compared with the associated upgradient/unaffected
results and any associated run-on results. Should the runoff/downgradient sample show an
increased level of the tested analyte relative to the unaffected background sample, which cannot
be explained by run-on results, the BMPs, site conditions, and surrounding influences shall be
assessed to determine the probable cause for the increase.
As determined by the site and data evaluation, appropriate BMPs shall be repaired or modified
to mitigate discharges of non-visible pollutant concentrations. Any revisions to the BMPs shall
be recorded as an amendment to the SWPPP.
CASQA SWPPP Template 57 December 2019 Table 7.11 Sample Collection, Preservation and Analysis for Monitoring Non-Visible Pollutants Constituent Analytical Method Minimum Sample Volume Sample Containers Sample Preservation Reporting Limit Maximum Holding Time Notes:
CASQA SWPPP Template 58 December 2019
The General Permit prohibits the storm water discharges that contain hazardous substances
equal to or in excess of reportable quantities established in 40 C.F.R. §§ 117.3 and 302.4. The
results of any non-stormwater discharge results that indicate the presence of a hazardous
substance in excess of established reportable quantities shall be immediately reported to the
Regional Water Board and other agencies as required by 40 C.F.R. §§ 117.3 and 302.4.
Results of non-visible pollutant monitoring shall be reported in the Annual Report.
7.7.2 Sampling and Analysis Plan for pH and Turbidity in Stormwater
Runoff Discharges
Sampling and analysis of runoff for pH and turbidity is required for this project. This Sampling
and Analysis Plan describes the strategy for monitoring turbidity and pH levels of stormwater
runoff discharges from the project site and run-on that may contribute to an exceedance of a
Numeric Action Level (NAL).
Samples for pH and turbidity will be collected at all discharge points where stormwater is
discharged off-site.
7.7.2.1 Sampling Schedule
Stormwater runoff samples shall be collected for pH and turbidity from each day of a qualifying
rain event that results in a discharge from the project site. A minimum of three samples will be
collected per day of discharge during a qualifying event. Samples should be representative of
the total discharge from the project each day of discharge during the qualifying event. Typically,
representative samples will be spaced in time throughout the daily discharge event.
Stored or collected water from a qualifying storm event when discharged shall be tested for
turbidity and pH. Stored or collected water from a qualifying event may be sampled at the point
it is released from the storage or containment area or at the site discharge location.
Run-on samples shall be collected whenever the QSP identifies that run-on has the potential to
contribute to an exceedance of a NAL.
7.7.2.2 Sampling Locations
Sampling locations are based on the site runoff discharge locations and locations where run-on
enters the site, accessibility for sampling, and personnel safety. Planned pH and turbidity
sampling locations are shown on the Site Maps in Appendix B and include the locations
identified in Table 7.13 and Table 7-14.
Sampling location(s) on the project site and the contractor’s yard have been identified for the
collection of runoff samples.
Table 7.12 Turbidity and pH Runoff Sample Locations
Sample Location Latitude Longitude Estimate of Site
[Factor] (%)
#9 Per Site Map 33° 7'16"N 117°18'13"W 60
#6 Per Site Map 33° 7'20"N 117°18'01"W 40
Sampling locations have been identified for the collection of run-on samples where the run-on
has the potential to contribute to an exceedance of an NAL. Table 7.13 identifies the run-on
sample locations.
CASQA SWPPP Template 59 December 2019
Table 7.13 Turbidity and pH Run-On Sample Locations
Sample Location
Number Sample Location Latitude Longitude
#3 Per Site Map Southwest Corner 33° 7'16"N 117°18'13"W
7.7.2.3 Monitoring Preparation
Turbidity and pH samples will be collected and analyzed by:
YES NO
Contractor
Laboratory Courier
Shipped
Samples on the project site will be collected by the following contractor sampling personnel:
Company Name:
Street Address:
City, State Zip:
Telephone
Number:
Point of Contact:
An adequate stock of monitoring supplies and equipment for monitoring turbidity and will be
available on the project site prior to a sampling event. Monitoring supplies and equipment will
be stored in a cool temperature environment that will not come into contact with rain or direct
sunlight. Sampling personnel will be available to collect samples in accordance with the
sampling schedule. Supplies maintained at the project site will include, but are not limited to,
field meters, extra batteries, clean powder-free nitrile gloves, sample collection equipment,
appropriate sample containers, paper towels, personal rain gear, and Effluent Sampling Field
Log Sheets and CoC forms provided in Appendix Q “Example Forms”.
The contractor will obtain and maintain the field-testing instruments, as identified in Section
7.7.2.6, for analyzing samples in the field by contractor sampling personnel.
If samples on the project site will be collected by a laboratory, please provide the following:
CASQA SWPPP Template 60 December 2019
Company Name:
Street Address:
City, State, Zip:
Telephone Number:
Point of Contact:
Name of Sampler(s):
Name of Alternate(s):
The QSP or his/her designee will contact sampler(s) 24 hours prior to a predicted rain event or
for an unpredicted event, as soon as a rain event begins to ensure that adequate sample
collection personnel, supplies for monitoring pH and turbidity are available and will be
mobilized to collect samples on the project site in accordance with the sampling schedule.
7.7.2.4 Field Parameters
Samples shall be analyzed for the constituents indicated in the Table 7.14.
Table 7.14 Sample Collection and Analysis for Monitoring Turbidity and pH
Parameter Test Method
Minimum
Sample
Volume (1)
Sample Collection
Container Type
Detection
Limit
(minimum)
Turbidity
Field meter/probe with
calibrated portable
instrument
500 mL
Polypropylene or glass
(Do not collect in
meter sample cells)
1 NTU
pH
Field meter/probe with
calibrated portable
instrument or calibrated
pH test kit
100 mL Polypropylene 0.2 pH units
Notes: 1 Minimum sample volume recommended. Specific volume requirements will vary by instrument;
check instrument manufacturer instructions.
L – Liter
mL – Milliliter
NTU – Nephelometric Turbidity Unit
7.7.2.5 Sample Collection
Samples of discharge shall be collected at the designated runoff and run-on sampling locations
shown on the Site Maps in Appendix B. Run-on samples shall be collected within close
proximity of the point of run-on to the project.
Only personnel trained in water quality sampling and field measurements working under the
direction of the QSP shall collect samples.
Sample collection and handling requirements are described in Section 7.7.7.
CASQA SWPPP Template 61 December 2019
7.7.2.6 Field Measurements
Samples collected for field analysis, collection, analysis and equipment calibration shall be in
accordance with the field instrument manufacturer’s specifications.
Immediately following collection, samples for field analysis shall be tested in accordance with
the field instrument manufacturer’s instructions and results recorded on the Effluent Sampling
Field Log Sheet.
The field instrument(s) listed in Table 7.15 will be used to analyze the following constituents:
Table 7.15 Field Instruments
Field Instrument
(Manufacturer and Model) Constituent
pH
Turbidity
The manufacturers’ instructions are included in Appendix R “Field Meter Instructions”. Field
sampling staff shall review the instructions prior to each sampling event and follow the
instructions in completing measurement of the samples.
· The instrument(s) shall be maintained in accordance with manufacturer’s
instructions.
· The instrument(s) shall be calibrated before each sampling and analysis event.
· Maintenance and calibration records shall be maintained with the SWPPP.
The QSP may authorize alternate equipment provided that the equipment meets the
Construction General Permit’s requirements and the manufacturers’ instructions for calibration
and use are added to Appendix R “Field Meter Instructions”.
7.7.2.7 Data Evaluation and Reporting
Immediately upon completing the measurements for the sampling event, provide the Effluent
Sampling Field Log Sheets to the QSP for evaluation.
Numeric Action Levels
This project is subject to NALs for pH and turbidity (Table 7.16). Compliance with the NAL for
pH and turbidity is based on a weighted daily average. Upon receiving the field log sheets, the
QSP shall immediately calculate the weighted arithmetic average of the turbidity samples, and
the weighted logarithmic average of the pH samples to determine if the NALs, shown in the
table below, have been exceeded.
Table 7.16 Numeric Action Levels
Parameter Unit Daily Average
pH pH units Lower NAL = 6.5
Upper NAL = 8.5
Turbidity NTU 250 NTU
The QSP shall within 2 days of the sample collection submit copies of the completed Effluent
Sampling Field Log Sheets to the Approved Signatory.
CASQA SWPPP Template 62 December 2019
In the event that the pH or turbidity NAL is exceeded, the QSP shall immediately notify the
Approved Signatory and investigate the cause of the exceedance and identify corrective actions.
Exceedances of NALs shall be electronically reported to the State Water Board by the Approved
Signatory through the SMARTs system within 10 days of the conclusion of the storm event. If
requested by the Regional Board, a NAL Exceedance report will be submitted. The NAL
Exceedance Report must contain the following information:
· Analytical method(s), method reporting unit(s), and MDL(s) of each parameter;
· Date, place, time of sampling, visual observation, and/or measurements,
including precipitation; and
· Description of the current BMPs associated with the sample that exceeded the
NAL and the proposed corrective actions taken.
Receiving Water Monitoring Triggers
This project is not subject to Receiving Water Monitoring Triggers because it does not have a
direct discharge to the receiving water.
7.7.3 Sampling and Analysis Plan for pH, Turbidity, and SSC in Receiving
Water
This project is not subject to Receiving Water Monitoring.
7.7.4 Sampling and Analysis Plan for Non-Stormwater Discharges
This Sampling and Analysis Plan for non-stormwater discharges describes the sampling and
analysis strategy and schedule for monitoring pollutants in authorized and unauthorized
non-stormwater discharges from the project site in accordance with the requirements of the
Construction General Permit.
Sampling of non-stormwater discharges will be conducted when an authorized or unauthorized
non-stormwater discharge is observed discharging from the project site. In the event that
non-stormwater discharges run-on to the project site from offsite locations, and this run-on has
the potential to contribute to a violation of a NAL, the run-on will also be sampled.
The following authorized non-stormwater discharges identified in Section 2.7, have the
potential to be discharged from the project site.
· irrigation of vegetative erosion control measures
· water to control construction dust
· de-chlorinated potable water sources
In addition to the above authorized stormwater discharges, some construction activities have
the potential to result in an unplanned (unauthorized) non-stormwater discharge if BMPs fail.
These activities include:
· concrete curing
· dust control for grading
· washing/rinsing tools
CASQA SWPPP Template 63 December 2019
7.7.4.1 Sampling Schedule
Samples of authorized or unauthorized non-stormwater discharges shall be collected when they
are observed.
7.7.4.2 Sampling Locations
Samples shall be collected from the discharge point of the construction site where the
non-stormwater discharge is running off the project site. Site discharge locations are shown on
the Site Maps in SWPPP Appendix B and include the locations identified below.
Sampling location(s) on the project site and the contractor’s yard shall be identified by on-site
QSP or Contractor where non-stormwater discharges may runoff from the project site. (Table
7.20)
Table 7.20 Non-stormwater Discharge Sample Locations
Potential Sampling Location Latitude Longitude
CASQA SWPPP Template 64 December 2019
Sampling locations shall be identified for the collection of non-stormwater discharges that
run-on to the project site. Locations shall be identified on Table 7.21 by on-site QSP or
contractor.
Table 7.21 Non-stormwater Run-on Sample Locations
Potential Sampling Location Latitude Longitude
CASQA SWPPP Template 65 December 2019
7.7.4.3 Monitoring Preparation
Non-stormwater discharge samples will be collected by:
YES NO
Contractor
Laboratory Courier
Shipped
Please provide the contact information below:
Company Name:
Street Address:
City, State Zip:
Telephone
Number:
Point of Contact:
An adequate stock of monitoring supplies and equipment for monitoring non-stormwater
discharges will be available on the project site. Monitoring supplies and equipment will be
stored in a cool temperature environment that will not come into contact with rain or direct
sunlight. Personnel trained in sampling will be available to collect samples in accordance with
the sampling schedule. Supplies maintained at the project site will include, but are not limited
to, clean powder-free nitrile gloves, sample collection equipment, field meters, coolers,
appropriate number and volume of sample bottles, identification labels, re-sealable storage
bags, paper towels, personal rain gear, ice, and Effluent Sampling Field Log Sheets and CoC
forms provided in Appendix Q “Example Forms”.
The QSP or his/her designee will contact the laboratory or environmental consultant, 24 hours
prior to a planned non-stormwater discharge or as soon as an unplanned non-stormwater
discharge is observed to ensure that adequate sample collection personnel, supplies for
non-stormwater discharge monitoring are available and will be mobilized to collect samples on
the project site in accordance with the sampling schedule.
7.7.4.4 Analytical Constituents
All non-stormwater discharges that flow through a disturbed area shall, at minimum, be
monitored for turbidity.
All non-stormwater discharges that flow through an area where they are exposed to pH altering
materials shall be monitored for pH.
The QSP shall identify additional pollutants to be monitored for each non-stormwater discharge
incident based on the source of the non-stormwater discharge. If the source of an unauthorized
CASQA SWPPP Template 66 December 2019
non-stormwater discharge is not known, monitoring for pH, turbidity, MBAS, TOC, and residual
chlorine or chloramines is recommended to help identify the source of the discharge.
Non-stormwater discharge run-on shall be monitored, at minimum, for pH and turbidity. The
QSP shall identify additional pollutants to be monitored for each non-stormwater discharge
incident based on the source of the non-stormwater discharge. If the source of an unauthorized
non-stormwater discharge is not known, monitoring for pH, turbidity, MBAS, TOC, and residual
chlorine or chloramines is recommended to help identify the source of the discharge.
Table 7.22 lists the specific sources and types of potential non-visible pollutants on the project
site and the water quality indicator constituent(s) for that pollutant.
Table 7.22 Potential Non-Stormwater Discharge Pollutants and Water
Quality Indicator Constituents
Pollutant Source Pollutant Water Quality Indicator
Constituent
Disturbed Areas Sediment Turbidity
Concrete Work pH pH
7.7.4.5 Sample Collection
Samples shall be collected at the discharge locations where the non-stormwater discharge is
leaving the project site. Potential discharge locations are shown on the Site Maps in Appendix
B and identified in Section 7.7.4.2.
Grab samples shall be collected and preserved in accordance with the methods identified in
Table 7.23. Only personnel trained in water quality sampling under the direction of the QSP
shall collect samples.
Sample collection and handling requirements are described in Section 7.7.7.
7.7.4.6 Sample Analysis
Samples shall be analyzed using the analytical methods identified in Table 7.23.
7.7.4.7 Data Evaluation and Reporting
The QSP shall complete an evaluation of the water quality sample analytical results.
Turbidity and pH results shall be evaluated for compliance with NALs as identified in Section
7.7.2.7.
Runoff results shall also be evaluated for the constituents suspected in the non-stormwater
discharge. Should the runoff sample indicate the discharge of a pollutant which cannot be
explained by run-on results, the BMPs, site conditions, and surrounding influences shall be
assessed to determine the probable cause for the increase.
CASQA SWPPP Template 67 December 2019
As determined by the site and data evaluation, appropriate BMPs shall be repaired or modified
to mitigate discharges of non-visible pollutant concentrations. Any revisions to the BMPs shall
be recorded as an amendment to the SWPPP.
Non-storm water discharge results shall be submitted with the Annual Report.
The General Permit prohibits the non-storm water discharges that contain hazardous
substances equal to or in excess of reportable quantities established in 40 C.F.R. §§ 117.3 and
302.4. The results of any non-stormwater discharge results that indicate the presence of a
hazardous substance in excess of established reportable quantities shall be immediately
reported to the Regional Water Board.
CASQA SWPPP Template 68 December 2019 Table 7.23 Sample Collection, Preservation and Analysis for Monitoring Pollutants in Non-Stormwater Discharges Constituent Analytical Method Minimum Sample Volume Sample Bottle Sample Preservation Reporting Limit Maximum Holding Time Notes:
CASQA SWPPP Template 69 December 2019
7.7.5 Sampling and Analysis Plan for Other Pollutants Required by the
Regional Water Board
The Regional Water Board has not specified monitoring for additional pollutants.
7.7.6 Training of Sampling Personnel
Sampling personnel shall be trained to collect, maintain, and ship samples in accordance with
the Surface Water Ambient Monitoring program (SWAMP) 2008 Quality Assurance Program
Plan (QAPrP). Training records of designated contractor sampling personnel are provided in
Appendix K.
7.7.7 Sample Collection and Handling
7.7.7.1 Sample Collection
Samples shall be collected at the designated sampling locations shown on the Site Maps and
listed in the preceding sections. Samples shall be collected, maintained and shipped in
accordance with the SWAMP 2008 Quality Assurance Program Plan (QAPrP).
Grab samples shall be collected and preserved in accordance with the methods identified in
preceding sections.
To maintain sample integrity and prevent cross-contamination, sample collection personnel
shall follow the protocols below.
· Collect samples (for laboratory analysis) only in analytical laboratory-provided
sample containers;
· Wear clean, powder-free nitrile gloves when collecting samples;
· Change gloves whenever something not known to be clean has been touched;
· Change gloves between sites;
· Decontaminate all equipment (e.g., bucket, tubing) prior to sample collection
using a trisodium phosphate water wash, distilled water rinse, and final rinse
with distilled water. (Dispose of wash and rinse water appropriately [i.e., do not
discharge to storm drain or receiving water]). Do not decontaminate laboratory
provided sample containers;
· Do not smoke during sampling events;
· Never sample near a running vehicle;
· Do not park vehicles in the immediate sample collection area (even non-running
vehicles);
· Do not eat or drink during sample collection; and
· Do not breathe, sneeze, or cough in the direction of an open sample container.
The most important aspect of grab sampling is to collect a sample that represents the entire
runoff stream. Typically, samples are collected by dipping the collection container in the runoff
flow paths and streams as noted below.
i. For small streams and flow paths, simply dip the bottle facing upstream until full.
ii. For larger stream that can be safely accessed, collect a sample in the middle of the
flow stream by directly dipping the mouth of the bottle. Once again making sure
that the opening of the bottle is facing upstream as to avoid any contamination by
the sampler.
iii. For larger streams that cannot be safely waded, pole-samplers may be needed to
safely access the representative flow.
iv. Avoid collecting samples from ponded, sluggish or stagnant water.
CASQA SWPPP Template 70 December 2019
v. Avoid collecting samples directly downstream from a bridge as the samples can
be affected by the bridge structure or runoff from the road surface.
Note, that depending upon the specific analytical test, some containers may contain
preservatives. These containers should never be dipped into the stream but filled indirectly
from the collection container.
7.7.7.2 Sample Handling
Turbidity and pH measurements must be conducted immediately. Do not store turbidity or pH
samples for later measurement.
Samples for laboratory analysis must be handled as follows. Immediately following sample
collection:
· Cap sample containers;
· Complete sample container labels;
· Sealed containers in a re-sealable storage bag;
· Place sample containers into an ice-chilled cooler;
· Document sample information on the Effluent Sampling Field Log Sheet; and
· Complete the CoC.
All samples for laboratory analysis must be maintained between 0-6 degrees Celsius during
delivery to the laboratory. Samples must be kept on ice, or refrigerated, from sample collection
through delivery to the laboratory. Place samples to be shipped inside coolers with ice. Make
sure the sample bottles are well packaged to prevent breakage and secure cooler lids with
packaging tape.
Ship samples that will be laboratory analyzed to the analytical laboratory right away. Hold times
are measured from the time the sample is collected to the time the sample is analyzed. The
General Permit requires that samples be received by the analytical laboratory within 48 hours
of the physical sampling (unless required sooner by the analytical laboratory).
Laboratory Name:
Address:
City, State Zip:
Telephone
Number:
Point of Contact:
7.7.7.3 Sample Documentation Procedures
All original data documented on sample bottle identification labels, Effluent Sampling Field Log
Sheet, and CoCs shall be recorded using waterproof ink. These shall be considered accountable
documents. If an error is made on an accountable document, the individual shall make
corrections by lining through the error and entering the correct information. The erroneous
information shall not be obliterated. All corrections shall be initialed and dated.
Duplicate samples shall be identified consistent with the numbering system for other samples to
prevent the laboratory from identifying duplicate samples. Duplicate samples shall be identified
in the Effluent Sampling Field Log Sheet.
Sample documentation procedures include the following:
CASQA SWPPP Template 71 December 2019
Sample Bottle Identification Labels: Sampling personnel shall attach an identification label to
each sample bottle. Sample identification shall uniquely identify each sample location.
Field Log Sheets: Sampling personnel shall complete the Effluent Sampling Field Log Sheet and
Receiving Water Sampling Field Log Sheet for each sampling event, as appropriate.
Chain of Custody: Sampling personnel shall complete the CoC for each sampling event for which
samples are collected for laboratory analysis. The sampler will sign the CoC when the sample(s)
is turned over to the testing laboratory or courier.
7.8 ACTIVE TREATMENT SYSTEM MONITORING
This project does not require a project specific Sampling and Analysis Plan for an ATS because
deployment of an ATS is not planned.
7.9 BIOASSESSMENT MONITORING
This project is not subject to bioassessment monitoring because it is not a Risk Level 3 project.
7.10 WATERSHED MONITORING OPTION
This project is not participating in a watershed monitoring option.
7.11 QUALITY ASSURANCE AND QUALITY CONTROL
An effective Quality Assurance and Quality Control (QA/QC) plan shall be implemented as part
of the CSMP to ensure that analytical data can be used with confidence. QA/QC procedures to
be initiated include the following:
· Field logs;
· Clean sampling techniques;
· CoCs;
· QA/QC Samples; and
· Data verification.
Each of these procedures is discussed in more detail in the following sections.
7.11.1 Field Logs
The purpose of field logs is to record sampling information and field observations during
monitoring that may explain any uncharacteristic analytical results. Sampling information to be
included in the field log include the date and time of water quality sample collection, sampling
personnel, sample container identification numbers, and types of samples that were collected.
Field observations should be noted in the field log for any abnormalities at the sampling location
(color, odor, BMPs, etc.). Field measurements for pH and turbidity should also be recorded in
the field log. A Visual Inspection Field Log, an Effluent Sampling Field Log Sheet, are included
in Appendix Q “Example Forms”.
7.11.2 Clean Sampling Techniques
Clean sampling techniques involve the use of certified clean containers for sample collection and
clean powder-free nitrile gloves during sample collection and handling. As discussed in
Section 7.7.7, adoption of a clean sampling approach will minimize the chance of field
contamination and questionable data results.
CASQA SWPPP Template 72 December 2019
7.11.3 Chain of Custody
The sample CoC is an important documentation step that tracks samples from collection
through analysis to ensure the validity of the sample. Sample CoC procedures include the
following:
· Proper labeling of samples;
· Use of CoC forms for all samples; and
· Prompt sample delivery to the analytical laboratory.
Analytical laboratories usually provide CoC forms to be filled out for sample containers. An
example CoC is included in Appendix Q “Example Forms”.
7.11.4 QA/QC Samples
QA/QC samples provide an indication of the accuracy and precision of the sample collection;
sample handling; field measurements; and analytical laboratory methods. Project specific
sampling design information may be found in the QAPrP
7.11.4.1 Field Duplicates
Field duplicates provide verification of laboratory or field analysis and sample collection.
Duplicate samples shall be collected, handled, and analyzed using the same protocols as primary
samples. The sample location where field duplicates are collected shall be randomly selected
from the discharge locations. Duplicate samples shall be collected immediately after the
primary sample has been collected. Duplicate samples must be collected in the same manner
and as close in time as possible to the original sample. Duplicate samples shall not influence
any evaluations or conclusion.
7.11.4.2 Equipment Blanks
Equipment blanks provide verification that equipment has not introduced a pollutant into the
sample. Equipment blanks are typically collected when:
· New equipment is used;
· Equipment that has been cleaned after use at a contaminated site;
· Equipment that is not dedicated for surface water sampling is used; or
· Whenever a new lot of filters is used when sampling metals.
7.11.4.3 Field Blanks
Field blanks assess potential sample contamination levels that occur during field sampling
activities. De-ionized water field blanks are taken to the field, transferred to the appropriate
container, and treated the same as the corresponding sample type during the course of a
sampling event.
7.11.4.4 Travel Blanks
Travel blanks assess the potential for cross-contamination of volatile constituents between
sample containers during shipment from the field to the laboratory. De-ionized water blanks
are taken along for the trip and held unopened in the same cooler with the VOC samples.
7.11.5 Data Verification
After results are received from the analytical laboratory, the QSP shall verify the data to ensure
that it is complete, accurate, and the appropriate QA/QC requirements were met. Data must be
verified as soon as the data reports are received. Data verification shall include:
CASQA SWPPP Template 73 December 2019
· Check the CoC and laboratory reports.
Make sure all requested analyses were performed and all samples are accounted
for in the reports.
· Check laboratory reports to make sure hold times were met and that the reporting
levels meet or are lower than the reporting levels agreed to in the contract.
· Check data for outlier values and follow up with the laboratory.
Occasionally typographical errors, unit reporting errors, or incomplete results are
reported and should be easily detected. These errors need to be identified, clarified,
and corrected quickly by the laboratory. The QSP should especially note data that
is an order of magnitude or more different than similar locations or is inconsistent
with previous data from the same location.
· Check laboratory QA/QC results.
EPA establishes QA/QC checks and acceptable criteria for laboratory analyses.
These data are typically reported along with the sample results. The QSP shall
evaluate the reported QA/QC data to check for contamination (method, field, and
equipment blanks), precision (laboratory matrix spike duplicates), and accuracy
(matrix spikes and laboratory control samples). When QA/QC checks are outside
acceptable ranges, the laboratory must flag the data, and usually provides an
explanation of the potential impact to the sample results.
· Check the data set for outlier values and, accordingly, confirm results and re-analyze
samples where appropriate.
Sample re-analysis should only be undertaken when it appears that some part of
the QA/QC resulted in a value out of the accepted range. Sample results may not be
discounted unless the analytical laboratory identifies the required QA/QC criteria
were not met and confirms this in writing.
Field data including inspections and observations must be verified as soon as the field logs are
received, typically at the end of the sampling event. Field data verification shall include:
· Check field logs to make sure all required measurements were completed and
appropriately documented;
· Check reported values that appear out of the typical range or inconsistent;
Follow-up immediately to identify potential reporting or equipment
problems, if appropriate, recalibrate equipment after sampling;
· Verify equipment calibrations;
· Review observations noted on the field logs; and
· Review notations of any errors and actions taken to correct the equipment or
recording errors.
7.12 RECORDS RETENTION
All records of stormwater monitoring information and copies of reports (including Annual
Reports) must be retained for a period of at least three years from date of submittal or longer if
required by the Regional Water Board.
Results of visual monitoring, field measurements, and laboratory analyses must be kept in the
SWPPP along with CoCs, and other documentation related to the monitoring.
Records are to be kept onsite while construction is ongoing. Records to be retained include:
· The date, place, and time of inspections, sampling, visual observations, and/or
measurements, including precipitation;
· The individual(s) who performed the inspections, sampling, visual observation, and/or
field measurements;
CASQA SWPPP Template 74 December 2019
· The date and approximate time of field measurements and laboratory analyses;
· The individual(s) who performed the laboratory analyses;
· A summary of all analytical results, the method detection limits and reporting limits, and
the analytical techniques or methods used;
· Rain gauge readings from site inspections;
· QA/QC records and results;
· Calibration records;
· Visual observation and sample collection exemption records;
· The records of any corrective actions and follow-up activities that resulted from
analytical results, visual observations, or inspections; and NAL Exceedance Reports.
CASQA SWPPP Template 75 December 2019
Section 8 References
Improvement and Grading Plans For Aviara Apartments, drawing number No. 535-1,
Dated 5/9/2022 Prepared by SB&O, Inc.
Precise Grading Plans For Aviara Apartments West, drawing number No. 535-1A,
Dated 12/8/2022 Prepared by SB&O, Inc.
Geosoils, Inc (July 7, 2016). PRELIMINARY GEOTECHNICAL EVALUATION 9.2 ACRES, APN
212-040-56-00, LAUREL TREE LANE AT AVIARA PARKWAY, CARLSBAD, SAN DIEGO
COUNTY, CALIFORNIA.
GeoTek, Inc. (November 11, 2021). GEOTECHNICAL EVALUATION REPORT, PROPOSED
AVIARA APARTMENTS DEVELOPMENT, 6145 LAUREL TREE LANE, CARLSBAD,
CALIFORNIA 92009
State Water Resources Control Board (2009). Order 2009-0009-DWQ, NPDES General Permit
No. CAS000002: National Pollutant Discharges Elimination System (NPDES) California
General Permit for Storm Water Discharge Associated with Construction and Land Disturbing
Activities. Available online at:
http://www.waterboards.ca.gov/water_issues/programs/stormwater/construction.shtml.
State Water Resources Control Board (2010). Order 2010-0014-DWQ, NPDES General Permit
No. CAS000002: National Pollutant Discharges Elimination System (NPDES) California
General Permit for Storm Water Discharge Associated with Construction and Land Disturbing
Activities. Available online at:
http://www.waterboards.ca.gov/water_issues/programs/stormwater/construction.shtml.
State Water Resources Control Board (2012). Order 2012-0006-DWQ, NPDES General Permit
No. CAS000002: National Pollutant Discharges Elimination System (NPDES) California
General Permit for Storm Water Discharge Associated with Construction and Land Disturbing
Activities. Available online at:
http://www.waterboards.ca.gov/water_issues/programs/stormwater/construction.shtml.
CASQA (2019). Construction BMP Handbook. Available online at: www.casqa.org
CASQA SWPPP Template 76 December 2019
Appendix A: Construction General Permit
State Water Resources Control Board
Division of Water Quality
1001 I Street • Sacramento, California 95814 • (916) 341-5455
Mailing Address: P.O. Box 100 • Sacramento, California • 95812-0100
Fax (916) 341-5463 • http://www.waterboards.ca.gov
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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Linda S. Adams
Secretary for
Environmental Protection
Arnold Schwarzenegger
Governor
CONSTRUCTION GENERAL PERMIT FACT SHEET TABLE OF CONTENTS
I. BACKGROUND ..................................................................................................... 1
A. History .............................................................................................................................................................. 1
B. Legal Challenges and Court Decisions ........................................................................................................... 1
C. Blue Ribbon Panel of Experts and Feasibility of Numeric Effluent Limitations ....................................... 4
D. Summary of Panel Findings on Construction Activities .............................................................................. 4
E. How the Panel’s Findings are Used in this General Permit ......................................................................... 5
F. Summary of Significant Changes in This General Permit ........................................................................... 5
II. RATIONALE .......................................................................................................... 7
A. General Permit Approach ............................................................................................................................... 7
B. Construction Activities Covered ..................................................................................................................... 7
C. Construction Activities Not Covered ............................................................................................................. 9
D. Obtaining and Terminating Permit Coverage ............................................................................................ 12
E. Discharge Prohibitions .................................................................................................................................. 12
F. Effluent Standards for All Types of Discharges .......................................................................................... 13
G. Receiving Water Limitations ........................................................................................................................ 20
H. Training Qualifications and Requirements ................................................................................................. 20
I. Sampling, Monitoring, Reporting and Record Keeping ............................................................................. 21
J. Risk Determination ........................................................................................................................................ 27
K. ATS Requirements......................................................................................................................................... 35
L. Post-Construction Requirements ................................................................................................................. 37
M. Storm Water Pollution Prevention Plans .................................................................................................... 46
N. Regional Water Board Authorities............................................................................................................... 48
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LIST OF TABLES
Table 1 - Regional Water Board Basin Plans, Water Quality Objectives for Turbidity 16
Table 2 - Results of Ecoregion Analysis 16
Table 3 – ACL Sampling Data taken by Regional Water Board Staff 17
Table 4 - Required Monitoring Elements for Risk Levels 21
Table 5 - Storm Water Effluent Monitoring Requirements by Risk Level 23
Table 6 - Receiving Water Monitoring Requirements 26
Table 7 - Combined Risk Level Matrix 29
Table 8 -National Oceanic and Atmospheric Administration (NOAA) Definition of Probability of
Precipitation (PoP) 31
Table 9 - Qualified SWPPP Developer/ Qualified SWPPP Practitioner Certification Criteria 47
LIST OF FIGURES
Figure 1 -Statewide Map of K * LS 28
Figure 2 - Suite of Storm Events 37
Figure 3 - Northern CA (2009) Counties / Cities With SUSMP-Plus Coverage 39
Figure 4 - Southern CA (2009) Counties / Cities With SUSMP-Plus Coverage 40
Figure 5 - Schematic of the Lane Relationship 42
Figure 6 - Channel Changes Associated with Urbanization 43
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I. BACKGROUND
A. History
In 1972, the Federal Water Pollution Control Act (also referred to as the Clean Water Act [CWA]) was
amended to provide that the discharge of pollutants to waters of the United States from any point source
is unlawful unless the discharge is in compliance with a National Pollutant Discharge Elimination System
(NPDES) permit. The 1987 amendments to the CWA added Section 402(p), which establishes a
framework for regulating municipal and industrial storm water discharges under the NPDES Program. On
November 16, 1990, the U.S. Environmental Protection Agency (USEPA) published final regulations that
established storm water permit application requirements for specified categories of industries. The
regulations provide that discharges of storm water to waters of the United States from construction
projects that encompass five or more acres of soil disturbance are effectively prohibited unless the
discharge is in compliance with an NPDES Permit. Regulations (Phase II Rule) that became final on
December 8, 1999 lowered the permitting threshold from five acres to one acre.
While federal regulations allow two permitting options for storm water discharges (Individual Permits and
General Permits), the State Water Board has elected to adopt only one statewide General Permit at this
time that will apply to most storm water discharges associated with construction activity.
On August 19, 1999, the State Water Board reissued the General Construction Storm Water Permit
(Water Quality Order 99-08-DWQ). On December 8, 1999 the State Water Board amended Order 99-08-
DWQ to apply to sites as small as one acre.
The General Permit accompanying this fact sheet regulates storm water runoff from construction sites.
Regulating many storm water discharges under one permit will greatly reduce the administrative burden
associated with permitting individual storm water discharges. To obtain coverage under this General
Permit, dischargers shall electronically file the Permit Registration Documents (PRDs), which includes a
Notice of Intent (NOI), Storm Water Pollution Prevention Plan (SWPPP), and other compliance related
documents required by this General Permit and mail the appropriate permit fee to the State Water Board.
It is expected that as the storm water program develops, the Regional Water Quality Control Boards
(Regional Water Boards) may issue General Permits or Individual Permits containing more specific permit
provisions. When this occurs, this General Permit will no longer regulate those dischargers.
B. Legal Challenges and Court Decisions
1. Early Court Decisions
Shortly after the passage of the CWA, the USEPA promulgated regulations exempting most storm water
discharges from the NPDES permit requirements. (See 40 C.F.R. § 125.4 (1975); see also Natural
Resources Defense Council v. Costle (D.C. Cir. 1977) 568 F.2d 1369, 1372 (Costle); Defenders of
Wildlife v. Browner (9th Cir. 1999) 191 F.3d 1159, 1163 (Defenders of Wildlife).) When environmental
groups challenged this exemption in federal court, the District of Columbia Court of Appeals invalidated
the regulation, holding that the USEPA “does not have authority to exempt categories of point sources
from the permit requirements of [CWA] § 402.” (Costle, 568 F.2d at 1377.) The Costle court rejected the
USEPA's argument that effluent-based storm sewer regulation was administratively infeasible because of
the variable nature of storm water pollution and the number of affected storm sewers throughout the
country. (Id. at 1377-82.) Although the court acknowledged the practical problems relating to storm sewer
regulation, the court found the USEPA had the flexibility under the CWA to design regulations that would
overcome these problems. (Id. at 1379-83.) In particular, the court pointed to general permits and permits
based on requiring best management practices (BMPs).
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During the next 15 years, the USEPA made numerous attempts to reconcile the statutory requirement of
point source regulation with the practical problem of regulating possibly millions of diverse point source
discharges of storm water. (See Defenders of Wildlife, 191 F.3d at 1163; see also Gallagher, Clean Water
Act in Environmental Law Handbook (Sullivan, edit., 2003)
p. 300 (Environmental Law Handbook); Eisen, Toward a Sustainable Urbanism: Lessons from Federal
Regulation of Urban Storm Water Runoff (1995) 48 Wash. U.J. Urb. & Contemp. L.1, 40-41 [Regulation of
Urban Storm Water Runoff].)
In 1987, Congress amended the CWA to require NPDES permits for storm water discharges. (See CWA
§ 402(p), 33 U.S.C. § 1342(p); Defenders of Wildlife, 191 F.3d at 1163; Natural Resources Defense
Council v. USEPA (9th Cir. 1992) 966 F.2d 1292, 1296.) In these amendments, enacted as part of the
Water Quality Act of 1987, Congress distinguished between industrial and municipal storm water
discharges. With respect to industrial storm water discharges, Congress provided that NPDES permits
"shall meet all applicable provisions of this section and section 1311 [requiring the USEPA to establish
effluent limitations under specific timetables]." (CWA § 402(p)(3)(A), 33 U.S.C. § 1342(p)(3)(A); see also
Defenders of Wildlife, 191 F.3d at 1163-64.)
In 1990, USEPA adopted regulations specifying what activities were considered “industrial” and thus
required discharges of storm water associated with those activities to obtain coverage under NPDES
permits. (55 Fed. Reg. 47,990 (1990); 40 C.F.R. § 122.26(b)(14).) Construction activities, deemed a
subset of the industrial activities category, must also be regulated by an NPDES permit. (40 C.F.R. §
122.26(b)(14)(x)). In 1999, USEPA issued regulations for “Phase II” of storm water regulation, which
required most small construction sites (1-5 acres) to be regulated under the NPDES program. (64 Fed.
Reg. 68,722; 40 C.F.R. § 122.26(b)(15)(i).)
2. Court Decisions on Public Participation
Two recent federal court opinions have vacated USEPA rules that denied meaningful public review of
NPDES permit conditions. On January 14, 2003, the Ninth Circuit Court of Appeals held that certain
aspects of USEPA’s Phase II regulations governing MS4s were invalid primarily because the general
permit did not contain express requirements for public participation. (Environmental Defense Center v.
USEPA (9th Cir. 2003) 344 F.3d 832.) Specifically, the court determined that applications for general
permit coverage (including the Notice of Intent (NOI) and Storm Water Management Program (SWMP))
must be made available to the public, the applications must be reviewed and determined to meet the
applicable standard by the permitting authority before coverage commences, and there must be a
process to accommodate public hearings. (Id. at 852-54.) Similarly, on February 28, 2005, the Second
Circuit Court of Appeals held that the USEPA's confined animal feeding operation (CAFO) rule violated
the CWA because it allowed dischargers to write their own nutrient management plans without public
review. (Waterkeeper Alliance v. USEPA (2d Cir. 2005) 399 F.3d 486.) Although neither decision
involved the issuance of construction storm water permits, the State Water Board’s Office of Chief
Counsel has recommended that the new General Permit address the courts’ rulings where feasible1.
1 In Texas Independent Producers and Royalty Owners Assn. v. USEPA (7th Cir. 2005) 410 F.3d 964, the Seventh
Circuit Court of Appeals held that the USEPA’s construction general permit was not required to provide the public
with the opportunity for a public hearing on the Notice of Intent or Storm Water Pollution Prevention Plan. The
Seventh Circuit briefly discussed why it agreed with the Ninth Circuit’s dissent in Environmental Defense Center, but
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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The CWA and the USEPA’s regulations provide states with the discretion to formulate permit terms,
including specifying best management practices (BMPs), to achieve strict compliance with federal
technology-based and water quality-based standards. (Natural Resources Defense Council v. USEPA
(9th Cir. 1992) 966 F.2d 1292, 1308.) Accordingly, this General Permit has developed specific BMPs as
well as numeric action levels (NALs) in order to achieve these minimum federal standards. In addition,
the General Permit requires a SWPPP and REAP (another dynamic, site-specific plan) to be developed
but has removed all language requiring the discharger to implement these plans – instead, the discharger
is required to comply with specific requirements. By requiring the dischargers to implement these specific
BMPs and NALs, this General Permit ensures that the dischargers do not “write their own permits.” As a
result this General Permit does not require each discharger’s SWPPP and REAP to be reviewed and
approved by the Regional Water Boards.
This General Permit also requires dischargers to electronically file all permit-related compliance
documents. These documents include, but are not limited to, NOIs, SWPPPs, annual reports, Notice of
Terminations (NOTs), and numeric action level (NAL) exceedance reports. Electronically submitted
compliance information is immediately available to the public, as well as the Regional Water Quality
Control Board (Regional Water Board) offices, via the Internet. In addition, this General Permit enables
public review and hearings on permit applications when appropriate. Under this General Permit, the
public clearly has a meaningful opportunity to participate in the permitting process.
generally did not discuss the substantive holdings in Environmental Defense Center and Waterkeeper Alliance,
because neither court addressed the initial question of whether the plaintiffs had standing to challenge the permits at
issue. However, notwithstanding the Seventh Circuit’s decision, it is not binding or controlling on the State Water
Board because California is located within the Ninth Circuit.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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C. Blue Ribbon Panel of Experts and Feasibility of Numeric Effluent
Limitations
In 2005 and 2006, the State Water Board convened an expert panel (panel) to address the feasibility of
numeric effluent limitations (NELs) in California’s storm water permits. Specifically, the panel was asked
to address:
“Is it technically feasible to establish numeric effluent limitations, or some other quantifiable limit, for
inclusion in storm water permits? How would such limitations or criteria be established, and what
information and data would be required?”
“The answers should address industrial general permits, construction general permits, and area-wide
municipal permits. The answers should also address both technology-based limitations or criteria and
water quality-based limitations or criteria. In evaluating establishment of any objective criteria, the panel
should address all of the following:
The ability of the State Water Board to establish appropriate objective limitations or criteria;
How compliance determinations would be made;
The ability of dischargers and inspectors to monitor for compliance; and
The technical and financial ability of dischargers to comply with the limitations or criteria.”
Through a series of public participation processes (State Water Board meetings, State Water Board
workshops, and the solicitation of written comments), a number of water quality, public process and
overall program effectiveness problems were identified. Some of these problems are addressed through
this General Permit.
D. Summary of Panel Findings on Construction Activities
The panel’s final report can be downloaded and viewed through links at www.waterboards.ca.gov or by
clicking here2.
The panel made the following observations:
“Limited field studies indicate that traditional erosion and sediment controls are highly variable in
performance, resulting in highly variable turbidity levels in the site discharge.”
“Site-to-site variability in runoff turbidity from undeveloped sites can also be quite large in many areas of
California, particularly in more arid regions with less natural vegetative cover and steep slopes.”
2 http://www.waterboards.ca.gov/stormwtr/docs/numeric/swpanel_final_report.pdf
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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“Active treatment technologies involving the use of polymers with relatively large storage systems now
exist that can provide much more consistent and very low discharge turbidity. However, these
technologies have as yet only been applied to larger construction sites, generally five acres or greater.
Furthermore, toxicity has been observed at some locations, although at the vast majority of sites, toxicity
has not occurred. There is also the potential for an accidental large release of such chemicals with their
use.”
“To date most of the construction permits have focused on TSS and turbidity, but have not addressed
other, potentially significant pollutants such as phosphorus and an assortment of chemicals used at
construction sites.”
“Currently, there is no required training or certification program for contractors, preparers of soil erosion
and sediment control Storm Water Pollution Prevention Plans, or field inspectors.”
“The quality of storm water discharges from construction sites that effectively employ BMPs likely varies
due to site conditions such as climate, soil, and topography.”
“The States of Oregon and Washington have recently adopted similar concepts to the Action Levels
described earlier.”
In addition, the panel made the following conclusions:
“It is the consensus of the Panel that active treatment technologies make Numeric Limits technically
feasible for pollutants commonly associated with storm water discharges from construction sites (e.g. TSS
and turbidity) for larger construction sites. Technical practicalities and cost-effectiveness may make these
technologies less feasible for smaller sites, including small drainages within a larger site, as these
technologies have seen limited use at small construction sites. If chemical addition is not permitted, then
Numeric Limits are not likely feasible.”
“The Board should consider Numeric Limits or Action Levels for other pollutants of relevance to
construction sites, but in particular pH. It is of particular concern where fresh concrete or wash water from
cement mixers/equipment is exposed to storm water.”
“The Board should consider the phased implementation of Numeric Limits and Action Levels,
commensurate with the capacity of the dischargers and support industry to respond.”
E. How the Panel’s Findings are Used in this General Permit
The State Water Board carefully considered the findings of the panel and related public comments. The
State Water Board also reviewed and considered the comments regarding statewide storm water policy
and the reissuance of the Industrial General Permit. From the input received the State Water Board
identified some permit and program performance gaps that are addressed in this General Permit. The
Summary of Significant Changes (below) in this General Permit are a direct result of this process.
F. Summary of Significant Changes in This General Permit
The State Water Board has significant changes to Order 99-08-DWQ. This General Permit differs from
Order 99-08-DWQ in the following significant ways:
Rainfall Erosivity Waiver: this General Permit includes the option allowing a small construction site (>1
and <5 acres) to self-certify if the rainfall erosivity value (R value) for their site's given location and time
frame compute to be less than or equal to 5.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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Technology-Based Numeric Action Levels: this General Permit includes NALs for pH and turbidity.
Risk-Based Permitting Approach: this General Permit establishes three levels of risk possible for a
construction site. Risk is calculated in two parts: 1) Project Sediment Risk, and 2) Receiving Water Risk.
Minimum Requirements Specified: this General Permit imposes more minimum BMPs and
requirements that were previously only required as elements of the SWPPP or were suggested by
guidance.
Project Site Soil Characteristics Monitoring and Reporting: this General Permit provides the option
for dischargers to monitor and report the soil characteristics at their project location. The primary purpose
of this requirement is to provide better risk determination and eventually better program evaluation.
Effluent Monitoring and Reporting: this General Permit requires effluent monitoring and reporting for
pH and turbidity in storm water discharges. The purpose of this monitoring is to evaluate whether NALs
and NELs for Active Treatment Systems included in this General Permit are exceeded.
Receiving Water Monitoring and Reporting: this General Permit requires some Risk Level 3 and LUP
Type 3 dischargers to monitor receiving waters and conduct bioassessments.
Post-Construction Storm Water Performance Standards: this General Permit specifies runoff
reduction requirements for all sites not covered by a Phase I or Phase II MS4 NPDES permit, to avoid,
minimize and/or mitigate post-construction storm water runoff impacts.
Rain Event Action Plan: this General Permit requires certain sites to develop and implement a Rain
Event Action Plan (REAP) that must be designed to protect all exposed portions of the site within 48
hours prior to any likely precipitation event.
Annual Reporting: this General Permit requires all projects that are enrolled for more than one
continuous three-month period to submit information and annually certify that their site is in compliance
with these requirements. The primary purpose of this requirement is to provide information needed for
overall program evaluation and pubic information.
Certification/Training Requirements for Key Project Personnel: this General Permit requires that key
personnel (e.g., SWPPP preparers, inspectors, etc.) have specific training or certifications to ensure their
level of knowledge and skills are adequate to ensure their ability to design and evaluate project
specifications that will comply with General Permit requirements.
Linear Underground/Overhead Projects: this General Permit includes requirements for all Linear
Underground/Overhead Projects (LUPs).
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II. RATIONALE
A. General Permit Approach
A general permit for construction activities is an appropriate permitting approach for the following
reasons:
1. A general permit is an efficient method to establish the essential regulatory requirements for
a broad range of construction activities under differing site conditions;
2. A general permit is the most efficient method to handle the large number of construction
storm water permit applications;
3. The application process for coverage under a general permit is far less onerous than that for
individual permit and hence more cost effective;
4. A general permit is consistent with USEPA's four-tier permitting strategy, the purpose of
which is to use the flexibility provided by the CWA in designing a workable and efficient
permitting system; and
5. A general permit is designed to provide coverage for a group of related facilities or operations
of a specific industry type or group of industries. It is appropriate when the discharge
characteristics are sufficiently similar, and a standard set of permit requirements can
effectively provide environmental protection and comply with water quality standards for
discharges. In most cases, the general permit will provide sufficient and appropriate
management requirements to protect the quality of receiving waters from discharges of storm
water from construction sites.
There may be instances where a general permit is not appropriate for a specific construction project. A
Regional Water Board may require any discharger otherwise covered under the General Permit to apply
for and obtain an Individual Permit or apply for coverage under a more specific General Permit. The
Regional Water Board must determine that this General Permit does not provide adequate assurance that
water quality will be protected, or that there is a site-specific reason why an individual permit should be
required.
B. Construction Activities Covered
1. Construction activity subject to this General Permit:
Any construction or demolition activity, including, but not limited to, clearing, grading, grubbing, or
excavation, or any other activity that results in a land disturbance of equal to or greater than one acre.
Construction activity that results in land surface disturbances of less than one acre if the construction
activity is part of a larger common plan of development or sale of one or more acres of disturbed land
surface.
Construction activity related to residential, commercial, or industrial development on lands currently used
for agriculture including, but not limited to, the construction of buildings related to agriculture that are
considered industrial pursuant to USEPA regulations, such as dairy barns or food processing facilities.
Construction activity associated with LUPs including, but not limited to, those activities necessary for the
installation of underground and overhead linear facilities (e.g., conduits, substructures, pipelines, towers,
poles, cables, wires, connectors, switching, regulating and transforming equipment and associated
ancillary facilities) and include, but are not limited to, underground utility mark-out, potholing, concrete
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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and asphalt cutting and removal, trenching, excavation, boring and drilling, access road and pole/tower
pad and cable/wire pull station, substation construction, substructure installation, construction of tower
footings and/or foundations, pole and tower installations, pipeline installations, welding, concrete and/or
pavement repair or replacement, and stockpile/borrow locations.
Discharges of sediment from construction activities associated with oil and gas exploration, production,
processing, or treatment operations or transmission facilities.3
Storm water discharges from dredge spoil placement that occur outside of U.S. Army Corps of Engineers
jurisdiction4 (upland sites) and that disturb one or more acres of land surface from construction activity are
covered by this General Permit. Construction projects that intend to disturb one or more acres of land
within the jurisdictional boundaries of a CWA § 404 permit should contact the appropriate Regional Water
Board to determine whether this permit applies to the project.
2. Linear Underground/Overhead Projects (LUPs) subject to this General Permit:
Underground/overhead facilities typically constructed as LUPs include, but are not limited to, any
conveyance, pipe, or pipeline for the transportation of any gaseous, liquid (including water, wastewater for
domestic municipal services), liquescent, or slurry substance; any cable line or wire for the transmission
of electrical energy; any cable line or wire for communications (e.g., telephone, telegraph, radio or
television messages); and associated ancillary facilities. Construction activities associated with LUPs
include, but are not limited to, those activities necessary for the installation of underground and overhead
linear facilities (e.g., conduits, substructures, pipelines, towers, poles, cables, wires, connectors,
switching, regulating and transforming equipment and associated ancillary facilities) and include, but are
not limited to, underground utility mark-out, potholing, concrete and asphalt cutting and removal,
trenching, excavation, boring and drilling, access road and pole/tower pad and cable/wire pull station,
substation construction, substructure installation, construction of tower footings and/or foundations, pole
and tower installations, pipeline installations, welding, concrete and/or pavement repair or replacement,
and stockpile/borrow locations.
Water Quality Order 2003-0007-DWQ regulated construction activities associated with small LUPs that
resulted in land disturbances greater than one acre, but less than five acres. These projects were
considered non-traditional construction projects. Attachment A of this Order now regulates all
construction activities from LUPs resulting in land disturbances greater than one acre.
3. Common Plan of Development or Sale
USEPA regulations include the term “common plan of development or sale” to ensure that acreage within
a common project does not artificially escape the permit requirements because construction activities are
phased, split among smaller parcels, or completed by different owners/developers. In the absence of an
3 Pursuant to the Ninth Circuit Court of Appeals’ decision in NRDC v. EPA (9th Cir. 2008) 526 F.3d 591, and
subsequent denial of the USEPA’s petition for reconsideration in November 2008, oil and gas construction activities
discharging storm water contaminated only with sediment are no longer exempt from the NPDES program. 4 A construction site that includes a dredge and/or fill discharge to any water of the United States (e.g., wetland,
channel, pond, or marine water) requires a CWA Section 404 permit from the U.S. Army Corps of Engineers and a
CWA Section 401 Water Quality Certification from the Regional Water Board or State Water Board.
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exact definition of “common plan of development or sale,” the State Water Board is required to exercise
its regulatory discretion in providing a common sense interpretation of the term as it applies to
construction projects and permit coverage. An overbroad interpretation of the term would render
meaningless the clear “one acre” federal permitting threshold and would potentially trigger permitting of
almost any construction activity that occurs within an area that had previously received area-wide utility or
road improvements.
Construction projects generally receive grading and/or building permits (Local Permits) from local
authorities prior to initiating construction activity. These Local Permits spell out the scope of the project,
the parcels involved, the type of construction approved, etc. Referring to the Local Permit helps define
“common plan of development or sale.” In cases such as tract home development, a Local Permit will
include all phases of the construction project including rough grading, utility and road installation, and
vertical construction. All construction activities approved in the Local Permit are part of the common plan
and must remain under the General Permit until construction is completed. For custom home
construction, Local Permits typically only approve vertical construction as the rough grading, utilities, and
road improvements were already independently completed under the a previous Local Permit. In the
case of a custom home site, the homeowner must submit plans and obtain a distinct and separate Local
Permit from the local authority in order to proceed. It is not the intent of the State Water Board to require
permitting for an individual homeowner building a custom home on a private lot of less than one acre if it
is subject to a separate Local Permit. Similarly, the installation of a swimming pool, deck, or landscaping
that disturbs less than one acre that was not part of any previous Local Permit are not required to be
permitted.
The following are several examples of construction activity of less than one acre that would require permit
coverage:
a. A landowner receives a building permit(s) to build tract homes on a 100-acre site split into
200 one-third acre parcels, (the remaining acreage consists of streets and parkways)
which are sold to individual homeowners as they are completed. The landowner
completes and sells all the parcels except for two. Although the remaining two parcels
combined are less than one acre, the landowner must continue permit coverage for the
two parcels.
b. One of the parcels discussed above is sold to another owner who intends to complete the
construction as already approved in the Local Permit. The new landowner must file
Permit Registration Documents (PRDs) to complete the construction even if the new
landowner is required to obtain a separate Local Permit.
c. Landowner in (1) above purchases 50 additional one half-acre parcels adjacent to the
original 200-acre project. The landowner seeks a Local Permit (or amendment to existing
Local permit) to build on 20 parcels while leaving the remaining 30 parcels for future
development. The landowner must amend PRDs to include the 20 parcels 14 days prior
to commencement of construction activity on those parcels.
C. Construction Activities Not Covered
1. Traditional Construction Projects Not Covered
This General Permit does not apply to the following construction activity:
a. Routine maintenance to maintain original line and grade, hydraulic capacity, or original
purpose of the facility.
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b. Disturbances to land surfaces solely related to agricultural operations such as disking,
harrowing, terracing and leveling, and soil preparation.
c. Discharges of storm water from areas on tribal lands; construction on tribal lands is
regulated by a federal permit.
d. Discharges of storm water within the Lake Tahoe Hydrologic Unit. The Lahontan
Regional Water Board has adopted its own permit to regulate storm water discharges
from construction activity in the Lake Tahoe Hydrologic Unit (Regional Water Board
6SLT). Owners of construction projects in this watershed must apply for the Lahontan
Regional Water Board permit rather than the statewide Construction General Permit.
Construction projects within the Lahontan region must also comply with the Lahontan
Region Project Guideline for Erosion Control (R6T-2005-0007 Section), which can be
found at
http://www.waterboards.ca.gov/lahontan/Adopted_Orders/2005/r6t_2005_0007.pdf
e. Construction activity that disturbs less than one acre of land surface, unless part of a
larger common plan of development or the sale of one or more acres of disturbed land
surface.
f. Construction activity covered by an individual NPDES Permit for storm water discharges.
g. Landfill construction activity that is subject to the Industrial General Permit.
h. Construction activity that discharges to Combined Sewer Systems.
i. Conveyances that discharge storm water runoff combined with municipal sewage.
j. Discharges of storm water identified in CWA § 402(l)(2), 33 U.S.C. § 1342(l)(2).
2. Linear Projects Not Covered
a. LUP construction activity does not include linear routine maintenance projects. Routine
maintenance projects are projects associated with operations and maintenance activities
that are conducted on existing lines and facilities and within existing right-of-way,
easements, franchise agreements, or other legally binding agreements of the discharger.
Routine maintenance projects include, but are not limited to projects that are conducted
to:
i. Maintain the original purpose of the facility or hydraulic capacity.
ii. Update existing lines5 and facilities to comply with applicable codes, standards, and
regulations regardless if such projects result in increased capacity.
iii. Repairing leaks.
5Update existing lines includes replacing existing lines with new materials or pipes.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
11
Routine maintenance does not include construction of new6 lines or facilities resulting from compliance
with applicable codes, standards, and regulations.
Routine maintenance projects do not include those areas of maintenance projects that are outside of an
existing right-of-way, franchise, easements, or agreements. When a project must secure new areas,
those areas may be subject to this General Permit based on the area of disturbed land outside the
original right-of-way, easement, or agreement.
b. LUP construction activity does not include field activities associated with the planning and
design of a project (e.g., activities associated with route selection).
c. Tie-ins conducted immediately adjacent to “energized” or “pressurized” facilities by the
discharger are not considered construction activities where all other LUP construction
activities associated with the tie-in are covered by an NOI and SWPPP of a third party or
municipal agency.
3. EPA’s Small Construction Rainfall Erosivity Waiver
EPA’s Storm Water Phase II Final Rule provides the option for a Small Construction Rainfall Erosivity
Waiver. This waiver applies to small construction sites between 1 and 5 acres, and allows permitting
authorities to waive those sites that do not have adverse water quality impacts.
Dischargers eligible for this waiver are exempt from Construction General Permit Coverage. In order to
obtain the waiver, the discharger must certify to the State Water Board that small construction activity will
occur only when the rainfall erosivity factor is less than 5 (“R” in the Revised Universal Soil Loss
Equation). The period of construction activity begins at initial earth disturbance and ends with final
stabilization. Where vegetation will be used for final stabilization, the date of installation of a practice that
provides interim non-vegetative stabilization can be used for the end of the construction period. The
operator must agree (as a condition waiver eligibility) to periodically inspect and properly maintain the
area until the criteria for final stabilization as defined in the General Permit have been met. If use of this
interim stabilization eligibility condition was relied on to qualify for the waiver, signature on the waiver with
a certification statement constitutes acceptance of and commitment to complete the final stabilization
process. The discharger must submit a waiver certification to the State Board prior to commencing
construction activities.
USEPA funded a cooperative agreement with Texas A&M University to develop an online rainfall erosivity
calculator. Dischargers can access the calculator from EPA’s website at: www.epa.gov/npdes/storm
water/cgp. Use of the calculator allows the discharger to determine potential eligibility for the rainfall
erosivity waiver. It may also be useful in determining the time periods during which construction activity
could be waived from permit coverage.
6New lines are those that are not associated with existing facilities and are not part of a project to update or replace
existing lines.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
12
D. Obtaining and Terminating Permit Coverage
The appropriate Legally Responsible Person (LRP) must obtain coverage under this General Permit. To
obtain coverage, the LRP or the LRP’s Approved Signatory must file Permit Registration Documents
(PRDs) prior to the commencement of construction activity. Failure to obtain coverage under this General
Permit for storm water discharges to waters of the United States is a violation of the CWA and the
California Water Code.
To obtain coverage under this General Permit, LRPs must electronically file the PRDs, which include a
Notice of Intent (NOI), Storm Water Pollution Prevention Plan (SWPPP), and other documents required
by this General Permit, and mail the appropriate permit fee to the State Water Board. It is expected that
as the storm water program develops, the Regional Water Boards may issue General Permits or
Individual Permits that contain more specific permit provisions. When this occurs, this General Permit will
no longer regulate those dischargers that obtain coverage under Individual Permits.
Any information provided to the Regional Water Board shall comply with the Homeland Security Act and
any other federal law that concerns security in the United States; any information that does not comply
should not be submitted.
The application requirements of the General Permit establish a mechanism to clearly identify the
responsible parties, locations, and scope of operations of dischargers covered by the General Permit and
to document the discharger’s knowledge of the General Permit’s requirements.
This General Permit provides a grandfathering exception to existing dischargers subject to Water Quality
Order No. 99-08-DWQ. Construction projects covered under Water Quality Order No. 99-08-DWQ shall
obtain permit coverage at Risk Level 1. LUP projects covered under Water Quality Order No. 2003-0007-
DWQ shall obtain permit coverage at LUP Type 1. The Regional Water Boards have the authority to
require Risk Determination to be performed on projects currently covered under Water Quality Order No.
99-08-DWQ and 2003-0007-DWQ where they deem necessary.
LRPs must file a Notice of Termination (NOT) with the Regional Water Board when construction is
complete and final stabilization has been reached or ownership has been transferred. The discharger
must certify that all State and local requirements have been met in accordance with this General Permit.
In order for construction to be found complete, the discharger must install post-construction storm water
management measures and establish a long-term maintenance plan. This requirement is intended to
ensure that the post-construction conditions at the project site do not cause or contribute to direct or
indirect water quality impacts (i.e., pollution and/or hydromodification) upstream and downstream.
Specifically, the discharger must demonstrate compliance with the post-construction standards set forth in
this General Permit (Section XIII). The discharger is responsible for all compliance issues including all
annual fees until the NOT has been filed and approved by the local Regional Water Board.
E. Discharge Prohibitions
This General Permit authorizes the discharge of storm water to surface waters from construction activities
that result in the disturbance of one or more acres of land, provided that the discharger satisfies all permit
conditions set forth in the Order. This General Permit prohibits the discharge of pollutants other than
storm water and non-storm water discharges authorized by this General Permit or another NPDES permit.
This General Permit also prohibits all discharges which contain a hazardous substance in excess of
reportable quantities established in 40 C.F.R. §§ 117.3 and 302.4, unless a separate NPDES Permit has
been issued to regulate those discharges. In addition, this General Permit incorporates discharge
prohibitions contained in water quality control plans, as implemented by the nine Regional Water Boards.
Discharges to Areas of Special Biological Significance (ASBS) are prohibited unless covered by an
exception that the State Water Board has approved.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
13
Non-storm water discharges include a wide variety of sources, including improper dumping, spills, or
leakage from storage tanks or transfer areas. Non-storm water discharges may contribute significant
pollutant loads to receiving waters. Measures to control spills, leakage, and dumping, and to prevent illicit
connections during construction must be addressed through structural as well as non-structural BMPs.
The State Water Board recognizes, however, that certain non-storm water discharges may be necessary
for the completion of construction projects. Authorized non-storm water discharges may include those
from de-chlorinated potable water sources such as: fire hydrant flushing, irrigation of vegetative erosion
control measures, pipe flushing and testing, water to control dust, uncontaminated ground water
dewatering, and other discharges not subject to a separate general NPDES permit adopted by a region.
Therefore this General Permit authorizes such discharges provided they meet the following conditions.
These authorized non-storm water discharges must:
1. be infeasible to eliminate;
2. comply with BMPs as described in the SWPPP;
3. filter or treat, using appropriate technology, all dewatering discharges from sedimentation
basins;
4. meet the NALs for pH and turbidity; and
5. not cause or contribute to a violation of water quality standards.
Additionally, authorized non-storm water discharges must not be used to clean up failed or inadequate
construction or post-construction BMPs designed to keep materials onsite. Authorized non-storm water
dewatering discharges may require a permit because some Regional Water Boards have adopted
General Permits for dewatering discharges.
This General Permit prohibits the discharge of storm water that causes or threatens to cause pollution,
contamination, or nuisance.
F. Effluent Standards for All Types of Discharges
1. Technology-Based Effluent Limitations
Permits for storm water discharges associated with construction activity must meet all applicable
provisions of Sections 301 and 402 of the CWA. These provisions require controls of pollutant
discharges that utilize best available technology economically achievable (BAT) for toxic pollutants and
non conventional pollutants and best conventional pollutant control technology (BCT) for conventional
pollutants. Additionally, these provisions require controls of pollutant discharges to reduce pollutants and
any more stringent controls necessary to meet water quality standards. The USEPA has already
established such limitations, known as effluent limitation guidelines (ELGs), for some industrial
categories. This is not the case with construction discharges. In instances where there are no ELGs the
permit writer is to use best professional judgment (BPJ) to establish requirements that the discharger
must meet using BAT/BCT technology. This General Permit contains only narrative effluent limitations
and does not contain numeric effluent limitations, except for Active Treatment Systems (ATS).
Order No. 2009-0009-DWQ, as originally adopted by the State Water Board on September 2, 2009,
contained numeric effluent limitations for pH (within the range of 6.0 and 9.0 pH units) and turbidity (500
NTU) that applied only to Risk Level 3 and LUP Type 3 construction sites. The State Water Board
adopted the numeric effluent limitations as technology-based effluent limitations based upon its best
professional judgment. The California Building Industry Association, the Building Industry Legal Defense
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
14
Foundation, and the California Business Properties Association (petitioners) challenged Order No. 2009-
0009-DWQ in California Building Industry Association et al. v. State Water Resources Control Board. On
December 27, 2011, the Superior Court issued a judgment and writ of mandamus. The Superior Court
ruled in favor of the State Water Board on almost all of the issues the petitioners raised, but the Superior
Court invalidated the numeric effluent limitations for pH and turbidity for Risk Level 3 and LUP Type 3
sites because it determined that the State Water Board did not have sufficient BMP performance data to
support those numeric effluent limitations. Therefore, the Superior Court concluded that the State Water
Board did not comply with the federal regulations that apply to the use of best professional judgment. In
invalidating the numeric effluent limitations, the Superior Court also suspended two ancillary requirements
(a compliance storm event provision and receiving water monitoring at Risk Level 3 and LUP Type 3 sites
that violated the numeric effluent limitations) that related solely to the invalidated numeric effluent
limitations.
As a result of the Superior Court’s writ of mandamus, this Order no longer contains numeric effluent
limitations for pH and turbidity, except for ATS. In addition, as a result of the Superior Court’s writ of
mandamus, the receiving water monitoring requirements for Risk Level 3 and LUP Type 3 sites were
suspended until the State Water Board amended this Order to restore the receiving water monitoring
requirements. As amended, this Order now requires Risk Level 3 and LUP Type 3 Dischargers with
direct discharges to surface waters to conduct receiving water monitoring whenever their effluent exceeds
specified receiving water monitoring triggers. The receiving water monitoring triggers were established at
the same levels as the previous numeric effluent limitations (effluent pH outside the range of 6.0 and 9.0
pH units or turbidity exceeding 500 NTU). In restoring the receiving water monitoring requirements, the
State Water Board determined that it was appropriate to require receiving water monitoring for these
types of sites with direct discharges to surface waters that exceeded the receiving water monitoring
triggers under any storm event scenarios, because these sites represent the highest threat to receiving
water quality. An exceedance of a receiving water monitoring trigger does not constitute a violation of this
General Permit. These receiving water monitoring requirements take effect on the effective date of the
amendment to this Order.
BAT/BCT technologies not only include passive systems such as conventional runoff and sediment
control, but also treatment systems such as coagulation/flocculation using sand filtration, when
appropriate. Such technologies allow for effective treatment of soil particles less 0.02 mm (medium silt) in
diameter. The discharger must install structural controls, as necessary, such as erosion and sediment
controls that meet BAT and BCT to achieve compliance with water quality standards. The narrative
effluent limitations constitute compliance with the requirements of the CWA.
Because the permit is an NPDES permit, there is no legal requirement to address the factors set forth in
Water Code sections 13241 and 13263, unless the permit is more stringent than what federal law
requires. (See City of Burbank v. State Water Resources Control Bd. (2005) 35 Cal.4th 613, 618, 627.)
None of the requirements in this permit are more stringent than the minimum federal requirements, which
include technology-based requirements achieving BAT/BCT and strict compliance with water quality
standards. The inclusion of numeric effluent limitations (NELs) in the permit for Active Treatment Systems
does not cause the permit to be more stringent than current federal law. NELs and best management
practices are simply two different methods of achieving the same federal requirement: strict compliance
with state water quality standards. Federal law authorizes both narrative and numeric effluent limitations
to meet state water quality standards. The use of NELs to achieve compliance with water quality
standards is not a more stringent requirement than the use of BMPs. (State Water Board Order No. WQ
2006-0012 (Boeing).) Accordingly, the State Water Board does not need to take into account the factors
in Water Code sections 13241 and 13263.
The State Water Board has concluded that the establishment of BAT/BCT will not create or aggravate
other environmental problems through increases in air pollution, solid waste generation, or energy
consumption. While there may be a slight increase in non-water quality impacts due to the
implementation of additional monitoring or the construction of additional BMPs, these impacts will be
negligible in comparison with the construction activities taking place on site and would be justified by the
water quality benefits associated with compliance.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
15
pH Receiving Water Monitoring Trigger
Given the potential contaminants, the minimum standard method for control of pH in runoff requires the
use of preventive measures such as avoiding concrete pours during rainy weather, covering concrete and
directing flow away from fresh concrete if a pour occurs during rain, covering scrap drywall and stucco
materials when stored outside and potentially exposed to rain, and other housekeeping measures. If
necessary, pH-impaired storm water from construction sites can be treated in a filter or settling pond or
basin, with additional natural or chemical treatment required to meet pH limits set forth in this permit. The
basin or pond acts as a collection point and holds storm water for a sufficient period for the contaminants
to be settled out, either naturally or artificially, and allows any additional treatment to take place. The
State Water Board considers these techniques to be equivalent to BCT. In determining the pH
concentration trigger for discharges, the State Water Board used BPJ to set these limitations.
The chosen trigger was established by calculating three standard deviations above and below the mean
pH of runoff from highway construction sites7 in California. Proper implementation of BMPs should result
in discharges that are within the range of 6.0 to 9.0 pH Units.
Turbidity Receiving Water Monitoring Trigger
The Turbidity receiving water monitoring trigger of 500 NTU is a technology-based trigger and was
developed using three different analyses aimed at finding the appropriate threshold to set the technology-
based limit to ensure environmental protection, effluent quality and cost-effectiveness. The analyses fell
into three, main types: (1) an ecoregion-specific dataset developed by Simon et. al. (2004) 8; (2)
Statewide Regional Water Quality Control Board enforcement data; and (3) published, peer-reviewed
studies and reports on in-situ performance of best management practices in terms of erosion and
sediment control on active construction sites.
A 1:3 relationship between turbidity (expressed as NTU) and suspended sediment concentration
(expressed as mg/L) is assumed based on a review of suspended sediment and turbidity data from three
gages used in the USGS National Water Quality Assessment Program:
USGS 11074000 SANTA ANA R BL PRADO DAM CA
USGS 11447650 SACRAMENTO R A FREEPORT CA
USGS 11303500 SAN JOAQUIN R NR VERNALIS CA
The receiving water monitoring trigger represents staff determination that the trigger value is the most
practicable based on available data. The turbidity receiving water monitoring trigger represents a bridge
between the narrative effluent limitations and receiving water limitations. To support this receiving water
monitoring trigger, State Water Board staff analyzed construction site discharge information (monitoring
data, estimates) and receiving water monitoring information.
Since the turbidity receiving water monitoring trigger represents an appropriate threshold level expected
at a site, compliance with this value does not necessarily represent compliance with either the narrative
effluent limitations (as enforced through the BAT/BCT standard) or the receiving water limitations. In the
San Diego region, some inland surface waters have a receiving water objective for turbidity equal to 20
NTU. Obviously a discharge up to, but not exceeding, the turbidity receiving water monitoring trigger of
7 Caltrans Construction Sites Runoff Characterization Study, 2002. Available at: http://www.dot.ca.gov/hq/env/storm
water/pdf/CTSW-RT-02-055.pdf.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
16
500 NTU may still cause or contribute to the exceedance of the 20 NTU standard. Most of the waters of
the State are protected by turbidity objectives based on background conditions.
Table 1 - Regional Water Board Basin Plans, Water Quality Objectives for Turbidity
REGIONAL
WATER BOARD
WQ Objective Background/Natural
Turbidity
Maximum
Increase
1 Based on
background
All levels 20%
2 Based on
background
> 50 NTU 10%
3 Based on
background
0-50 JTU
50-100 JTU
> 100 JTU
20%
10 NTU
10%
4 Based on
background
0-50 NTU
> 50 NTU
20%
10%
5 Based on
background
0-5 NTU
5-50 NTU
50-100 NTU
>100 NTU
1 NTU
20%
10 NTU
10%
6 Based on
background
All levels 10%
7 Based on
background
N/A N/A
8 Based on
background
0-50 NTU
50-100 NTU
>100 NTU
20%
10 NTU
10%
9 Inland Surface
Waters, 20 NTU
All others, based
on background
0-50 NTU
50-100 NTU
>100 NTU
20%
10 NTU
10%
Table 2 shows the suspended sediment concentrations at the 1.5 year flow recurrence interval for the 12
ecoregions in California from Simon et. al (2004).
Table 2 - Results of Ecoregion Analysis
Ecoregion Percent of California Land
Area
Median Suspended Sediment
Concentration (mg/L)
1 9.1 874
4 0.2 120
5 8.8 35.6
6 20.7 1530
7 7.7 122
8 3.0 47.4
9 9.4 284
13 5.2 143
14 21.7 5150
78 8.1 581
80 2.4 199
81 3.7 503
Area-weighted average 1633
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
17
If a 1:3 relationship between turbidity and suspended sediment is assumed, the median turbidity is 544
NTU.
The following table is composed of turbidity readings measured in NTUs from administrative civil liability
(ACL) actions for construction sites from 2003 - 2009. This data was derived from the complete listing of
construction-related ACLs for the six year period. All ACLs were reviewed and those that included
turbidimeter readings at the point of storm water discharge were selected for this dataset.
Table 3 – ACL Sampling Data taken by Regional Water Board Staff
WDID# Region Discharger Turbidity (NTU)
5S34C331884
5S Bradshaw
Interceptor
Section 6B
1800
5S05C325110
5S Bridalwood
Subdivision
1670
5S48C336297
5S Cheyenne at
Browns Valley
1629
5R32C314271
5R Grizzly Ranch
Construction
1400
6A090406008 6T El Dorado County
Department of
Transportation,
Angora Creek
97.4
5S03C346861 5S TML
Development,
LLC
1600
6A31C325917 6T Northstar Village See Subdata
Set
Subdata Set - Turbidity for point of storm water runoff discharge at Northstar Village
Date Turbidity
(NTU)
Location
10/5/2006 900 Middle Martis Creek
11/2/2006 190 Middle Martis Creek
01/04/2007 36 West Fork, West Martis Creek
02/08/2007 180 Middle Martis Creek
02/09/2007 130 Middle Martis Creek
02/09/2007 290 Middle Martis Creek
02/09/2007 100 West Fork, West Martis Creek
02/10/2007 28 Middle Martis Creek
02/10/2007 23 Middle Martis Creek
02/10/2007 32 Middle Martis Creek
02/10/2007 12 Middle Martis Creek
02/10/2007 60 West Fork, West Martis Creek
02/10/2007 34 West Fork, West Martis Creek
A 95% confidence interval for mean turbidity in an ACL order was constructed. The data set used was a
small sample size, so the 500 NTU (the value derived as the receiving water monitoring trigger for this
General Permit) needed to be verified as a possible population mean. In this case, the population refers
to a hypothetical population of turbidity measurements of which our sample of 20 represents. A t-
distribution was assumed due to the small sample size:
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
18
Mean: 512.23 NTU
Standard Deviation: 686.85
Margin of Error: 321.45
Confidence Interval: 190.78 NTU (Low)
833.68 NTU (High)
Based on a constructed 95% confidence interval, an ACL order turbidity measurement will be between
190.78 – 833.68 NTU. 500 NTU falls within this range. Using the same data set, a small-sample
hypothesis test was also performed to test if the ACL turbidity data set contains enough information to
cast doubt on choosing a 500 NTU as a mean. 500 NTU was again chosen due to its proposed use as
an acceptable value. The test was carried out using a 95% confidence interval. Results indicated that
the ACL turbidity data set does not contain significant sample evidence to reject the claim of 500 NTU as
an acceptable mean for the ACL turbidity population.
There are not many published, peer-reviewed studies and reports on in-situ performance of best
management practices in terms of erosion and sediment control on active construction sites. The most
often cited study is a report titled, “Improving the Cost Effectiveness of Highway Construction Site Erosion
and Pollution Control” (Horner, Guedry, and Kortenhof 1990,
http://www.wsdot.wa.gov/Research/Reports/200/200.1.htm). In a comment letter summarizing this report
sent to the State Water Board, the primary author, Dr. Horner, states:
“The most effective erosion control product was wood fiber mulch applied at two different rates along with
a bonding agent and grass seed in sufficient time before the tests to achieve germination. Plots treated in
this way reduced influent turbidity by more than 97 percent and discharged effluent exhibiting mean and
maximum turbidity values of 21 and 73 NTU, respectively. Some other mulch and blanket materials
performed nearly as well. These tests demonstrated the control ability of widely available BMPs over a
very broad range of erosion potential.”
Other technologies studied in this report produced effluent quality at or near 100 NTU. It is the BPJ of the
State Water Board staff that erosion control, while preferred, is not always an option on construction sites
and that technology performance in a controlled study showing effluent quality directly leaving a BMP is
always easier and cheaper to control than effluent being discharged from the project (edge of property,
etc.). As a result, it is the BPJ of the State Water Board staff that it is not cost effective or feasible, at this
time, for all risk level and type 3 sites in California to achieve effluent discharges with turbidity values that
are less than 100 NTU.
To summarize, the analysis showed that: (1) results of the Simon et. al dataset reveals turbidity values in
background receiving water in California’s ecoregions range from 16 NTU to 1716 NTU (with a mean of
544 NTU); (2) based on a constructed 95% confidence interval, construction sites will be subject to
administrative civil liability (ACL) when their turbidity measurement falls between 190.78 – 833.68 NTU;
and (3) sites with highly controlled discharges employing and maintaining good erosion control practices
can discharge effluent from the BMP with turbidity values less than 100 NTU. State Water Board staff
has determined, using its BPJ, that it is most cost effective to set the receiving water monitoring trigger for
turbidity at 500 NTU.
i. Compliance Storm Event
While this General Permit no longer contains “compliance storm event” exceptions from technology-based
NELs, the “compliance storm event” exception from the ATS NELs remain in effect. See Section K of this
Fact Sheet, and Attachment F of this General Permit for more information.
a. TMDLs and Waste Load Allocations
Dischargers located within the watershed of a CWA § 303(d) impaired water body, for which a TMDL for
sediment has been adopted by the Regional Water Board or USEPA, must comply with the approved
TMDL if it identifies “construction activity” or land disturbance as a source of sediment. If it does, the
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
19
TMDL should include a specific waste load allocation for this activity/source. The discharger, in this case,
may be required by a separate Regional Water Board order to implement additional BMPs, conduct
additional monitoring activities, and/or comply with an applicable waste load allocation and
implementation schedule. If a specific waste load allocation has been established that would apply to a
specific discharge, the Regional Water Board may adopt an order requiring specific implementation
actions necessary to meet that allocation. In the instance where an approved TMDL has specified a
general waste load allocation to construction storm water discharges, but no specific requirements for
construction sites have been identified in the TMDL, dischargers must consult with the state TMDL
authority9 to confirm that adherence to a SWPPP that meets the requirements of the General Permit will
be consistent with the approved TMDL.
2. Determining Compliance with Effluent Standards
a. Technology-Based Numeric Action Levels (NALs)
This General Permit contains technology-based NALs for pH and turbidity, and requirements for effluent
monitoring at all Risk level 2 & 3, and LUP Type 2 & 3 sites. Numeric action levels are essentially
numeric benchmark values for certain parameters that, if exceeded in effluent sampling, trigger the
discharger to take actions. Exceedance of an NAL does not itself constitute a violation of the General
Permit. If the discharger fails to take the corrective action required by the General Permit, though, that
may consititute a violation.
The primary purpose of NALs is to assist dischargers in evaluating the effectiveness of their on-site
measures. Construction sites need to employ many different systems that must work together to achieve
compliance with the permit's requirements. The NALs chosen should indicate whether the systems are
working as intended.
Another purpose of NALs is to provide information regarding construction activities and water quality
impacts. This data will provide the State and Regional Water Boards and the rest of the storm water
community with more information about levels and types of pollutants present in runoff and how effective
the dischargers BMPs are at reducing pollutants in effluent. The State Water Board also hopes to learn
more about the linkage between effluent and receiving water quality. In addition, these requirements will
provide information on the mechanics needed to establish compliance monitoring programs at
construction sites in future permit deliberations.
i. pH
The chosen limits were established by calculating one standard deviation above and below the mean pH
of runoff from highway construction sites10 in California. Proper implementation of BMPs should result in
discharges that are within the range of 6.5 to 8.5 pH Units.
9 http://www.waterboards.ca.gov/tmdl/tmdl.html. 10 Caltrans Construction Sites Runoff Characterization Study, 2002. Available at: http://www.dot.ca.gov/hq/env/storm
water/pdf/CTSW-RT-02-055.pdf.
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20
The Caltrans study included 33 highway construction sites throughout California over a period of four
years, which included 120 storm events. All of these sites had BMPs in place that would be generally
implemented at all types of construction sites in California.
ii. Turbidity
BPJ was used to develop an NAL that can be used as a learning tool to help dischargers improve their
site controls, and to provide meaningful information on the effectiveness of storm water controls. A
statewide turbidity NAL has been set at 250 NTU.
G. Receiving Water Limitations
Construction-related activities that cause or contribute to an exceedance of water quality standards must
be addressed. The dynamic nature of construction activity gives the discharger the ability to quickly
identify and monitor the source of the exceedances. This is because when storm water mobilizes
sediment, it provides visual cues as to where corrective actions should take place and how effective they
are once implemented.
This General Permit requires that storm water discharges and authorized non-storm water discharges
must not contain pollutants that cause or contribute to an exceedance of any applicable water quality
objective or water quality standards. The monitoring requirements in this General Permit for sampling
and analysis procedures will help determine whether BMPs installed and maintained are preventing
pollutants in discharges from the construction site that may cause or contribute to an exceedance of
water quality standards.
Water quality standards consist of designated beneficial uses of surface waters and the adoption of
ambient criteria necessary to protect those uses. When adopted by the State Water Board or a Regional
Water Board, the ambient criteria are termed “water quality objectives.” If storm water runoff from
construction sites contains pollutants, there is a risk that those pollutants could enter surface waters and
cause or contribute to an exceedance of water quality standards. For that reason, dischargers should be
aware of the applicable water quality standards in their receiving waters. (The best method to ensure
compliance with receiving water limitations is to implement BMPs that prevent pollutants from contact with
storm water or from leaving the construction site in runoff.)
In California, water quality standards are published in the Basin Plans adopted by each Regional Water
Board, the California Toxics Rule (CTR), the National Toxics Rule (NTR), and the Ocean Plan.
Dischargers can determine the applicable water quality standards by contacting Regional Water Board
staff or by consulting one of the following sources. The actual Basin Plans that contain the water quality
standards can be viewed at the website of the appropriate Regional Water Board.
(http://www.waterboards.ca.gov/regions.html), the State Water Board site for statewide plans
(http://www.waterboards.ca.gov/plnspols/index.html), or the USEPA regulations for the NTR and CTR (40
C.F.R. §§ 131.36-38). Basin Plans and statewide plans are also available by mail from the appropriate
Regional Water Board or the State Water Board. The USEPA regulations are available at
http://www.epa.gov/. Additional information concerning water quality standards can be accessed through
http://www.waterboards.ca.gov/stormwtr/gen_const.html.
H. Training Qualifications and Requirements
The Blue Ribbon Panel (BRP) made the following observation about the lack of industry-specific training
requirements:
“Currently, there is no required training or certification program for contractors, preparers of soil erosion
and sediment control Storm Water Pollution Prevention Plans, or field inspectors.”
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
21
Order 99-08-DWQ required that all dischargers train their employees on how to comply with the permit,
but it did not specificy a curriculum or certification program. This has resulted in inconsistent
implementation by all affected parties - the dischargers, the local governments where the construction
activity occurs, and the regulators required to enforce 99-08-DWQ. This General Permit requires
Qualified SWPPP Developers and practitioners to obtain appropriate training, and makes this curriculum
mandatory two years after adoption, to allow time for course completion. The State and Regional Water
Board are working with many stakeholders to develop the curriculum and mechanisms needed to develop
and deliver the courses.
To ensure that the preparation, implementation, and oversight of the SWPPP is sufficient for effective
pollution prevention, the Qualified SWPPP Developer and Qualified SWPPP Practitioners responsible for
creating, revising, overseeing, and implementing the SWPPP must attend a State Water Board-
sponsored or approved Qualified SWPPP Developer and Qualified SWPPP Practitioner training course.
I. Sampling, Monitoring, Reporting and Record Keeping
1. Traditional Construction Monitoring Requirements
This General Permit requires visual monitoring at all sites, and effluent water quality at all Risk Level 2 &
3 sites. It requires receiving water monitoring at some Risk Level 3 sites. All sites are required to submit
annual reports, which contain various types of information, depending on the site characteristics and
events. A summary of the monitoring and reporting requirements is found in Table 4.
Table 4 - Required Monitoring Elements for Risk Levels
Visual Non-visible
Pollutant
Effluent Receiving Water
Risk Level 1
three types required
for all Risk Levels:
non-storm water,
pre-rain and post-
rain
As needed for all
Risk Levels (see
below)
where applicable not required
Risk Level 2 pH, turbidity not required
Risk Level 3 pH, turbidity (if Receiving Water
Monitoring Trigger
exceeded) pH, turbidity
and SSC. Bioassessment
for sites 30 acres or
larger.
a. Visual
All dischargers are required to conduct quarterly, non-storm water visual inspections. For these
inspections, the discharger must visually observe each drainage area for the presence of (or indications
of prior) unauthorized and authorized non-storm water discharges and their sources. For storm-related
inspections, dischargers must visually observe storm water discharges at all discharge locations within
two business days after a qualifying event. For this requirement, a qualifying rain event is one producing
precipitation of ½ inch or more of discharge. Dischargers must conduct a post-storm event inspection to
(1) identify whether BMPs were adequately designed, implemented, and effective, and (2) identify any
additional BMPs necessary and revise the SWPPP accordingly. Dischargers must maintain on-site
records of all visual observations, personnel performing the observations, observation dates, weather
conditions, locations observed, and corrective actions taken in response to the observations.
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b. Non-Visible Pollutant Monitoring
This General Permit requires that all dischargers develop a sampling and analysis strategy for monitoring
pollutants that are not visually detectable in storm water. Monitoring for non-visible pollutants must be
required at any construction site when the exposure of construction materials occurs and where a
discharge can cause or contribute to an exceedance of a water quality objective.
Of significant concern for construction discharges are the pollutants found in materials used in large
quantities at construction sites throughout California and exposed throughout the rainy season, such as
cement, flyash, and other recycled materials or by-products of combustion. The water quality standards
that apply to these materials will depend on their composition. Some of the more common storm water
pollutants from construction activity are not CTR pollutants. Examples of non-visible pollutants include
glyphosate (herbicides), diazinon and chlorpyrifos (pesticides), nutrients (fertilizers), and molybdenum
(lubricants). The use of diazinon and chlorpyrifos is a common practice among landscaping professionals
and may trigger sampling and analysis requirements if these materials come into contact with storm
water. High pH values from cement and gypsum, high pH and SSC from wash waters, and
chemical/fecal contamination from portable toilets, also are not CTR pollutants. Although some of these
constituents do have numeric water quality objectives in individual Basin Plans, many do not and are
subject only to narrative water quality standards (i.e. not causing toxicity). Dischargers are encouraged to
discuss these issues with Regional Water Board staff and other storm water quality professionals.
The most effective way to avoid the sampling and analysis requirements, and to ensure permit
compliance, is to avoid the exposure of construction materials to precipitation and storm water runoff.
Materials that are not exposed do not have the potential to enter storm water runoff, and therefore
receiving waters sampling is not required. Preventing contact between storm water and construction
materials is one of the most important BMPs at any construction site.
Preventing or eliminating the exposure of pollutants at construction sites is not always possible. Some
materials, such as soil amendments, are designed to be used in a manner that will result in exposure to
storm water. In these cases, it is important to make sure that these materials are applied according to the
manufacturer’s instructions and at a time when they are unlikely to be washed away. Other construction
materials can be exposed when storage, waste disposal or the application of the material is done in a
manner not protective of water quality. For these situations, sampling is required unless there is capture
and containment of all storm water that has been exposed. In cases where construction materials may
be exposed to storm water, but the storm water is contained and is not allowed to run off the site,
sampling will only be required when inspections show that the containment failed or is breached, resulting
in potential exposure or discharge to receiving waters.
The discharger must develop a list of potential pollutants based on a review of potential sources, which
will include construction materials soil amendments, soil treatments, and historic contamination at the site.
The discharger must review existing environmental and real estate documentation to determine the
potential for pollutants that could be present on the construction site as a result of past land use activities.
Good sources of information on previously existing pollution and past land uses include:
i. Environmental Assessments;
ii. Initial Studies;
iii. Phase 1 Assessments prepared for property transfers; and
iv. Environmental Impact Reports or Environmental Impact Statements prepared under
the requirements of the National Environmental Policy Act or the California
Environmental Quality Act.
In some instances, the results of soil chemical analyses may be available and can provide additional
information on potential contamination.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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The potential pollutant list must include all non-visible pollutants that are known or should be known to
occur on the construction site including, but not limited to, materials that:
i. are being used in construction activities;
ii. are stored on the construction site;
iii. were spilled during construction operations and not cleaned up;
iv. were stored (or used) in a manner that created the potential for a release of the
materials during past land use activities;
v. were spilled during previous land use activities and not cleaned up; or
vi. were applied to the soil as part of past land use activities.
c. Effluent Monitoring
Federal regulations11 require effluent monitoring for discharges subject to NALs. Subsequently, all Risk
Level 2 and 3 dischargers must perform sampling and analysis of effluent discharges to characterize
discharges associated with construction activity from the entire area disturbed by the project. Dischargers
must collect samples of stored or contained storm water that is discharged subsequent to a storm event
producing precipitation of ½ inch or more at the time of discharge.
Table 5 - Storm Water Effluent Monitoring Requirements by Risk Level
Frequency Effluent Monitoring
(Section E, below)
Risk Level 1 when applicable non-visible pollutant parameters (if
applicable)
Risk Level 2 Minimum of 3 samples per day during qualifying
rain event characterizing discharges associated
with construction activity from the entire project
disturbed area.
pH, turbidity, and non-visible pollutant
parameters (if applicable)
Risk Level 3 Minimum of 3 samples per day during qualifying
rain event characterizing discharges associated
with construction activity from the entire project
disturbed area.
pH, turbidity, and non-visible pollutant
parameters if applicable
Risk Level 1 dischargers must analyze samples for:
i. any parameters indicating the presence of pollutants identified in the pollutant source
assessment required in Attachment C contained in the General Permit.
11 40 C.F.R. § 122.44.
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Risk Level 2 dischargers must analyze samples for:
i. pH and turbidity;
ii. any parameters indicating the presence of pollutants identified in the pollutant source
assessment required in Attachment D contained in the General Permit, and
iii. any additional parameters for which monitoring is required by the Regional Water
Board.
Risk Level 3 dischargers must analyze samples for:
i. pH, turbidity;
ii. any parameters indicating the presence of pollutants identified in the pollutant source
assessment required in Attachment E contained in the General Permit, and
iii. any additional parameters for which monitoring is required by the Regional Water
Board.
2. Linear Monitoring and Sampling Requirements
Attachment A, establishes minimum monitoring and reporting requirements for all LUPs. It establishes
different monitoring requirements depending on project complexity and risk to water quality. The
monitoring requirements for Type 1 LUPs are less than Type 2 & 3 projects because Type 1 projects
have a lower potential to impact water quality.
A discharger shall prepare a monitoring program prior to the start of construction and immediately
implement the program at the start of construction for LUPs. The monitoring program must be
implemented at the appropriate level to protect water quality at all times throughout the life of the project.
a. Type 1 LUP Monitoring Requirements
A discharger must conduct daily visual inspections of Type 1 LUPs during working hours while
construction activities are occurring. Inspections are to be conducted by qualified personnel and can be
conducted in conjunction with other daily activities. Inspections will be conducted to ensure the BMPs are
adequate, maintained, and in place at the end of the construction day. The discharger will revise the
SWPPP, as appropriate, based on the results of the daily inspections. Inspections can be discontinued in
non-active construction areas where soil disturbing activities have been completed and final stabilization
has been achieved (e.g., trench has been paved, substructures have been installed, and successful final
vegetative cover or other stabilization criteria have been met).
A discharger shall implement the monitoring program for inspecting Type 1 LUPs. This program requires
temporary and permanent stabilization BMPs after active construction is completed. Inspection activities
will continue until adequate permanent stabilization has been established and will continue in areas
where re-vegetation is chosen until minimum vegetative coverage has been established. Photographs
shall be taken during site inspections and submitted to the State Water Board.
b. Type 2 & 3 LUP Monitoring Requirements
A discharger must conduct daily visual inspections of Type 2 & 3 LUPs during working hours while
construction activities are occurring. Inspections are to be conducted by qualified personnel and can be in
conjunction with other daily activities.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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All dischargers of Type 2 & 3 LUPs are required to conduct inspections by qualified personnel of the
construction site during normal working hours prior to all anticipated storm events and after actual storm
events. During extended storm events, the discharger shall conduct inspections during normal working
hours for each 24-hour period. Inspections can be discontinued in non-active construction areas where
soil disturbing activities have been completed and final stabilization has been achieved (e.g., trench has
been paved, substructures installed, and successful vegetative cover or other stabilization criteria have
been met).
The goals of these inspections are (1) to identify areas contributing to a storm water discharge; (2) to
evaluate whether measures to reduce pollutant loadings identified in the SWPPP are adequate and
properly installed and functioning in accordance with the terms of the General Permit; and (3) to
determine whether additional control practices or corrective maintenance activities are needed.
Equipment, materials, and workers must be available for rapid response to failures and emergencies. All
corrective maintenance to BMPs shall be performed as soon as possible, depending upon worker safety.
All dischargers shall develop and implement a monitoring program for inspecting Type 2 & 3 LUPs that
require temporary and permanent stabilization BMPs after active construction is completed. Inspections
will be conducted to ensure the BMPs are adequate and maintained. Inspection activities will continue
until adequate permanent stabilization has been established and will continue in areas where
revegetation is chosen until minimum vegetative coverage has been established.
A log of inspections conducted before, during, and after the storm events must be maintained in the
SWPPP. The log will provide the date and time of the inspection and who conducted the inspection.
Photographs must be taken during site inspections and submitted to the State Water Board.
c. Sampling Requirements for all LUP Project Types
LUPs are also subject to sampling and analysis requirements for visible pollutants (i.e.,
sedimentation/siltation, turbidity) and for non-visible pollutants.
Sampling for visible pollutants is required for Type 2 & 3 LUPs.
Non-visible pollutant monitoring is required for pollutants associated with construction sites and activities
that (1) are not visually detectable in storm water discharges, and (2) are known or should be known to
occur on the construction site, and (3) could cause or contribute to an exceedance of water quality
objectives in the receiving waters. Sample collection for non-visible pollutants must only be required (1)
during a storm event when pollutants associated with construction activities may be discharged with
storm water runoff due to a spill, or in the event there was a breach, malfunction, failure, and/or leak of
any BMP, and (2) when the discharger has failed to adequately clean the area of material and pollutants.
Failure to implement appropriate BMPs will trigger the same sampling requirements as those required for
a breach, malfunction and/or leak, or when the discharger has failed to implement appropriate BMPs prior
to the next storm event.
Additional monitoring parameters may be required by the Regional Water Boards.
It is not anticipated that many LUPs will be required to collect samples for pollutants not visually detected
in runoff due to the nature and character of the construction site and activities as previously described in
this fact sheet. Most LUPs are constructed in urban areas with public access (e.g., existing roadways,
road shoulders, parking areas, etc.). This raises a concern regarding the potential contribution of
pollutants from vehicle use and/or from normal activities of the public (e.g., vehicle washing, landscape
fertilization, pest spraying, etc.) in runoff from the project site. Since the dischargers are not the land
owners of the project area and are not able to control the presence of these pollutants in the storm water
that runs through their projects, it is not the intent of this General Permit to require dischargers to sample
for these pollutants. This General Permit does not require the discharger to sample for these types of
pollutants except where the discharger has brought materials onsite that contain these pollutants and
when a condition (e.g., breach, failure, etc.) described above occurs.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
26
3. Receiving Water Monitoring
In order to ensure that receiving water limitations are met, discharges subject to receiving water
monitoring triggers (i.e., Risk Level 3 and LUP Type 3 sites) or numeric effluent limitations (i.e., Risk
Level 3 and LUP Type 3 sites utilizing ATS with direct discharges into receiving waters) must also monitor
the downstream receiving water(s) for turbidity, SSC, and pH (if applicable) when a receiving water
monitoring trigger or NEL is exceeded.
a. Bioassessment Monitoring
This General Permit requires a bioassessment of receiving waters for dischargers of Risk Level 3 or LUP
Type 3 construction projects equal to or larger than 30 acres with direct discharges into receiving waters.
Benthic macroinvertebrate samples will be taken upstream and downstream of the site’s discharge point
in the receiving water. Bioassessments measure the quality of the stream by analyzing the aquatic life
present. Higher levels of appropriate aquatic species tend to indicate a healthy stream; whereas low
levels of organisms can indicate stream degradation. Active construction sites have the potential to
discharge large amounts of sediment and pollutants into receiving waters. Requiring a bioassessment for
large project sites, with the most potential to impact water quality, provides a snapshot of the health of the
receiving water prior to initiation of construction activities. This snapshot can be used in comparison to
the health of the receiving water after construction has commenced.
Each ecoregion (biologically and geographically related area) in the State has a specific yearly peak time
where stream biota is in a stable and abundant state. This time of year is called an Index Period. The
bioassessment requirements in this General Permit, requires benthic macroinvertebrate sampling within a
sites index period. The State Water Board has developed a map designating index periods for the
ecoregions in the State (see State Water Board Website).
This General Permit requires the bioassessment methods to be in accordance with the Surface Water
Ambient Monitoring Program (SWAMP) in order to provide data consistency within the state as well as
generate useable biological stream data.
Table 6 - Receiving Water Monitoring Requirements
Receiving Water Monitoring Parameters
Risk Level 1 /LUP Type 1 not required
Risk Level 2 / LUP Type 2 not required
Risk Level 3 / LUP Type 3 If Receiving Water Monitoring Trigger
exceeded: pH (if applicable), turbidity, and
SSC.
Bioassessment for sites 30 acres or larger.
4. Reporting Requirements
a. NAL Exceedance Report
All Risk Level 3 and LUP Type 3 dischargers must electronically submit all storm event sampling results
to the State And Regional Boards, via the electronic data system, no later than 10 days after the
conclusion of the storm event.
b. Annual Report
All dischargers must prepare and electronically submit an annual report no later than September 1 of
each year using the Storm water Multi-Application Reporting and Tracking System (SMARTS). The
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27
Annual Report must include a summary and evaluation of all sampling and analysis results, original
laboratory reports, chain of custody forms, a summary of all corrective actions taken during the
compliance year, and identification of any compliance activities or corrective actions that were not
implemented.
5. Record Keeping
According to 40 C.F.R. Parts 122.21(p) and 122.41(j), the discharger is required to retain paper or
electronic copies of all records required by this General Permit for a period of at least three years from the
date generated or the date submitted to the State Water Board or Regional Water Boards. A discharger
must retain records for a period beyond three years as directed by Regional Water Board.
J. Risk Determination
1. Traditional Projects
a. Overall Risk Determination
There are two major requirements related to site planning and risk determination in this General Permit.
The project’s overall risk is broken up into two elements – (1) project sediment risk (the relative amount of
sediment that can be discharged, given the project and location details) and (2) receiving water risk (the
risk sediment discharges pose to the receiving waters).
Project Sediment Risk:
Project Sediment Risk is determined by multiplying the R, K, and LS factors from the Revised Universal
Soil Loss Equation (RUSLE) to obtain an estimate of project-related bare ground soil loss expressed in
tons/acre. The RUSLE equation is as follows:
A = (R)(K)(LS)(C)(P)
Where: A = the rate of sheet and rill erosion
R = rainfall-runoff erosivity factor
K = soil erodibility factor
LS = length-slope factor
C = cover factor (erosion controls)
P = management operations and support practices (sediment controls)
The C and P factors are given values of 1.0 to simulate bare ground conditions.
There is a map option and a manual calculation option for determining soil loss. For the map option, the
R factor for the project is calculated using the online calculator at
http://cfpub.epa.gov/npdes/stormwater/LEW/lewCalculator.cfm. The product of K and LS are shown on
Figure 1. To determine soil loss in tons per acre, the discharger multiplies the R factor times the value for
K times LS from the map.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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Figure 1 -Statewide Map of K * LS
For the manual calculation option, the R factor for the project is calculated using the online calculator at
http://cfpub.epa.gov/npdes/stormwater/LEW/lewCalculator.cfm. The K and LS factors are determined
using Appendix 1.
Soil loss of less than 15 tons/acre is considered low sediment risk.
Soil loss between 15 and 75 tons/acre is medium sediment risk.
Soil loss over 75 tons/acre is considered high sediment risk.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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The soil loss values and risk categories were obtained from mean and standard deviation RKLS values
from the USEPA EMAP program. High risk is the mean RKLS value plus two standard deviations. Low
risk is the mean RKLS value minus two standard deviations.
Receiving Water Risk:
Receiving water risk is based on whether a project drains to a sediment-sensitive waterbody. A
sediment-sensitive waterbody is either
on the most recent 303d list for waterbodies impaired for sediment;
has a USEPA-approved Total Maximum Daily Load implementation plan for sediment; or
has the beneficial uses of COLD, SPAWN, and MIGRATORY.
A project that meets at least one of the three criteria has a high receiving water risk. A list of sediment-
sensitive waterbodies will be posted on the State Water Board’s website. It is anticipated that an
interactive map of sediment sensitive water bodies in California will be available in the future.
The Risk Levels have been altered by eliminating the possibility of a Risk Level 4, and expanding the
constraints for Risk Levels 1, 2, and 3. Therefore, projects with high receiving water risk and high
sediment risk will be considered a Risk Level 3 risk to water quality.
In response to public comments, the Risk Level requirements have also been changed such that Risk
Level 1 projects will be subject to minimum BMP and visual monitoring requirements, Risk Level 2
projects will be subject to NALs and some additional monitoring requirements, and Risk Level 3 projects
will be subject to NALs, and more rigorous monitoring requirements such as receiving water monitoring
and in some cases bioassessment.
Table 7 - Combined Risk Level Matrix
Combined Risk Level Matrix Receiving Water Risk Sediment Risk
Low Medium High
Low Level 1 Level 2
High Level 2 Level 3
b. Effluent Standards
All dischargers are subject to the narrative effluent limitations specified in the General Permit. The
narrative effluent limitations require storm water discharges associated with construction activity to meet
all applicable provisions of Sections 301 and 402 of the CWA. These provisions require controls of
pollutant discharges that utilize BAT and BCT to reduce pollutants and any more stringent controls
necessary to meet water quality standards.
Risk Level 2 dischargers that pose a medium risk to water quality are subject to technology-based NALs
for pH and turbidity. Risk Level 3 dischargers that pose a high risk to water quality are also subject to
technology-based NALs for pH and turbidity.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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c. Good Housekeeping
Proper handling and managing of construction materials can help minimize threats to water quality. The
discharger must consider good housekeeping measures for: construction materials, waste management,
vehicle storage & maintenance, landscape materials, and potential pollutant sources. Examples include;
conducting an inventory of products used, implementing proper storage & containment, and properly
cleaning all leaks from equipment and vehicles.
d. Non-Storm Water Management
Non-storm water discharges directly connected to receiving waters or the storm drain system have the
potential to negatively impact water quality. The discharger must implement measures to control all non-
storm water discharges during construction, and from dewatering activities associated with construction.
Examples include; properly washing vehicles in contained areas, cleaning streets, and minimizing
irrigation runoff.
e. Erosion Control
The best way to minimize the risk of creating erosion and sedimentation problems during construction is
to disturb as little of the land surface as possible by fitting the development to the terrain. When
development is tailored to the natural contours of the land, little grading is necessary and, consequently,
erosion potential is lower.14 Other effective erosion control measures include: preserving existing
vegetation where feasible, limiting disturbance, and stabilizing and re-vegetating disturbed areas as soon
as possible after grading or construction activities. Particular attention must be paid to large, mass-
graded sites where the potential for soil exposure to the erosive effects of rainfall and wind is great and
where there is potential for significant sediment discharge from the site to surface waters. Until
permanent vegetation is established, soil cover is the most cost-effective and expeditious method to
protect soil particles from detachment and transport by rainfall. Temporary soil stabilization can be the
single most important factor in reducing erosion at construction sites. The discharger is required to
consider measures such as: covering disturbed areas with mulch, temporary seeding, soil stabilizers,
binders, fiber rolls or blankets, temporary vegetation, and permanent seeding. These erosion control
measures are only examples of what should be considered and should not preclude new or innovative
approaches currently available or being developed. Erosion control BMPs should be the primary means
of preventing storm water contamination, and sediment control techniques should be used to capture any
soil that becomes eroded.12
Risk Level 3 dischargers pose a higher risk to water quality and are therefore additionally required to
ensure that post-construction soil loss is equivalent to or less than the pre-construction levels.
f. Sediment Control
Sediment control BMPs should be the secondary means of preventing storm water contamination. When
erosion control techniques are ineffective, sediment control techniques should be used to capture any soil
that becomes eroded. The discharger is required to consider perimeter control measures such as:
installing silt fences or placing straw wattles below slopes. These sediment control measures are only
12 U.S. Environmental Protection Agency. 2007. Developing Your Storm Water Pollution Prevention Plan: A Guide
for Construction Sites.
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examples of what should be considered and should not preclude new or innovative approaches currently
available or being developed.
Because Risk Level 2 and 3 dischargers pose a higher risk to water quality, additional requirements for
the application of sediment controls are imposed on these projects. This General Permit also authorizes
the Regional Water Boards to require Risk Level 3 dischargers to implement additional site-specific
sediment control requirements if the implementation of other erosion or sediment controls are not
adequately protecting the receiving waters.
g. Run-on and Runoff Control
Inappropriate management of run-on and runoff can result in excessive physical impacts to receiving
waters from sediment and increased flows. The discharger is required to manage all run-on and runoff
from a project site. Examples include: installing berms and other temporary run-on and runoff diversions.
Risk Level 1 dischargers with lower risks to impact water quality are not subject to the run-on and runoff
control requirements unless an evaluation deems them necessary or visual inspections show that such
controls are required.
h. Inspection, Maintenance and Repair
All measures must be periodically inspected, maintained and repaired to ensure that receiving water
quality is protected. Frequent inspections coupled with thorough documentation and timely repair is
necessary to ensure that all measures are functioning as intended.
i. Rain Event Action Plan (REAP)
A Rain Event Action Plan (REAP) is a written document, specific for each rain event. A REAP should be
designed that when implemented it protects all exposed portions of the site within 48 hours of any likely
precipitation event forecast of 50% or greater probability.
This General Permit requires Risk Level 2 and 3 dischargers to develop and implement a REAP designed
to protect all exposed portions of their sites within 48 hours prior to any likely precipitation event. The
REAP requirement is designed to ensure that the discharger has adequate materials, staff, and time to
implement erosion and sediment control measures that are intended to reduce the amount of sediment
and other pollutants generated from the active site. A REAP must be developed when there is likely a
forecast of 50% or greater probability of precipitation in the project area. (The National Oceanic and
Atmospheric Administration (NOAA) defines a chance of precipitation as a probability of precipitation of
30% to 50% chance of producing precipitation in the project area.13 NOAA defines the probability of
precipitation (PoP) as the likelihood of occurrence (expressed as a percent) of a measurable amount
(0.01 inch or more) of liquid precipitation (or the water equivalent of frozen precipitation) during a
specified period of time at any given point in the forecast area.) Forecasts are normally issued for 12-
hour time periods. Descriptive terms for uncertainty and aerial coverage are used as follows:
Table 8 -National Oceanic and Atmospheric Administration (NOAA) Definition of Probability of
Precipitation (PoP)
13 http://www.crh.noaa.gov/lot/severe/wxterms.php.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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PoP
Expressions of
Uncertainty
Aerial
Coverage
0% none used none used
10% none used isolated
20% slight chance isolated
30-50% chance scattered
60-70% likely numerous
80-100% none used none used
The discharger must obtain the precipitation forecast information from the National Weather Service
Forecast Office (http://www.srh.noaa.gov/).
2. Linear Projects
a. Linear Risk Determination
LUPs vary in complexity and water quality concerns based on the type of project. This General Permit
has varying application requirements based on the project’s risk to water quality. Factors that lead to the
characterization of the project include location, sediment risk, and receiving water risk.
Based on the location and complexity of a project area or project section area, LUPs are separated into
project types. As described below, LUPs have been categorized into three project types.
i. Type 1 LUPs
Type 1 LUPs are those construction projects where:
(1) 70 percent or more of the construction activity occurs on a paved surface and
where areas disturbed during construction will be returned to preconstruction
conditions or equivalent protection established at the end of the construction
activities for the day, or
(2) greater than 30 percent of construction activities occur within the non-paved
shoulders or land immediately adjacent to paved surfaces, or where construction
occurs on unpaved improved roads, including their shoulders or land immediately
adjacent to them where:
Areas disturbed during construction will be returned to pre-construction conditions or equivalent
protection established at the end of the construction activities for the day to minimize the potential for
erosion and sediment deposition, and
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Areas where established vegetation was disturbed during construction will be stabilized and re-vegetated
by the end of project. When required, adequate temporary stabilization Best Management Practices
(BMPs) will be installed and maintained until vegetation is established to meet minimum cover
requirements established in this General Permit for final stabilization.
Type 1 LUPs typically do not have a high potential to impact storm water quality because (1) these
construction activities are not typically conducted during a rain event, (2) these projects are normally
constructed over a short period of time14, minimizing the duration that pollutants could potentially be
exposed to rainfall; and (3) disturbed soils such as those from trench excavation are required to be
hauled away, backfilled into the trench, and/or covered (e.g., metal plates, pavement, plastic covers over
spoil piles) at the end of the construction day.
Type 1 LUPs are determined during the risk assessment found in Attachment A.1 to be 1) low sediment
risk and low receiving water risk; 2) low sediment risk and medium receiving water risk; and 3) medium
sediment risk and low receiving water risk.
This General Permit requires the discharger to ensure a SWPPP is developed for these construction
activities that is specific to project type, location and characteristics.
ii. Type 2 LUPs:
Type 2 projects are determined to have a combination of High, Medium, and Low project sediment risk
along with High, Medium, and Low receiving water risk. Like Type 1 projects, Type 2 projects are
typically constructed over a short period of time. However, these projects have a higher potential to
impact water quality because they:
(1) typically occur outside the more urban/developed areas;
(2) have larger areas of soil disturbance that are not closed or restored at the end of
the day;
(3) may have onsite stockpiles of soil, spoil and other materials;
(4) cross or occur in close proximity to a wide variety of sensitive resources that may
include, but are not limited to, steep topography and/or water bodies; and
(5) have larger areas of disturbed soils that may be exposed for a longer time
interval before final stabilization, cleanup and/or reclamation occurs.
This General Permit requires the discharger to develop and implement a SWPPP for these construction
activities that are specific for project type, location and characteristics.
iii. Type 3 LUPs:
14 Short period of time refers to a project duration of weeks to months, but typically less than one year in duration.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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Type 3 projects are determined to have a combination of High and Medium project sediment risk along
with High and Medium receiving water risk. Similar to Type 2 projects, Type 3 projects have a higher
potential to impact water quality because they:
(1) typically occur outside of the more urban/developed areas;
(2) have larger areas of soil disturbance that are not closed or restored at the end of
the day;
(3) may have onsite stockpiles of soil, spoil and other materials;
(4) cross or occur in close proximity to a wide variety of sensitive resources that may
include, but are not limited to, steep topography and/or water bodies; and
(5) have larger areas of disturbed soils that may be exposed for a longer time
interval before final stabilization, cleanup and/or reclamation occurs.
This General Permit requires the discharger to develop and implement a SWPPP for these construction
activities that are specific for project type, location, and characteristics.
b. Linear Effluent Standards
All LUPs are subject to the narrative effluent limitations specified in the General Permit.
Type 2 and Type 3 projects are subject to technology-based NALs for pH and turbidity.
c. Linear Good Housekeeping
Improper use and handling of construction materials could potentially cause a threat to water quality. In
order to ensure proper site management of these construction materials, all LUP dischargers must
comply with a minimum set of Good Housekeeping measures specified in Attachment A of this General
Permit.
d. Linear Non-Storm Water Management
In order to ensure control of all non-storm water discharges during construction, all LUP dischargers must
comply with the Non-Storm Water Management measures specified in Attachment A of this General
Permit.
e. Linear Erosion Control
This General Permit requires all LUP dischargers to implement effective wind erosion control measures,
and soil cover for inactive areas. Type 3 LUPs posing a higher risk to water quality are additionally
required to ensure the post-construction soil loss is equivalent to or less than the pre-construction levels.
f. Linear Sediment Control
In order to ensure control and containment of all sediment discharges, all LUP dischargers must comply
with the general Sediment Control measures specified in Attachment A or this General Permit. Additional
requirements for sediment controls are imposed on Type 2 & 3 LUPs due to their higher risk to water
quality.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
35
g. Linear Run-on and Runoff Control
Discharges originating outside of a project’s perimeter and flowing onto the property can adversely affect
the quantity and quality of discharges originating from a project site. In order to ensure proper
management of run-on and runoff, all LUPs must comply with the run-on and runoff control measures
specified in Attachment A of this General Permit. Due to the lower risk of impacting water quality, Type 1
LUPs are not required to implement run-on and runoff controls unless deemed necessary by the
discharger.
h. Linear Inspection, Maintenance and Repair
Proper inspection, maintenance, and repair activities are important to ensure the effectiveness of on-site
measures to control water quality. In order to ensure that inspection, maintenance, and repair activities
are adequately performed, the all LUP dischargers a re required to comply with the Inspection,
Maintenance, and Repair requirements specified in Attachment A of this General Permit.
K. ATS15 Requirements
There are instances on construction sites where traditional erosion and sediment controls do not
effectively control accelerated erosion. Under such circumstances, or under circumstances where storm
water discharges leaving the site may cause or contribute to an exceedance of a water quality standard,
the use of an Active Treatment System (ATS) may be necessary. Additionally, it may be appropriate to
use an ATS when site constraints inhibit the ability to construct a correctly sized sediment basin, when
clay and/or highly erosive soils are present, or when the site has very steep or long slope lengths.16
Although treatment systems have been in use in some form since the mid-1990s, the ATS industry in
California is relatively young, and detailed regulatory standards have not yet been developed. Many
developers are using these systems to treat storm water discharges from their construction sites. The
new ATS requirements set forth in this General Permit are based on those in place for small wastewater
treatment systems, ATS regulations from the Central Valley Regional Water Quality Control Board
(September 2005 memorandum “2005/2006 Rainy Season – Monitoring Requirements for Storm Water
Treatment Systems that Utilize Chemical Additives to Enhance Sedimentation”), the Construction Storm
Water Program at the State of Washington’s Department of Ecology, as well as recent advances in
technology and knowledge of coagulant performance and aquatic safety.
The effective design of an ATS requires a detailed survey and analysis of site conditions. With proper
planning, ATS performance can provide exceptional water quality discharge and prevent significant
impacts to surface water quality, even under extreme environmental conditions.
These systems can be very effective in reducing the sediment in storm water runoff, but the systems that
use additives/polymers to enhance sedimentation also pose a potential risk to water quality (e.g.,
operational failure, equipment failure, additive/polymer release, etc.). The State Water Board is
concerned about the potential acute and chronic impacts that the polymers and other chemical additives
may have on fish and aquatic organisms if released in sufficient quantities or concentrations. In addition
15 An ATS is a treatment system that employs chemical coagulation, chemical flocculation, or electrocoagulation in
order to reduce turbidity caused by fine suspended sediment. 16 Pitt, R., S. Clark, and D. Lake. 2006. Construction Site Erosion and Sediment Controls: Planning, Design, and
Performance. DEStech Publications. Lancaster, PA. 370pp.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
36
to anecdotal evidence of polymer releases causing aquatic toxicity in California, the literature supports
this concern.17 For example, cationic polymers have been shown to bind with the negatively charged gills
of fish, resulting in mechanical suffocation.18 Due to the potential toxicity impacts, which may be caused
by the release of additives/polymers into receiving waters, this General Permit establishes residual
polymer monitoring and toxicity testing requirements have been established in this General Permit for
discharges from construction sites that utilize an ATS in order to protect receiving water quality and
beneficial uses.
The primary treatment process in an ATS is coagulation/flocculation. ATS’s operate on the principle that
the added coagulant is bound to suspended sediment, forming floc, which is gravitationally settled in
tanks or a basin, or removed by sand filters. A typical installation utilizes an injection pump upstream
from the clarifier tank, basin, or sand filters, which is electronically metered to both flow rate and
suspended solids level of the influent, assuring a constant dose. The coagulant mixes and reacts with the
influent, forming a dense floc. The floc may be removed by gravitational setting in a clarifier tank or
basin, or by filtration. Water from the clarifier tank, basin, or sand filters may be routed through
cartridge(s) and/or bag filters for final polishing. Vendor-specific systems use various methods of dose
control, sediment/floc removal, filtration, etc., that are detailed in project-specific documentation. The
particular coagulant/flocculant to be used for a given project is determined based on the water chemistry
of the site because the coagulants are specific in their reactions with various types of sediments.
Appropriate selection of dosage must be carefully matched to the characteristics of each site.
ATS’s are operated in two differing modes, either Batch or Flow-Through. Batch treatment can be
defined as Pump-Treat-Hold-Test-Release. In Batch treatment, water is held in a basin or tank, and is
not discharged until treatment is complete. Batch treatment involves holding or recirculating the treated
water in a holding basin or tank(s) until treatment is complete or the basin or storage tank(s) is full. In
Flow-Through treatment, water is pumped into the ATS directly from the runoff collection system or storm
water holding pond, where it is treated and filtered as it flows through the system, and is then directly
discharged. “Flow-Through Treatment” is also referred to as “Continuous Treatment.”
1. Effluent Standards
This General Permit establishes NELs for discharges from construction sites that utilize an ATS. These
systems lend themselves to NELs for turbidity and pH because of their known reliable treatment.
Advanced systems have been in use in some form since the mid-1990s. An ATS is considered reliable,
can consistently produce a discharge of less than 10 NTU, and has been used successfully at many sites
in several states since 1995 to reduce turbidity to very low levels.19
This General Permit contains “compliance storm event” exceptions from the technology-based NELs for
ATS discharges. The rationale is that technology-based requirements are developed assuming a certain
design storm. In the case of ATS the industry-standard design storm is 10-year, 24-hour (as stated in
17 RomØen, K., B. Thu, and Ø. Evensen. 2002. Immersion delivery of plasmid DNA II. A study of the potentials of a
chitosan based delivery system in rainbow trout (Oncorhynchus mykiss) fry. Journal of Controlled Release 85: 215-
225. 18 Bullock, G., V. Blazer, S. Tsukuda, and S. Summerfelt. 2000. Toxicity of acidified chitosan for cultured rainbow
trout (Oncorhynchus mykiss). Aquaculture 185:273-280. 19 Currier, B., G. Minton, R. Pitt, L. Roesner, K. Schiff, M. Stenstrom, E. Strassler, and E. Strecker. 2006. The
Feasibility of Numeric Effluent Limits Applicable to Discharges of Storm Water Associated with Municipal, Industrial
and Construction Activities.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
37
Attachment F of this General Permit), so the compliance storm event has been established as the 10-year
24-hour event as well to provide consistency.
2. Training
Operator training is critical to the safe and efficient operation and maintenance of the ATS, and to ensure
that all State Water Board monitoring and sampling requirements are met. The General Permit requires
that all ATS operators have training specific to using ATS’s liquid coagulants.
L. Post-Construction Requirements
Under past practices, new and redevelopment construction activities have resulted in modified natural
watershed and stream processes. This is caused by altering the terrain, modifying the vegetation and soil
characteristics, introducing impervious surfaces such as pavement and buildings, increasing drainage
density through pipes and channels, and altering the condition of stream channels through straightening,
deepening, and armoring. These changes result in a drainage system where sediment transport capacity
is increased and sediment supply is decreased. A receiving channel’s response is dependent on
dominant channel materials and its stage of adjustment.
Construction activity can lead to impairment of beneficial uses in two main ways. First, during the actual
construction process, storm water discharges can negatively affect the chemical, biological, and physical
properties of downstream receiving waters. Due to the disturbance of the landscape, the most likely
pollutant is sediment, however pH and other non-visible pollutants are also of great concern. Second,
after most construction activities are completed at a construction site, the finished project may result in
significant modification of the site’s response to precipitation. New development and redevelopment
projects have almost always resulted in permanent post-construction water quality impacts because more
precipitation ends up as runoff and less precipitation is intercepted, evapotranspired, and infiltrated.
General Permit 99-08-DWQ required the SWPPP to include a description of all post-construction BMPs
on a site and a maintenance schedule. An effective storm water management strategy must address the
full suite of storm events (water quality, channel protection, overbank flood protection, extreme flood
protection) (Figure 2).
Figure 2 - Suite of Storm Events
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
38
The post-construction storm water performance standards in this General Permit specifically address
water quality and channel protection events. Overbank flood protection and extreme flood protection
events are traditionally dealt with in local drainage and flood protection ordinances. However, measures
in this General Permit to address water quality and channel protection also reduce overbank and extreme
flooding impacts. This General Permit aims to match post-construction runoff to pre-construction runoff
for the 85th percentile storm event, which not only reduces the risk of impact to the receiving water’s
channel morphology but also provides some protection of water quality.
This General Permit clarifies that its runoff reduction requirements only apply to projects that lie outside of
jurisdictions covered by a Standard Urban Storm water Management Plan (SUSMP) (or other more
protective) post-construction requirements in either Phase I or Phase II permits.
Figures 3 and 4, below, show the General Permit enrollees (to Order 99-08-DWQ, as of March 10, 2008)
overlaid upon a map with SUSMP (or more protective) areas in blue and purple. Areas without blue or
purple indicate where the General Permit’s runoff reduction requirements would actually apply.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
39
Figure 3 - Northern CA (2009) Counties / Cities With SUSMP-Plus Coverage
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
40
Figure 4 - Southern CA (2009) Counties / Cities With SUSMP-Plus Coverage
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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Water Quality:
This General Permit requires dischargers to replicate the pre-project runoff water balance (defined as the
amount of rainfall that ends up as runoff) for the smallest storms up to the 85th percentile storm event, or
the smallest storm event that generates runoff, whichever is larger. Contemporary storm water
management generally routes these flows directly to the drainage system, increasing pollutant loads and
potentially causing adverse effects on receiving waters. These smaller water quality events happen much
more frequently than larger events and generate much higher pollutant loads on an annual basis. There
are other adverse hydrological impacts that result from not designing according to the site’s pre-
construction water balance. In Maryland, Klein20 noted that baseflow decreases as the extent of
urbanization increases. Ferguson and Suckling21 noted a similar relation in watersheds in Georgia. On
Long Island, Spinello and Simmons22 noted substantial decreases in base flow in intensely urbanized
watersheds.
The permit emphasizes runoff reduction through on-site storm water reuse, interception, evapo-
transpiration and infiltration through non-structural controls and conservation design measures (e.g.,
downspout disconnection, soil quality preservation/enhancement, interceptor trees). Employing these
measures close to the source of runoff generation is the easiest and most cost-effective way to comply
with the pre-construction water balance standard. Using low-tech runoff reduction techniques close to the
source is consistent with a number of recommendations in the literature.23 In many cases, BMPs
implemented close to the source of runoff generation cost less than end-of the pipe measures.24
Dischargers are given the option of using Appendix 2 to calculate the required runoff volume or a
watershed process-based, continuous simulation model such as the EPA’s Storm Water Management
Model (SWMMM) or Hydrologic Simulation Program Fortran (HSPF). Such methods used by the
discharger will be reviewed by the Regional Water Board upon NOT application.
Channel Protection:
In order to address channel protection, a basic understanding of fluvial geomorphic concepts is
necessary. A dominant paradigm in fluvial geomorphology holds that streams adjust their channel
dimensions (width and depth) in response to long-term changes in sediment supply and bankfull
discharge (1.5 to 2 year recurrence interval). The bankfull stage corresponds to the discharge at which
channel maintenance is the most effective, that is, the discharge at which the moving sediment, forming
or removing bars, forming or changing bends and meanders, and generally doing work that results in the
average morphologic characteristics of channels. 25 Lane (1955 as cited in Rosgen 199626) showed the
generalized relationship between sediment load, sediment size, stream discharge and stream slope in
20 Klein 1979 as cited in Delaware Department of Natural Resources (DDNR). 2004. Green Technology: The
Delaware Urban Runoff Management Approach. Dover, DE. 117 pp. 21 Ferguson and Suckling 1990 as cited Delaware Department of Natural Resources (DDNR). 2004. Green
Technology: The Delaware Urban Runoff Management Approach. Dover, DE. 117 pp. 22 Center for Watershed Protection (CWP). 2000. The Practice of Watershed Protection: Techniques for protecting
our nation’s streams, lakes, rivers, and estuaries. Ellicott City, MD. 741 pp. 23 Bay Area Storm Water Management Agencies Association (BASMAA). 1997. Start at the Source: Residential Site
Planning and Design Guidance Manual for Storm Water Quality Protection. Palo Alto, CA;
McCuen, R.H. 2003 Smart Growth: hydrologic perspective. Journal of Professional Issues in Engineering Education
and Practice. Vol (129), pp.151-154;
Moglen, G.E. and S. Kim. 2007. Impervious imperviousness-are threshold based policies a good idea? Journal of the
American Planning Association, Vol 73 No. 2. pp 161-171. 24 Delaware Department of natural Resources (DDNR). 2004. Green technology: The Delaware urban Runoff
Management Approcah. Dover, DE. 117 pp. 25 Dunne, T and L.B. Leopold. 1978. Water in Environmental Planning. San Francisco W.H. Freeman and Company 26 Rosgen. D.L. 1996. Applied River Morphology. Pagosa Springs. Wildland Hydrology
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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Figure 5. A change in any one of these variables sets up a series of mutual adjustments in the
companion variables with a resulting direct change in the physical characteristics of the stream channel.
Figure 5 - Schematic of the Lane Relationship
After Lane (1955) as cited in Rosgen (1996)
Stream slope multiplied by stream discharge (the right side of the scale) is essentially an approximation of
stream power, a unifying concept in fluvial geomorphology (Bledsoe 1999). Urbanization generally
increases stream power and affects the resisting forces in a channel (sediment load and sediment size
represented on the left side of the scale).
During construction, sediment loads can increase from 2 to 40,000 times over pre-construction levels.27
Most of this sediment is delivered to stream channels during large, episodic rain events.28 This increased
sediment load leads to an initial aggradation phase where stream depths may decrease as sediment fills
the channel, leading to a decrease in channel capacity and increase in flooding and overbank deposition.
A degradation phase initiates after construction is completed.
Schumm et. al (1984) developed a channel evolution model that describes the series of adjustments from
initial downcutting, to widening, to establishing new floodplains at lower elevations (Figure 6).
27 Goldman S.J., K. Jackson, and T.A. Bursztynsky. 1986. Erosion and Sediment Control Handbook. McGraw Hill.
San Francisco. 28 Wolman 1967 as cited in Paul, M.P. and J.L. Meyer. 2001. Streams in the Urban Landscape. Annu. Rev.Ecol.
Syst. 32: 333-365.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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Figure 6 - Channel Changes Associated with Urbanization
After Incised Channel Evolution Sequence in Schumm et. al 1984
Channel incision (Stage II) and widening (Stages III and to a lesser degree, Stage IV) are due to a
number of fundamental changes on the landscape. Connected impervious area and compaction of
pervious surfaces increase the frequency and volume of bankfull discharges.29 Increased drainage
density (miles of stream length per square mile of watershed) also negatively impacts receiving stream
channels.30 Increased drainage density and hydraulic efficiency leads to an increase in the frequency
and volume of bankfull discharges because the time of concentration is shortened. Flows from
engineered pipes and channels are also often “sediment starved” and seek to replenish their sediment
supply from the channel.
Encroachment of stream channels can also lead to an increase in stream slope, which leads to an
increase in stream power. In addition, watershed sediment loads and sediment size (with size generally
represented as the median bed and bank particle size, or d50) decrease during urbanization.31 This means
29 Booth, D. B. and C. R. Jackson. 1997. Urbanization of Aquatic Systems: Degradation Thresholds,
Storm Water Detection, and the Limits of Mitigation. Journal of the American Water Resources
Association Vol. 33, No.5, pp. 1077-1089. 30 May, C.W. 1998. Cumulative effects of urbanization on small streams in the Puget Sound Lowland ecoregion.
Conference proceedings from Puget Sound Research '98 held March 12, 13 1998 in Seattle, WA;
Santa Clara Valley Urban Runoff Pollution Prevention Program. 2002. Hydromodification Management Plan
Literature Review. 80 pp. 31 Finkenbine, J.K., D.S. Atwater, and D.S. Mavinic. 2000. Stream health after urbanization. J. Am. Water Resour.
Assoc. 36:1149-60;
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that even if pre- and post-development stream power are the same, more erosion will occur in the post-
development stage because the smaller particles are less resistant (provided they are non-cohesive).
As shown in Stages II and III, the channel deepens and widens to accommodate the increased stream
power 32and decrease in sediment load and sediment size. Channels may actually narrow as entrained
sediment from incision is deposited laterally in the channel. After incised channels begin to migrate
laterally (Stage III), bank erosion begins, which leads to general channel widening.33 At this point, a
majority of the sediment that leaves a drainage area comes from within the channel, as opposed to the
background and construction related hillslope contribution. Stage IV is characterized by more aggradation
and localized bank instability. Stage V represents a new quasi-equilibrium channel morphology in
balance with the new flow and sediment supply regime. In other words, stream power is in balance with
sediment load and sediment size.
The magnitude of the channel morphology changes discussed above varies along a stream network as
well as with the age of development, slope, geology (sand-bedded channels may cycle through the
evolution sequence in a matter of decades whereas clay-dominated channels may take much longer),
watershed sediment load and size, type of urbanization, and land use history. It is also dependent on a
channel’s stage in the channel evolution sequence when urbanization occurs. Management strategies
Pizzuto, J.E. W.S. Hession, and M. McBride. 2000. Comparing gravel-bed rivers in paired urban and rural
catchments of southeastern Pennsylvania. Geology 28:79-82. 32 Hammer 1973 as cited in Delaware Department of Natural Resources (DDNR). 2004. Green Technology: The
Delaware Urban Runoff Management Approach. Dover, DE. 117 pp;
Booth, D.B. 1990. Stream Channel Incision Following Drainage Basin Urbanization. Water Resour. Bull. 26:407-
417. 33 Trimble, S.W. 1997. Contribution of Stream Channel Erosion to Sediment Yield from an Urbanizing Watershed.
Science: Vol. 278 (21), pp. 1442-1444.
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must take into account a channel’s stage of adjustment and account for future changes in the evolution of
channel form (Stein and Zaleski 2005). 34
Traditional structural water quality BMPs (e.g. detention basins and other devices used to store volumes
of runoff) unless they are highly engineered to provide adequate flow duration control, do not adequately
protect receiving waters from accelerated channel bed and bank erosion, do not address post-
development increases in runoff volume, and do not mitigate the decline in benthic macroinvertebrate
communities in the receiving waters35 suggest that structural BMPs are not as effective in protecting
aquatic communities as a continuous riparian buffer of native vegetation. This is supported by the
findings of Zucker and White36, where instream biological metrics were correlated with the extent of
forested buffers.
This General Permit requires dischargers to maintain pre-development drainage densities and times of
concentration in order to protect channels and encourages dischargers to implement setbacks to reduce
channel slope and velocity changes that can lead to aquatic habitat degradation.
There are a number of other approaches for modeling fluvial systems, including statistical and physical
models and simpler stream power models.37 The use of these models in California is described in Stein
and Zaleski (2005).38 Rather than prescribe a specific one-size-fits-all modeling method in this permit, the
State Water Board intends to develop a stream power and channel evolution model-based framework to
assess channels and develop a hierarchy of suitable analysis methods and management strategies. In
time, this framework may become a State Water Board water quality control policy.
Permit Linkage to Overbank and Extreme Flood Protection
Site design BMPs (e.g. rooftop and impervious disconnection, vegetated swales, setbacks and buffers)
filter and settle out pollutants and provide for more infiltration than is possible for traditional centralized
structural BMPs placed at the lowest point in a site. They provide source control for runoff and lead to a
reduction in pollutant loads. When implemented, they also help reduce the magnitude and volume of
larger, less frequent storm events (e.g., 10-yr, 24-hour storm and larger), thereby reducing the need for
expensive flood control infrastructure. Nonstructural BMPs can also be a landscape amenity, instead of a
large isolated structure requiring substantial area for ancillary access, buffering, screening and
maintenance facilities.25 The multiple benefits of using non-structural benefits will be critically important as
the state’s population increases and imposes strains upon our existing water resources.
Maintaining predevelopment drainage densities and times of concentration will help reduce post-
development peak flows and volumes in areas not covered under a municipal permit. The most effective
way to preserve drainage areas and maximize time of concentration is to implement landform grading,
34 Stein, E.S. and S. Zaleski. 2005.Managing runoff to protect natural stream: the latest developments on
investigation and management of hydromodification in California. Southern California Coastal Water Research
Project Technical Report 475. 26 pp. 35 Horner, R.R. 2006. Investigation of the Feasibility and Benefits of Low-Impact Site Design Practices (LID) for the
San Diego Region. Available at: http://www.projectcleanwater.org/pdf/permit/case-study_lid.pdf. 36 Delaware Department of Natural Resources (DDNR). 2004. Green Technology: The Delaware Urban Runoff
Management Approach. Dover, DE. 117 pp. 37 Finlayson, D.P. and D.R. Montgomery. 2003. Modeling large-scale fluvial erosion in geographic information
systems. Geomorphology (53), pp. 147-164). 38 Stein, E.S. and S. Zaleski. 2005.Managing runoff to protect natural stream: the latest developments on
investigation and management of hydromodification in California. Southern California Coastal Water Research
Project Technical Report 475. 26 pp.
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incorporate site design BMPs and implement distributed structural BMPs (e.g., bioretention cells, rain
gardens, rain cisterns).
M. Storm Water Pollution Prevention Plans
USEPA’s Construction General Permit requires that qualified personnel conduct inspections. USEPA
defines qualified personnel as “a person knowledgeable in the principles and practice of erosion and
sediment controls who possesses the skills to assess conditions at the construction site that could impact
storm water quality and to assess the effectiveness of any sediment and erosion control measures
selected to control the quality of storm water discharges from the construction activity.”39 USEPA also
suggests that qualified personnel prepare SWPPPs and points to numerous states that require certified
professionals to be on construction sites at all times. States that currently have certification programs are
Washington, Georgia, Florida, Delaware, Maryland, and New Jersey. The Permit 99-08-DWQ did not
require that qualified personnel prepare SWPPPs or conduct inspections. However, to ensure that water
quality is being protected, this General Permit requires that all SWPPPs be written, amended, and
certified by a Qualified SWPPP Developer. A Qualified SWPPP Developer must possess one of the eight
certifications and or registrations specified in this General Permit and effective two years after the
adoption date of this General Permit, must have attended a State Water Board-sponsored or approved
Qualified SWPPP Developer training course. Table 9 provides an overview of the criteria used in
determining qualified certification titles for a QSD and QSP.
39 US Environmental Protection Agency. Stormwater Pollution Prevention Plans for Construction Activities.
<http://cfpub.epa.gov/npdes/stormwater/swppp.cfm> and <http://www.epa.gov/npdes/pubs/sw_swppp_guide.pdf>.
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
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Table 9 - Qualified SWPPP Developer/ Qualified SWPPP Practitioner Certification Criteria
Certification/ Title Registered By QSD/QSP Certification Criteria
Professional Civil
Engineer California
Both
1. Approval Process
2. Code of Ethics
3. Accountability
4. Pre-requisites
Professional
Geologist or
Engineering
Geologist
California
Both
1. Approval Process
2. Code of Ethics
3. Accountability
4. Pre-requisites
Landscape
Architect California
Both
1. Approval Process
2. Code of Ethics
3. Accountability
4. Pre-requisites
Professional
Hydrologist
American Institute of
Hydrology
Both
1. Approval Process
2. Code of Ethics
3. Accountability
4. Pre-requisites
Certified
Professional in
Erosion and
Sediment
Control™
(CPESC)
Enviro Cert International
Inc.
Both
1. Approval Process
2. Code of Ethics
3. Accountability
4. Pre-requisites
5. Continuing Education
Certified Inspector
of Sediment and
Erosion ControlTM
(CISEC)
Certified Inspector of
Sediment and Erosion
Control, Inc.
QSP
1. Approval Process
2. Code of Ethics
3. Accountability
4. Pre-requisites
5. Continuing Education
Certified Erosion,
Sediment and
Storm Water
Inspector™
(CESSWI)
Enviro Cert International
Inc.
QSP
1. Approval Process
2. Code of Ethics
3. Accountability
4. Pre-requisites
5. Continuing Education
Certified
Professional in
Storm Water
Quality™
(CPSWQ)
Enviro Cert International
Inc.
Both
1. Approval Process
2. Code of Ethics
3. Accountability
4. Pre-requisites
5. Continuing Education
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48
The previous versions of the General Permit required development and implementation of a SWPPP as
the primary compliance mechanism. The SWPPP has two major objectives: (1) to help identify the
sources of sediment and other pollutants that affect the quality of storm water discharges; and (2) to
describe and ensure the implementation of BMPs to reduce or eliminate sediment and other pollutants in
storm water and non-storm water discharges. The SWPPP must include BMPs that address source
control, BMPs that address pollutant control, and BMPs that address treatment control.
This General Permit shifts some of the measures that were covered by this general requirement to
specific permit requirements, each individually enforceable as a permit term. This General Permit
emphasizes the use of appropriately selected, correctly installed and maintained pollution reduction
BMPs. This approach provides the flexibility necessary to establish BMPs that can effectively address
source control of pollutants during changing construction activities. These specific requirements also
improve both the clarity and the enforceability of the General Permit so that the dischargers understand,
and the public can determine whether the discharges are in compliance with, permit requirements.
The SWPPP must be implemented at the appropriate level to protect water quality at all times throughout
the life of the project. The SWPPP must remain on the site during construction activities, commencing
with the initial mobilization and ending with the termination of coverage under the General Permit. For
LUPs the discharger shall make the SWPPP available at the construction site during working hours while
construction is occurring and shall be made available upon request by a State or Municipal inspector.
When the original SWPPP is retained by a crewmember in a construction vehicle and is not currently at
the construction site, current copies of the BMPs and map/drawing will be left with the field crew and the
original SWPPP shall be made available via a request by radio or telephone. Once construction activities
are complete, until stabilization is achieved, the SWPPP shall be available from the SWPPP contact listed
in the PRDs
A SWPPP must be appropriate for the type and complexity of a project and will be developed and
implemented to address project specific conditions. Some projects may have similarities or complexities,
yet each project is unique in its progressive state that requires specific description and selection of BMPs
needed to address all possible generated pollutants
N. Regional Water Board Authorities
Because this General Permit will be issued to thousands of construction sites across the State, the
Regional Water Boards retain discretionary authority over certain issues that may arise from the
discharges in their respective regions. This General Permit does not grant the Regional Water Boards
any authority they do not otherwise have; rather, it merely emphasizes that the Regional Water Boards
can take specific actions related to this General Permit. For example, the Regional Water Boards will be
enforcing this General Permit and may need to adjust some requirements for a discharger based on the
discharger’s compliance history.
State Water Resources Control Board
Division of Water Quality
1001 I Street • Sacramento, California 95814 • (916) 341-5455
Mailing Address: P.O. Box 100 • Sacramento, California • 95812-0100
Fax (916) 341-5463 • http://www.waterboards.ca.gov
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
Linda S. Adams
Secretary for
Environmental Protection
Arnold Schwarzenegger Governor
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES)
GENERAL PERMIT FOR
STORM WATER DISCHARGES
ASSOCIATED WITH CONSTRUCTION AND LAND DISTURBANCE
ACTIVITIES
ORDER NO. 2009-0009-DWQ
NPDES NO. CAS000002
IT IS HEREBY ORDERED, that this Order supersedes Order No. 99-08-DWQ
[as amended by Order No. 2010-0014-DWQ] except for enforcement purposes.
The Discharger shall comply with the requirements in this Order to meet the
provisions contained in Division 7 of the California Water Code (commencing
with section 13000) and regulations adopted thereunder, and the provisions of
the federal Clean Water Act and regulations and guidelines adopted thereunder.
I, Jeanine Townsend, Clerk to the Board, do hereby certify that this Order with all
attachments is a full, true, and correct copy of an Order adopted by the State
Water Resources Control Board, on September 2, 2009.
AYE: Vice Chair Frances Spivy-Weber
Board Member Arthur G. Baggett, Jr.
Board Member Tam M. Doduc
NAY: Chairman Charles R. Hoppin
ABSENT: None
ABSTAIN: None
Jeanine Townsend
Clerk to the Board
This Order was adopted by the State Water Resources Control
Board on: September 2, 2009
This Order shall become effective on: July 1, 2010
This Order shall expire on: September 2, 2014
State Water Resources Control Board
Division of Water Quality
1001 I Street • Sacramento, California 95814 • (916) 341-5455
Mailing Address: P.O. Box 100 • Sacramento, California • 95812-0100
Fax (916) 341-5463 • http://www.waterboards.ca.gov
Linda S. Adams
Secretary for
Environmental Protection
Arnold Schwarzenegger Governor
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES)
GENERAL PERMIT FOR
STORM WATER DISCHARGES
ASSOCIATED WITH CONSTRUCTION AND LAND DISTURBANCE
ACTIVITIES
ORDER NO. 2010-0014-DWQ
NPDES NO. CAS000002
Order No. 2009-0009-DWQ was adopted by the State Water
Resources Control Board on: September 2, 2009
Order No. 2009-0009-DWQ became effective on: July 1, 2010
Order No. 2009-0009-DWQ shall expire on: September 2, 2014
This Order, which amends Order No. 2009-0009-DWQ, was
adopted by the State Water Resources Control Board on: November 16, 2010
This Order shall become effective on: February 14, 2011
IT IS HEREBY ORDERED that this Order amends Order No. 2009-0009-DWQ.
Additions to Order No. 2009-0009-DWQ are reflected in blue-underline text and
deletions are reflected in red-strikeout text.
IT IS FURTHER ORDERED that staff are directed to prepare and post a
conformed copy of Order No. 2009-0009-DWQ incorporating the revisions made
by this Order.
I, Jeanine Townsend, Clerk to the Board, do hereby certify that this Order with all
attachments is a full, true, and correct copy of an Order adopted by the State
Water Resources Control Board, on November 16, 2010.
AYE: Chairman Charles R. Hoppin
Vice Chair Frances Spivy-Weber
Board Member Arthur G. Baggett, Jr.
Board Member Tam M. Doduc
NAY: None
ABSENT: None
ABSTAIN: None
Jeanine Townsend
Clerk to the Board
i
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES)
GENERAL PERMIT FOR
STORM WATER DISCHARGES
ASSOCIATED WITH CONSTRUCTION AND LAND DISTURBANCE ACTIVITIES
ORDER NO. 2012-0006-DWQ
NPDES NO. CAS000002
IT IS HEREBY ORDERED that this Order amends Order No. 2009-0009-DWQ. Additions to
Order No. 2009-0009-DWQ are reflected in blue-underline text and deletions are reflected in
red-strikeout text.
IT IS FURTHER ORDERED that staff are directed to prepare and post a conformed copy of
Order No. 2009-000-DWQ incorporating the revisions made by this Order.
I, Jeanine Townsend, Clerk to the Board, do hereby certify that this Order with all attachments is
a full, true, and correct copy of an Order adopted by the State Water Resources Control Board,
on July 17, 2012.
AYE: Chairman Charles R. Hoppin
Vice Chair Frances Spivy-Weber
Board Member Tam M. Doduc
Board Member Steven Moore
Board Member Felicia Marcus
NAY: None
ABSENT: None
ABSTAIN: None
Jeanine Townsend
Clerk to the Board
Order No. 2009-0009-DWQ was adopted by the State Water Resources
Control Board on: September 2, 2009
Order No. 2009-0009-DWQ became effective on: July 1, 2010
Order No. 2010-0014-DWQ became effective on: February 14, 2011
Order No. 2009-0009-DWQ as amended by 2010-0014-DWQ shall
expire on: September 2, 2014
This Order, which amends Order No. 2009-0009-DWQ as amended by
2010-0014-DWQ, was adopted by the State Water Resources Control
Board on:
July 17, 2012
This Order No. 2012-0006-DWQ shall become effective on: July 17, 2012
2009-0009-DWQ amended by 2010-0014-DWQ & 2012-0006-DWQ
i
TABLE OF CONTENTS
I. FINDINGS ...................................................................................................................................... 1
II. CONDITIONS FOR PERMIT COVERAGE ............................................................................ 14
III. DISCHARGE PROHIBITIONS ................................................................................................. 20
IV. SPECIAL PROVISIONS ............................................................................................................. 22
V. EFFLUENT STANDARDS & RECEIVING WATER MONITORING ................................. 28
VI. RECEIVING WATER LIMITATIONS .................................................................................... 31
VII. TRAINING QUALIFICATIONS AND CERTIFICATION REQUIREMENTS ................... 32
VIII. RISK DETERMINATION .......................................................................................................... 33
IX. RISK LEVEL 1 REQUIREMENTS ........................................................................................... 34
X. RISK LEVEL 2 REQUIREMENTS ........................................................................................... 34
XI. RISK LEVEL 3 REQUIREMENTS ........................................................................................... 34
XII. ACTIVE TREATMENT SYSTEMS (ATS) ............................................................................... 34
XIII. POST-CONSTRUCTION STANDARDS .................................................................................. 35
XIV. SWPPP REQUIREMENTS ........................................................................................................ 37
XV. REGIONAL WATER BOARD AUTHORITIES ...................................................................... 38
XVI. ANNUAL REPORTING REQUIREMENTS ............................................................................ 39
LIST OF ATTACHMENTS
Attachment A – Linear Underground/Overhead Requirements
Attachment A.1 – LUP Type Determination
Attachment A.2 – LUP Permit Registration Documents
Attachment B – Permit Registration Documents
Attachment C – Risk Level 1 Requirements
Attachment D – Risk Level 2 Requirements
Attachment E – Risk Level 3 Requirements
Attachment F – Active Treatment System (ATS) Requirements
LIST OF APPENDICES
Appendix 1 – Risk Determination Worksheet
Appendix 2 – Post-Construction Water Balance Performance Standard
Appendix 2.1 – Post-Construction Water Balance Performance Standard Spreadsheet
Appendix 3 – Bioassessment Monitoring Guidelines
Appendix 4 – Adopted/Implemented Sediment TMDLs
Appendix 5 – Glossary
Appendix 6 – Acronyms
Appendix 7 – State and Regional Water Resources Control Board Contacts
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STATE WATER RESOURCES CONTROL BOARD
ORDER NO. 2009-0009-DWQ
[AS AMENDED BY ORDER NO. 2010-0014-DWQ]
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
GENERAL PERMIT NO. CAS000002
WASTE DISCHARGE REQUIREMENTS
FOR
DISCHARGES OF STORM WATER RUNOFF ASSOCIATED WITH
CONSTRUCTION AND LAND DISTURBANCE ACTIVITIES
I. FINDINGS
A. General Findings
The State Water Resources Control Board (State Water Board) finds that:
1. The federal Clean Water Act (CWA) prohibits certain discharges of
storm water containing pollutants except in compliance with a National
Pollutant Discharge Elimination System (NPDES) permit (Title 33
United States Code (U.S.C.) §§ 1311 and 1342(p); also referred to as
Clean Water Act (CWA) §§ 301 and 402(p)). The U.S. Environmental
Protection Agency (U.S. EPA) promulgates federal regulations to
implement the CWA’s mandate to control pollutants in storm water
runoff discharges. (Title 40 Code of Federal Regulations (C.F.R.)
Parts 122, 123, and 124). The federal statutes and regulations require
discharges to surface waters comprised of storm water associated with
construction activity, including demolition, clearing, grading, and
excavation, and other land disturbance activities (except operations
that result in disturbance of less than one acre of total land area and
which are not part of a larger common plan of development or sale), to
obtain coverage under an NPDES permit. The NPDES permit must
require implementation of Best Available Technology Economically
Achievable (BAT) and Best Conventional Pollutant Control Technology
(BCT) to reduce or eliminate pollutants in storm water runoff. The
NPDES permit must also include additional requirements necessary to
implement applicable water quality standards.
2. This General Permit authorizes discharges of storm water associated
with construction activity so long as the dischargers comply with all
requirements, provisions, limitations and prohibitions in the permit. In
addition, this General Permit regulates the discharges of storm water
associated with construction activities from all Linear
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Underground/Overhead Projects resulting in the disturbance of greater
than or equal to one acre (Attachment A).
3. This General Permit regulates discharges of pollutants in storm water
associated with construction activity (storm water discharges) to waters
of the United States from construction sites that disturb one or more
acres of land surface, or that are part of a common plan of
development or sale that disturbs more than one acre of land surface.
4. This General Permit does not preempt or supersede the authority of
local storm water management agencies to prohibit, restrict, or control
storm water discharges to municipal separate storm sewer systems or
other watercourses within their jurisdictions.
5. This action to adopt a general NPDES permit is exempt from the
provisions of Chapter 3 of the California Environmental Quality Act
(CEQA) (Public Resources Code Section 21100, et seq.), pursuant to
Section 13389 of the California Water Code.
6. Pursuant to 40 C.F.R. § 131.12 and State Water Board Resolution No.
68-16,1 which incorporates the requirements of § 131.12 where
applicable, the State Water Board finds that discharges in compliance
with this General Permit will not result in the lowering of water quality
standards, and are therefore consistent with those provisions.
Compliance with this General Permit will result in improvements in
water quality.
7. This General Permit serves as an NPDES permit in compliance with
CWA § 402 and will take effect on July 1, 2010 by the State Water
Board provided the Regional Administrator of the U.S. EPA has no
objection. If the U.S. EPA Regional Administrator objects to its
issuance, the General Permit will not become effective until such
objection is withdrawn.
8. Following adoption and upon the effective date of this General Permit,
the Regional Water Quality Control Boards (Regional Water Boards)
shall enforce the provisions herein.
9. Regional Water Boards establish water quality standards in Basin
Plans. The State Water Board establishes water quality standards in
various statewide plans, including the California Ocean Plan. U.S.
EPA establishes water quality standards in the National Toxic Rule
(NTR) and the California Toxic Rule (CTR).
1 Resolution No. 68-16 generally requires that existing water quality be maintained unless degradation is
justified based on specific findings.
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10. This General Permit does not authorize discharges of fill or dredged
material regulated by the U.S. Army Corps of Engineers under CWA §
404 and does not constitute a waiver of water quality certification under
CWA § 401.
11. The primary storm water pollutant at construction sites is excess
sediment. Excess sediment can cloud the water, which reduces the
amount of sunlight reaching aquatic plants, clog fish gills, smother
aquatic habitat and spawning areas, and impede navigation in our
waterways. Sediment also transports other pollutants such as
nutrients, metals, and oils and greases.
12. Construction activities can impact a construction site’s runoff sediment
supply and transport characteristics. These modifications, which can
occur both during and after the construction phase, are a significant
cause of degradation of the beneficial uses established for water
bodies in California. Dischargers can avoid these effects through
better construction site design and activity practices.
13. This General Permit recognizes four distinct phases of construction
activities. The phases are Grading and Land Development Phase,
Streets and Utilities Phase, Vertical Construction Phase, and Final
Landscaping and Site Stabilization Phase. Each phase has activities
that can result in different water quality effects from different water
quality pollutants. This General Permit also recognizes inactive
construction as a category of construction site type.
14. Compliance with any specific limits or requirements contained in this
General Permit does not constitute compliance with any other
applicable requirements.
15. Following public notice in accordance with State and Federal laws and
regulations, the State Water Board heard and considered all comments
and testimony in a public hearing on 06/03/2009. The State Water
Board has prepared written responses to all significant comments.
16. Construction activities obtaining coverage under the General Permit
may have multiple discharges subject to requirements that are specific
to general, linear, and/or active treatment system discharge types.
17. The State Water Board may reopen the permit if the U.S. EPA adopts
a final effluent limitation guideline for construction activities.
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B. Activities Covered Under the General Permit
18. Any construction or demolition activity, including, but not limited to,
clearing, grading, grubbing, or excavation, or any other activity that
results in a land disturbance of equal to or greater than one acre.
19. Construction activity that results in land surface disturbances of less
than one acre if the construction activity is part of a larger common
plan of development or the sale of one or more acres of disturbed land
surface.
20. Construction activity related to residential, commercial, or industrial
development on lands currently used for agriculture including, but not
limited to, the construction of buildings related to agriculture that are
considered industrial pursuant to U.S. EPA regulations, such as dairy
barns or food processing facilities.
21. Construction activity associated with Linear Underground/Overhead
Utility Projects (LUPs) including, but not limited to, those activities
necessary for the installation of underground and overhead linear
facilities (e.g., conduits, substructures, pipelines, towers, poles, cables,
wires, connectors, switching, regulating and transforming equipment
and associated ancillary facilities) and include, but are not limited to,
underground utility mark-out, potholing, concrete and asphalt cutting
and removal, trenching, excavation, boring and drilling, access road
and pole/tower pad and cable/wire pull station, substation construction,
substructure installation, construction of tower footings and/or
foundations, pole and tower installations, pipeline installations,
welding, concrete and/or pavement repair or replacement, and
stockpile/borrow locations.
22. Discharges of sediment from construction activities associated with oil
and gas exploration, production, processing, or treatment operations or
transmission facilities.2
23. Storm water discharges from dredge spoil placement that occur
outside of U.S. Army Corps of Engineers jurisdiction (upland sites) and
that disturb one or more acres of land surface from construction activity
are covered by this General Permit. Construction sites that intend to
disturb one or more acres of land within the jurisdictional boundaries of
2 Pursuant to the Ninth Circuit Court of Appeals’ decision in NRDC v. EPA (9th Cir. 2008) 526 F.3d 591, and
subsequent denial of the U.S. EPA’s petition for reconsideration in November 2008, oil and gas construction
activities discharging storm water contaminated only with sediment are no longer exempt from the NPDES
program.
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a CWA § 404 permit should contact the appropriate Regional Water
Board to determine whether this permit applies to the site.
C. Activities Not Covered Under the General Permit
24. Routine maintenance to maintain original line and grade, hydraulic
capacity, or original purpose of the facility.
25. Disturbances to land surfaces solely related to agricultural operations
such as disking, harrowing, terracing and leveling, and soil preparation.
26. Discharges of storm water from areas on tribal lands; construction on
tribal lands is regulated by a federal permit.
27. Construction activity and land disturbance involving discharges of
storm water within the Lake Tahoe Hydrologic Unit. The Lahontan
Regional Water Board has adopted its own permit to regulate storm
water discharges from construction activity in the Lake Tahoe
Hydrologic Unit (Regional Water Board 6SLT). Owners of construction
sites in this watershed must apply for the Lahontan Regional Water
Board permit rather than the statewide Construction General Permit.
28. Construction activity that disturbs less than one acre of land surface,
and that is not part of a larger common plan of development or the sale
of one or more acres of disturbed land surface.
29. Construction activity covered by an individual NPDES Permit for storm
water discharges.
30. Discharges from small (1 to 5 acre) construction activities with an
approved Rainfall Erosivity Waiver authorized by U.S. EPA Phase II
regulations certifying to the State Board that small construction activity
will occur only when the Rainfall Erosivity Factor is less than 5 (“R” in
the Revised Universal Soil Loss Equation).
31. Landfill construction activity that is subject to the Industrial General
Permit.
32. Construction activity that discharges to Combined Sewer Systems.
33. Conveyances that discharge storm water runoff combined with
municipal sewage.
34. Discharges of storm water identified in CWA § 402(l)(2), 33 U.S.C. §
1342(l)(2).
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35. Discharges occurring in basins that are not tributary or hydrologically
connected to waters of the United States (for more information contact
your Regional Water Board).
D. Obtaining and Modifying General Permit Coverage
36. This General Permit requires all dischargers to electronically file all
Permit Registration Documents (PRDs), Notices of Termination (NOT),
changes of information, annual reporting, and other compliance
documents required by this General Permit through the State Water
Board’s Storm water Multi-Application and Report Tracking System
(SMARTS) website.
37. Any information provided to the Regional Water Board shall comply
with the Homeland Security Act and any other federal law that
concerns security in the United States; any information that does not
comply should not be submitted.
38. This General Permit grants an exception from the Risk Determination
requirements for existing sites covered under Water Quality Orders No.
99-08-DWQ, and No. 2003-0007-DWQ. For certain sites, adding
additional requirements may not be cost effective. Construction sites
covered under Water Quality Order No. 99-08-DWQ shall obtain permit
coverage at the Risk Level 1. LUPs covered under Water Quality
Order No. 2003-0007-DWQ shall obtain permit coverage as a Type 1
LUP. The Regional Water Boards have the authority to require Risk
Determination to be performed on sites currently covered under Water
Quality Orders No. 99-08-DWQ and No. 2003-0007-DWQ where they
deem it necessary. The State Water Board finds that there are two
circumstances when it may be appropriate for the Regional Water
Boards to require a discharger that had filed an NOI under State Water
Board Order No. 99-08-DWQ to recalculate the site’s risk level. These
circumstances are: (1) when the discharger has a demonstrated
history of noncompliance with State Water Board Order No. 99-08-
DWQ or; (2) when the discharger’s site poses a significant risk of
causing or contributing to an exceedance of a water quality standard
without the implementation of the additional Risk Level 2 or 3
requirements.
E. Prohibitions
39. All discharges are prohibited except for the storm water and non-storm
water discharges specifically authorized by this General Permit or
another NPDES permit. Non-storm water discharges include a wide
variety of sources, including improper dumping, spills, or leakage from
storage tanks or transfer areas. Non-storm water discharges may
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contribute significant pollutant loads to receiving waters. Measures to
control spills, leakage, and dumping, and to prevent illicit connections
during construction must be addressed through structural as well as
non-structural Best Management Practices (BMPs)3. The State Water
Board recognizes, however, that certain non-storm water discharges
may be necessary for the completion of construction.
40. This General Permit prohibits all discharges which contain a
hazardous substance in excess of reportable quantities established in
40 C.F.R. §§ 117.3 and 302.4, unless a separate NPDES Permit has
been issued to regulate those discharges.
41. This General Permit incorporates discharge prohibitions contained in
water quality control plans, as implemented by the State Water Board
and the nine Regional Water Boards.
42. Pursuant to the Ocean Plan, discharges to Areas of Special Biological
Significance (ASBS) are prohibited unless covered by an exception
that the State Water Board has approved.
43. This General Permit prohibits the discharge of any debris4 from
construction sites. Plastic and other trash materials can cause
negative impacts to receiving water beneficial uses. The State Water
Board encourages the use of more environmentally safe,
biodegradable materials on construction sites to minimize the potential
risk to water quality.
F. Training
44. In order to improve compliance with and to maintain consistent
enforcement of this General Permit, all dischargers are required to
appoint two positions - the Qualified SWPPP Developer (QSD) and the
Qualified SWPPP Practitioner (QSP) - who must obtain appropriate
training. Together with the key stakeholders, the State and Regional
Water Boards are leading the development of this curriculum through a
collaborative organization called The Construction General Permit
(CGP) Training Team.
45. The Professional Engineers Act (Bus. & Prof. Code section 6700, et
seq.) requires that all engineering work must be performed by a
California licensed engineer.
3 BMPs are scheduling of activities, prohibitions of practices, maintenance procedures, and other
management practices to prevent or reduce the discharge of pollutants to waters of the United States. BMPs
also include treatment requirements, operating procedures, and practice to control site runoff, spillage or
leaks, sludge or waste disposal, or drainage from raw material storage.
4 Litter, rubble, discarded refuse, and remains of destroyed inorganic anthropogenic waste.
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G. Determining and Reducing Risk
46. The risk of accelerated erosion and sedimentation from wind and water
depends on a number of factors, including proximity to receiving water
bodies, climate, topography, and soil type.
47. This General Permit requires dischargers to assess the risk level of a
site based on both sediment transport and receiving water risk. This
General Permit contains requirements for Risk Levels 1, 2 and 3, and
LUP Risk Type 1, 2, and 3 (Attachment A). Risk levels are established
by determining two factors: first, calculating the site's sediment risk;
and second, receiving water risk during periods of soil exposure (i.e.
grading and site stabilization). Both factors are used to determine the
site-specific Risk Level(s). LUPs can be determined to be Type 1
based on the flowchart in Attachment A.1.
48. Although this General Permit does not mandate specific setback
distances, dischargers are encouraged to set back their construction
activities from streams and wetlands whenever feasible to reduce the
risk of impacting water quality (e.g., natural stream stability and habitat
function). Because there is a reduced risk to receiving waters when
setbacks are used, this General Permit gives credit to setbacks in the
risk determination and post-construction storm water performance
standards. The risk calculation and runoff reduction mechanisms in
this General Permit are expected to facilitate compliance with any
Regional Water Board and local agency setback requirements, and to
encourage voluntary setbacks wherever practicable.
49. Rain events can occur at any time of the year in California. Therefore,
a Rain Event Action Plan (REAP) is necessary for Risk Level 2 and 3
traditional construction projects (LUPs exempt) to ensure that active
construction sites have adequate erosion and sediment controls
implemented prior to the onset of a storm event, even if construction is
planned only during the dry season.
50. Soil particles smaller than 0.02 millimeters (mm) (i.e., finer than
medium silt) do not settle easily using conventional measures for
sediment control (i.e., sediment basins). Given their long settling time,
dislodging these soils results in a significant risk that fine particles will
be released into surface waters and cause unacceptable downstream
impacts. If operated correctly, an Active Treatment System (ATS5) can
prevent or reduce the release of fine particles from construction sites.
5 An ATS is a treatment system that employs chemical coagulation, chemical flocculation, or electro
coagulation in order to reduce turbidity caused by fine suspended sediment.
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Use of an ATS can effectively reduce a site's risk of impacting
receiving waters.
51. Dischargers located in a watershed area where a Total Maximum Daily
Load (TMDL) has been adopted or approved by the Regional Water
Board or U.S. EPA may be required by a separate Regional Water
Board action to implement additional BMPs, conduct additional
monitoring activities, and/or comply with an applicable waste load
allocation and implementation schedule. Such dischargers may also
be required to obtain an individual Regional Water Board permit
specific to the area.
H. Effluent Standards
52. The State Water Board convened a blue ribbon panel of storm water
experts that submitted a report entitled, “The Feasibility of Numeric
Effluent Limits Applicable to Discharges of Storm Water Associated
with Municipal, Industrial and Construction Activities,” dated
June 19, 2006. The panel concluded that numeric limits or action
levels are technically feasible to control construction storm water
discharges, provided that certain conditions are considered. The panel
also concluded that numeric effluent limitations (NELs) are feasible for
discharges from construction sites that utilize an ATS. The State
Water Board has incorporated the expert panel’s suggestions into this
General Permit, which includes numeric action levels (NALs) for pH
and turbidity, and special numeric limits for ATS discharges.
Determining Compliance with Numeric Limitations
53. This General Permit sets a pH NAL of 6.5 to 8.5, and a turbidity NAL of
250 NTU. The purpose of the NAL and its associated monitoring
requirement is to provide operational information regarding the
performance of the measures used at the site to minimize the
discharge of pollutants and to protect beneficial uses and receiving
waters from the adverse effects of construction-related storm water
discharges. An exceedance of a NAL does not constitute a violation of
this General Permit.
54. This General Permit requires dischargers with NAL exceedances to
immediately implement additional BMPs and revise their Storm Water
Pollution Prevention Plans (SWPPPs) accordingly to either prevent
pollutants and authorized non-storm water discharges from
contaminating storm water, or to substantially reduce the pollutants to
levels consistently below the NALs. NAL exceedances are reported in
the State Water Boards SMARTS system, and the discharger is
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required to provide an NAL Exceedance Report when requested by a
Regional Water Board.
I. Receiving Water Limitations
55. This General Permit requires all enrolled dischargers to determine the
receiving waters potentially affected by their discharges and to comply
with all applicable water quality standards, including any more stringent
standards applicable to a water body.
J. Sampling, Monitoring, Reporting and Record Keeping
56. Visual monitoring of storm water and non-storm water discharges is
required for all sites subject to this General Permit.
57. Records of all visual monitoring inspections are required to remain on-
site during the construction period and for a minimum of three years.
58. For all Risk Level 3/LUP Type 3 and Risk Level 2/LUP Type 2 sites,
this General Permit requires effluent monitoring for pH and turbidity.
Sampling, analysis and monitoring requirements for effluent monitoring
for pH and turbidity are contained in this General Permit.
59. Risk Level 3 and LUP Type 3 sites with effluent that exceeds the
Receiving Water Monitoring Triggers contained in this General Permit
and with direct discharges to receiving water are required to conduct
receiving water monitoring. An exceedance of a Receiving Water
Monitoring Trigger does not constitute a violation of this General
Permit.
60. This General Permit establishes a 5 year, 24 hour (expressed in inches
of rainfall) as an exemptions to the receiving water monitoring
requirements for Risk Level 3 and LUP Type 3 dischargers.
61. If run-on is caused by a forest fire or any other natural disaster, then
receiving water monitoring triggers do not apply.
62. For Risk Level 3 and LUP Type 3 sites larger than 30 acres and with
direct discharges to receiving waters, this General Permit requires
bioassessment sampling before and after site completion to determine
if significant degradation to the receiving water’s biota has occurred.
Bioassessment sampling guidelines are contained in this General
Permit.
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63. A summary and evaluation of the sampling and analysis results will be
submitted in the Annual Reports.
64. This General Permit contains sampling, analysis and monitoring
requirements for non-visible pollutants at all sites subject to this
General Permit.
65. Compliance with the General Permit relies upon dischargers to
electronically self-report any discharge violations and to comply with
any Regional Water Board enforcement actions.
66. This General Permit requires that all dischargers maintain a paper or
electronic copy of all required records for three years from the date
generated or date submitted, whichever is last. These records must be
available at the construction site until construction is completed. For
LUPs, these documents may be retained in a crew member’s vehicle
and made available upon request.
K. Active Treatment System (ATS) Requirements
67. Active treatment systems add chemicals to facilitate flocculation,
coagulation and filtration of suspended sediment particles. The
uncontrolled release of these chemicals to the environment can
negatively affect the beneficial uses of receiving waters and/or degrade
water quality (e.g., acute and chronic toxicity). Additionally, the batch
storage and treatment of storm water through an ATS' can potentially
cause physical impacts on receiving waters if storage volume is
inadequate or due to sudden releases of the ATS batches and
improperly designed outfalls.
68. If designed, operated and maintained properly an ATS can achieve
very high removal rates of suspended sediment (measured as
turbidity), albeit at sometimes significantly higher costs than traditional
erosion/sediment control practices. As a result, this General Permit
establishes NELs consistent with the expected level of typical ATS
performance.
69. This General Permit requires discharges of storm water associated
with construction activity that undergo active treatment to comply with
special operational and effluent limitations to ensure that these
discharges do not adversely affect the beneficial uses of the receiving
waters or cause degradation of their water quality.
70. For ATS discharges, this General Permit establishes technology-based
NELs for turbidity.
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71. This General Permit establishes a 10 year, 24 hour (expressed in
inches of rainfall) Compliance Storm Event exemption from the
technology-based numeric effluent limitations for ATS discharges.
Exceedances of the ATS turbidity NEL constitutes a violation of this
General Permit.
L. Post-Construction Requirements
72. This General Permit includes performance standards for post-
construction that are consistent with State Water Board Resolution No.
2005-0006, "Resolution Adopting the Concept of Sustainability as a
Core Value for State Water Board Programs and Directing Its
Incorporation," and 2008-0030, “Requiring Sustainable Water
Resources Management.“ The requirement for all construction sites to
match pre-project hydrology will help ensure that the physical and
biological integrity of aquatic ecosystems are sustained. This “runoff
reduction” approach is analogous in principle to Low Impact
Development (LID) and will serve to protect related watersheds and
waterbodies from both hydrologic-based and pollution impacts
associated with the post-construction landscape.
73. LUP projects are not subject to post-construction requirements due to
the nature of their construction to return project sites to pre-
construction conditions.
M. Storm Water Pollution Prevention Plan Requirements
74. This General Permit requires the development of a site-specific
SWPPP. The SWPPP must include the information needed to
demonstrate compliance with all requirements of this General Permit,
and must be kept on the construction site and be available for review.
The discharger shall ensure that a QSD develops the SWPPP.
75. To ensure proper site oversight, this General Permit requires a
Qualified SWPPP Practitioner to oversee implementation of the BMPs
required to comply with this General Permit.
N. Regional Water Board Authorities
76. Regional Water Boards are responsible for implementation and
enforcement of this General Permit. A general approach to permitting
is not always suitable for every construction site and environmental
circumstances. Therefore, this General Permit recognizes that
Regional Water Boards must have some flexibility and authority to
alter, approve, exempt, or rescind permit authority granted under this
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General Permit in order to protect the beneficial uses of our receiving
waters and prevent degradation of water quality.
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IT IS HEREBY ORDERED that all dischargers subject to this General Permit
shall comply with the following conditions and requirements (including all
conditions and requirements as set forth in Attachments A, B, C, D, E and F)6:
II. CONDITIONS FOR PERMIT COVERAGE
A. Linear Underground/Overhead Projects (LUPs)
1. Linear Underground/Overhead Projects (LUPs) include, but are not
limited to, any conveyance, pipe, or pipeline for the transportation of
any gaseous, liquid (including water and wastewater for domestic
municipal services), liquescent, or slurry substance; any cable line or
wire for the transmission of electrical energy; any cable line or wire for
communications (e.g. telephone, telegraph, radio or television
messages); and associated ancillary facilities. Construction activities
associated with LUPs include, but are not limited to, (a) those activities
necessary for the installation of underground and overhead linear
facilities (e.g., conduits, substructures, pipelines, towers, poles, cables,
wires, connectors, switching, regulating and transforming equipment,
and associated ancillary facilities); and include, but are not limited to,
(b) underground utility mark-out, potholing, concrete and asphalt
cutting and removal, trenching, excavation, boring and drilling, access
road and pole/tower pad and cable/wire pull station, substation
construction, substructure installation, construction of tower footings
and/or foundations, pole and tower installations, pipeline installations,
welding, concrete and/ or pavement repair or replacement, and
stockpile/borrow locations.
2. The Legally Responsible Person is responsible for obtaining coverage
under the General Permit where the construction of pipelines, utility
lines, fiber-optic cables, or other linear underground/overhead projects
will occur across several properties unless the LUP construction
activities are covered under another construction storm water permit.
3. Only LUPs shall comply with the conditions and requirements in
Attachment A, A.1 & A.2 of this Order. The balance of this Order is not
applicable to LUPs except as indicated in Attachment A.
6 These attachments are part of the General Permit itself and are not separate documents that are capable
of being updated independently by the State Water Board.
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B. Obtaining Permit Coverage Traditional Construction Sites
1. The Legally Responsible Person (LRP) (see Special Provisions,
Electronic Signature and Certification Requirements, Section IV.I.1)
must obtain coverage under this General Permit.
2. To obtain coverage, the LRP must electronically file Permit
Registration Documents (PRDs) prior to the commencement of
construction activity. Failure to obtain coverage under this General
Permit for storm water discharges to waters of the United States is a
violation of the CWA and the California Water Code.
3. PRDs shall consist of:
a. Notice of Intent (NOI)
b. Risk Assessment (Section VIII)
c. Site Map
d. Storm Water Pollution Prevention Plan (Section XIV)
e. Annual Fee
f. Signed Certification Statement
Any information provided to the Regional Water Board shall comply
with the Homeland Security Act and any other federal law that
concerns security in the United States; any information that does not
comply should not be submitted.
Attachment B contains additional PRD information. Dischargers must
electronically file the PRDs, and mail the appropriate annual fee to the
State Water Board.
4. This permit is effective on July 1, 2010.
a. Dischargers Obtaining Coverage On or After July 1, 2010: All
dischargers requiring coverage on or after July 1, 2010, shall
electronically file their PRDs prior to the commencement of
construction activities, and mail the appropriate annual fee no later
than seven days prior to the commencement of construction
activities. Permit coverage shall not commence until the PRDs and
the annual fee are received by the State Water Board, and a WDID
number is assigned and sent by SMARTS.
b. Dischargers Covered Under 99-08-DWQ and 2003-0007-DWQ:
Existing dischargers subject to State Water Board Order No. 99-08-
DWQ (existing dischargers) will continue coverage under 99-08-
DWQ until July 1, 2010. After July 1, 2010, all NOIs subject to
State Water Board Order No. 99-08-DWQ will be terminated.
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Existing dischargers shall electronically file their PRDs no later than
July 1, 2010. If an existing discharger’s site acreage subject to the
annual fee has changed, it shall mail a revised annual fee no less
than seven days after receiving the revised annual fee notification,
or else lose permit coverage. All existing dischargers shall be
exempt from the risk determination requirements in Section VIII of
this General Permit until two years after permit adoption. All
existing dischargers are therefore subject to Risk Level 1
requirements regardless of their site’s sediment and receiving water
risks. However, a Regional Board retains the authority to require
an existing discharger to comply with the Section VIII risk
determination requirements.
5. The discharger is only considered covered by this General Permit upon
receipt of a Waste Discharger Identification (WDID) number assigned
and sent by the State Water Board Storm water Multi-Application and
Report Tracking System (SMARTS). In order to demonstrate
compliance with this General Permit, the discharger must obtain a
WDID number and must present documentation of a valid WDID upon
demand.
6. During the period this permit is subject to review by the U.S. EPA, the
prior permit (State Water Board Order No. 99-08-DWQ) remains in
effect. Existing dischargers under the prior permit will continue to have
coverage under State Water Board Order No. 99-08-DWQ until this
General Permit takes effect on July 1, 2010. Dischargers who
complete their projects and electronically file an NOT prior to July 1,
2010, are not required to obtain coverage under this General Permit.
7. Small Construction Rainfall Erosivity Waiver
EPA’s Small Construction Erosivity Waiver applies to sites between
one and five acres demonstrating that there are no adverse water
quality impacts.
Dischargers eligible for a Rainfall Erosivity Waiver based on low
erosivity potential shall complete the electronic Notice of Intent (NOI)
and Sediment Risk form through the State Water Board’s SMARTS
system, certifying that the construction activity will take place during a
period when the value of the rainfall erosivity factor is less than five.
Where the LRP changes or another LRP is added during construction,
the new LRP must also submit a waiver certification through the
SMARTS system.
If a small construction site continues beyond the projected completion
date given on the waiver certification, the LRP shall recalculate the
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rainfall erosivity factor for the new project duration and submit this
information through the SMARTS system. If the new R factor is below
five (5), the discharger shall update through SMARTS all applicable
information on the waiver certification and retain a copy of the revised
waiver onsite. The LRP shall submit the new waiver certification 30
days prior to the projected completion date listed on the original waiver
form to assure exemption from permitting requirements is
uninterrupted. If the new R factor is five (5) or above, the LRP shall be
required to apply for coverage under this Order.
8. In the case of a public emergency that requires immediate construction
activities, a discharger shall submit a brief description of the
emergency construction activity within five days of the onset of
construction, and then shall submit all PRDs within thirty days.
C. Revising Permit Coverage for Change of Acreage or New Ownership
1. The discharger may reduce or increase the total acreage covered
under this General Permit when a portion of the site is complete and/or
conditions for termination of coverage have been met (See Section II.D
Conditions for Termination of Coverage); when ownership of a portion
of the site is sold to a different entity; or when new acreage, subject to
this General Permit, is added to the site.
2. Within 30 days of a reduction or increase in total disturbed acreage,
the discharger shall electronically file revisions to the PRDs that
include:
a. A revised NOI indicating the new project size;
b. A revised site map showing the acreage of the site completed,
acreage currently under construction, acreage sold/transferred or
added, and acreage currently stabilized in accordance with the
Conditions for Termination of Coverage in Section II.D below.
c. SWPPP revisions, as appropriate; and
d. Certification that any new landowners have been notified of
applicable requirements to obtain General Permit coverage. The
certification shall include the name, address, telephone number,
and e-mail address of the new landowner.
e. If the project acreage has increased, dischargers shall mail
payment of revised annual fees within 14 days of receiving the
revised annual fee notification.
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3. The discharger shall continue coverage under the General Permit for
any parcel that has not achieved “Final Stabilization” as defined in
Section II.D.
4. When an LRP with active General Permit coverage transfers its LRP
status to another person or entity that qualifies as an LRP, the existing
LRP shall inform the new LRP of the General Permit’s requirements.
In order for the new LRP to continue the construction activity on its
parcel of property, the new LRP, or the new LRP’s approved signatory,
must submit PRDs in accordance with this General Permit’s
requirements.
D. Conditions for Termination of Coverage
1. Within 90 days of when construction is complete or ownership has
been transferred, the discharger shall electronically file a Notice of
Termination (NOT), a final site map, and photos through the State
Water Boards SMARTS system. Filing a NOT certifies that all General
Permit requirements have been met. The Regional Water Board will
consider a construction site complete only when all portions of the site
have been transferred to a new owner, or all of the following conditions
have been met:
a. For purposes of “final stabilization,” the site will not pose any
additional sediment discharge risk than it did prior to the
commencement of construction activity;
b. There is no potential for construction-related storm water pollutants
to be discharged into site runoff;
c. Final stabilization has been reached;
d. Construction materials and wastes have been disposed of properly;
e. Compliance with the Post-Construction Standards in Section XIII of
this General Permit has been demonstrated;
f. Post-construction storm water management measures have been
installed and a long-term maintenance plan7 has been established;
and
g. All construction-related equipment, materials and any temporary
BMPs no longer needed are removed from the site.
7 For the purposes of this requirement a long-term maintenance plan will be designed for a minimum of five
years, and will describe the procedures to ensure that the post-construction storm water management
measures are adequately maintained.
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2. The discharger shall certify that final stabilization conditions are
satisfied in their NOT. Failure to certify shall result in continuation of
permit coverage and annual billing.
3. The NOT must demonstrate through photos, RUSLE or RUSLE2, or
results of testing and analysis that the site meets all of the conditions
above (Section II.D.1) and the final stabilization condition (Section
II.D.1.a) is attained by one of the following methods:
a. “70% final cover method,” no computational proof required
OR:
b. “RUSLE or RUSLE2 method,” computational proof required
OR:
c. “Custom method”, the discharger shall demonstrate in some other
manner than a or b, above, that the site complies with the “final
stabilization” requirement in Section II.D.1.a.
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III. DISCHARGE PROHIBITIONS
A. Dischargers shall not violate any discharge prohibitions contained in
applicable Basin Plans or statewide water quality control plans. Waste
discharges to Areas of Special Biological Significance (ASBS) are
prohibited by the California Ocean Plan, unless granted an exception
issued by the State Water Board.
B. All discharges are prohibited except for the storm water and non-storm
water discharges specifically authorized by this General Permit or another
NPDES permit.
C. Authorized non-storm water discharges may include those from de-
chlorinated potable water sources such as: fire hydrant flushing, irrigation
of vegetative erosion control measures, pipe flushing and testing, water to
control dust, uncontaminated ground water from dewatering, and other
discharges not subject to a separate general NPDES permit adopted by a
Regional Water Board. The discharge of non-storm water is authorized
under the following conditions:
1. The discharge does not cause or contribute to a violation of any water
quality standard;
2. The discharge does not violate any other provision of this General
Permit;
3. The discharge is not prohibited by the applicable Basin Plan;
4. The discharger has included and implemented specific BMPs required
by this General Permit to prevent or reduce the contact of the non-
storm water discharge with construction materials or equipment.
5. The discharge does not contain toxic constituents in toxic amounts or
(other) significant quantities of pollutants;
6. The discharge is monitored and meets the applicable NALs; and
7. The discharger reports the sampling information in the Annual Report.
If any of the above conditions are not satisfied, the discharge is not
authorized by this General Permit. The discharger shall notify the
Regional Water Board of any anticipated non-storm water discharges not
already authorized by this General Permit or another NPDES permit, to
determine whether a separate NPDES permit is necessary.
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D. Debris resulting from construction activities are prohibited from being
discharged from construction sites.
E. When soil contamination is found or suspected and a responsible party is
not identified, or the responsible party fails to promptly take the
appropriate action, the discharger shall have those soils sampled and
tested to ensure proper handling and public safety measures are
implemented. The discharger shall notify the appropriate local, State, and
federal agency(ies) when contaminated soil is found at a construction site,
and will notify the appropriate Regional Water Board.
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IV. SPECIAL PROVISIONS
A. Duty to Comply
1. The discharger shall comply with all of the conditions of this General
Permit. Any permit noncompliance constitutes a violation of the Clean
Water Act (CWA) and the Porter-Cologne Water Quality Control Act
and is grounds for enforcement action and/or removal from General
Permit coverage.
2. The discharger shall comply with effluent standards or prohibitions
established under Section 307(a) of the CWA for toxic pollutants within
the time provided in the regulations that establish these standards or
prohibitions, even if this General Permit has not yet been modified to
incorporate the requirement.
B. General Permit Actions
1. This General Permit may be modified, revoked and reissued, or
terminated for cause. The filing of a request by the discharger for a
General Permit modification, revocation and reissuance, or
termination, or a notification of planned changes or anticipated
noncompliance does not annul any General Permit condition.
2. If any toxic effluent standard or prohibition (including any schedule of
compliance specified in such effluent standard or prohibition) is
promulgated under Section 307(a) of the CWA for a toxic pollutant
which is present in the discharge and that standard or prohibition is
more stringent than any limitation on the pollutant in this General
Permit, this General Permit shall be modified or revoked and reissued
to conform to the toxic effluent standard or prohibition and the
dischargers so notified.
C. Need to Halt or Reduce Activity Not a Defense
It shall not be a defense for a discharger in an enforcement action that it
would have been necessary to halt or reduce the permitted activity in
order to maintain compliance with the conditions of this General Permit.
D. Duty to Mitigate
The discharger shall take all responsible steps to minimize or prevent any
discharge in violation of this General Permit, which has a reasonable
likelihood of adversely affecting human health or the environment.
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E. Proper Operation and Maintenance
The discharger shall at all times properly operate and maintain any
facilities and systems of treatment and control (and related
appurtenances) which are installed or used by the discharger to achieve
compliance with the conditions of this General Permit. Proper operation
and maintenance also includes adequate laboratory controls and
appropriate quality assurance procedures. Proper operation and
maintenance may require the operation of backup or auxiliary facilities or
similar systems installed by a discharger when necessary to achieve
compliance with the conditions of this General Permit.
F. Property Rights
This General Permit does not convey any property rights of any sort or
any exclusive privileges, nor does it authorize any injury to private
property or any invasion of personal rights, nor does it authorize any
infringement of Federal, State, or local laws or regulations.
G. Duty to Maintain Records and Provide Information
1. The discharger shall maintain a paper or electronic copy of all required
records, including a copy of this General Permit, for three years from
the date generated or date submitted, whichever is last. These
records shall be available at the construction site until construction is
completed.
2. The discharger shall furnish the Regional Water Board, State Water
Board, or U.S. EPA, within a reasonable time, any requested
information to determine compliance with this General Permit. The
discharger shall also furnish, upon request, copies of records that are
required to be kept by this General Permit.
H. Inspection and Entry
The discharger shall allow the Regional Water Board, State Water Board,
U.S. EPA, and/or, in the case of construction sites which discharge
through a municipal separate storm sewer, an authorized representative of
the municipal operator of the separate storm sewer system receiving the
discharge, upon the presentation of credentials and other documents as
may be required by law, to:
1. Enter upon the discharger’s premises at reasonable times where a
regulated construction activity is being conducted or where records
must be kept under the conditions of this General Permit;
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2. Access and copy at reasonable times any records that must be kept
under the conditions of this General Permit;
3. Inspect at reasonable times the complete construction site, including
any off-site staging areas or material storage areas, and the
erosion/sediment controls; and
4. Sample or monitor at reasonable times for the purpose of ensuring
General Permit compliance.
I. Electronic Signature and Certification Requirements
1. All Permit Registration Documents (PRDs) and Notices of Termination
(NOTs) shall be electronically signed, certified, and submitted via
SMARTS to the State Water Board. Either the Legally Responsible
Person (LRP), as defined in Appendix 5 – Glossary, or a person legally
authorized to sign and certify PRDs and NOTs on behalf of the LRP
(the LRP’s Approved Signatory, as defined in Appendix 5 - Glossary)
must submit all information electronically via SMARTS.
2. Changes to Authorization. If an Approved Signatory’s authorization is
no longer accurate, a new authorization satisfying the requirements of
paragraph (a) of this section must be submitted via SMARTS prior to or
together with any reports, information or applications to be signed by
an Approved Signatory.
3. All Annual Reports, or other information required by the General Permit
(other than PRDs and NOTs) or requested by the Regional Water
Board, State Water Board, U.S. EPA, or local storm water
management agency shall be certified and submitted by the LRP or the
LRP’s Approved Signatory.
J. Certification
Any person signing documents under Section IV.I above, shall make the
following certification:
"I certify under penalty of law that this document and all attachments were
prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate
the information submitted. Based on my inquiry of the person or persons
who manage the system or those persons directly responsible for
gathering the information, to the best of my knowledge and belief, the
information submitted is, true, accurate, and complete. I am aware that
there are significant penalties for submitting false information, including
the possibility of fine and imprisonment for knowing violations."
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K. Anticipated Noncompliance
The discharger shall give advance notice to the Regional Water Board and
local storm water management agency of any planned changes in the
construction activity, which may result in noncompliance with General
Permit requirements.
L. Bypass
Bypass8 is prohibited. The Regional Water Board may take enforcement
action against the discharger for bypass unless:
1. Bypass was unavoidable to prevent loss of life, personal injury or
severe property damage;9
2. There were no feasible alternatives to bypass, such as the use of
auxiliary treatment facilities, retention of untreated waste, or
maintenance during normal periods of equipment downtime. This
condition is not satisfied if adequate back-up equipment should have
been installed in the exercise of reasonable engineering judgment to
prevent a bypass that could occur during normal periods of equipment
downtime or preventative maintenance;
3. The discharger submitted a notice at least ten days in advance of the
need for a bypass to the Regional Water Board; or
4. The discharger may allow a bypass to occur that does not cause
effluent limitations to be exceeded, but only if it is for essential
maintenance to assure efficient operation. In such a case, the above
bypass conditions are not applicable. The discharger shall submit
notice of an unanticipated bypass as required.
M. Upset
1. A discharger that wishes to establish the affirmative defense of an
upset10 in an action brought for noncompliance shall demonstrate,
8 The intentional diversion of waste streams from any portion of a treatment facility 9 Severe property damage means substantial physical damage to property, damage to the treatment
facilities that causes them to become inoperable, or substantial and permanent loss of natural resources that
can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean
economic loss caused by delays in production.
10 An exceptional incident in which there is unintentional and temporary noncompliance the technology
based numeric effluent limitations because of factors beyond the reasonable control of the discharger. An
upset does not include noncompliance to the extent caused by operational error, improperly designed
treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper
operation.
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through properly signed, contemporaneous operating logs, or other
relevant evidence that:
a. An upset occurred and that the discharger can identify the cause(s)
of the upset
b. The treatment facility was being properly operated by the time of
the upset
c. The discharger submitted notice of the upset as required; and
d. The discharger complied with any remedial measures required
2. No determination made before an action of noncompliance occurs,
such as during administrative review of claims that noncompliance was
caused by an upset, is final administrative action subject to judicial
review.
3. In any enforcement proceeding, the discharger seeking to establish the
occurrence of an upset has the burden of proof
N. Penalties for Falsification of Reports
Section 309(c)(4) of the CWA provides that any person who knowingly
makes any false material statement, representation, or certification in any
record or other document submitted or required to be maintained under
this General Permit, including reports of compliance or noncompliance
shall upon conviction, be punished by a fine of not more than $10,000 or
by imprisonment for not more than two years or by both.
O. Oil and Hazardous Substance Liability
Nothing in this General Permit shall be construed to preclude the
institution of any legal action or relieve the discharger from any
responsibilities, liabilities, or penalties to which the discharger is or may be
subject to under Section 311 of the CWA.
P. Severability
The provisions of this General Permit are severable; and, if any provision
of this General Permit or the application of any provision of this General
Permit to any circumstance is held invalid, the application of such
provision to other circumstances and the remainder of this General Permit
shall not be affected thereby.
Q. Reopener Clause
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This General Permit may be modified, revoked and reissued, or
terminated for cause due to promulgation of amended regulations, receipt
of U.S. EPA guidance concerning regulated activities, judicial decision, or
in accordance with 40 Code of Federal Regulations (CFR) 122.62, 122.63,
122.64, and 124.5.
R. Penalties for Violations of Permit Conditions
1. Section 309 of the CWA provides significant penalties for any person
who violates a permit condition implementing Sections 301, 302, 306,
307, 308, 318, or 405 of the CWA or any permit condition or limitation
implementing any such section in a permit issued under Section 402.
Any person who violates any permit condition of this General Permit is
subject to a civil penalty not to exceed $37,50011 per calendar day of
such violation, as well as any other appropriate sanction provided by
Section 309 of the CWA.
2. The Porter-Cologne Water Quality Control Act also provides for civil
and criminal penalties, which in some cases are greater than those
under the CWA.
S. Transfers
This General Permit is not transferable.
T. Continuation of Expired Permit
This General Permit continues in force and effect until a new General
Permit is issued or the SWRCB rescinds this General Permit. Only those
dischargers authorized to discharge under the expiring General Permit are
covered by the continued General Permit.
11 May be further adjusted in accordance with the Federal Civil Penalties Inflation Adjustment Act.
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V. EFFLUENT STANDARDS & RECEIVING WATER MONITORING
A. Narrative Effluent Limitations
1. Storm water discharges and authorized non-storm water discharges
regulated by this General Permit shall not contain a hazardous
substance equal to or in excess of reportable quantities established in
40 C.F.R. §§ 117.3 and 302.4, unless a separate NPDES Permit has
been issued to regulate those discharges.
2. Dischargers shall minimize or prevent pollutants in storm water
discharges and authorized non-storm water discharges through the
use of controls, structures, and management practices that achieve
BAT for toxic and non-conventional pollutants and BCT for
conventional pollutants.
Table 1- Numeric Action Levels, Test Methods, Detection Limits, and Reporting
Units
Parameter Test
Method
Discharge
Type
Min.
Detection
Limit
Units Numeric
Action
Level
pH
Field test
with
calibrated
portable
instrument
Risk Level 2
0.2 pH
units
lower NAL =
6.5
upper NAL =
8.5
Risk Level 3
lower NAL =
6.5
upper NAL =
8.5
Turbidity EPA
0180.1
and/or field
test with
calibrated
portable
instrument
Risk Level 2
1 NTU
250 NTU
Risk Level 3 250 NTU
B. Numeric Action Levels (NALs)
1. For Risk Level 2 and 3 dischargers, the lower storm event average
NAL for pH is 6.5 pH units and the upper storm event average NAL for
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pH is 8.5 pH units. The discharger shall take actions as described
below if the discharge is outside of this range of pH values.
2. For Risk Level 2 and 3 dischargers, the NAL storm event daily average
for turbidity is 250 NTU. The discharger shall take actions as
described below if the discharge is outside of this range of turbidity
values.
3. Whenever the results from a storm event daily average indicate that
the discharge is below the lower NAL for pH, exceeds the upper NAL
for pH, or exceeds the turbidity NAL (as listed in Table 1), the
discharger shall conduct a construction site and run-on evaluation to
determine whether pollutant source(s) associated with the site’s
construction activity may have caused or contributed to the NAL
exceedance and shall immediately implement corrective actions if they
are needed.
4. The site evaluation shall be documented in the SWPPP and
specifically address whether the source(s) of the pollutants causing the
exceedance of the NAL:
a. Are related to the construction activities and whether additional
BMPs are required to (1) meet BAT/BCT requirements; (2) reduce
or prevent pollutants in storm water discharges from causing
exceedances of receiving water objectives; and (3) determine what
corrective action(s) were taken or will be taken and with a
description of the schedule for completion.
AND/OR:
b. Are related to the run-on associated with the construction site
location and whether additional BMPs measures are required to (1)
meet BAT/BCT requirements; (2) reduce or prevent pollutants in
storm water discharges from causing exceedances of receiving
water objectives; and (3) what corrective action(s) were taken or
will be taken with a description of the schedule for completion.
C. Receiving Water Monitoring Triggers
1. The receiving water monitoring triggers for Risk Level 3 dischargers
with direct discharges to surface waters are triggered when the daily
average effluent pH values during any site phase when there is a high
risk of pH discharge12 fall outside of the range of 6.0 and 9.0 pH units,
or when the daily average effluent turbidity exceeds 500 NTU.
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2. Risk Level 3 dischargers with with direct discharges to surface waters
shall conduct receiving water monitoring whenever their effluent
monitoring results exceed the receiving water monitoring triggers. If
the pH trigger is exceeded, the receiving water shall be monitored for
pH for the duration of coverage under this General Permit. If the
turbidity trigger is exceeded, the receiving water shall be monitored for
turbidity and SSC for the duration of coverage under this general
permit.
3. Risk Level 3 dischargers with direct discharges to surfaces waters
shall initiate receiving water monitoring when the triggers are exceeded
unless the storm event causing the exceedance is determined after the
fact to equal to or greater than the 5-year 24-hour storm (expressed in
inches of rainfall) as determined by using these maps:
http://www.wrcc.dri.edu/pcpnfreq/nca5y24.gif
http://www.wrcc.dri.edu/pcpnfreq/sca5y24.gif
Verification of the 5-year 24-hour storm event shall be done by
reporting on-site rain gauge readings as well as nearby governmental
rain gauge readings.
4. If run-on is caused by a forest fire or any other natural disaster, then
receiving water monitoring triggers do not apply.
12 A period of high risk of pH discharge is defined as a project's complete utilities phase, complete vertical
build phase, and any portion of any phase where significant amounts of materials are placed directly on the
land at the site in a manner that could result in significant alterations of the background pH of the
discharges.
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VI. RECEIVING WATER LIMITATIONS
A. The discharger shall ensure that storm water discharges and authorized
non-storm water discharges to any surface or ground water will not
adversely affect human health or the environment.
B. The discharger shall ensure that storm water discharges and authorized
non-storm water discharges will not contain pollutants in quantities that
threaten to cause pollution or a public nuisance.
C. The discharger shall ensure that storm water discharges and authorized
non-storm water discharges will not contain pollutants that cause or
contribute to an exceedance of any applicable water quality objectives or
water quality standards (collectively, WQS) contained in a Statewide
Water Quality Control Plan, the California Toxics Rule, the National Toxics
Rule, or the applicable Regional Water Board’s Water Quality Control Plan
(Basin Plan).
D. Dischargers located within the watershed of a CWA § 303(d) impaired
water body, for which a TMDL has been approved by the U.S. EPA, shall
comply with the approved TMDL if it identifies “construction activity” or
land disturbance as a source of the pollution.
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VII. TRAINING QUALIFICATIONS AND CERTIFICATION
REQUIREMENTS
A. General
The discharger shall ensure that all persons responsible for implementing
requirements of this General Permit shall be appropriately trained in
accordance with this Section. Training should be both formal and
informal, occur on an ongoing basis, and should include training offered by
recognized governmental agencies or professional organizations. Those
responsible for preparing and amending SWPPPs shall comply with the
requirements in this Section VII.
The discharger shall provide documentation of all training for persons
responsible for implementing the requirements of this General Permit in
the Annual Reports.
B. SWPPP Certification Requirements
1. Qualified SWPPP Developer: The discharger shall ensure that
SWPPPs are written, amended and certified by a Qualified SWPPP
Developer (QSD). A QSD shall have one of the following registrations
or certifications, and appropriate experience, as required for:
a. A California registered professional civil engineer;
b. A California registered professional geologist or engineering
geologist;
c. A California registered landscape architect;
d. A professional hydrologist registered through the American Institute
of Hydrology;
e. A Certified Professional in Erosion and Sediment Control (CPESC)
TM registered through Enviro Cert International, Inc.;
f. A Certified Professional in Storm Water Quality (CPSWQ) TM
registered through Enviro Cert International, Inc.; or
g. A professional in erosion and sediment control registered through
the National Institute for Certification in Engineering Technologies
(NICET).
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Effective two years after the adoption date of this General Permit, a
QSD shall have attended a State Water Board-sponsored or approved
QSD training course.
2. The discharger shall list the name and telephone number of the
currently designated Qualified SWPPP Developer(s) in the SWPPP.
3. Qualified SWPPP Practitioner: The discharger shall ensure that all
BMPs required by this General Permit are implemented by a Qualified
SWPPP Practitioner (QSP). A QSP is a person responsible for non-
storm water and storm water visual observations, sampling and
analysis. Effective two years from the date of adoption of this General
Permit, a QSP shall be either a QSD or have one of the following
certifications:
a. A certified erosion, sediment and storm water inspector registered
through Enviro Cert International, Inc.; or
b. A certified inspector of sediment and erosion control registered
through Certified Inspector of Sediment and Erosion Control, Inc.
Effective two years after the adoption date of this General Permit, a
QSP shall have attended a State Water Board-sponsored or approved
QSP training course.
4. The LRP shall list in the SWPPP, the name of any Approved Signatory,
and provide a copy of the written agreement or other mechanism that
provides this authority from the LRP in the SWPPP.
5. The discharger shall include, in the SWPPP, a list of names of all
contractors, subcontractors, and individuals who will be directed by the
Qualified SWPPP Practitioner. This list shall include telephone
numbers and work addresses. Specific areas of responsibility of each
subcontractor and emergency contact numbers shall also be included.
6. The discharger shall ensure that the SWPPP and each amendment will
be signed by the Qualified SWPPP Developer. The discharger shall
include a listing of the date of initial preparation and the date of each
amendment in the SWPPP.
VIII. RISK DETERMINATION
The discharger shall calculate the site's sediment risk and receiving water risk
during periods of soil exposure (i.e. grading and site stabilization) and use the
calculated risks to determine a Risk Level(s) using the methodology in
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Appendix 1. For any site that spans two or more planning watersheds,13 the
discharger shall calculate a separate Risk Level for each planning watershed.
The discharger shall notify the State Water Board of the site’s Risk Level
determination(s) and shall include this determination as a part of submitting
the PRDs. If a discharger ends up with more than one Risk Level
determination, the Regional Water Board may choose to break the project
into separate levels of implementation.
IX. RISK LEVEL 1 REQUIREMENTS
Risk Level 1 Dischargers shall comply with the requirements included in
Attachment C of this General Permit.
X. RISK LEVEL 2 REQUIREMENTS
Risk Level 2 Dischargers shall comply with the requirements included in
Attachment D of this General Permit.
XI. RISK LEVEL 3 REQUIREMENTS
Risk Level 3 Dischargers shall comply with the requirements included in
Attachment E of this General Permit.
XII. ACTIVE TREATMENT SYSTEMS (ATS)
Dischargers choosing to implement an ATS on their site shall comply with all of
the requirements in Attachment F of this General Permit.
13 Planning watershed: defined by the Calwater Watershed documents as a watershed that ranges in size
from approximately 3,000 to 10,000 acres http://cain.ice.ucdavis.edu/calwater/calwfaq.html,
http://gis.ca.gov/catalog/BrowseRecord.epl?id=22175 .
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XIII. POST-CONSTRUCTION STANDARDS
A. All dischargers shall comply with the following runoff reduction
requirements unless they are located within an area subject to post-
construction standards of an active Phase I or II municipal separate storm
sewer system (MS4) permit that has an approved Storm Water
Management Plan.
1. This provision shall take effect three years from the adoption date of
this permit, or later at the discretion of the Executive Officer of the
Regional Board.
2. The discharger shall demonstrate compliance with the requirements of
this section by submitting with their NOI a map and worksheets in
accordance with the instructions in Appendix 2. The discharger shall
use non-structural controls unless the discharger demonstrates that
non-structural controls are infeasible or that structural controls will
produce greater reduction in water quality impacts.
3. The discharger shall, through the use of non-structural and structural
measures as described in Appendix 2, replicate the pre-project water
balance (for this permit, defined as the volume of rainfall that ends up
as runoff) for the smallest storms up to the 85th percentile storm event
(or the smallest storm event that generates runoff, whichever is larger).
Dischargers shall inform Regional Water Board staff at least 30 days
prior to the use of any structural control measure used to comply with
this requirement. Volume that cannot be addressed using non-
structural practices shall be captured in structural practices and
approved by the Regional Water Board. When seeking Regional
Board approval for the use of structural practices, dischargers shall
document the infeasibility of using non-structural practices on the
project site, or document that there will be fewer water quality impacts
through the use of structural practices.
4. For sites whose disturbed area exceeds two acres, the discharger shall
preserve the pre-construction drainage density (miles of stream length
per square mile of drainage area) for all drainage areas within the area
serving a first order stream14 or larger stream and ensure that post-
project time of runoff concentration is equal or greater than pre-project
time of concentration.
14 A first order stream is defined as a stream with no tributaries.
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B. All dischargers shall implement BMPs to reduce pollutants in storm water
discharges that are reasonably foreseeable after all construction phases
have been completed at the site (Post-construction BMPs).
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XIV. SWPPP REQUIREMENTS
A. The discharger shall ensure that the Storm Water Pollution Prevention
Plans (SWPPPs) for all traditional project sites are developed and
amended or revised by a QSD. The SWPPP shall be designed to address
the following objectives:
1. All pollutants and their sources, including sources of sediment
associated with construction, construction site erosion and all other
activities associated with construction activity are controlled;
2. Where not otherwise required to be under a Regional Water Board
permit, all non-storm water discharges are identified and either
eliminated, controlled, or treated;
3. Site BMPs are effective and result in the reduction or elimination of
pollutants in storm water discharges and authorized non-storm water
discharges from construction activity to the BAT/BCT standard;
4. Calculations and design details as well as BMP controls for site run-on
are complete and correct, and
5. Stabilization BMPs installed to reduce or eliminate pollutants after
construction are completed.
B. To demonstrate compliance with requirements of this General Permit, the
QSD shall include information in the SWPPP that supports the
conclusions, selections, use, and maintenance of BMPs.
C. The discharger shall make the SWPPP available at the construction site
during working hours while construction is occurring and shall be made
available upon request by a State or Municipal inspector. When the
original SWPPP is retained by a crewmember in a construction vehicle
and is not currently at the construction site, current copies of the BMPs
and map/drawing will be left with the field crew and the original SWPPP
shall be made available via a request by radio/telephone.
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XV. REGIONAL WATER BOARD AUTHORITIES
A. In the case where the Regional Water Board does not agree with the
discharger’s self-reported risk level (e.g., they determine themselves to be
a Level 1 Risk when they are actually a Level 2 Risk site), Regional Water
Boards may either direct the discharger to reevaluate the Risk Level(s) for
their site or terminate coverage under this General Permit.
B. Regional Water Boards may terminate coverage under this General
Permit for dischargers who fail to comply with its requirements or where
they determine that an individual NPDES permit is appropriate.
C. Regional Water Boards may require dischargers to submit a Report of
Waste Discharge / NPDES permit application for Regional Water Board
consideration of individual requirements.
D. Regional Water Boards may require additional Monitoring and Reporting
Program Requirements, including sampling and analysis of discharges to
sediment-impaired water bodies.
E. Regional Water Boards may require dischargers to retain records for more
than the three years required by this General Permit.
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XVI. ANNUAL REPORTING REQUIREMENTS
A. All dischargers shall prepare and electronically submit an Annual Report
no later than September 1 of each year.
B. The discharger shall certify each Annual Report in accordance with the
Special Provisions.
C. The discharger shall retain an electronic or paper copy of each Annual
Report for a minimum of three years after the date the annual report is
filed.
D. The discharger shall include storm water monitoring information in the
Annual Report consisting of:
1. a summary and evaluation of all sampling and analysis results,
including copies of laboratory reports;
2. the analytical method(s), method reporting unit(s), and method
detection limit(s) of each analytical parameter (analytical results that
are less than the method detection limit shall be reported as "less than
the method detection limit");
3. a summary of all corrective actions taken during the compliance year;
4. identification of any compliance activities or corrective actions that
were not implemented;
5. a summary of all violations of the General Permit;
6. the names of individual(s) who performed the facility inspections,
sampling, visual observation (inspections), and/or measurements;
7. the date, place, time of facility inspections, sampling, visual
observation (inspections), and/or measurements, including
precipitation (rain gauge); and
8. the visual observation and sample collection exception records and
reports specified in Attachments C, D, and E.
E. The discharger shall provide training information in the Annual Report
consisting of:
1. documentation of all training for individuals responsible for all activities
associated with compliance with this General Permit;
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2. documentation of all training for individuals responsible for BMP
installation, inspection, maintenance, and repair; and
3. documentation of all training for individuals responsible for overseeing,
revising, and amending the SWPPP.
ATTACHMENT A
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ATTACHMENT A
Linear Underground/ Overhead Requirements
A. DEFINITION OF LINEAR UNDERGROUND/OVERHEAD PROJECTS .... 1
B. LINEAR PROJECT PERMIT REGISTRATION DOCUMENTS (PRDs) ..... 3
C. LINEAR PROJECT TERMINATION OF COVERAGE REQUIREMENTS .. 4
D. DISCHARGE PROHIBITIONS ................................................................... 6
E. SPECIAL PROVISIONS ............................................................................. 8
F. EFFLUENT STANDARDS & RECEIVING WATER MONITORING ......... 13
G. RECEIVING WATER LIMITATIONS ........................................................ 16
H. TRAINING QUALIFICATIONS ................................................................. 17
I. TYPES OF LINEAR PROJECTS ............................................................. 19
J. LUP TYPE-SPECIFIC REQUIREMENTS ................................................ 20
K. STORM WATER POLLUTION PREVENTION PLAN (SWPPP)
REQUIREMENTS .................................................................................... 28
L. REGIONAL WATER BOARD AUTHORITIES .......................................... 29
M. MONITORING AND REPORTING REQUIREMENTS ............................. 31
All Linear Underground/Overhead project dischargers who submit permit
registration documents (PRDs) indicating their intention to be regulated under the
provisions of this General Permit shall comply with the following:
A. DEFINITION OF LINEAR UNDERGROUND/OVERHEAD PROJECTS
1. Linear Underground/Overhead Projects (LUPs) include, but are not limited
to, any conveyance, pipe, or pipeline for the transportation of any
gaseous, liquid (including water and wastewater for domestic municipal
services), liquiescent, or slurry substance; any cable line or wire for the
transmission of electrical energy; any cable line or wire for
communications (e.g., telephone, telegraph, radio, or television
messages); and associated ancillary facilities. Construction activities
associated with LUPs include, but are not limited to, (a) those activities
necessary for the installation of underground and overhead linear facilities
(e.g., conduits, substructures, pipelines, towers, poles, cables, wires,
connectors, switching, regulating and transforming equipment, and
associated ancillary facilities); and include, but are not limited to, (b)
underground utility mark-out, potholing, concrete and asphalt cutting and
removal, trenching, excavation, boring and drilling, access road and
pole/tower pad and cable/wire pull station, substation construction,
substructure installation, construction of tower footings and/or foundations,
pole and tower installations, pipeline installations, welding, concrete and/
or pavement repair or replacement, and stockpile/borrow locations.
2. LUP evaluation shall consist of two tasks:
ATTACHMENT A
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2
a. Confirm that the project or project section(s) qualifies as an LUP. The
State Water Board website contains a project determination guidance
flowchart.
http://www.waterboards.ca.gov/water_issues/programs/stormwater/con
stpermits.shtml
b. Identify which Type(s) (1, 2 or 3 described in Section I below) are
applicable to the project or project sections based on project sediment
and receiving water risk. (See Attachment A.1)
3. A Legally Responsible Person (LRP) for a Linear Underground/Overhead
project is required to obtain CGP coverage under one or more permit
registration document (PRD) electronic submittals to the State Water
Board’s Storm Water Multi-Application and Report Tracking (SMARTs)
system. Attachment A.1 contains a flow chart to be used when
determining if a linear project qualifies for coverage and to determine LUP
Types. Since a LUP may be constructed within both developed and
undeveloped locations and portions of LUPs may be constructed by
different contractors, LUPs may be broken into logical permit sections.
Sections may be determined based on portions of a project conducted by
one contractor. Other situations may also occur, such as the time period
in which the sections of a project will be constructed (e.g. project phases),
for which separate permit coverage is possible. For projects that are
broken into separate sections, a description of how each section relates to
the overall project and the definition of the boundaries between sections
shall be clearly stated.
4. Where construction activities transverse or enter into different Regional
Water Board jurisdictions, LRPs shall obtain permit coverage for each
Regional Water Board area involved prior to the commencement of
construction activities.
5. Small Construction Rainfall Erosivity Waiver
EPA’s Small Construction Erosivity Waiver applies to sites between one
and five acres demonstrating that there are no adverse water quality
impacts.
Dischargers eligible for a Rainfall Erosivity Waiver based on low erosivity
potential shall complete the electronic Notice of Intent (NOI) and Sediment
Risk form through the State Water Board’s SMARTS system, certifying
that the construction activity will take place during a period when the value
of the rainfall erosivity factor is less than five. Where the LRP changes or
another LRP is added during construction, the new LRP must also submit
a waiver certification through the SMARTS system.
ATTACHMENT A
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If a small linear construction site continues beyond the projected
completion date given on the waiver certification, the LRP shall recalculate
the rainfall erosivity factor for the new project duration and submit this
information through the SMARTS system. If the new R factor is below five
(5), the discharger shall update through SMARTS all applicable
information on the waiver certification and retain a copy of the revised
waiver onsite. The LRP shall submit the new waiver certification 30 days
prior to the projected completion date listed on the original waiver form to
assure exemption from permitting requirements is uninterrupted. If the
new R factor is five (5) or above, the LRP shall be required to apply for
coverage under this Order.
B. LINEAR PROJECT PERMIT REGISTRATION DOCUMENTS (PRDs)
Any information provided to the Regional Water Board shall comply with the
Homeland Security Act and any other federal law that concerns security in the
United States; any information that does not comply should not be submitted.
PRDs shall consist of the following:
1. Notice of Intent (NOI)
Prior to construction activities, the LRP of a proposed linear
underground/overhead project shall utilize the processes and methods
provided in Attachment A.2, Permit Registration Documents (PRDs) –
General Instructions for Linear Underground/Overhead Projects to comply
with the Construction General Permit.
2. Site Maps
LRPs submitting PRDs shall include at least 3 maps. The first map will be
a zoomed1 1000-1500 ft vicinity map that shows the starting point of the
project. The second will be a zoomed map of 1000-1500 ft showing the
ending location of the project. The third will be a larger view vicinity map,
1000 ft to 2000 ft, displaying the entire project location depending on the
project size, and indicating the LUP type (1, 2 or 3) areas within the total
project footprint.
3. Drawings
LRPs submitting PRDs shall include a construction drawing(s) or other
appropriate drawing(s) or map(s) that shows the locations of storm drain
1 An image with a close-up/enhanced detailed view of site features that show minute details such as streets
and neighboring structures.
Or: An image with a close-up/enhanced detailed view of the site’s surrounding infrastructure.
Or: An image with a close up detailed view of the project and its surroundings.
ATTACHMENT A
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inlets and waterbodies2 that may receive discharges from the construction
activities and that shows the locations of BMPs to be installed for all those
BMPs that can be illustrated on the revisable drawing(s) or map(s). If
storm drain inlets, waterbodies, and/or BMPs cannot be adequately shown
on the drawing(s) or map(s) they should be described in detail within the
SWPPP.
4. Storm Water Pollution Prevention Plan (SWPPP)
LUP dischargers shall comply with the SWPPP Preparation,
Implementation, and Oversight requirements in Section K of this
Attachment.
5. Contact information
LUP dischargers shall include contact information for all contractors (or
subcontractors) responsible for each area of an LUP project. This should
include the names, telephone numbers, and addresses of contact
personnel. Specific areas of responsibility of each contact, and
emergency contact numbers should also be included.
6. In the case of a public emergency that requires immediate construction
activities, a discharger shall submit a brief description of the emergency
construction activity within five days of the onset of construction, and then
shall submit all PRDs within thirty days.
C. LINEAR PROJECT TERMINATION OF COVERAGE REQUIREMENTS
The LRP may terminate coverage of an LUP when construction activities are
completed by submitting an electronic notice of termination (NOT) through the
State Water Board’s SMARTS system. Termination requirements are different depending on the complexity of the LUP. An LUP is considered
complete when: (a) there is no potential for construction-related storm water
pollution; (b) all elements of the SWPPP have been completed; (c) construction materials and waste have been disposed of properly; (d) the
site is in compliance with all local storm water management requirements;
and (e) the LRP submits a notice of termination (NOT) and has received approval for termination from the appropriate Regional Water Board office.
1. LUP Stabilization Requirements
The LUP discharger shall ensure that all disturbed areas of the
construction site are stabilized prior to termination of coverage under this
General Permit. Final stabilization for the purposes of submitting an NOT
2 Includes basin(s) that the MS4 storm sewer systems may drain to for Hydromodification or Hydrological
Conditional of Concerns under the MS4 permits.
ATTACHMENT A
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5
is satisfied when all soil disturbing activities are completed and one of the
following criteria is met:
a. In disturbed areas that were vegetated prior to construction activities of
the LUP, the area disturbed must be re-established to a uniform
vegetative cover equivalent to 70 percent coverage of the
preconstruction vegetative conditions. Where preconstruction
vegetation covers less than 100 percent of the surface, such as in arid
areas, the 70 percent coverage criteria is adjusted as follows: if the
preconstruction vegetation covers 50 percent of the ground surface, 70
percent of 50 percent (.70 X .50=.35) would require 35 percent total
uniform surface coverage; or
b. Where no vegetation is present prior to construction, the site is
returned to its original line and grade and/or compacted to achieve
stabilization; or
c. Equivalent stabilization measures have been employed. These
measures include, but are not limited to, the use of such BMPs as
blankets, reinforced channel liners, soil cement, fiber matrices,
geotextiles, or other erosion resistant soil coverings or treatments.
2. LUP Termination of Coverage Requirements
The LRP shall file an NOT through the State Water Board’s SMARTS
system. By submitting an NOT, the LRP is certifying that construction activities for an LUP are complete and that the project is in full compliance
with requirements of this General Permit and that it is now compliant with
soil stabilization requirements where appropriate. Upon approval by the appropriate Regional Water Board office, permit coverage will be
terminated.
3. Revising Coverage for Change of Acreage
When the LRP of a portion of an LUP construction project changes, or when a phase within a multi-phase project is completed, the LRP may
reduce the total acreage covered by this General Permit. In reducing the
acreage covered by this General Permit, the LRP shall electronically file revisions to the PRDs that include:
ATTACHMENT A
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6
a. a revised NOI indicating the new project size;
b. a revised site map showing the acreage of the project completed,
acreage currently under construction, acreage sold, transferred or
added, and acreage currently stabilized.
c. SWPPP revisions, as appropriate; and
d. certification that any new LRPs have been notified of applicable
requirements to obtain General Permit coverage. The certification
shall include the name, address, telephone number, and e-mail
address (if known) of the new LRP.
If the project acreage has increased, dischargers shall mail payment of
revised annual fees within 14 days of receiving the revised annual fee
notification.
D. DISCHARGE PROHIBITIONS
1. LUP dischargers shall not violate any discharge prohibitions contained in
applicable Basin Plans or statewide water quality control plans. Waste
discharges to Areas of Special Biological Significance (ASBS) are
prohibited by the California Ocean Plan, unless granted an exception
issued by the State Water Board.
2. LUP dischargers are prohibited from discharging non-storm water that is
not otherwise authorized by this General Permit. Non-storm water
discharges authorized by this General Permit3 may include, fire hydrant
flushing, irrigation of vegetative erosion control measures, pipe flushing
and testing, water to control dust, street cleaning, dewatering,4
uncontaminated groundwater from dewatering, and other discharges not
subject to a separate general NPDES permit adopted by a Regional Water
Board. Such discharges are allowed by this General Permit provided they
are not relied upon to clean up failed or inadequate construction or post-
construction BMPs designed to keep materials on site. These authorized
non-storm water discharges:
3 Dischargers must identify all authorized non-storm water discharges in the LUP’s SWPPP and identify
BMPs that will be implemented to either eliminate or reduce pollutants in non-storm water discharges.
Regional Water Boards may direct the discharger to discontinue discharging such non-storm water
discharges if determined that such discharges discharge significant pollutants or threaten water quality. 4Dewatering activities may be prohibited or need coverage under a separate permit issued by the Regional
Water Boards. Dischargers shall check with the appropriate Regional Water Boards for any required permit
or basin plan conditions prior to initial dewatering activities to land, storm drains, or waterbodies.
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a. Shall not cause or contribute to a violation of any water quality
standard;
b. Shall not violate any other provision of this General Permit;
c. Shall not violate any applicable Basin Plan;
d. Shall comply with BMPs as described in the SWPPP;
e. Shall not contain toxic constituents in toxic amounts or (other)
significant quantities of pollutants;
f. Shall be monitored and meets the applicable NALs; and
g. Shall be reported by the discharger in the Annual Report.
If any of the above conditions are not satisfied, the discharge is not
authorized by this General Permit. The discharger shall notify the
Regional Water Board of any anticipated non-storm water discharges not
authorized by this General Permit to determine the need for a separate
NPDES permit.
Additionally, some LUP dischargers may be required to obtain a separate
permit if the applicable Regional Water Board has adopted a General
Permit for dewatering discharges. Wherever feasible, alternatives, that do
not result in the discharge of non-storm water, shall be implemented in
accordance with this Attachment’s Section K.2 - SWPPP Implementation Schedule.
3. LUP dischargers shall ensure that trench spoils or any other soils
disturbed during construction activities that are contaminated5 are not
discharged with storm water or non-storm water discharges into any storm
drain or water body except pursuant to an NPDES permit.
When soil contamination is found or suspected and a responsible party is
not identified, or the responsible party fails to promptly take the
appropriate action, the LUP discharger shall have those soils sampled and
tested to ensure that proper handling and public safety measures are
5 Contaminated soil contains pollutants in concentrations that exceed the appropriate thresholds that various
regulatory agencies set for those substances. Preliminary testing of potentially contaminated soils will be
based on odor, soil discoloration, or prior history of the site's chemical use and storage and other similar
factors. When soil contamination is found or suspected and a responsible party is not identified, or the
responsible party fails to promptly take the appropriate action, the discharger shall have those soils
sampled and tested to ensure proper handling and public safety measures are implemented. The legally
responsible person will notify the appropriate local, State, or federal agency(ies) when contaminated soil is
found at a construction site, and will notify the Regional Water Board by submitting an NOT at the
completion of the project.
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implemented. The LUP discharger shall notify the appropriate local, State,
and federal agency(ies) when contaminated soil is found at a construction
site, and will notify the appropriate Regional Water Board.
4. Discharging any pollutant-laden water that will cause or contribute to an
exceedance of the applicable Regional Water Board’s Basin Plan from a
dewatering site or sediment basin into any receiving water or storm drain
is prohibited.
5. Debris6 resulting from construction activities are prohibited from being
discharged from construction project sites.
E. SPECIAL PROVISIONS
1. Duty to Comply
a. The LUP discharger must comply with all of the conditions of this
General Permit. Any permit noncompliance constitutes a violation of
the Clean Water Act (CWA) and the Porter-Cologne Water Quality
Control Act and is grounds for enforcement action and/or removal from
General Permit coverage.
b. The LUP discharger shall comply with effluent standards or
prohibitions established under Section 307(a) of the CWA for toxic
pollutants within the time provided in the regulations that establish
these standards or prohibitions, even if this General Permit has not yet
been modified to incorporate the requirement.
2. General Permit Actions
a. This General Permit may be modified, revoked and reissued, or
terminated for cause. The filing of a request by the discharger for a
General Permit modification, revocation and reissuance, or
termination, or a notification of planned changes or anticipated
noncompliance does not annul any General Permit condition.
6 Litter, rubble, discarded refuse, and remains of something destroyed.
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b. If any toxic effluent standard or prohibition (including any schedule of
compliance specified in such effluent standard or prohibition) is
promulgated under Section 307(a) of the CWA for a toxic pollutant
which is present in the discharge and that standard or prohibition is
more stringent than any limitation on the pollutant in this General
Permit, this General Permit shall be modified or revoked and reissued
to conform to the toxic effluent standard or prohibition and the
dischargers so notified.
3. Need to Halt or Reduce Activity Not a Defense
It shall not be a defense for an LUP discharger in an enforcement action
that it would have been necessary to halt or reduce the permitted activity
in order to maintain compliance with the conditions of this General Permit.
4. Duty to Mitigate
The LUP discharger shall take all responsible steps to minimize or prevent
any discharge in violation of this General Permit, which has a reasonable
likelihood of adversely affecting human health or the environment.
5. Proper Operation and Maintenance
The LUP discharger shall at all times properly operate and maintain any
facilities and systems of treatment and control (and related
appurtenances) which are installed or used by the discharger to achieve
compliance with the conditions of this General Permit and with the
requirements of the Storm Water Pollution Prevention Plan (SWPPP).
Proper operation and maintenance also includes adequate laboratory
controls and appropriate quality assurance procedures. Proper operation
and maintenance may require the operation of backup or auxiliary facilities
or similar systems installed by a discharger when necessary to achieve
compliance with the conditions of this General Permit.
6. Property Rights
This General Permit does not convey any property rights of any sort or
any exclusive privileges, nor does it authorize any injury to private
property or any invasion of personal rights, nor does it authorize any
infringement of Federal, State, or local laws or regulations.
7. Duty to Maintain Records and Provide Information
a. The LUP discharger shall maintain a paper or electronic copy of all
required records, including a copy of this General Permit, for three
years from the date generated or date submitted, whichever is last.
These records shall be kept at the construction site or in a crew
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member’s vehicle until construction is completed, and shall be made
available upon request.
b. The LUP discharger shall furnish the Regional Water Board, State
Water Board, or USEPA, within a reasonable time, any requested
information to determine compliance with this General Permit. The
LUP discharger shall also furnish, upon request, copies of records that
are required to be kept by this General Permit.
8. Inspection and Entry
The LUP discharger shall allow the Regional Water Board, State Water
Board, USEPA, and/or, in the case of construction sites which discharge
through a municipal separate storm sewer, an authorized representative of
the municipal operator of the separate storm sewer system receiving the
discharge, upon the presentation of credentials and other documents as
may be required by law, to:
a. Enter upon the discharger’s premises at reasonable times where a
regulated construction activity is being conducted or where records
must be kept under the conditions of this General Permit;
b. Access and copy at reasonable times any records that must be kept
under the conditions of this General Permit;
c. Inspect at reasonable times the complete construction site, including
any off-site staging areas or material storage areas, and the
erosion/sediment controls; and
d. Sample or monitor at reasonable times for the purpose of ensuring
General Permit compliance.
9. Electronic Signature and Certification Requirements
a. All Permit Registration Documents (PRDs) and Notices of Termination
(NOTs) shall be electronically signed, certified, and submitted via
SMARTS to the State Water Board. Either the Legally Responsible
Person (LRP), as defined in Appendix 5 – Glossary, or a person legally
authorized to sign and certify PRDs and NOTs on behalf of the LRP
(the LRP’s Approved Signatory, as defined in Appendix 5 - Glossary)
must submit all information electronically via SMARTS.
b. Changes to Authorization. If an Approved Signatory’s authorization is
no longer accurate, a new authorization satisfying the requirements of
paragraph (a) of this section must be submitted via SMARTS prior to or
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together with any reports, information or applications to be signed by
an Approved Signatory.
c. All SWPPP revisions, annual reports, or other information required by
the General Permit (other than PRDs and NOTs) or requested by the
Regional Water Board, State Water Board, USEPA, or local storm
water management agency shall be certified and submitted by the LRP
or the LRP’s Approved Signatory.
10. Certification
Any person signing documents under Section E.9 above, shall make the
following certification:
"I certify under penalty of law that this document and all attachments were
prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate
the information submitted. Based on my inquiry of the person or persons
who manage the system or those persons directly responsible for
gathering the information, to the best of my knowledge and belief, the
information submitted is, true, accurate, and complete. I am aware that
there are significant penalties for submitting false information, including
the possibility of fine and imprisonment for knowing violations."
11. Anticipated Noncompliance
The LUP discharger shall give advance notice to the Regional Water
Board and local storm water management agency of any planned changes
in the construction activity, which may result in noncompliance with
General Permit requirements.
12. Penalties for Falsification of Reports
Section 309(c)(4) of the CWA provides that any person who knowingly
makes any false material statement, representation, or certification in any
record or other document submitted or required to be maintained under
this General Permit, including reports of compliance or noncompliance
shall upon conviction, be punished by a fine of not more than $10,000 or
by imprisonment for not more than two years or by both.
13. Oil and Hazardous Substance Liability
Nothing in this General Permit shall be construed to preclude the
institution of any legal action or relieve the discharger from any
responsibilities, liabilities, or penalties to which the LUP discharger is or
may be subject to under Section 311 of the CWA.
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14. Severability
The provisions of this General Permit are severable; and, if any provision
of this General Permit or the application of any provision of this General
Permit to any circumstance is held invalid, the application of such
provision to other circumstances and the remainder of this General Permit
shall not be affected thereby.
15. Reopener Clause
This General Permit may be modified, revoked and reissued, or
terminated for cause due to promulgation of amended regulations, receipt
of USEPA guidance concerning regulated activities, judicial decision, or in
accordance with 40 Code of Federal Regulations (CFR) 122.62, 122.63,
122.64, and 124.5.
16. Penalties for Violations of Permit Conditions
a. Section 309 of the CWA provides significant penalties for any person
who violates a permit condition implementing Sections 301, 302, 306,
307, 308, 318, or 405 of the CWA or any permit condition or limitation
implementing any such section in a permit issued under Section 402.
Any person who violates any permit condition of this General Permit is
subject to a civil penalty not to exceed $37,5007 per calendar day of
such violation, as well as any other appropriate sanction provided by
Section 309 of the CWA.
b. The Porter-Cologne Water Quality Control Act also provides for civil
and criminal penalties, which in some cases are greater than those
under the CWA.
17. Transfers
This General Permit is not transferable. A new LRP of an ongoing
construction activity must submit PRDs in accordance with the
requirements of this General Permit to be authorized to discharge under
this General Permit. An LRP who is a property owner with active General
Permit coverage who sells a fraction or all the land shall inform the new
property owner(s) of the requirements of this General Permit.
18. Continuation of Expired Permit
This General Permit continues in force and effect until a new General
Permit is issued or the SWRCB rescinds this General Permit. Only those
7 May be further adjusted in accordance with the Federal Civil Penalties Inflation Adjustment Act
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dischargers authorized to discharge under the expiring General Permit are
covered by the continued General Permit.
F. EFFLUENT STANDARDS & RECEIVING WATER MONITORING
1. Narrative Effluent Limitations
a. LUP dischargers shall ensure that storm water discharges and
authorized non-storm water discharges regulated by this General
Permit do not contain a hazardous substance equal to or in excess of
reportable quantities established in 40 C.F.R. §§ 117.3 and 302.4,
unless a separate NPDES Permit has been issued to regulate those
discharges.
b. LUP dischargers shall minimize or prevent pollutants in storm water
discharges and authorized non-storm water discharges through the
use of structural or non-structural controls, structures, and
management practices that achieve BAT for toxic and non-
conventional pollutants and BCT for conventional pollutants.
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Table 1. Numeric Action Levels, Test Methods, Detection Limits, and Reporting Units
Parameter Test
Method
Discharge
Type
Min.
Detection
Limit
Units Numeric
Action
Level
pH
Field test
with
calibrated
portable
instrument
LUP Type 2
0.2 pH
units
lower NAL =
6.5
upper NAL =
8.5
LUP Type 3
lower NAL =
6.5
upper NAL =
8.5
Turbidity EPA
0180.1
and/or field
test with
calibrated
portable
instrument
LUP Type 2
1 NTU
250 NTU
LUP Type 3 250 NTU
ATTACHMENT A
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2. Numeric Action Levels (NALs)
a. For LUP Type 2 and 3 dischargers, the lower storm event daily
average NAL for pH is 6.5 pH units and the upper storm event daily
average NAL for pH is 8.5 pH units. The LUP discharger shall take
actions as described below if the storm event daily average discharge
is outside of this range of pH values.
b. For LUP Type 2 and 3 dischargers, the storm event daily average NAL
for turbidity is 250 NTU. The discharger shall take actions as
described below if the storm event daily average discharge is outside
of this range of turbidity values.
c. Whenever daily average analytical effluent monitoring results indicate
that the discharge is below the lower NAL for pH, exceeds the upper
NAL for pH, or exceeds the turbidity NAL (as listed in Table 1), the
LUP discharger shall conduct a construction site and run-on evaluation
to determine whether pollutant source(s) associated with the site’s
construction activity may have caused or contributed to the NAL
exceedance and shall immediately implement corrective actions if they
are needed.
d. The site evaluation will be documented in the SWPPP and specifically
address whether the source(s) of the pollutants causing the
exceedance of the NAL:
i Are related to the construction activities and whether additional
BMPs or SWPPP implementation measures are required to (1)
meet BAT/BCT requirements; (2) reduce or prevent pollutants in
storm water discharges from causing exceedances of receiving
water objectives; and (3) determine what corrective action(s) were
taken or will be taken and with a description of the schedule for
completion.
AND/OR:
ii Are related to the run-on associated with the construction site
location and whether additional BMPs or SWPPP implementation
measures are required to (1) meet BAT/BCT requirements; (2)
reduce or prevent pollutants in storm water discharges from
causing exceedances of receiving water objectives; and (3) decide
what corrective action(s) were taken or will be taken, including a
description of the schedule for completion.
3. Receiving Water Monitoring Triggers
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a. The receiving water monitoring triggers for LUP Type 3 dischargers
with direct discharges to surface waters are triggered when the daily
average effluent pH values during any site phase when there is a high
risk of pH discharge8 fall outside of the range of 6.0 and 9.0 pH units,
or when the daily average effluent turbidity exceeds 500 NTU.
b. LUP Type 3 dischargers with direct discharges to surface waters shall
conduct receiving water monitoring whenever their effluent monitoring
results exceed the receiving water monitoring triggers. If the pH trigger
is exceeded, the receiving water shall be monitored for pH for the
duration of coverage under this General Permit. If the turbidity trigger
is exceeded, the receiving water shall be monitored for turbidity and
SSC for the duration of coverage under this General Permit.
c. LUP Type 3 dischargers with direct discharges to surfaces waters shall
initiate receiving water monitoring when the triggers are exceeded
unless the storm event causing the exceedance is determined after the
fact to equal to or greater than the 5-year 24-hour storm (expressed in
inches of rainfall) as determined by using these maps:
http://www.wrcc.dri.edu/pcpnfreq/nca5y24.gif
http://www.wrcc.dri.edu/pcpnfreq/sca5y24.gif
Verification of the 5-year 24-hour storm event shall be done by
reporting on-site rain gauge readings as well as nearby governmental
rain gauge readings.
d. If run-on is caused by a forest fire or any other natural disaster, then
receiving water monitoring triggers do not apply.
G. RECEIVING WATER LIMITATIONS
1. LUP dischargers shall ensure that storm water discharges and authorized
non-storm water discharges to any surface or ground water will not
adversely affect human health or the environment.
2. LUP dischargers shall ensure that storm water discharges and authorized
non-storm water discharges will not contain pollutants in quantities that
threaten to cause pollution or a public nuisance.
3. LUP dischargers shall ensure that storm water discharges and authorized
non-storm water discharges will not contain pollutants that cause or
8 A period of high risk of pH discharge is defined as a project's complete utilities phase, complete vertical
build phase, and any portion of any phase where significant amounts of materials are placed directly on the
land at the site in a manner that could result in significant alterations of the background pH of the
discharges.
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contribute to an exceedance of any applicable water quality objectives or
water quality standards (collectively, WQS) contained in a Statewide
Water Quality Control Plan, the California Toxics Rule, the National Toxics
Rule, or the applicable Regional Water Board’s Water Quality Control Plan
(Basin Plan).
H. TRAINING QUALIFICATIONS
1. General
All persons responsible for implementing requirements of this General
Permit shall be appropriately trained. Training should be both formal and
informal, occur on an ongoing basis, and should include training offered by
recognized governmental agencies or professional organizations.
Persons responsible for preparing, amending and certifying SWPPPs shall
comply with the requirements in this Section H.
2. SWPPP Certification Requirements
a. Qualified SWPPP Developer: The LUP discharger shall ensure that
all SWPPPs be written, amended and certified by a Qualified SWPPP
Developer (QSD). A QSD shall have one of the following registrations
or certifications, and appropriate experience, as required for:
i A California registered professional civil engineer;
ii A California registered professional geologist or engineering
geologist;
iii A California registered landscape architect;
iv A professional hydrologist registered through the American Institute
of Hydrology;
v A certified professional in erosion and sediment control (CPESC) TM
registered through Enviro Cert International, Inc;
vi A certified professional in storm water quality (CPSWQ)TM
registered through Enviro Cert International, Inc.; or
vii A certified professional in erosion and sediment control registered
through the National Institute for Certification in Engineering
Technologies (NICET).
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Effective two years after the adoption date of this General Permit, a
QSD shall have attended a State Water Board-sponsored or
approved QSD training course.
b. The LUP discharger shall ensure that the SWPPP is written and
amended, as needed, to address the specific circumstances for each
construction site covered by this General Permit prior to
commencement of construction activity for any stage.
c. The LUP discharger shall list the name and telephone number of the
currently designated Qualified SWPPP Developer(s) in the SWPPP.
d. Qualified SWPPP Practitioner: The LUP discharger shall ensure that
all elements of any SWPPP for each project will be implemented by a
Qualified SWPPP Practitioner (QSP). A QSP is a person responsible
for non-storm water and storm water visual observations, sampling and
analysis, and for ensuring full compliance with the permit and
implementation of all elements of the SWPPP. Effective two years
from the date of adoption of this General Permit, a QSP shall be either
a QSD or have one of the following certifications:
i A certified erosion, sediment and storm water inspector registered
through Certified Professional in Erosion and Sediment Control,
Inc.; or
ii A certified inspector of sediment and erosion control registered
through Certified Inspector of Sediment and Erosion Control, Inc.
Effective two years after the adoption date of this General Permit, a
QSP shall have attended a State Water Board-sponsored or
approved QSP training course.
e. The LUP discharger shall ensure that the SWPPP include a list of
names of all contractors, subcontractors, and individuals who will be
directed by the Qualified SWPPP Practitioner, and who is ultimately
responsible for implementation of the SWPPP. This list shall include
telephone numbers and work addresses. Specific areas of
responsibility of each subcontractor and emergency contact numbers
shall also be included.
f. The LUP discharger shall ensure that the SWPPP and each
amendment be signed by the Qualified SWPPP Developer. The LUP
discharger shall include a listing of the date of initial preparation and
the dates of each amendment in the SWPPP.
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I. TYPES OF LINEAR PROJECTS
This attachment establishes three types (Type 1, 2 & 3) of complexity for
areas within an LUP or project section based on threat to water quality.
Project area Types are determined through Attachment A.1.
The Type 1 requirements below establish the baseline requirements for all
LUPs subject to this General Permit. Additional requirements for Type 2 and
Type 3 LUPs are labeled.
1. Type 1 LUPs:
LUP dischargers with areas of a LUP designated as Type 1 shall comply
with the requirements in this Attachment. Type 1 LUPs are:
a. Those construction areas where 70 percent or more of the construction
activity occurs on a paved surface and where areas disturbed during
construction will be returned to preconstruction conditions or equivalent
protection established at the end of the construction activities for the
day; or
b. Where greater than 30 percent of construction activities occur within
the non-paved shoulders or land immediately adjacent to paved
surfaces, or where construction occurs on unpaved improved roads,
including their shoulders or land immediately adjacent to them where:
i Areas disturbed during construction will be returned to
preconstruction conditions or equivalent protection is established at
the end of the construction activities for the day to minimize the
potential for erosion and sediment deposition, and
ii Areas where established vegetation was disturbed during
construction will be stabilized and re-vegetated by the end of
project. When required, adequate temporary stabilization BMPs
will be installed and maintained until vegetation is established to
meet minimum cover requirements established in this General
Permit for final stabilization.
c. Where the risk determination is as follows:
i Low sediment risk, low receiving water risk, or
ii Low sediment risk, medium receiving water risk, or
iii Medium sediment risk, low receiving water risk
ATTACHMENT A
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2. Type 2 LUPs:
Type 2 LUPs are determined by the Combined Risk Matrix in Attachment
A.1. Type 2 LUPs have the specified combination of risk:
d. High sediment risk, low receiving water risk, or
e. Medium sediment risk, medium receiving water risk, or
f. Low sediment risk, high receiving water risk
Receiving water risk is either considered “Low” for those areas of the
project that are not in close proximity to a sensitive receiving watershed,
“Medium” for those areas of the project within a sensitive receiving
watershed yet outside of the flood plain of a sensitive receiving water
body, and “High” where the soil disturbance is within close proximity to a
sensitive receiving water body. Project sediment risk is calculated based
on the Risk Factor Worksheet in Attachment C of this General Permit.
3. Type 3 LUPs:
Type 3 LUPs are determined by the Combined Risk Matrix in Attachment
A.1. Type 3 LUPs have the specified combination of risk:
a. High sediment risk, high receiving water risk, or
b. High sediment risk, medium receiving water risk, or
c. Medium sediment risk, high receiving water risk
Receiving water risk is either considered “Medium” for those areas of the
project within a sensitive receiving watershed yet outside of the flood plain
of a sensitive receiving water body, or “High” where the soil disturbance is
within close proximity to a sensitive receiving water body. Project
sediment risk is calculated based on the Risk Factor Worksheet in
Attachment C.
J. LUP TYPE-SPECIFIC REQUIREMENTS
1. Effluent Standards
a. Narrative – LUP dischargers shall comply with the narrative effluent
standards below.
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i Storm water discharges and authorized non-storm water
discharges regulated by this General Permit shall not contain a
hazardous substance equal to or in excess of reportable quantities
established in 40 C.F.R. §§ 117.3 and 302.4, unless a separate
NPDES Permit has been issued to regulate those discharges.
ii LUP dischargers shall minimize or prevent pollutants in storm water
discharges and authorized non-storm water discharges through the
use of controls, structures, and management practices that achieve
BAT for toxic and non-conventional pollutants and BCT for
conventional pollutants.
b. Numeric – LUP Type 1 dischargers are not subject to a numeric
effluent standard
c. Numeric –LUP Type 2 dischargers are subject to a pH NAL of 6.5-8.5,
and a turbidity NAL of 250 NTU.
d. Numeric – LUP Type 3 dischargers are subject to a pH NAL of 6.5-8.5,
and a turbidity NAL of 250 NTU.
2. Good Site Management "Housekeeping"
a. LUP dischargers shall implement good site management (i.e.,
"housekeeping") measures for construction materials that could
potentially be a threat to water quality if discharged. At a minimum, the
good housekeeping measures shall consist of the following:
i Identify the products used and/or expected to be used and the end
products that are produced and/or expected to be produced. This
does not include materials and equipment that are designed to be
outdoors and exposed to environmental conditions (i.e. poles,
equipment pads, cabinets, conductors, insulators, bricks, etc.).
ii Cover and berm loose stockpiled construction materials that are not
actively being used (i.e. soil, spoils, aggregate, fly-ash, stucco,
hydrated lime, etc.).
iii Store chemicals in watertight containers (with appropriate
secondary containment to prevent any spillage or leakage) or in a
storage shed (completely enclosed).
iv Minimize exposure of construction materials to precipitation (not
applicable to materials designed to be outdoors and exposed to the
environment).
ATTACHMENT A
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v Implement BMPs to control the off-site tracking of loose
construction and landscape materials.
b. LUP dischargers shall implement good housekeeping measures for
waste management, which, at a minimum, shall consist of the
following:
i Prevent disposal of any rinse or wash waters or materials on
impervious or pervious site surfaces or into the storm drain system.
ii Ensure the containment of sanitation facilities (e.g., portable toilets)
to prevent discharges of pollutants to the storm water drainage
system or receiving water.
iii Clean or replace sanitation facilities and inspecting them regularly
for leaks and spills.
iv Cover waste disposal containers at the end of every business day
and during a rain event.
v Prevent discharges from waste disposal containers to the storm
water drainage system or receiving water.
vi Contain and securely protect stockpiled waste material from wind
and rain at all times unless actively being used.
vii Implement procedures that effectively address hazardous and non-
hazardous spills.
viii Develop a spill response and implementation element of the
SWPPP prior to commencement of construction activities. The
SWPPP shall require that:
(1) Equipment and materials for cleanup of spills shall be available
on site and that spills and leaks shall be cleaned up immediately
and disposed of properly; and
(2) Appropriate spill response personnel are assigned and trained.
ix Ensure the containment of concrete washout areas and other
washout areas that may contain additional pollutants so there is no
discharge into the underlying soil and onto the surrounding areas.
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c. LUP dischargers shall implement good housekeeping for vehicle
storage and maintenance, which, at a minimum, shall consist of the
following:
i Prevent oil, grease, or fuel from leaking into the ground, storm
drains or surface waters.
ii Implement appropriate BMPs whenever equipment or vehicles are
fueled, maintained or stored.
iii Clean leaks immediately and disposing of leaked materials
properly.
d. LUP dischargers shall implement good housekeeping for landscape
materials, which, at a minimum, shall consist of the following:
i Contain stockpiled materials such as mulches and topsoil when
they are not actively being used.
ii Contain fertilizers and other landscape materials when they are not
actively being used.
iii Discontinue the application of any erodible landscape material at
least 2 days before a forecasted rain event9 or during periods of
precipitation.
iv Applying erodible landscape material at quantities and application
rates according to manufacture recommendations or based on
written specifications by knowledgeable and experienced field
personnel.
v Stacking erodible landscape material on pallets and covering or
storing such materials when not being used or applied.
e. LUP dischargers shall conduct an assessment and create a list of
potential pollutant sources and identify any areas of the site where
additional BMPs are necessary to reduce or prevent pollutants in storm
water discharges and authorized non-storm water discharges. This
potential pollutant list shall be kept with the SWPPP and shall identify
all non-visible pollutants which are known, or should be known, to
occur on the construction site. At a minimum, when developing BMPs,
LUP dischargers shall do the following:
9 50% or greater chance of producing precipitation.
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i Consider the quantity, physical characteristics (e.g., liquid, powder,
solid), and locations of each potential pollutant source handled,
produced, stored, recycled, or disposed of at the site.
ii Consider the degree to which pollutants associated with those
materials may be exposed to and mobilized by contact with storm
water.
iii Consider the direct and indirect pathways that pollutants may be
exposed to storm water or authorized non-storm water discharges.
This shall include an assessment of past spills or leaks, non-storm
water discharges, and discharges from adjoining areas.
iv Ensure retention of sampling, visual observation, and inspection
records.
v Ensure effectiveness of existing BMPs to reduce or prevent
pollutants in storm water discharges and authorized non-storm
water discharges.
f. LUP dischargers shall implement good housekeeping measures on the
construction site to control the air deposition of site materials and from
site operations.
3. Non-Storm Water Management
a. LUP dischargers shall implement measures to control all non-storm
water discharges during construction.
b. LUP dischargers shall wash vehicles in such a manner as to prevent
non-storm water discharges to surface waters or MS4 drainage
systems.
c. LUP dischargers shall clean streets in such a manner as to prevent
unauthorized non-storm water discharges from reaching surface water
or MS4 drainage systems.
4. Erosion Control
a. LUP dischargers shall implement effective wind erosion control.
b. LUP dischargers shall provide effective soil cover for inactive10 areas
and all finished slopes, and utility backfill.
10 Areas of construction activity that have been disturbed and are not scheduled to be re-disturbed for at
least 14 days
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c. LUP dischargers shall limit the use of plastic materials when more
sustainable, environmentally friendly alternatives exist. Where plastic
materials are deemed necessary, the discharger shall consider the use
of plastic materials resistant to solar degradation.
5. Sediment Controls
a. LUP dischargers shall establish and maintain effective perimeter
controls as needed, and implement effective BMPs for all construction
entrances and exits to sufficiently control erosion and sediment
discharges from the site.
b. On sites where sediment basins are to be used, LUP dischargers shall,
at minimum, design sediment basins according to the guidance
provided in CASQA’s Construction BMP Handbook.
c. Additional LUP Type 2 & 3 Requirement: LUP Type 2 & 3
dischargers shall apply linear sediment controls along the toe of the
slope, face of the slope, and at the grade breaks of exposed slopes to
comply with sheet flow lengths11 in accordance with Table 2 below.
Table 2 – Critical Slope/Sheet Flow Length Combinations
Slope Percentage Sheet flow length not
to exceed
0-25% 20 feet
25-50% 15 feet
Over 50% 10 feet
d. Additional LUP Type 2 & 3 Requirement: LUP Type 2 & 3
dischargers shall ensure that construction activity traffic to and from
the project is limited to entrances and exits that employ effective
controls to prevent off-site tracking of sediment.
e. Additional LUP Type 2 & 3 Requirement: LUP Type 2 & 3
dischargers shall ensure that all storm drain inlets and perimeter
controls, runoff control BMPs, and pollutant controls at entrances and
exits (e.g. tire washoff locations) are maintained and protected from
activities that reduce their effectiveness.
f. Additional LUP Type 2 & 3 Requirement: LUP Type 2 & 3
dischargers shall inspect all immediate access roads. At a minimum
daily and prior to any rain event, the discharger shall remove any
11 Sheet flow length is the length that shallow, low velocity flow travels across a site.
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sediment or other construction activity-related materials that are
deposited on the roads (by vacuuming or sweeping).
g. Additional LUP Type 3 Requirement: The Regional Water Board
may require LUP Type 3 dischargers to implement additional site-
specific sediment control requirements if the implementation of the
other requirements in this section are not adequately protecting the
receiving waters.
6. Run-on and Run-off Controls
a. LUP dischargers shall effectively manage all run-on, all runoff within
the site and all runoff that discharges off the site. Run-on from off site-
shall be directed away from all disturbed areas or shall collectively be
in compliance with the effluent limitations in this Attachment.
b. Run-on and runoff controls are not required for Type 1 LUPs unless
the evaluation of quantity and quality of run-on and runoff deems them
necessary or visual inspections show that the site requires such
controls.
7. Inspection, Maintenance and Repair
a. All inspection, maintenance repair and sampling activities at the
discharger’s LUP location shall be performed or supervised by a QSP
representing the discharger. The QSP may delegate any or all of
these activities to an employee trained to do the task(s) appropriately,
but shall ensure adequate deployment.
b. LUP dischargers shall conduct visual inspections and observations
daily during working hours (not recorded). At least once each 24-hour
period during extended storm events, LUP Type 2 & 3 dischargers
shall conduct visual inspections to identify and record BMPs that need
maintenance to operate effectively, that have failed, or that could fail to
operate as intended. Inspectors shall be the QSP or be trained by the
QSP.
c. Upon identifying failures or other shortcomings, as directed by the
QSP, LUP dischargers shall begin implementing repairs or design
changes to BMPs within 72 hours of identification and complete the
changes as soon as possible.
d. For each pre- and post-rain event inspection required, LUP
dischargers shall complete an inspection checklist, using a form
provided by the State Water Board or Regional Water Board or in an
alternative format that includes the information described below.
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e. The LUP discharger shall ensure that the checklist remains on-site or
with the SWPPP. At a minimum, an inspection checklist should
include:
i Inspection date and date the inspection report was written.
ii Weather information, including presence or absence of
precipitation, estimate of beginning of qualifying storm event,
duration of event, time elapsed since last storm, and approximate
amount of rainfall in inches.
iii Site information, including stage of construction, activities
completed, and approximate area of the site exposed.
iv A description of any BMPs evaluated and any deficiencies noted.
v If the construction site is safely accessible during inclement
weather, list the observations of all BMPs: erosion controls,
sediment controls, chemical and waste controls, and non-storm
water controls. Otherwise, list the results of visual inspections at all
relevant outfalls, discharge points, downstream locations and any
projected maintenance activities.
vi Report the presence of noticeable odors or of any visible sheen on
the surface of any discharges.
vii Any corrective actions required, including any necessary changes
to the SWPPP and the associated implementation dates.
viii Photographs taken during the inspection, if any.
ix Inspector’s name, title, and signature.
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K. STORM WATER POLLUTION PREVENTION PLAN (SWPPP)
REQUIREMENTS
1. Objectives
SWPPPs for all LUPs shall be developed and amended or revised by a QSD. The SWPPP shall be designed to address the following objectives:
a. All pollutants and their sources, including sources of sediment,
associated with construction activities associated with LUP activity are
controlled;
b. All non-storm water discharges are identified and either eliminated,
controlled, or treated;
c. BMPs are effective and result in the reduction or elimination of
pollutants in storm water discharges and authorized non-storm water
discharges from LUPs during construction; and
d. Stabilization BMPs installed to reduce or eliminate pollutants after
construction is completed are effective and maintained.
2. SWPPP Implementation Schedule
a. LUPs for which PRDs have been submitted to the State Water Board
shall develop a site/project location SWPPP prior to the start of land-
disturbing activity in accordance with this Section and shall implement
the SWPPP concurrently with commencement of soil-disturbing
activities.
b. For an ongoing LUP involving a change in the LRP, the new LRP shall
review the existing SWPPP and amend it, if necessary, or develop a
new SWPPP within 15 calendar days to conform to the requirements
set forth in this General Permit.
3. Availability
The SWPPP shall be available at the construction site during working hours while construction is occurring and shall be made available upon
request by a State or Municipal inspector. When the original SWPPP is
retained by a crewmember in a construction vehicle and is not currently at the construction site, copies of the BMPs and map/drawing will be left with
the field crew and the original SWPPP shall be made available via a
request by radio/telephone.
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L. REGIONAL WATER BOARD AUTHORITIES
1. Regional Water Boards shall administer the provisions of this General
Permit. Administration of this General Permit may include, but is not
limited to, requesting the submittal of SWPPPs, reviewing SWPPPs,
reviewing monitoring and sampling and analysis reports, conducting
compliance inspections, gathering site information by any medium
including sampling, photo and video documentation, and taking
enforcement actions.
2. Regional Water Boards may terminate coverage under this General
Permit for dischargers who fail to comply with its requirements or where
they determine that an individual NPDES permit is appropriate.
3. Regional Water Boards may issue separate permits for discharges of
storm water associated with construction activity to individual dischargers,
categories of dischargers, or dischargers in a geographic area. Upon
issuance of such permits by a Regional Water Board, dischargers subject
to those permits shall no longer be regulated by this General Permit.
4. Regional Water Boards may direct the discharger to reevaluate the LUP
Type(s) for the project (or elements/areas of the project) and impose the
appropriate level of requirements.
5. Regional Water Boards may terminate coverage under this General
Permit for dischargers who negligently or with willful intent incorrectly
determine or report their LUP Type (e.g., they determine themselves to be
a LUP Type 1 when they are actually a Type 2).
6. Regional Water Boards may review PRDs and reject or accept
applications for permit coverage or may require dischargers to submit a
Report of Waste Discharge / NPDES permit application for Regional
Water Board consideration of individual requirements.
7. Regional Water Boards may impose additional requirements on
dischargers to satisfy TMDL implementation requirements or to satisfy
provisions in their Basin Plans.
8. Regional Water Boards may require additional Monitoring and Reporting
Program Requirements, including sampling and analysis of discharges to
sediment-impaired water bodies.
9. Regional Water Boards may require dischargers to retain records for more
than the three years required by this General Permit.
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10. Based on an LUP’s threat to water quality and complexity, the Regional
Water Board may determine on a case-by-case basis that an LUP, or a
portion of an LUP, is not eligible for the linear project requirements
contained in this Attachment, and require that the discharger comply with
all standard requirements in this General Permit.
11. The Regional Water Board may require additional monitoring and
reporting program requirements including sampling and analysis of
discharges to CWA § 303(d)-listed water bodies. Additional requirements
imposed by the Regional Water Board shall be consistent with the overall
monitoring effort in the receiving waters.
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M. MONITORING AND REPORTING REQUIREMENTS
Table 3. LUP Summary of Monitoring Requirements
LUP
Type
Visual Inspections Sample Collection
Daily Site
BMP
Pre-storm
Event Daily
Storm
BMP
Post
Storm
Storm
Water
Discharge
Receiving
Water
Non-Visible
(when
applicable) Baseline
1 X X
2 X X X X X X
3 X X X X X X X
1. Objectives
LUP dischargers shall prepare a monitoring and reporting program
(M&RP) prior to the start of construction and immediately implement the
program at the start of construction for LUPs. The monitoring program
must be implemented at the appropriate level to protect water quality at all
times throughout the life of the project. The M&RP must be a part of the SWPPP, included as an appendix or separate SWPPP chapter.
2. M&RP Implementation Schedule
a. LUP dischargers shall implement the requirements of this Section at
the time of commencement of construction activity. LUP dischargers
are responsible for implementing these requirements until construction
activity is complete and the site is stabilized.
b. LUP dischargers shall revise the M&RP when:
i Site conditions or construction activities change such that a change
in monitoring is required to comply with the requirements and intent
of this General Permit.
ii The Regional Water Board requires the discharger to revise its
M&RP based on its review of the document. Revisions may
include, but not be limited to, conducting additional site inspections,
submitting reports, and certifications. Revisions shall be submitted
via postal mail or electronic e-mail.
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iii The Regional Water Board may require additional monitoring and
reporting program requirements including sampling and analysis of
discharges to CWA § 303(d)-listed water bodies. Additional
requirements imposed by the Regional Water Board shall be
consistent with the overall monitoring effort in the receiving waters.
3. LUP Type 1 Monitoring and Reporting Requirements
a. LUP Type 1 Inspection Requirements
i LUP Type 1 dischargers shall ensure that all inspections are
conducted by trained personnel. The name(s) and contact
number(s) of the assigned inspection personnel should be listed in
the SWPPP.
ii LUP Type 1 dischargers shall ensure that all visual inspections are
conducted daily during working hours and in conjunction with other
daily activities in areas where active construction is occurring.
iii LUP Type 1 dischargers shall ensure that photographs of the site
taken before, during, and after storm events are taken during
inspections, and submitted through the State Water Board’s
SMARTS website once every three rain events.
iv LUP Type 1 dischargers shall conduct daily visual inspections to
verify that:
(1) Appropriate BMPs for storm water and non-storm water are
being implemented in areas where active construction is
occurring (including staging areas);
(2) Project excavations are closed, with properly protected spoils,
and that road surfaces are cleaned of excavated material and
construction materials such as chemicals by either removing or
storing the material in protective storage containers at the end
of every construction day;
(3) Land areas disturbed during construction are returned to pre-
construction conditions or an equivalent protection is used at the
end of each workday to eliminate or minimize erosion and the
possible discharge of sediment or other pollutants during a rain
event.
v Inspections may be discontinued in non-active construction areas
where soil-disturbing activities are completed and final soil
stabilization is achieved (e.g., paving is completed, substructures
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are installed, vegetation meets minimum cover requirements for
final stabilization, or other stabilization requirements are met).
vi Inspection programs are required for LUP Type 1 projects where
temporary and permanent stabilization BMPs are installed and are
to be monitored after active construction is completed. Inspection
activities shall continue until adequate permanent stabilization is
established and, in areas where re-vegetation is chosen, until
minimum vegetative coverage is established in accordance with
Section C.1 of this Attachment.
b. LUP Type 1 Monitoring Requirements for Non-Visible Pollutants
LUP Type 1 dischargers shall implement sampling and analysis
requirements to monitor non-visible pollutants associated with (1)
construction sites; (2) activities producing pollutants that are not
visually detectable in storm water discharges; and (3) activities which
could cause or contribute to an exceedance of water quality objectives
in the receiving waters.
i Sampling and analysis for non-visible pollutants is only required
where the LUP Type 1 discharger believes pollutants associated
with construction activities have the potential to be discharged with
storm water runoff due to a spill or in the event there was a breach,
malfunction, failure and/or leak of any BMP. Also, failure to
implement BMPs may require sample collection.
(1) Visual observations made during the monitoring program
described above will help the LUP Type 1 discharger determine
when to collect samples.
(2) The LUP Type 1 discharger is not required to sample if one of
the conditions described above (e.g., breach or spill) occurs and
the site is cleaned of material and pollutants and/or BMPs are
implemented prior to the next storm event.
ii LUP Type 1 dischargers shall collect samples down-gradient from
all discharge locations where the visual observations were made
triggering the monitoring, and which can be safely accessed. For
sites where sampling and analysis is required, personnel trained in
water quality sampling procedures shall collect storm water
samples.
iii If sampling for non-visible pollutant parameters is required, LUP
Type 1 dischargers shall ensure that samples be analyzed for
parameters indicating the presence of pollutants identified in the
pollutant source assessment required in Section J.2.a.i.
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iv LUP Type 1 dischargers shall collect samples during the first two
hours of discharge from rain events that occur during business
hours and which generate runoff.
v LUP Type 1 dischargers shall ensure that a sufficiently large
sample of storm water that has not come into contact with the
disturbed soil or the materials stored or used on-site
(uncontaminated sample12) will be collected for comparison with the
discharge sample. Samples shall be collected during the first two
hours of discharge from rain events that occur during daylight hours
and which generate runoff.
vi LUP Type 1 dischargers shall compare the uncontaminated sample
to the samples of discharge using field analysis or through
laboratory analysis. Analyses may include, but are not limited to,
indicator parameters such as: pH, specific conductance, dissolved
oxygen, conductivity, salinity, and Total Dissolved Solids (TDS).
vii For laboratory analyses, all sampling, sample preservation, and
other analyses must be conducted according to test procedures
pursuant to 40 C.F.R. Part 136. LUP Type 1 dischargers shall
ensure that field samples are collected and analyzed according to
manufacturer specifications of the sampling devices employed.
Portable meters shall be calibrated according to manufacturer’s
specification.
viii LUP Type 1 dischargers shall ensure that all field and/or analytical
data are kept in the SWPPP document.
c. LUP Type 1 Visual Observation Exceptions
i LUP Type 1 dischargers shall be prepared to collect samples and
conduct visual observation (inspections) to meet the minimum
visual observation requirements of this Attachment. The Type 1
LUP discharger is not required to physically collect samples or
conduct visual observation (inspections) under the following
conditions:
(1) During dangerous weather conditions such as flooding and
electrical storms;
(2) Outside of scheduled site business hours.
(3) When access to the site is unsafe due to storm events.
12 Sample collected at a location unaffected by contruction activities.
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ii If the LUP Type 1 discharger does not collect the required samples
or visual observation (inspections) due to these exceptions, an
explanation why the sampling or visual observation (inspections)
were not conducted shall be included in both the SWPPP and the
Annual Report.
d. Particle Size Analysis for Risk Justification
LUP Type 1 dischargers utilizing justifying an alternative project risk
shall report a soil particle size analysis used to determine the RUSLE
K-Factor. ASTM D-422 (Standard Test Method for Particle-Size
Analysis of Soils), as revised, shall be used to determine the
percentages of sand, very fine sand, silt, and clay on the site.
4. LUP Type 2 & 3 Monitoring and Reporting Requirements
a. LUP Type 2 & 3 Inspection Requirements
i LUP Type 2 & 3 dischargers shall ensure that all inspections are
conducted by trained personnel. The name(s) and contact
number(s) of the assigned inspection personnel should be listed in
the SWPPP.
ii LUP Type 2 & 3 dischargers shall ensure that all visual inspections
are conducted daily during working hours and in conjunction with
other daily activities in areas where active construction is occurring.
iii LUP Type 2 & 3 dischargers shall ensure that photographs of the
site taken before, during, and after storm events are taken during
inspections, and submitted through the State Water Board’s
SMARTS website once every three rain events.
iv LUP Type 2 & 3 dischargers shall conduct daily visual inspections
to verify that appropriate BMPs for storm water and non-storm
water are being implemented and in place in areas where active
construction is occurring (including staging areas).
v LUP Type 2 & 3 dischargers shall conduct inspections of the
construction site prior to anticipated storm events, during extended
storm events, and after actual storm events to identify areas
contributing to a discharge of storm water associated with
construction activity. Pre-storm inspections are to ensure that
BMPs are properly installed and maintained; post-storm inspections
are to assure that BMPs have functioned adequately. During
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extended storm events, inspections shall be required during normal
working hours for each 24-hour period.
vi Inspections may be discontinued in non-active construction areas
where soil-disturbing activities are completed and final soil
stabilization is achieved (e.g., paving is completed, substructures
are installed, vegetation meets minimum cover requirements for
final stabilization, or other stabilization requirements are met).
vii LUP Type 2 & 3 dischargers shall implement a monitoring program
for inspecting projects that require temporary and permanent
stabilization BMPs after active construction is complete.
Inspections shall ensure that the BMPs are adequate and
maintained. Inspection activities shall continue until adequate
permanent stabilization is established and, in vegetated areas, until
minimum vegetative coverage is established in accordance with
Section C.1 of this Attachment.
viii If possible, LUP Type 2 & 3 dischargers shall install a rain gauge
on-site at an accessible and secure location with readings made
during all storm event inspections. When readings are unavailable,
data from the closest rain gauge with publically available data may
be used.
ix LUP Type 2 & 3 dischargers shall Include and maintain a log of the
inspections conducted in the SWPPP. The log will provide the date
and time of the inspection and who conducted the inspection.
b. LUP Type 2 & 3 Storm Water Effluent Monitoring Requirements
Table 4. LUP Type 2 & 3 Effluent Monitoring Requirements
LUP Type Frequency Effluent Monitoring
2 Minimum of 3 samples per day
characterizing discharges associated with construction
activity from the project active areas of construction.
Turbidity, pH, and non-visible
pollutant parameters (if applicable)
3 Minimum of 3 samples per day
characterizing discharges associated with construction activity from the project active
areas of construction.
turbidity, pH, and non-visible
pollutant parameters (if applicable)
i LUP Type 2 & 3 dischargers shall collect storm water grab samples
from sampling locations characterizing discharges associated with
activity from the LUP active areas of construction. At a minimum, 3
samples shall be collected per day of discharge.
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ii LUP Type 2 & 3 dischargers shall collect samples of stored or
contained storm water that is discharged subsequent to a storm
event producing precipitation of ½ inch or more at the time of
discharge.
iii LUP Type 2 & 3 dischargers shall ensure that storm water grab
sample(s) obtained be representative of the flow and characteristics
of the discharge.
iv LUP Type 2 & 3 dischargers shall analyze their effluent samples
for:
(1) pH and turbidity
(2) Any additional parameter for which monitoring is required by the
Regional Water Board.
c. LUP Type 2 & 3 Storm Water Effluent Sampling Locations
i LUP Type 2 & 3 dischargers shall perform sampling and analysis of
storm water discharges to characterize discharges associated with
construction activity from the entire disturbed project or area.
ii LUP Type 2 & 3 dischargers may monitor and report run-on from
surrounding areas if there is reason to believe run-on may
contribute to exceedance of NALs.
iii LUP Type 2 & 3 dischargers shall select analytical test methods
from the list provided in Table 5 below.
iv LUP Type 2 & 3 dischargers shall ensure that all storm water
sample collection preservation and handling shall be conducted in
accordance with the “Storm Water Sample Collection and Handling
Instructions” below.
d. LUP Type 3 Receiving Water Monitoring Requirements
i In the event that an LUP Type 3 discharger’s effluent exceeds the
receiving water monitoring triggers of 500 NTU turbidity or pH
range of 6.0-9.0, contained in this General Permit and has a direct
discharge to receiving waters, the LUP discharger shall
subsequently sample Receiving Waters (RWs) for turbidity, pH (if
applicable) and SSC for the duration of coverage under this
General Permit. In the event that an LUP Tupe 3 discharger
utilizing ATS with direct discharges into receiving waters discharges
effluent that exceeds the NELs in this permit, the discharger shall
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subsequently sample RWs for turbidity, pH (if applicable), and SSC
for the duration of coverage under this General Permit.
ii LUP Type 3 dischargers that meet the project criteria in Appendix 3
of this General Permit and have more than 30 acres of soil
disturbance in the project area or project section area designated
as Type 3, shall comply with the Bioassessment requirements prior
to commencement of construction activity.
iii LUP Type 3 dischargers shall obtain RW samples in accordance
with the requirements of the Receiving Water Sampling Locations
section (Section M.4.c. of this Attachment).
e. LUP Type 3 Receiving Water Sampling Locations
i Upstream/up-gradient RW samples: LUP Type 3 dischargers
shall obtain any required upstream/up-gradient receiving water
samples from a representative and accessible location as close as
possible to and upstream from the effluent discharge point.
ii Downstream/down-gradient RW samples: LUP Type 3
dischargers shall obtain any required downstream/down-gradient
receiving water samples from a representative and accessible
location as close as possible to and downstream from the effluent
discharge point.
iii If two or more discharge locations discharge to the same receiving
water, LUP Type 3 dischargers may sample the receiving water at
a single upstream and downstream location.
f. LUP Type 2 & 3 Monitoring Requirements for Non-Visible Pollutants
LUP Type 2 & 3 dischargers shall implement sampling and analysis requirements to monitor non-visible pollutants associated with (1)
construction sites; (2) activities producing pollutants that are not
visually detectable in storm water discharges; and (3) activities which
could cause or contribute to an exceedance of water quality objectives
in the receiving waters.
i Sampling and analysis for non-visible pollutants is only required
where LUP Type 2 & 3 dischargers believe pollutants associated
with construction activities have the potential to be discharged with
storm water runoff due to a spill or in the event there was a breach,
malfunction, failure and/or leak of any BMP. Also, failure to
implement BMPs may require sample collection.
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(1) Visual observations made during the monitoring program
described above will help LUP Type 2 & 3 dischargers
determine when to collect samples.
(2) LUP Type 2 & 3 dischargers are not required to sample if one of
the conditions described above (e.g., breach or spill) occurs and
the site is cleaned of material and pollutants and/or BMPs are
implemented prior to the next storm event.
ii LUP Type 2 & 3 dischargers shall collect samples down-gradient
from the discharge locations where the visual observations were
made triggering the monitoring and which can be safely accessed.
For sites where sampling and analysis is required, personnel
trained in water quality sampling procedures shall collect storm
water samples.
iii If sampling for non-visible pollutant parameters is required, LUP
Type 2 & 3 dischargers shall ensure that samples be analyzed for
parameters indicating the presence of pollutants identified in the
pollutant source assessment required in Section J.2.a.i.
iv LUP Type 2 & 3 dischargers shall collect samples during the first
two hours of discharge from rain events that occur during business
hours and which generate runoff.
v LUP Type 2 & 3 dischargers shall ensure that a sufficiently large
sample of storm water that has not come into contact with the
disturbed soil or the materials stored or used on-site
(uncontaminated sample13) will be collected for comparison with the
discharge sample. Samples shall be collected during the first two
hours of discharge from rain events that occur during daylight hours
and which generate runoff.
vi LUP Type 2 & 3 dischargers shall compare the uncontaminated
sample to the samples of discharge using field analysis or through
laboratory analysis. Analyses may include, but are not limited to,
indicator parameters such as: pH, specific conductance, dissolved
oxygen, conductivity, salinity, and Total Dissolved Solids (TDS).
vii For laboratory analyses, all sampling, sample preservation, and
other analyses must be conducted according to test procedures
pursuant to 40 C.F.R. Part 136. LUP Type 2 & 3 dischargers shall
ensure that field samples are collected and analyzed according to
manufacturer specifications of the sampling devices employed.
13 Sample collected at a location unaffected by construction activities
ATTACHMENT A
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–0006-DWQ
40
Portable meters shall be calibrated according to manufacturer’s
specification.
viii LUP Type 2 & 3 dischargers shall ensure that all field and/or
analytical data are kept in the SWPPP document.
g. LUP Type 2 & 3 Visual Observation and Sample Collection Exceptions
i LUP Type 2 & 3 dischargers shall be prepared to collect samples
and conduct visual observation (inspections) to meet the minimum
visual observation requirements of this Attachment. Type 2 & 3
LUP dischargers are not required to physically collect samples or
conduct visual observation (inspections) under the following
conditions:
(1) During dangerous weather conditions such as flooding and
electrical storms;
(2) Outside of scheduled site business hours.
(3) When access to the site is unsafe due to storm events.
ii If the LUP Type 2 or 3 discharger does not collect the required
samples or visual observation (inspections) due to these
exceptions, an explanation why the sampling or visual observation
(inspections) were not conducted shall be included in both the
SWPPP and the Annual Report.
h. LUP Type 2 & 3 Storm Water Sample Collection and Handling
Instructions
LUP Type 2 & 3 dischargers shall refer to Table 5 below for test
Methods, detection Limits, and reporting Units. During storm water
sample collection and handling, the LUP Type 2 & 3 discharger shall:
i Identify the parameters required for testing and the number of
storm water discharge points that will be sampled. Request the
laboratory to provide the appropriate number of sample containers,
types of containers, sample container labels, blank chain of custody
forms, and sample preservation instructions.
ii Determine how to ship the samples to the laboratory. The testing
laboratory should receive samples within 48 hours of the physical
sampling (unless otherwise required by the laboratory). The
options are to either deliver the samples to the laboratory, arrange
to have the laboratory pick them up, or ship them overnight to the
laboratory.
ATTACHMENT A
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–0006-DWQ
41
iii Use only the sample containers provided by the laboratory to
collect and store samples. Use of any other type of containers
could contaminate your samples.
iv Prevent sample contamination, by not touching, or putting anything
into the sample containers before collecting storm water samples.
v Not overfilling sample containers. Overfilling can change the
analytical results.
vi Tightly screw the cap of each sample container without stripping
the threads of the cap.
vii Complete and attach a label to each sample container. The label
shall identify the date and time of sample collection, the person
taking the sample, and the sample collection location or discharge
point. The label should also identify any sample containers that
have been preserved.
viii Carefully pack sample containers into an ice chest or refrigerator to
prevent breakage and maintain temperature during shipment.
Remember to place frozen ice packs into the shipping container.
Samples should be kept as close to 4° C (39° F) as possible until
arriving at the laboratory. Do not freeze samples.
ix Complete a Chain of Custody form for each set of samples. The
Chain of Custody form shall include the discharger’s name,
address, and phone number, identification of each sample
container and sample collection point, person collecting the
samples, the date and time each sample container was filled, and
the analysis that is required for each sample container.
x Upon shipping/delivering the sample containers, obtain both the
signatures of the persons relinquishing and receiving the sample
containers.
xi Designate and train personnel to collect, maintain, and ship
samples in accordance with the above sample protocols and good
laboratory practices.
xii Refer to the Surface Water Ambient Monitoring Program’s
(SWAMP) 2008 Quality Assurance Program Plan (QAPrP) for more
ATTACHMENT A
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–0006-DWQ
42
information on sampling collection and analysis. See
http://www.waterboards.ca.gov/water_issues/programs/swamp/14
Table 5. Test Methods, Detection Limits, Reporting Units and Applicable NALs
Parameter Test
Method
Discharge
Type
Min.
Detection
Limit
Reporting
Units
Numeric
Action
Levels
(LUP Type
3)
Receiving
Water
Monitoring
Trigger
pH Field test
with
calibrated
portable
instrument
Type 2 & 3 0.2 pH units Lower = 6.5
upper = 8.5
Lower = 6.0
upper = 9.0
Turbidity EPA
0180.1
and/or field
test with
calibrated
portable
instrument
Type 2 & 3 1 NTU 250 NTU 500 NTU
SSC ASTM
Method D
3977-9715
Type 3 if
Receiving
Water
Monitoring
Trigger is
exceeded
5 Mg/L N/A N/A
Bioassessment (STE)
Level I of
(SAFIT),16
fixed-count
of 600
org/sample
Type 3
LUPs > 30
acres
N/A N/A N/A N/A
i. LUP Type 2 & 3 Monitoring Methods
i The LUP Type 2 or 3 discharger’s project M&RP shall include a
description of the following items:
(1) Visual observation locations, visual observation procedures, and
visual observation follow-up and tracking procedures.
14 Additional information regarding SWAMP’s QAPrP can be found at:
http://www.waterboards.ca.gov/water_issues/programs/swamp/. 15 ASTM, 1999, Standard Test Method for Determining Sediment Concentration in Water Samples:
American Society of Testing and Materials, D 3977-97, Vol. 11.02, pp. 389-394 16 The current SAFIT STEs (28 November 2006) list requirements for both the Level I and Level II
taxonomic effort, and are located at: http://www.swrcb.ca.gov/swamp/docs/safit/ste_list.pdf. When new
editions are published by SAFIT, they will supersede all previous editions. All editions will be posted at the
State Water Board’s SWAMP website.
ATTACHMENT A
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–0006-DWQ
43
(2) Sampling locations, and sample collection and handling
procedures. This shall include detailed procedures for sample
collection, storage, preservation, and shipping to the testing lab
to assure that consistent quality control and quality assurance is
maintained. Dischargers shall attach to the monitoring program
a copy of the Chain of Custody form used when handling and
shipping samples.
(3) Identification of the analytical methods and related method
detection limits (if applicable) for each parameter required in
Section M.4.f above.
ii LUP Type 2 & 3 dischargers shall ensure that all sampling and
sample preservation be in accordance with the current edition of
"Standard Methods for the Examination of Water and Wastewater"
(American Public Health Association). All monitoring instruments
and equipment (including a discharger’s own field instruments for
measuring pH and turbidity) shall be calibrated and maintained in
accordance with manufacturers' specifications to ensure accurate
measurements. All laboratory analyses shall be conducted
according to test procedures under 40 CFR Part 136, unless other
test procedures have been specified in this General Permit or by
the Regional Water Board. With the exception of field analysis
conducted by the discharger for turbidity and pH, all analyses shall
be sent to and conducted at a laboratory certified for such analyses
by the State Department of Health Services (SSC exception). The
LUP discharger shall conduct its own field analysis of pH and may
conduct its own field analysis of turbidity if the discharger has
sufficient capability (qualified and trained employees, properly
calibrated and maintained field instruments, etc.) to adequately
perform the field analysis.
j. LUP Type 2 & 3 Analytical Methods
LUP Type 2 & 3 dischargers shall refer to Table 5 above for test
Methods, detection Limits, and reporting Units.
i pH: LUP Type 2 & 3 dischargers shall perform pH analysis on-site
with a calibrated pH meter or pH test kit. The LUP discharger shall
record pH monitoring results on paper and retain these records in
accordance with Section M.4.o, below.
ii Turbidity: LUP Type 2 & 3 dischargers shall perform turbidity
analysis using a calibrated turbidity meter (turbidimeter), either on-
site or at an accredited lab. Acceptable test methods include
Standard Method 2130 or USEPA Method 180.1. The results shall
ATTACHMENT A
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–0006-DWQ
44
be recorded in the site log book in Nephelometric Turbidity Units
(NTU).
iii Suspended sediment concentration (SSC): LUP Type 3
dischargers exceeding the turbidity Receiving Water Monitoring
Trigger, shall perform SSC analysis using ASTM Method D3977-
97.
iv Bioassessment: LUP Type 3 dischargers shall perform
bioassessment sampling and analysis according to Appendix 3 of
this General Permit.
k. Watershed Monitoring Option
If an LUP Type 2 or 3 discharger is part of a qualified regional
watershed-based monitoring program the LUP Type 2 or 3 discharger
may be eligible for relief from the monitoring requirements in this
Attachment. The Regional Water Board may approve proposals to
substitute an acceptable watershed-based monitoring program if it
determines that the watershed-based monitoring program will provide
information to determine each discharger’s compliance with the
requirements of this General Permit.
l. Particle Size Analysis for Risk Justification
LUP Type 2 & 3 dischargers justifying an alternative project risk shall
report a soil particle size analysis used to determine the RUSLE K-
Factor. ASTM D-422 (Standard Test Method for Particle-Size Analysis
of Soils), as revised, shall be used to determine the percentages of
sand, very fine sand, silt, and clay on the site.
m. NAL Exceedance Report
i In the event that any effluent sample exceeds an applicable NAL,
the Regional Water Boards may require LUP Type 2 & 3
dischargers to submit NAL Exceedance Reports.
ii LUP Type 2 & 3 dischargers shall certify each NAL Exceedance
Report in accordance with the Special Provisions for Construction
Activity.
iii LUP Type 2 & 3 dischargers shall retain an electronic or paper copy
of each NAL Exceedance Report for a minimum of three years after
the date the exceedance report is filed.
iv LUP Type 2 & 3 dischargers shall include in the NAL Exceedance
Report:
ATTACHMENT A
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–0006-DWQ
45
(1) the analytical method(s), method reporting unit(s), and method
detection limit(s) of each analytical parameter (analytical results
that are less than the method detection limit shall be reported as
“less than the method detection limit”); and
(2) the date, place, time of sampling, visual observation
(inspections), and/or measurements, including precipitation.
(3) Description of the current BMPs associated with the effluent
sample that exceeded the NAL and the proposed corrective
actions taken.
n. Monitoring Records
LUP Type 2 & 3 dischargers shall ensure that records of all storm
water monitoring information and copies of all reports (including Annual
Reports) required by this General Permit be retained for a period of at
least three years. LUP Type 2 & 3 dischargers may retain records off-
site and make them available upon request. These records shall
include:
i The date, place, time of facility inspections, sampling, visual
observation (inspections), and/or measurements, including
precipitation (rain gauge);
ii The individual(s) who performed the facility inspections, sampling,
visual observation (inspections), and or measurements;
iii The date and approximate time of analyses;
iv The individual(s) who performed the analyses;
v A summary of all analytical results from the last three years, the
method detection limits and reporting units, the analytical
techniques or methods used, and all chain of custody forms;
vi Quality assurance/quality control records and results;
vii Non-storm water discharge inspections and visual observation
(inspections) and storm water discharge visual observation records
(see Section M.4.a above);
viii Visual observation and sample collection exception records (see
Section M.4.g above); and
ATTACHMENT A
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–0006-DWQ
46
ix The records of any corrective actions and follow-up activities that
resulted from analytical results, visual observation (inspections), or
inspections.
ATTACHMENT A.1
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
1
ATTACHMENT A.1
LUP Project Area or Project Section Area Type Determination
Yes
No
No
Yes
Yes
Yes
Yes
No
No
Yes
Yes
No
No
No
*See Definition of Terms
** Or: “Will < 30% of the soil disturbance occur on unpaved surfaces?
E
Will
≥ 70% of the
construction
activity occur
on paved
surfaces**?
Will the
construction
activity occur on
unpaved improved
roads, including their
shoulders or land
immediately
adjacent
to them?
Will areas
disturbed
be returned to pre-
construction conditions
or equivalent
condition* at the end
of the day?
Will > 30%
of the construction
activity occur within the
non-paved shoulders or
land immediately
adjacent to paved
surfaces?
Will areas
disturbed be
returned to pre-
construction conditions
or equivalent
condition* at the end
of the day?
Will areas of
established vegetation
disturbed by the
construction be stabilized
and revegetated by the
end of the project?
When
required, will
adequate temporary
stabilization BMPs be
installed and maintained until
vegetation is established to
meet the Permit’s minimum
cover requirements for
final stabilization?
This is a
Project
Type 1 LUP
ATTACHMENT A.1
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
2
ATTACHMENT A.1
LUP Project Area or Project Section Area
Type Determination
LOW MEDIUM HIGH
LOW Type 1 Type 1 Type 2
MEDIUM Type 1 Type 2 Type 3
HIGH Type 2 Type 3 Type 3
E
Receiving
Water Risk:
“HIGH”
Yes
Calculate the Sediment Risk Based on Appendix 1 Risk Factor Worksheet
Project Sediment Risk =
“LOW”: <15 tons/acre
“MEDIUM”: ≥ 15 and < 75 tons/acre; or
“HIGH”: ≥ 75 tons/acre
PROJECT SEDIMENT RISK
RECEIVING
WATER RISK
* See Definition of Terms
Yes
No
No
Receiving
Water Risk:
“LOW”
Is the
project area or
project section area
located within a
Sediment Sensitive
Watershed*?
Is the
project area or section
located within the flood
plain or flood prone area
(riparian zone) of a
Sensitive Receiving
Water Body*?
Receiving
Water Risk:
“MEDIUM”
ATTACHMENT A.1
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
3
ATTACHMENT A.1
Definition of Terms
1. Equivalent Condition – Means disturbed soils such as those from trench excavation are required to be hauled
away, backfilled into the trench, and/or covered (e.g., metal plates, pavement, plastic covers over spoil piles) at the
end of the construction day.
2. Linear Construction Activity – Linear construction activity consists of underground/ overhead facilities that
typically include, but are not limited to, any conveyance, pipe or pipeline for the transportation of any gaseous, liquid
(including water, wastewater for domestic municipal services), liquescent, or slurry substance; any cable line or wire
for the transmission of electrical energy; any cable line or wire for communications (e.g., telephone, telegraph, radio
or television messages); and associated ancillary facilities. Construction activities associated with LUPs include, but
are not limited to those activities necessary for the installation of underground and overhead linear facilities (e.g.,
conduits, substructures, pipelines, towers, poles, cables, wires, connectors, switching, regulating and transforming
equipment and associated ancillary facilities) and include, but are not limited to, underground utility mark-out,
potholing, concrete and asphalt cutting and removal, trenching, excavation, boring and drilling, access road and
pole/ tower pad and cable/ wire pull station, substation construction, substructure installation, construction of tower
footings and/or foundations, pole and tower installations, pipeline installations, welding, concrete and/or pavement
repair or replacement, and stockpile/ borrow locations.
3. Sediment Sensitive Receiving Water Body – Defined as a water body segment that is listed on EPA’s
approved CWA 303(d) list for sedimentation/siltation, turbidity, or is designated with beneficial uses of SPAWN,
MIGRATORY, and COLD.
4. Sediment Sensitive Watershed – Defined as a watershed draining into a receiving water body listed on EPA’s
approved CWA 303(d) list for sedimentation/siltation, turbidity, or a water body designated with beneficial uses
of SPAWN, MIGRATORY, and COLD.
ATTACHMENT A.2
ATTACHMENT A.2
PERMIT REGISTRATION DOCUMENTS (PRDs)
GENERAL INSTRUCTIONS FOR LINEAR UNDERGROUND/OVERHEAD PROJECTS TO
COMPLY WITH THE CONSTRUCTION GENERAL PERMIT
GENERAL INSTRUCTIONS
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
1
Who Must Submit
This permit is effective on July 1, 2010.
The Legally Responsible Person (LRP) for construction activities associated with linear
underground/overhead project (LUP) must electronically apply for coverage under this General
Permit on or after July 1, 2010. If it is determined that the LUP construction activities require an
NPDES permit, the Legally Responsible Person1 (LRP) shall submit PRDs for this General Permit
in accordance with the following:
LUPs associated with Private or Municipal Development Projects
1. For LUPs associated with pre-development and pre-redevelopment construction activities:
The LRP must obtain coverage2 under this General Permit for its pre-development and pre-
redevelopment construction activities where the total disturbed land area of these construction
activities is greater than 1 acre.
2. For LUPs associated with new development and redevelopment construction projects:
The LRP must obtain coverage under this General Permit for LUP construction activities
associated with new development and redevelopment projects where the total disturbed land
area of the LUP is greater than 1 acre. Coverage under this permit is not required where the
same LUP construction activities are covered by another NPDES permit.
LUPs not associated with private or municipal new development or redevelopment projects:
The LRP must obtain coverage under this General Permit on or after July 1, 2010 for its LUP
construction activities where the total disturbed land area is greater than 1 acre.
PRD Submittal Requirements
Prior to the start of construction activities a LRP must submit PRDs and fees to the State Water
Board for each LUP.
New and Ongoing LUPs
Dischargers of new LUPs that commence construction activities after the adoption date of this
General Permit shall file PRDs prior to the commencement of construction and implement the
SWPPP upon the start of construction.
1 person possessing the title of the land on which the construction activities will occur for the regulated site 2 obtain coverage means filing PRDs for the project.
ATTACHMENT A.2
PERMIT REGISTRATION DOCUMENTS (PRDs)
GENERAL INSTRUCTIONS (CONTINUED)
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
2
Dischargers of ongoing LUPs that are currently covered under State Water Board Order No. 2003-
0007 (Small LUP General Permit) shall electronically file Permit Registration Documents no later
than July 1, 2010. After July 1, 2010, all NOIs subject to State Water Board Order No. 2003-0007-
DWQ will be terminated. All existing dischargers shall be exempt from the risk determination
requirements in Attachment A. All existing dischargers are therefore subject to LUP Type 1
requirements regardless of their project’s sediment and receiving water risks. However, a
Regional Board retains the authority to require an existing discharger to comply with the risk
determination requirements in Attachment A.
Where to Apply
The Permit Registration Documents (PRDs) can be found at
www.waterboards.ca.gov/water_issues/programs/stormwater/
Fees
The annual fee for storm water permits are established through the State of California Code of
Regulations.
When Permit Coverage Commences
To obtain coverage under the General Permit, the LRP must include the complete PRDs and the
annual fee. All PRDs deemed incomplete will be rejected with an explanation as to what is
required to complete submittal. Upon receipt of complete PRDs and associated fee, each
discharger will be sent a waste discharger's identification (WDID) number.
Projects and Activities Not Defined As Construction Activity
1. LUP construction activity does not include routine maintenance projects to maintain original line
and grade, hydraulic capacity, or original purpose of the facility. Routine maintenance projects
are projects associated with operations and maintenance activities that are conducted on
existing lines and facilities and within existing right-of-way, easements, franchise agreements or
other legally binding agreements of the discharger. Routine maintenance projects include, but
are not limited to projects that are conducted to:
• Maintain the original purpose of the facility, or hydraulic capacity.
• Update existing lines3 and facilities to comply with applicable codes, standards and
regulations regardless if such projects result in increased capacity.
• Repairing leaks.
Routine maintenance does not include construction of new4 lines or facilities resulting from
compliance with applicable codes, standards and regulations.
3 Update existing lines includes replacing existing lines with new materials or pipes. 4 New lines are those that are not associated with existing facilities and are not part of a project to update or replace existing lines.
ATTACHMENT A.2
PERMIT REGISTRATION DOCUMENTS (PRDs)
GENERAL INSTRUCTIONS (CONTINUED)
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
3
Routine maintenance projects do not include those areas of maintenance projects that are
outside of an existing right-of-way, franchise, easements, or agreements. When a project must
acquire new areas, those areas may be subject to this General Permit based on the area of
disturbed land outside the original right-of-way, easement, or agreement.
2. LUP construction activity does not include field activities associated with the planning and
design of a project (e.g., activities associated with route selection).
3. Tie-ins conducted immediately adjacent to “energized” or “pressurized” facilities by the
discharger are not considered small construction activities where all other LUP construction
activities associated with the tie-in are covered by a NOI and SWPPP of a third party or
municipal agency.
Calculating Land Disturbance Areas of LUPs
The total land area disturbed for LUPs is the sum of the:
• Surface areas of trenches, laterals and ancillary facilities, plus
• Area of the base of stockpiles on unpaved surfaces, plus
• Surface area of the borrow area, plus
• Areas of paved surfaces constructed for the project, plus
• Areas of new roads constructed or areas of major reconstruction to existing roads (e.g.
improvements to two-track surfaces or road widening) for the sole purpose of accessing
construction activities or as part of the final project, plus
• Equipment and material storage, staging, and preparation areas (laydown areas) not on paved
surfaces, plus
• Soil areas outside the surface area of trenches, laterals and ancillary facilities that will be
graded, and/or disturbed by the use of construction equipment, vehicles and machinery during
construction activities.
Stockpiling Areas
Stockpiling areas, borrow areas and the removal of soils from a construction site may or may not
be included when calculating the area of disturbed soil for a site depending on the following
conditions:
• For stockpiling of soils onsite or immediately adjacent to a LUP site and the stockpile is not on a
paved surface, the area of the base of the stockpile is to be included in the disturbed area
calculation.
• The surface area of borrow areas that are onsite or immediately adjacent to a project site are to
be included in the disturbed area calculation.
• For soil that is hauled offsite to a location owned or operated by the discharger that is not a
paved surface, the area of the base of the stockpile is to be included in the disturbed area
calculation except when the offsite location is already subject to a separate storm water permit.
ATTACHMENT A.2
PERMIT REGISTRATION DOCUMENTS (PRDs)
GENERAL INSTRUCTIONS (CONTINUED)
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
4
• For soil that is brought to the project from an off-site location owned or operated by the
discharger the surface area of the borrow pit is to be included in the disturbed area calculation
except when the offsite location is already subject to a separate storm water permit.
• Trench spoils on a paved surface that are either returned to the trench or excavation or hauled
away from the project daily for disposal or reuse will not be included in the disturbed area
calculation.
If you have any questions concerning submittal of PRDs, please call the State Water Board at
(866) 563-3107.
ATTACHMENT B
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
1
ATTACHMENT B
PERMIT REGISTRATION DOCUMENTS (PRDs) TO COMPLY WITH THE TERMS
OF THE GENERAL PERMIT TO DISCHARGE STORM WATER
ASSOCIATED WITH CONSTRUCTION ACTIVITY
GENERAL INSTRUCTIONS
A. All Linear Construction Projects shall comply with the PRD requirements in
Attachment A.2 of this Order.
B. Who Must Submit
Discharges of storm water associated with construction that results in the
disturbance of one acre or more of land must apply for coverage under the
General Construction Storm Water Permit (General Permit). Any construction
activity that is a part of a larger common plan of development or sale must also
be permitted, regardless of size. (For example, if 0.5 acre of a 20-acre
subdivision is disturbed by the construction activities of discharger A and the
remaining 19.5 acres is to be developed by discharger B, discharger A must
obtain a General Storm Water Permit for the 0.5 acre project).
Other discharges from construction activities that are covered under this General
Permit can be found in the General Permit Section II.B.
It is the LRP’s responsibility to obtain coverage under this General Permit by
electronically submitting complete PRDs (Permit Registration Documents).
In all cases, the proper procedures for submitting the PRDs must be completed
before construction can commence.
C. Construction Activity Not Covered By This General Permit
Discharges from construction that are not covered under this General Permit can
be found in the General Permit Sections II.A &B..
D. Annual Fees and Fee Calculation
Annual fees are calculated based upon the total area of land to be disturbed not
the total size of the acreage owned. However, the calculation includes all acres
to be disturbed during the duration of the project. For example, if 10 acres are
scheduled to be disturbed the first year and 10 in each subsequent year for 5
years, the annual fees would be based upon 50 acres of disturbance. The State
Water Board will evaluate adding acreage to an existing Permit Waste Discharge
Identification (WDID) number on a case-by-case basis. In general, any acreage
to be considered must be contiguous to the permitted land area and the existing
ATTACHMENT B
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
2
SWPPP must be appropriate for the construction activity and topography of the
acreage under consideration. As acreage is built out and stabilized or sold, the
Change of Information (COI) form enables the applicant to remove those acres
from inclusion in the annual fee calculation. Checks should be made payable to:
State Water Board.
The Annual fees are established through regulations adopted by the State Water
Board. The total annual fee is the current base fee plus applicable surcharges for
all construction sites submitting an NOI, based on the total acreage to be
disturbed during the life of the project. Annual fees are subject to change by
regulation.
Dischargers that apply for and satisfy the Small Construction Erosivity Wavier
requirements shall pay a fee of $200.00 plus an applicable surcharge, see the
General Permit Section II.B.7.
E. When to Apply
LRP’s proposing to conduct construction activities subject to this General Permit
must submit their PRDs prior to the commencement of construction activity.
F. Requirements for Completing Permit Registration Documents (PRDs)
All dischargers required to comply with this General Permit shall electronically
submit the required PRDs for their type of construction as defined below.
G. Standard PRD Requirements (All Dischargers)
1. Notice of Intent
2. Risk Assessment (Standard or Site-Specific)
3. Site Map
4. SWPPP
5. Annual Fee
6. Certification
H. Additional PRD Requirements Related to Construction Type
1. Discharger in unincorporated areas of the State (not covered under an
adopted Phase I or II SUSMP requirements) and that are not a linear project
shall also submit a completed:
a. Post-Construction Water Balance Calculator (Appendix 2).
2. Dischargers who are proposing to implement ATS shall submit:
a. Complete ATS Plan in accordance with Attachment F at least 14 days
prior to the planned operation of the ATS and a paper copy shall be
available onsite during ATS operation.
ATTACHMENT B
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
3
b. Certification proof that design done by a professional in accordance with
Attachment F.
3. Dischargers who are proposing an alternate Risk Justification:
a. Particle Size Analysis.
I. Exceptions to Standard PRD Requirements
Construction sites with an R value less than 5 as determined in the Risk
Assessment are not required to submit a SWPPP.
J. Description of PRDs
1. Notice of Intent (NOI)
2. Site Map(s) Includes:
a. The project’s surrounding area (vicinity)
b. Site layout
c. Construction site boundaries
d. Drainage areas
e. Discharge locations
f. Sampling locations
g. Areas of soil disturbance (temporary or permanent)
h. Active areas of soil disturbance (cut or fill)
i. Locations of all runoff BMPs
j. Locations of all erosion control BMPs
k. Locations of all sediment control BMPs
l. ATS location (if applicable)
m. Locations of sensitive habitats, watercourses, or other features which are
not to be disturbed
n. Locations of all post-construction BMPs
o. Locations of storage areas for waste, vehicles, service, loading/unloading
of materials, access (entrance/exits) points to construction site, fueling,
and water storage, water transfer for dust control and compaction
practices
3. SWPPPs
A site-specific SWPPP shall be developed by each discharger and shall be
submitted with the PRDs.
4. Risk Assessment
All dischargers shall use the Risk Assessment procedure as describe in the
General Permit Appendix 1.
a. The Standard Risk Assessment includes utilization of the following:
i. Receiving water Risk Assessment interactive map
ATTACHMENT B
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
4
ii. EPA Rainfall Erosivity Factor Calculator Website
iii. Sediment Risk interactive map
iv. Sediment sensitive water bodies list
b. The Site-Specific Risk Assessment includes the completion of the hand
calculated R value Risk Calculator
5. Post-Construction Water Balance Calculator
All dischargers subject to this requirement shall complete the Water Balance
Calculator (in Appendix 2) in accordance with the instructions.
6. ATS Design Document and Certification
All dischargers using ATS must submit electronically their system design (as
well as any supporting documentation) and proof that the system was
designed by a qualified ATS design professional (See Attachment F).
To obtain coverage under the General Permit PRDs must be included and completed.
If any of the required items are missing, the PRD submittal is considered incomplete
and will be rejected. Upon receipt of a complete PRD submittal, the State Water Board
will process the application package in the order received and assign a (WDID) number.
Questions?
If you have any questions on completing the PRDs please email
stormwater@waterboards.ca.gov or call (866) 563-3107.
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
1
ATTACHMENT C
RISK LEVEL 1 REQUIREMENTS
A. Effluent Standards
[These requirements are the same as those in the General Permit order.]
1. Narrative – Risk Level 1 dischargers shall comply with the narrative
effluent standards listed below:
a. Storm water discharges and authorized non-storm water
discharges regulated by this General Permit shall not contain a
hazardous substance equal to or in excess of reportable quantities
established in 40 C.F.R. §§ 117.3 and 302.4, unless a separate
NPDES Permit has been issued to regulate those discharges.
b. Dischargers shall minimize or prevent pollutants in storm water
discharges and authorized non-storm water discharges through the
use of controls, structures, and management practices that achieve
BAT for toxic and non-conventional pollutants and BCT for
conventional pollutants.
2. Numeric – Risk Level 1 dischargers are not subject to a numeric
effluent standard.
B. Good Site Management "Housekeeping"
1. Risk Level 1 dischargers shall implement good site management (i.e.,
"housekeeping") measures for construction materials that could
potentially be a threat to water quality if discharged. At a minimum,
Risk Level 1 dischargers shall implement the following good
housekeeping measures:
a. Conduct an inventory of the products used and/or expected to be
used and the end products that are produced and/or expected to be
produced. This does not include materials and equipment that are
designed to be outdoors and exposed to environmental conditions
(i.e. poles, equipment pads, cabinets, conductors, insulators,
bricks, etc.).
b. Cover and berm loose stockpiled construction materials that are not
actively being used (i.e. soil, spoils, aggregate, fly-ash, stucco,
hydrated lime, etc.).
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
2
c. Store chemicals in watertight containers (with appropriate
secondary containment to prevent any spillage or leakage) or in a
storage shed (completely enclosed).
d. Minimize exposure of construction materials to precipitation. This
does not include materials and equipment that are designed to be
outdoors and exposed to environmental conditions (i.e. poles,
equipment pads, cabinets, conductors, insulators, bricks, etc.).
e. Implement BMPs to prevent the off-site tracking of loose
construction and landscape materials.
2. Risk Level 1 dischargers shall implement good housekeeping
measures for waste management, which, at a minimum, shall consist
of the following:
a. Prevent disposal of any rinse or wash waters or materials on
impervious or pervious site surfaces or into the storm drain system.
b. Ensure the containment of sanitation facilities (e.g., portable toilets)
to prevent discharges of pollutants to the storm water drainage
system or receiving water.
c. Clean or replace sanitation facilities and inspecting them regularly
for leaks and spills.
d. Cover waste disposal containers at the end of every business day
and during a rain event.
e. Prevent discharges from waste disposal containers to the storm
water drainage system or receiving water.
f. Contain and securely protect stockpiled waste material from wind
and rain at all times unless actively being used.
g. Implement procedures that effectively address hazardous and non-
hazardous spills.
h. Develop a spill response and implementation element of the
SWPPP prior to commencement of construction activities. The
SWPPP shall require that:
i. Equipment and materials for cleanup of spills shall be available
on site and that spills and leaks shall be cleaned up immediately
and disposed of properly; and
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
3
ii. Appropriate spill response personnel are assigned and trained.
i. Ensure the containment of concrete washout areas and other
washout areas that may contain additional pollutants so there is no
discharge into the underlying soil and onto the surrounding areas.
3. Risk Level 1 dischargers shall implement good housekeeping for
vehicle storage and maintenance, which, at a minimum, shall consist of
the following:
a. Prevent oil, grease, or fuel to leak in to the ground, storm drains or
surface waters.
b. Place all equipment or vehicles, which are to be fueled, maintained
and stored in a designated area fitted with appropriate BMPs.
c. Clean leaks immediately and disposing of leaked materials
properly.
4. Risk Level 1 dischargers shall implement good housekeeping for
landscape materials, which, at a minimum, shall consist of the
following:
a. Contain stockpiled materials such as mulches and topsoil when
they are not actively being used.
b. Contain fertilizers and other landscape materials when they are not
actively being used.
c. Discontinue the application of any erodible landscape material
within 2 days before a forecasted rain event or during periods of
precipitation.
d. Apply erodible landscape material at quantities and application
rates according to manufacture recommendations or based on
written specifications by knowledgeable and experienced field
personnel.
e. Stack erodible landscape material on pallets and covering or
storing such materials when not being used or applied.
5. Risk Level 1 dischargers shall conduct an assessment and create a list
of potential pollutant sources and identify any areas of the site where
additional BMPs are necessary to reduce or prevent pollutants in storm
water discharges and authorized non-storm water discharges. This
potential pollutant list shall be kept with the SWPPP and shall identify
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
4
all non-visible pollutants which are known, or should be known, to
occur on the construction site. At a minimum, when developing BMPs,
Risk Level 1 dischargers shall do the following:
a. Consider the quantity, physical characteristics (e.g., liquid, powder,
solid), and locations of each potential pollutant source handled,
produced, stored, recycled, or disposed of at the site.
b. Consider the degree to which pollutants associated with those
materials may be exposed to and mobilized by contact with storm
water.
c. Consider the direct and indirect pathways that pollutants may be
exposed to storm water or authorized non-storm water discharges.
This shall include an assessment of past spills or leaks, non-storm
water discharges, and discharges from adjoining areas.
d. Ensure retention of sampling, visual observation, and inspection
records.
e. Ensure effectiveness of existing BMPs to reduce or prevent
pollutants in storm water discharges and authorized non-storm
water discharges.
6. Risk Level 1 dischargers shall implement good housekeeping
measures on the construction site to control the air deposition of site
materials and from site operations. Such particulates can include, but
are not limited to, sediment, nutrients, trash, metals, bacteria, oil and
grease and organics.
C. Non-Storm Water Management
1. Risk Level 1 dischargers shall implement measures to control all non-
storm water discharges during construction.
2. Risk Level 1 dischargers shall wash vehicles in such a manner as to
prevent non-storm water discharges to surface waters or MS4
drainage systems.
3. Risk Level 1 dischargers shall clean streets in such a manner as to
prevent unauthorized non-storm water discharges from reaching
surface water or MS4 drainage systems.
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
5
D. Erosion Control
1. Risk Level 1 dischargers shall implement effective wind erosion
control.
2. Risk Level 1 dischargers shall provide effective soil cover for inactive1
areas and all finished slopes, open space, utility backfill, and
completed lots.
3. Risk Level 1 dischargers shall limit the use of plastic materials when
more sustainable, environmentally friendly alternatives exist. Where
plastic materials are deemed necessary, the discharger shall consider
the use of plastic materials resistant to solar degradation.
E. Sediment Controls
1. Risk Level 1 dischargers shall establish and maintain effective
perimeter controls and stabilize all construction entrances and exits to
sufficiently control erosion and sediment discharges from the site.
2. On sites where sediment basins are to be used, Risk Level 1
dischargers shall, at minimum, design sediment basins according to
the method provided in CASQA’s Construction BMP Guidance
Handbook.
F. Run-on and Runoff Controls
Risk Level 1 dischargers shall effectively manage all run-on, all runoff
within the site and all runoff that discharges off the site. Run-on from off
site shall be directed away from all disturbed areas or shall collectively be
in compliance with the effluent limitations in this General Permit.
G. Inspection, Maintenance and Repair
1. Risk Level 1 dischargers shall ensure that all inspection, maintenance
repair and sampling activities at the project location shall be performed
or supervised by a Qualified SWPPP Practitioner (QSP) representing
the discharger. The QSP may delegate any or all of these activities to
an employee trained to do the task(s) appropriately, but shall ensure
adequate deployment.
2. Risk Level 1 dischargers shall perform weekly inspections and
observations, and at least once each 24-hour period during extended
1 Inactive areas of construction are areas of construction activity that have been disturbed and are not
scheduled to be re-disturbed for at least 14 days.
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
6
storm events, to identify and record BMPs that need maintenance to
operate effectively, that have failed, or that could fail to operate as
intended. Inspectors shall be the QSP or be trained by the QSP.
3. Upon identifying failures or other shortcomings, as directed by the
QSP, Risk Level 1 dischargers shall begin implementing repairs or
design changes to BMPs within 72 hours of identification and complete
the changes as soon as possible.
4. For each inspection required, Risk Level 1 dischargers shall complete
an inspection checklist, using a form provided by the State Water
Board or Regional Water Board or in an alternative format.
5. Risk Level 1 dischargers shall ensure that checklists shall remain
onsite with the SWPPP and at a minimum, shall include:
a. Inspection date and date the inspection report was written.
b. Weather information, including presence or absence of
precipitation, estimate of beginning of qualifying storm event,
duration of event, time elapsed since last storm, and approximate
amount of rainfall in inches.
c. Site information, including stage of construction, activities
completed, and approximate area of the site exposed.
d. A description of any BMPs evaluated and any deficiencies noted.
e. If the construction site is safely accessible during inclement
weather, list the observations of all BMPs: erosion controls,
sediment controls, chemical and waste controls, and non-storm
water controls. Otherwise, list the results of visual inspections at all
relevant outfalls, discharge points, downstream locations and any
projected maintenance activities.
f. Report the presence of noticeable odors or of any visible sheen on
the surface of any discharges.
g. Any corrective actions required, including any necessary changes
to the SWPPP and the associated implementation dates.
h. Photographs taken during the inspection, if any.
i. Inspector’s name, title, and signature.
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
7
H. Rain Event Action Plan
Not required for Risk Level 1 dischargers.
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
8
I. Risk Level 1 Monitoring and Reporting Requirements
Table 1- Summary of Monitoring Requirements
Risk
Level
Visual Inspections Sample Collection
Quarterly
Non-
storm
Water
Discharge
Pre-storm
Event Daily
Storm
BMP
Post
Storm
Storm
Water
Discharge
Receiving
Water Baseline REAP
1 X X X X
1. Construction Site Monitoring Program Requirements
a. Pursuant to Water Code Sections 13383 and 13267, all dischargers
subject to this General Permit shall develop and implement a
written site-specific Construction Site Monitoring Program (CSMP)
in accordance with the requirements of this Section. The CSMP
shall include all monitoring procedures and instructions, location
maps, forms, and checklists as required in this section. The CSMP
shall be developed prior to the commencement of construction
activities, and revised as necessary to reflect project revisions. The
CSMP shall be a part of the Storm Water Pollution Prevention Plan
(SWPPP), included as an appendix or separate SWPPP chapter.
b. Existing dischargers registered under the State Water Board Order
No. 99-08-DWQ shall make and implement necessary revisions to
their Monitoring Programs to reflect the changes in this General
Permit in a timely manner, but no later than July 1, 2010. Existing
dischargers shall continue to implement their existing Monitoring
Programs in compliance with State Water Board Order No. 99-08-
DWQ until the necessary revisions are completed according to the
schedule above.
c. When a change of ownership occurs for all or any portion of the
construction site prior to completion or final stabilization, the new
discharger shall comply with these requirements as of the date the
ownership change occurs.
2. Objectives
The CSMP shall be developed and implemented to address the
following objectives:
a. To demonstrate that the site is in compliance with the Discharge
Prohibitions;
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
9
b. To determine whether non-visible pollutants are present at the
construction site and are causing or contributing to exceedances of
water quality objectives;
c. To determine whether immediate corrective actions, additional Best
Management Practice (BMP) implementation, or SWPPP revisions
are necessary to reduce pollutants in storm water discharges and
authorized non-storm water discharges; and
d. To determine whether BMPs included in the SWPPP are effective
in preventing or reducing pollutants in storm water discharges and
authorized non-storm water discharges.
3. Risk Level 1 - Visual Monitoring (Inspection) Requirements for
Qualifying Rain Events
a. Risk Level 1 dischargers shall visually observe (inspect) storm
water discharges at all discharge locations within two business
days (48 hours) after each qualifying rain event.
b. Risk Level 1 dischargers shall visually observe (inspect) the
discharge of stored or contained storm water that is derived from
and discharged subsequent to a qualifying rain event producing
precipitation of ½ inch or more at the time of discharge. Stored or
contained storm water that will likely discharge after operating
hours due to anticipated precipitation shall be observed prior to the
discharge during operating hours.
c. Risk Level 1 dischargers shall conduct visual observations
(inspections) during business hours only.
d. Risk Level 1 dischargers shall record the time, date and rain gauge
reading of all qualifying rain events.
e. Within 2 business days (48 hours) prior to each qualifying rain
event, Risk Level 1 dischargers shall visually observe (inspect):
i. All storm water drainage areas to identify any spills, leaks, or
uncontrolled pollutant sources. If needed, the discharger shall
implement appropriate corrective actions.
ii. All BMPs to identify whether they have been properly
implemented in accordance with the SWPPP. If needed, the
discharger shall implement appropriate corrective actions.
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
10
iii. Any storm water storage and containment areas to detect leaks
and ensure maintenance of adequate freeboard.
f. For the visual observations (inspections) described in e.i and e.iii
above, Risk Level 1 dischargers shall observe the presence or
absence of floating and suspended materials, a sheen on the
surface, discolorations, turbidity, odors, and source(s) of any
observed pollutants.
g. Within two business days (48 hours) after each qualifying rain
event, Risk Level 1 dischargers shall conduct post rain event visual
observations (inspections) to (1) identify whether BMPs were
adequately designed, implemented, and effective, and (2) identify
additional BMPs and revise the SWPPP accordingly.
h. Risk Level 1 dischargers shall maintain on-site records of all visual
observations (inspections), personnel performing the observations,
observation dates, weather conditions, locations observed, and
corrective actions taken in response to the observations.
4. Risk Level 1 – Visual Observation Exemptions
a. Risk Level 1 dischargers shall be prepared to conduct visual
observation (inspections) until the minimum requirements of
Section I.3 above are completed. Risk Level 1 dischargers are not
required to conduct visual observation (inspections) under the
following conditions:
i. During dangerous weather conditions such as flooding and
electrical storms.
ii. Outside of scheduled site business hours.
b. If no required visual observations (inspections) are collected due to
these exceptions, Risk Level 1 dischargers shall include an
explanation in their SWPPP and in the Annual Report documenting
why the visual observations (inspections) were not conducted.
5. Risk Level 1 – Monitoring Methods
Risk Level 1 dischargers shall include a description of the visual
observation locations, visual observation procedures, and visual
observation follow-up and tracking procedures in the CSMP.
6. Risk Level 1 – Non-Storm Water Discharge Monitoring
Requirements
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
11
a. Visual Monitoring Requirements:
i. Risk Level 1 dischargers shall visually observe (inspect) each
drainage area for the presence of (or indications of prior)
unauthorized and authorized non-storm water discharges and
their sources.
ii. Risk Level 1 dischargers shall conduct one visual observation
(inspection) quarterly in each of the following periods: January-
March, April-June, July-September, and October-December.
Visual observation (inspections) are only required during
daylight hours (sunrise to sunset).
iii. Risk Level 1 dischargers shall ensure that visual observations
(inspections) document the presence or evidence of any non-
storm water discharge (authorized or unauthorized), pollutant
characteristics (floating and suspended material, sheen,
discoloration, turbidity, odor, etc.), and source. Risk Level 1
dischargers shall maintain on-site records indicating the
personnel performing the visual observation (inspections), the
dates and approximate time each drainage area and non-storm
water discharge was observed, and the response taken to
eliminate unauthorized non-storm water discharges and to
reduce or prevent pollutants from contacting non-storm water
discharges.
7. Risk Level 1 – Non-Visible Pollutant Monitoring Requirements
a. Risk Level 1 dischargers shall collect one or more samples during
any breach, malfunction, leakage, or spill observed during a visual
inspection which could result in the discharge of pollutants to
surface waters that would not be visually detectable in storm water.
b. Risk Level 1 dischargers shall ensure that water samples are large
enough to characterize the site conditions.
c. Risk Level 1 dischargers shall collect samples at all discharge
locations that can be safely accessed.
d. Risk Level 1 dischargers shall collect samples during the first two
hours of discharge from rain events that occur during business
hours and which generate runoff.
e. Risk Level 1 dischargers shall analyze samples for all non-visible
pollutant parameters (if applicable) - parameters indicating the
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
12
presence of pollutants identified in the pollutant source assessment
required (Risk Level 1 dischargers shall modify their CSMPs to
address these additional parameters in accordance with any
updated SWPPP pollutant source assessment).
f. Risk Level 1 dischargers shall collect a sample of storm water that
has not come in contact with the disturbed soil or the materials
stored or used on-site (uncontaminated sample) for comparison
with the discharge sample.
g. Risk Level 1 dischargers shall compare the uncontaminated sample
to the samples of discharge using field analysis or through
laboratory analysis.2
h. Risk Level 1 dischargers shall keep all field /or analytical data in the
SWPPP document.
8. Risk Level 1 – Particle Size Analysis for Project Risk Justification
Risk Level 1 dischargers justifying an alternative project risk shall
report a soil particle size analysis used to determine the RUSLE K-
Factor. ASTM D-422 (Standard Test Method for Particle-Size Analysis
of Soils), as revised, shall be used to determine the percentages of
sand, very fine sand, silt, and clay on the site.
9. Risk Level 1 – Records
Risk Level 1 dischargers shall retain records of all storm water
monitoring information and copies of all reports (including Annual
Reports) for a period of at least three years. Risk Level 1 dischargers
shall retain all records on-site while construction is ongoing. These
records include:
a. The date, place, time of facility inspections, sampling, visual
observation (inspections), and/or measurements, including
precipitation.
b. The individual(s) who performed the facility inspections, sampling,
visual observation (inspections), and or measurements.
c. The date and approximate time of analyses.
d. The individual(s) who performed the analyses.
2 For laboratory analysis, all sampling, sample preservation, and analyses must be conducted according to
test procedures under 40 CFR Part 136. Field discharge samples shall be collected and analyzed according
to the specifications of the manufacturer of the sampling devices employed.
ATTACHMENT C
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-2006-DWQ
13
e. A summary of all analytical results from the last three years, the
method detection limits and reporting units, and the analytical
techniques or methods used.
f. Rain gauge readings from site inspections.
g. Quality assurance/quality control records and results.
h. Non-storm water discharge inspections and visual observation
(inspections) and storm water discharge visual observation records
(see Sections I.3 and I.6 above).
i. Visual observation and sample collection exception records (see
Section I.4 above).
j. The records of any corrective actions and follow-up activities that
resulted from analytical results, visual observation (inspections), or
inspections.
ATTACHMENT D
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
1
ATTACHMENT D
RISK LEVEL 2 REQUIREMENTS
A. Effluent Standards
[These requirements are the same as those in the General Permit order.]
1. Narrative – Risk Level 2 dischargers shall comply with the narrative
effluent standards listed below:
a. Storm water discharges and authorized non-storm water
discharges regulated by this General Permit shall not contain a
hazardous substance equal to or in excess of reportable quantities
established in 40 C.F.R. §§ 117.3 and 302.4, unless a separate
NPDES Permit has been issued to regulate those discharges.
b. Dischargers shall minimize or prevent pollutants in storm water
discharges and authorized non-storm water discharges through the
use of controls, structures, and management practices that achieve
BAT for toxic and non-conventional pollutants and BCT for
conventional pollutants.
2. Numeric – Risk level 2 dischargers are subject to a pH NAL of 6.5-8.5,
and a turbidity NAL of 250 NTU.
B. Good Site Management "Housekeeping"
1. Risk Level 2 dischargers shall implement good site management (i.e.,
"housekeeping") measures for construction materials that could
potentially be a threat to water quality if discharged. At a minimum,
Risk Level 2 dischargers shall implement the following good
housekeeping measures:
a. Conduct an inventory of the products used and/or expected to be
used and the end products that are produced and/or expected to be
produced. This does not include materials and equipment that are
designed to be outdoors and exposed to environmental conditions
(i.e. poles, equipment pads, cabinets, conductors, insulators,
bricks, etc.).
b. Cover and berm loose stockpiled construction materials that are not
actively being used (i.e. soil, spoils, aggregate, fly-ash, stucco,
hydrated lime, etc.).
ATTACHMENT D
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
2
c. Store chemicals in watertight containers (with appropriate
secondary containment to prevent any spillage or leakage) or in a
storage shed (completely enclosed).
d. Minimize exposure of construction materials to precipitation. This
does not include materials and equipment that are designed to be
outdoors and exposed to environmental conditions (i.e. poles,
equipment pads, cabinets, conductors, insulators, bricks, etc.).
e. Implement BMPs to prevent the off-site tracking of loose
construction and landscape materials.
2. Risk Level 2 dischargers shall implement good housekeeping
measures for waste management, which, at a minimum, shall consist
of the following:
a. Prevent disposal of any rinse or wash waters or materials on
impervious or pervious site surfaces or into the storm drain system.
b. Ensure the containment of sanitation facilities (e.g., portable toilets)
to prevent discharges of pollutants to the storm water drainage
system or receiving water.
c. Clean or replace sanitation facilities and inspecting them regularly
for leaks and spills.
d. Cover waste disposal containers at the end of every business day
and during a rain event.
e. Prevent discharges from waste disposal containers to the storm
water drainage system or receiving water.
f. Contain and securely protect stockpiled waste material from wind
and rain at all times unless actively being used.
g. Implement procedures that effectively address hazardous and non-
hazardous spills.
h. Develop a spill response and implementation element of the
SWPPP prior to commencement of construction activities. The
SWPPP shall require:
i. Equipment and materials for cleanup of spills shall be available
on site and that spills and leaks shall be cleaned up immediately
and disposed of properly.
ATTACHMENT D
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
3
ii. Appropriate spill response personnel are assigned and trained.
i. Ensure the containment of concrete washout areas and other
washout areas that may contain additional pollutants so there is no
discharge into the underlying soil and onto the surrounding areas.
3. Risk Level 2 dischargers shall implement good housekeeping for
vehicle storage and maintenance, which, at a minimum, shall consist of
the following:
a. Prevent oil, grease, or fuel to leak in to the ground, storm drains or
surface waters.
b. Place all equipment or vehicles, which are to be fueled, maintained
and stored in a designated area fitted with appropriate BMPs.
c. Clean leaks immediately and disposing of leaked materials
properly.
4. Risk Level 2 dischargers shall implement good housekeeping for
landscape materials, which, at a minimum, shall consist of the
following:
a. Contain stockpiled materials such as mulches and topsoil when
they are not actively being used.
b. Contain all fertilizers and other landscape materials when they are
not actively being used.
c. Discontinue the application of any erodible landscape material
within 2 days before a forecasted rain event or during periods of
precipitation.
d. Apply erodible landscape material at quantities and application
rates according to manufacture recommendations or based on
written specifications by knowledgeable and experienced field
personnel.
e. Stack erodible landscape material on pallets and covering or
storing such materials when not being used or applied.
5. Risk Level 2 dischargers shall conduct an assessment and create a list
of potential pollutant sources and identify any areas of the site where
additional BMPs are necessary to reduce or prevent pollutants in storm
water discharges and authorized non-storm water discharges. This
potential pollutant list shall be kept with the SWPPP and shall identify
ATTACHMENT D
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
4
all non-visible pollutants which are known, or should be known, to
occur on the construction site. At a minimum, when developing BMPs,
Risk Level 2 dischargers shall do the following:
a. Consider the quantity, physical characteristics (e.g., liquid, powder,
solid), and locations of each potential pollutant source handled,
produced, stored, recycled, or disposed of at the site.
b. Consider the degree to which pollutants associated with those
materials may be exposed to and mobilized by contact with storm
water.
c. Consider the direct and indirect pathways that pollutants may be
exposed to storm water or authorized non-storm water discharges.
This shall include an assessment of past spills or leaks, non-storm
water discharges, and discharges from adjoining areas.
d. Ensure retention of sampling, visual observation, and inspection
records.
e. Ensure effectiveness of existing BMPs to reduce or prevent
pollutants in storm water discharges and authorized non-storm
water discharges.
6. Risk Level 2 dischargers shall implement good housekeeping
measures on the construction site to control the air deposition of site
materials and from site operations. Such particulates can include, but
are not limited to, sediment, nutrients, trash, metals, bacteria, oil and
grease and organics.
7. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
document all housekeeping BMPs in the SWPPP and REAP(s) in
accordance with the nature and phase of the construction project.
Construction phases at traditional land development projects include
Grading and Land Development Phase, Streets and Utilities, or
Vertical Construction for traditional land development projects.
C. Non-Storm Water Management
1. Risk Level 2 dischargers shall implement measures to control all non-
storm water discharges during construction.
2. Risk Level 2 dischargers shall wash vehicles in such a manner as to
prevent non-storm water discharges to surface waters or MS4
drainage systems.
ATTACHMENT D
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
5
3. Risk Level 2 dischargers shall clean streets in such a manner as to
prevent unauthorized non-storm water discharges from reaching
surface water or MS4 drainage systems.
D. Erosion Control
1. Risk Level 2 dischargers shall implement effective wind erosion
control.
2. Risk Level 2 dischargers shall provide effective soil cover for inactive1
areas and all finished slopes, open space, utility backfill, and
completed lots.
3. Risk Level 2 dischargers shall limit the use of plastic materials when
more sustainable, environmentally friendly alternatives exist. Where
plastic materials are deemed necessary, the discharger shall consider
the use of plastic materials resistant to solar degradation.
E. Sediment Controls
1. Risk Level 2 dischargers shall establish and maintain effective
perimeter controls and stabilize all construction entrances and exits to
sufficiently control erosion and sediment discharges from the site.
2. On sites where sediment basins are to be used, Risk Level 2
dischargers shall, at minimum, design sediment basins according to
the method provided in CASQA’s Construction BMP Guidance
Handbook.
3. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
implement appropriate erosion control BMPs (runoff control and soil
stabilization) in conjunction with sediment control BMPs for areas
under active2 construction.
4. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
apply linear sediment controls along the toe of the slope, face of the
slope, and at the grade breaks of exposed slopes to comply with sheet
flow lengths3 in accordance with Table 1.
1 Inactive areas of construction are areas of construction activity that have been disturbed and are not
scheduled to be re-disturbed for at least 14 days. 2 Active areas of construction are areas undergoing land surface disturbance. This includes construction
activity during the preliminary stage, mass grading stage, streets and utilities stage and the vertical
construction stage. 3 Sheet flow length is the length that shallow, low velocity flow travels across a site.
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Table 1 - Critical Slope/Sheet Flow Length Combinations
Slope Percentage Sheet flow length not
to exceed
0-25% 20 feet
25-50% 15 feet
Over 50% 10 feet
5. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
ensure that construction activity traffic to and from the project is limited
to entrances and exits that employ effective controls to prevent offsite
tracking of sediment.
6. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
ensure that all storm drain inlets and perimeter controls, runoff control
BMPs, and pollutant controls at entrances and exits (e.g. tire washoff
locations) are maintained and protected from activities that reduce their
effectiveness.
7. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
inspect on a daily basis all immediate access roads daily. At a
minimum daily (when necessary) and prior to any rain event, the
discharger shall remove any sediment or other construction activity-
related materials that are deposited on the roads (by vacuuming or
sweeping).
F. Run-on and Run-off Controls
Risk Level 2 dischargers shall effectively manage all run-on, all runoff
within the site and all runoff that discharges off the site. Run-on from off
site shall be directed away from all disturbed areas or shall collectively be
in compliance with the effluent limitations in this General Permit.
G. Inspection, Maintenance and Repair
1. Risk Level 2 dischargers shall ensure that all inspection, maintenance
repair and sampling activities at the project location shall be performed
or supervised by a Qualified SWPPP Practitioner (QSP) representing
the discharger. The QSP may delegate any or all of these activities to
an employee appropriately trained to do the task(s).
2. Risk Level 2 dischargers shall perform weekly inspections and
observations, and at least once each 24-hour period during extended
storm events, to identify and record BMPs that need maintenance to
operate effectively, that have failed, or that could fail to operate as
intended. Inspectors shall be the QSP or be trained by the QSP.
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3. Upon identifying failures or other shortcomings, as directed by the
QSP, Risk Level 2 dischargers shall begin implementing repairs or
design changes to BMPs within 72 hours of identification and complete
the changes as soon as possible.
4. For each inspection required, Risk Level 2 dischargers shall complete
an inspection checklist, using a form provided by the State Water
Board or Regional Water Board or in an alternative format.
5. Risk Level 2 dischargers shall ensure that checklists shall remain
onsite with the SWPPP and at a minimum, shall include:
a. Inspection date and date the inspection report was written.
b. Weather information, including presence or absence of
precipitation, estimate of beginning of qualifying storm event,
duration of event, time elapsed since last storm, and approximate
amount of rainfall in inches.
c. Site information, including stage of construction, activities
completed, and approximate area of the site exposed.
d. A description of any BMPs evaluated and any deficiencies noted.
e. If the construction site is safely accessible during inclement
weather, list the observations of all BMPs: erosion controls,
sediment controls, chemical and waste controls, and non-storm
water controls. Otherwise, list the results of visual inspections at all
relevant outfalls, discharge points, downstream locations and any
projected maintenance activities.
f. Report the presence of noticeable odors or of any visible sheen on
the surface of any discharges.
g. Any corrective actions required, including any necessary changes
to the SWPPP and the associated implementation dates.
h. Photographs taken during the inspection, if any.
i. Inspector’s name, title, and signature.
H. Rain Event Action Plan
1. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP develop a Rain Event Action Plan (REAP) 48 hours prior to any
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likely precipitation event. A likely precipitation event is any weather
pattern that is forecast to have a 50% or greater probability of
producing precipitation in the project area. The discharger shall
ensure a QSP obtain a printed copy of precipitation forecast
information from the National Weather Service Forecast Office (e.g., by
entering the zip code of the project’s location at
http://www.srh.noaa.gov/forecast).
2. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP develop the REAPs for all phases of construction (i.e., Grading
and Land Development, Streets and Utilities, Vertical Construction,
Final Landscaping and Site Stabilization).
3. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP ensure that the REAP include, at a minimum, the following site
information:
a. Site Address
b. Calculated Risk Level (2 or 3)
c. Site Storm Water Manager Information including the name,
company, and 24-hour emergency telephone number
d. Erosion and Sediment Control Provider information including the
name, company, and 24-hour emergency telephone number
e. Storm Water Sampling Agent information including the name,
company, and 24-hour emergency telephone number
4. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP include in the REAP, at a minimum, the following project phase
information:
a. Activities associated with each construction phase
b. Trades active on the construction site during each construction
phase
c. Trade contractor information
d. Suggested actions for each project phase
5. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP develop additional REAPs for project sites where construction
activities are indefinitely halted or postponed (Inactive Construction).
At a minimum, Inactive Construction REAPs must include:
a. Site Address
b. Calculated Risk Level (2 or 3)
c. Site Storm Water Manager Information including the name,
company, and 24-hour emergency telephone number
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d. Erosion and Sediment Control Provider information including the
name, company, and 24-hour emergency telephone number
e. Storm Water Sampling Agent information including the name,
company, and 24-hour emergency telephone number
f. Trades active on site during Inactive Construction
g. Trade contractor information
h. Suggested actions for inactive construction sites
6. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP begin implementation and make the REAP available onsite no
later than 24 hours prior to the likely precipitation event.
7. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP maintain onsite a paper copy of each REAP onsite in compliance
with the record retention requirements of the Special Provisions in this
General Permit.
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I. Risk Level 2 Monitoring and Reporting Requirements
Table 2- Summary of Monitoring Requirements
Risk
Level
Visual Inspections Sample Collection
Quarterly
Non-
storm
Water
Discharge
Pre-storm
Event Daily
Storm
BMP
Post
Storm
Storm
Water
Discharge
Receiving
Water Baseline REAP
2 X X X X X X
1. Construction Site Monitoring Program Requirements
a. Pursuant to Water Code Sections 13383 and 13267, all dischargers
subject to this General Permit shall develop and implement a
written site-specific Construction Site Monitoring Program (CSMP)
in accordance with the requirements of this Section. The CSMP
shall include all monitoring procedures and instructions, location
maps, forms, and checklists as required in this section. The CSMP
shall be developed prior to the commencement of construction
activities, and revised as necessary to reflect project revisions. The
CSMP shall be a part of the Storm Water Pollution Prevention Plan
(SWPPP), included as an appendix or separate SWPPP chapter.
b. Existing dischargers registered under the State Water Board Order
No. 99-08-DWQ shall make and implement necessary revisions to
their Monitoring Program to reflect the changes in this General
Permit in a timely manner, but no later than July 1, 2010. Existing
dischargers shall continue to implement their existing Monitoring
Programs in compliance with State Water Board Order No. 99-08-
DWQ until the necessary revisions are completed according to the
schedule above.
c. When a change of ownership occurs for all or any portion of the
construction site prior to completion or final stabilization, the new
discharger shall comply with these requirements as of the date the
ownership change occurs.
2. Objectives
The CSMP shall be developed and implemented to address the
following objectives:
a. To demonstrate that the site is in compliance with the Discharge
Prohibitions and applicable Numeric Action Levels (NALs).
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b. To determine whether non-visible pollutants are present at the
construction site and are causing or contributing to exceedances of
water quality objectives.
c. To determine whether immediate corrective actions, additional Best
Management Practice (BMP) implementation, or SWPPP revisions
are necessary to reduce pollutants in storm water discharges and
authorized non-storm water discharges.
d. To determine whether BMPs included in the SWPPP/Rain Event
Action Plan (REAP) are effective in preventing or reducing
pollutants in storm water discharges and authorized non-storm
water discharges.
3. Risk Level 2 – Visual Monitoring (Inspection) Requirements for
Qualifying Rain Events
a. Risk Level 2 dischargers shall visually observe (inspect) storm
water discharges at all discharge locations within two business
days (48 hours) after each qualifying rain event.
b. Risk Level 2 dischargers shall visually observe (inspect) the
discharge of stored or contained storm water that is derived from
and discharged subsequent to a qualifying rain event producing
precipitation of ½ inch or more at the time of discharge. Stored or
contained storm water that will likely discharge after operating
hours due to anticipated precipitation shall be observed prior to the
discharge during operating hours.
c. Risk Level 2 dischargers shall conduct visual observations
(inspections) during business hours only.
d. Risk Level 2 dischargers shall record the time, date and rain gauge
reading of all qualifying rain events.
e. Within 2 business days (48 hours) prior to each qualifying rain
event, Risk Level 2 dischargers shall visually observe (inspect):
i. all storm water drainage areas to identify any spills, leaks, or
uncontrolled pollutant sources. If needed, the discharger shall
implement appropriate corrective actions.
ii. all BMPs to identify whether they have been properly
implemented in accordance with the SWPPP/REAP. If needed,
the discharger shall implement appropriate corrective actions.
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iii. any storm water storage and containment areas to detect leaks
and ensure maintenance of adequate freeboard.
f. For the visual observations (inspections) described in c.i and c.iii
above, Risk Level 2 dischargers shall observe the presence or
absence of floating and suspended materials, a sheen on the
surface, discolorations, turbidity, odors, and source(s) of any
observed pollutants.
g. Within two business days (48 hours) after each qualifying rain
event, Risk Level 2 dischargers shall conduct post rain event visual
observations (inspections) to (1) identify whether BMPs were
adequately designed, implemented, and effective, and (2) identify
additional BMPs and revise the SWPPP accordingly.
h. Risk Level 2 dischargers shall maintain on-site records of all visual
observations (inspections), personnel performing the observations,
observation dates, weather conditions, locations observed, and
corrective actions taken in response to the observations.
4. Risk Level 2 – Water Quality Sampling and Analysis
a. Risk Level 2 dischargers shall collect storm water grab samples
from sampling locations, as defined in Section I.5. The storm water
grab sample(s) obtained shall be representative of the flow and
characteristics of the discharge.
b. At minimum, Risk Level 2 dischargers shall collect 3 samples per
day of the qualifying event.
c. Risk Level 2 dischargers shall ensure that the grab samples
collected of stored or contained storm water are from discharges
subsequent to a qualifying rain event (producing precipitation of
½ inch or more at the time of discharge).
Storm Water Effluent Monitoring Requirements
d. Risk Level 2 dischargers shall analyze their effluent samples for:
i. pH and turbidity.
ii. Any additional parameters for which monitoring is required by
the Regional Water Board.
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5. Risk Level 2 – Storm Water Discharge Water Quality Sampling
Locations
Effluent Sampling Locations
a. Risk Level 2 dischargers shall perform sampling and analysis of
storm water discharges to characterize discharges associated with
construction activity from the entire project disturbed area.
b. Risk Level 2 dischargers shall collect effluent samples at all
discharge points where storm water is discharged off-site.
c. Risk Level 2 dischargers shall ensure that storm water discharge
collected and observed represent4 the effluent in each drainage
area based on visual observation of the water and upstream
conditions.
d. Risk Level 2 dischargers shall monitor and report site run-on from
surrounding areas if there is reason to believe run-on may
contribute to an exceedance of NALs.
e. Risk Level 2 dischargers who deploy an ATS on their site, or a
portion on their site, shall collect ATS effluent samples and
measurements from the discharge pipe or another location
representative of the nature of the discharge.
f. Risk Level 2 dischargers shall select analytical test methods from
the list provided in Table 3 below.
g. All storm water sample collection preservation and handling shall
be conducted in accordance with Section I.7 “Storm Water Sample
Collection and Handling Instructions” below.
6. Risk Level 2 – Visual Observation and Sample Collection
Exemptions
a. Risk Level 2 dischargers shall be prepared to collect samples and
conduct visual observation (inspections) until the minimum
requirements of Sections I.3 and I.4 above are completed. Risk
Level 2 dischargers are not required to physically collect samples
or conduct visual observation (inspections) under the following
conditions:
4 For example, if there has been concrete work recently in an area, or drywall scrap is exposed to the rain, a
pH sample shall be taken of drainage from the relevant work area. Similarly, if sediment laden water is
flowing through some parts of a silt fence, samples shall be taken of the sediment-laden water even if most
water flowing through the fence is clear.
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i. During dangerous weather conditions such as flooding and
electrical storms.
ii. Outside of scheduled site business hours.
b. If no required samples or visual observation (inspections) are
collected due to these exceptions, Risk Level 2 dischargers shall
include an explanation in their SWPPP and in the Annual Report
documenting why the sampling or visual observation (inspections)
were not conducted.
7. Risk Level 2 – Storm Water Sample Collection and Handling
Instructions
a. Risk Level 2 dischargers shall refer to Table 3 below for test
methods, detection limits, and reporting units.
b. Risk Level 2 dischargers shall ensure that testing laboratories will
receive samples within 48 hours of the physical sampling (unless
otherwise required by the laboratory), and shall use only the
sample containers provided by the laboratory to collect and store
samples.
c. Risk Level 2 dischargers shall designate and train personnel to
collect, maintain, and ship samples in accordance with the Surface
Water Ambient Monitoring Program’s (SWAMP) 2008 Quality
Assurance Program Plan (QAPrP).5
8. Risk Level 2 – Monitoring Methods
a. Risk Level 2 dischargers shall include a description of the following
items in the CSMP:
i. Visual observation locations, visual observation procedures, and
visual observation follow-up and tracking procedures.
ii. Sampling locations, and sample collection and handling
procedures. This shall include detailed procedures for sample
collection, storage, preservation, and shipping to the testing lab
to assure that consistent quality control and quality assurance is
maintained. Dischargers shall attach to the monitoring program
5 Additional information regarding SWAMP’s QAPrP can be found at
http://www.waterboards.ca.gov/water_issues/programs/swamp/.
QAPrP:http://www.waterboards.ca.gov/water_issues/programs/swamp/docs/qapp/swamp_qapp_master090
108a.pdf.
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an example Chain of Custody form used when handling and
shipping samples.
iii. Identification of the analytical methods and related method
detection limits (if applicable) for each parameter required in
Section I.4 above.
b. Risk Level 2 dischargers shall ensure that all sampling and sample
preservation are in accordance with the current edition of "Standard
Methods for the Examination of Water and Wastewater" (American
Public Health Association). All monitoring instruments and
equipment (including a discharger’s own field instruments for
measuring pH and turbidity) should be calibrated and maintained in
accordance with manufacturers' specifications to ensure accurate
measurements. Risk Level 2 dischargers shall ensure that all
laboratory analyses are conducted according to test procedures
under 40 CFR Part 136, unless other test procedures have been
specified in this General Permit or by the Regional Water Board.
With the exception of field analysis conducted by the discharger for
turbidity and pH, all analyses should be sent to and conducted at a
laboratory certified for such analyses by the State Department of
Health Services. Risk Level 2 dischargers shall conduct their own
field analysis of pH and may conduct their own field analysis of
turbidity if the discharger has sufficient capability (qualified and
trained employees, properly calibrated and maintained field
instruments, etc.) to adequately perform the field analysis.
9. Risk Level 2 – Analytical Methods
a. Risk Level 2 dischargers shall refer to Table 3 below for test
methods, detection limits, and reporting units.
b. pH: Risk Level 2 dischargers shall perform pH analysis on-site with
a calibrated pH meter or a pH test kit. Risk Level 2 dischargers
shall record pH monitoring results on paper and retain these
records in accordance with Section I.14, below.
c. Turbidity: Risk Level 2 dischargers shall perform turbidity analysis
using a calibrated turbidity meter (turbidimeter), either on-site or at
an accredited lab. Acceptable test methods include Standard
Method 2130 or USEPA Method 180.1. The results will be
recorded in the site log book in Nephelometric Turbidity Units
(NTU).
10. Risk Level 2 - Non-Storm Water Discharge Monitoring
Requirements
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a. Visual Monitoring Requirements:
i. Risk Level 2 dischargers shall visually observe (inspect) each
drainage area for the presence of (or indications of prior)
unauthorized and authorized non-storm water discharges and
their sources.
ii. Risk Level 2 dischargers shall conduct one visual observation
(inspection) quarterly in each of the following periods: January-
March, April-June, July-September, and October-December.
Visual observation (inspections) are only required during
daylight hours (sunrise to sunset).
iii. Risk Level 2 dischargers shall ensure that visual observations
(inspections) document the presence or evidence of any non-
storm water discharge (authorized or unauthorized), pollutant
characteristics (floating and suspended material, sheen,
discoloration, turbidity, odor, etc.), and source. Risk Level 2
dischargers shall maintain on-site records indicating the
personnel performing the visual observation (inspections), the
dates and approximate time each drainage area and non-storm
water discharge was observed, and the response taken to
eliminate unauthorized non-storm water discharges and to
reduce or prevent pollutants from contacting non-storm water
discharges.
b. Effluent Sampling Locations:
i. Risk Level 2 dischargers shall sample effluent at all discharge
points where non-storm water and/or authorized non-storm
water is discharged off-site.
ii. Risk Level 2 dischargers shall send all non-storm water sample
analyses to a laboratory certified for such analyses by the State
Department of Health Services.
iii. Risk Level 2 dischargers shall monitor and report run-on from
surrounding areas if there is reason to believe run-on may
contribute to an exceedance of NALs.
11. Risk Level 2 – Non-Visible Pollutant Monitoring Requirements
a. Risk Level 2 dischargers shall collect one or more samples during
any breach, malfunction, leakage, or spill observed during a visual
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inspection which could result in the discharge of pollutants to
surface waters that would not be visually detectable in storm water.
b. Risk Level 2 dischargers shall ensure that water samples are large
enough to characterize the site conditions.
c. Risk Level 2 dischargers shall collect samples at all discharge
locations that can be safely accessed.
d. Risk Level 2 dischargers shall collect samples during the first two
hours of discharge from rain events that occur during business
hours and which generate runoff.
e. Risk Level 2 dischargers shall analyze samples for all non-visible
pollutant parameters (if applicable) - parameters indicating the
presence of pollutants identified in the pollutant source assessment
required (Risk Level 2 dischargers shall modify their CSMPs to
address these additional parameters in accordance with any
updated SWPPP pollutant source assessment).
f. Risk Level 2 dischargers shall collect a sample of storm water that
has not come in contact with the disturbed soil or the materials
stored or used on-site (uncontaminated sample) for comparison
with the discharge sample.
g. Risk Level 2 dischargers shall compare the uncontaminated sample
to the samples of discharge using field analysis or through
laboratory analysis.6
h. Risk Level 2 dischargers shall keep all field /or analytical data in the
SWPPP document.
12. Risk Level 2 – Watershed Monitoring Option
Risk Level 2 dischargers who are part of a qualified regional
watershed-based monitoring program may be eligible for relief from the
requirements in Sections I.5. The Regional Water Board may approve
proposals to substitute an acceptable watershed-based monitoring
program by determining if the watershed-based monitoring program
will provide substantially similar monitoring information in evaluating
discharger compliance with the requirements of this General Permit.
6 For laboratory analysis, all sampling, sample preservation, and analyses must be conducted
according to test procedures under 40 CFR Part 136. Field discharge samples shall be collected
and analyzed according to the specifications of the manufacturer of the sampling devices
employed.
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13. Risk Level 2 – Particle Size Analysis for Project Risk Justification
Risk Level 2 dischargers justifying an alternative project risk shall
report a soil particle size analysis used to determine the RUSLE
K-Factor. ASTM D-422 (Standard Test Method for Particle-Size
Analysis of Soils), as revised, shall be used to determine the
percentages of sand, very fine sand, silt, and clay on the site.
14. Risk Level 2 – Records
Risk Level 2 dischargers shall retain records of all storm water
monitoring information and copies of all reports (including Annual
Reports) for a period of at least three years. Risk Level 2 dischargers
shall retain all records on-site while construction is ongoing. These
records include:
a. The date, place, time of facility inspections, sampling, visual
observation (inspections), and/or measurements, including
precipitation.
b. The individual(s) who performed the facility inspections, sampling,
visual observation (inspections), and or measurements.
c. The date and approximate time of analyses.
d. The individual(s) who performed the analyses.
e. A summary of all analytical results from the last three years, the
method detection limits and reporting units, the analytical
techniques or methods used, and the chain of custody forms.
f. Rain gauge readings from site inspections;
g. Quality assurance/quality control records and results.
h. Non-storm water discharge inspections and visual observation
(inspections) and storm water discharge visual observation records
(see Sections I.3 and I.10 above).
i. Visual observation and sample collection exception records (see
Section I.6 above).
j. The records of any corrective actions and follow-up activities that
resulted from analytical results, visual observation (inspections), or
inspections.
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15. Risk Level 2 – NAL Exceedance Report
a. In the event that any effluent sample exceeds an applicable NAL,
Risk Level 2 dischargers shall electronically submit all storm event
sampling results to the State Water Board no later than 10 days
after the conclusion of the storm event. The Regional Boards have
the authority to require the submittal of an NAL Exceedance
Report.
b. Risk Level 2 dischargers shall certify each NAL Exceedance Report
in accordance with the Special Provisions for Construction Activity.
c. Risk Level 2 dischargers shall retain an electronic or paper copy of
each NAL Exceedance Report for a minimum of three years after
the date the annual report is filed.
d. Risk Level 2 dischargers shall include in the NAL Exceedance
Report:
i. The analytical method(s), method reporting unit(s), and method
detection limit(s) of each analytical parameter (analytical results
that are less than the method detection limit shall be reported as
“less than the method detection limit”).
ii. The date, place, time of sampling, visual observation
(inspections), and/or measurements, including precipitation.
iii. A description of the current BMPs associated with the effluent
sample that exceeded the NAL and the proposed corrective
actions taken.
ATTACHMENT D 2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ 20 Table 3 – Risk Level 2 Test Methods, Detection Limits, Reporting Units and Applicable NALs/NELs Parameter Test Method / Protocol Discharge Type Min. Detection Limit Reporting Units Numeric Action Level pH Field test with calibrated portable instrument Risk Level 2 Discharges 0.2 pH units lower NAL = 6.5 upper NAL = 8.5 Turbidity EPA 0180.1 and/or field test with calibrated portable instrument Risk Level 2 Discharges other than ATS 1 NTU 250 NTU For ATS discharges 1 NTU N/A
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ATTACHMENT E
RISK LEVEL 3 REQUIREMENTS
A. Effluent Standards
[These requirements are the same as those in the General Permit order.]
1. Narrative – Risk Level 3 dischargers shall comply with the narrative
effluent standards listed below:
a. Storm water discharges and authorized non-storm water
discharges regulated by this General Permit shall not contain a
hazardous substance equal to or in excess of reportable quantities
established in 40 C.F.R. §§ 117.3 and 302.4, unless a separate
NPDES Permit has been issued to regulate those discharges.
b. Dischargers shall minimize or prevent pollutants in storm water
discharges and authorized non-storm water discharges through the
use of controls, structures, and management practices that achieve
BAT for toxic and non-conventional pollutants and BCT for
conventional pollutants.
2. Numeric –Risk Level 3 dischargers are subject to a pH NAL of 6.5-8.5,
and a turbidity NAL of 250 NTU.
B. Good Site Management "Housekeeping"
1. Risk Level 3 dischargers shall implement good site management (i.e.,
"housekeeping") measures for construction materials that could
potentially be a threat to water quality if discharged. At a minimum,
Risk Level 3 dischargers shall implement the following good
housekeeping measures:
a. Conduct an inventory of the products used and/or expected to be
used and the end products that are produced and/or expected to be
produced. This does not include materials and equipment that are
designed to be outdoors and exposed to environmental conditions
(i.e. poles, equipment pads, cabinets, conductors, insulators,
bricks, etc.).
b. Cover and berm loose stockpiled construction materials that are not
actively being used (i.e. soil, spoils, aggregate, fly-ash, stucco,
hydrated lime, etc.).
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c. Store chemicals in watertight containers (with appropriate
secondary containment to prevent any spillage or leakage) or in a
storage shed (completely enclosed).
d. Minimize exposure of construction materials to precipitation. This
does not include materials and equipment that are designed to be
outdoors and exposed to environmental conditions (i.e. poles,
equipment pads, cabinets, conductors, insulators, bricks, etc.).
e. Implement BMPs to prevent the off-site tracking of loose
construction and landscape materials.
2. Risk Level 3 dischargers shall implement good housekeeping
measures for waste management, which, at a minimum, shall consist
of the following:
a. Prevent disposal of any rinse or wash waters or materials on
impervious or pervious site surfaces or into the storm drain system.
b. Ensure the containment of sanitation facilities (e.g., portable toilets)
to prevent discharges of pollutants to the storm water drainage
system or receiving water.
c. Clean or replace sanitation facilities and inspecting them regularly
for leaks and spills.
d. Cover waste disposal containers at the end of every business day
and during a rain event.
e. Prevent discharges from waste disposal containers to the storm
water drainage system or receiving water.
f. Contain and securely protecting stockpiled waste material from
wind and rain at all times unless actively being used.
g. Implement procedures that effectively address hazardous and non-
hazardous spills.
h. Develop a spill response and implementation element of the
SWPPP prior to commencement of construction activities. The
SWPPP shall require that:
i. Equipment and materials for cleanup of spills shall be available
on site and that spills and leaks shall be cleaned up immediately
and disposed of properly; and
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ii. Appropriate spill response personnel are assigned and trained.
i. Ensure the containment of concrete washout areas and other
washout areas that may contain additional pollutants so there is no
discharge into the underlying soil and onto the surrounding areas.
3. Risk Level 3 dischargers shall implement good housekeeping for
vehicle storage and maintenance, which, at a minimum, shall consist of
the following:
a. Prevent oil, grease, or fuel to leak in to the ground, storm drains or
surface waters.
b. Place all equipment or vehicles, which are to be fueled, maintained
and stored in a designated area fitted with appropriate BMPs.
c. Clean leaks immediately and disposing of leaked materials
properly.
4. Risk Level 3 dischargers shall implement good housekeeping for
landscape materials, which, at a minimum, shall consist of the
following:
a. Contain stockpiled materials such as mulches and topsoil when
they are not actively being used.
b. Contain fertilizers and other landscape materials when they are not
actively being used.
c. Discontinuing the application of any erodible landscape material
within 2 days before a forecasted rain event or during periods of
precipitation.
d. Applying erodible landscape material at quantities and application
rates according to manufacture recommendations or based on
written specifications by knowledgeable and experienced field
personnel.
e. Stacking erodible landscape material on pallets and covering or
storing such materials when not being used or applied.
5. Risk Level 3 dischargers shall conduct an assessment and create a list
of potential pollutant sources and identify any areas of the site where
additional BMPs are necessary to reduce or prevent pollutants in storm
water discharges and authorized non-storm water discharges. This
potential pollutant list shall be kept with the SWPPP and shall identify
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all non-visible pollutants which are known, or should be known, to
occur on the construction site. At a minimum, when developing BMPs,
Risk Level 3 dischargers shall do the following:
a. Consider the quantity, physical characteristics (e.g., liquid, powder,
solid), and locations of each potential pollutant source handled,
produced, stored, recycled, or disposed of at the site.
b. Consider the degree to which pollutants associated with those
materials may be exposed to and mobilized by contact with storm
water.
c. Consider the direct and indirect pathways that pollutants may be
exposed to storm water or authorized non-storm water discharges.
This shall include an assessment of past spills or leaks, non-storm
water discharges, and discharges from adjoining areas.
d. Ensure retention of sampling, visual observation, and inspection
records.
e. Ensure effectiveness of existing BMPs to reduce or prevent
pollutants in storm water discharges and authorized non-storm
water discharges.
6. Risk Level 3 dischargers shall implement good housekeeping
measures on the construction site to control the air deposition of site
materials and from site operations. Such particulates can include, but
are not limited to, sediment, nutrients, trash, metals, bacteria, oil and
grease and organics.
7. Additional Risk Level 3 Requirement: Risk Level 3 dischargers shall
document all housekeeping BMPs in the SWPPP and REAP(s) in
accordance with the nature and phase of the construction project.
Construction phases at traditional land development projects include
Grading and Land Development Phase, Streets and Utilities, or
Vertical Construction for traditional land development projects.
C. Non-Storm Water Management
1. Risk Level 3 dischargers shall implement measures to control all non-
storm water discharges during construction.
2. Risk Level 3 dischargers shall wash vehicles in such a manner as to
prevent non-storm water discharges to surface waters or MS4
drainage systems.
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3. Risk Level 3 dischargers shall clean streets in such a manner as to
prevent unauthorized non-storm water discharges from reaching
surface water or MS4 drainage systems.
D. Erosion Control
1. Risk Level 3 dischargers shall implement effective wind erosion
control.
2. Risk Level 3 dischargers shall provide effective soil cover for inactive1
areas and all finished slopes, open space, utility backfill, and
completed lots.
3. Dischargers shall limit the use of plastic materials when more
sustainable, environmentally friendly alternatives exist. Where plastic
materials are deemed necessary, the discharger shall consider the use
of plastic materials resistant to solar degradation.
E. Sediment Controls
1. Risk Level 3 dischargers shall establish and maintain effective
perimeter controls and stabilize all construction entrances and exits to
sufficiently control erosion and sediment discharges from the site.
2. On sites where sediment basins are to be used, Risk Level 3
dischargers shall, at minimum, design sediment basins according to
the method provided in CASQA’s Construction BMP Guidance
Handbook.
3. Additional Risk Level 3 Requirement: Risk Level 3 dischargers shall
implement appropriate erosion control BMPs (runoff control and soil
stabilization) in conjunction with sediment control BMPs for areas
under active2 construction.
4. Additional Risk Level 3 Requirement: Risk Level 3 dischargers shall
apply linear sediment controls along the toe of the slope, face of the
slope, and at the grade breaks of exposed slopes to comply with sheet
flow lengths3 in accordance with Table 1.
1 Inactive areas of construction are areas of construction activity that have been disturbed and are not
scheduled to be re-disturbed for at least 14 days. 2 Active areas of construction are areas undergoing land surface disturbance. This includes construction
activity during the preliminary stage, mass grading stage, streets and utilities stage and the vertical
construction stage 3 Sheet flow length is the length that shallow, low velocity flow travels across a site.
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Table 1 - Critical Slope/Sheet Flow Length Combinations
Slope Percentage Sheet flow length not
to exceed
0-25% 20 feet
25-50% 15 feet
Over 50% 10 feet
5. Additional Risk Level 3 Requirement: Risk Level 3 dischargers shall
ensure that construction activity traffic to and from the project is limited
to entrances and exits that employ effective controls to prevent offsite
tracking of sediment.
6. Additional Risk Level 3 Requirement: Risk Level 3 dischargers shall
ensure that all storm drain inlets and perimeter controls, runoff control
BMPs, and pollutant controls at entrances and exits (e.g. tire washoff
locations) are maintained and protected from activities that reduce their
effectiveness.
7. Additional Risk Level 3 Requirement: Risk Level 3 dischargers shall
inspect on a daily basis all immediate access roads daily. At a
minimum daily (when necessary) and prior to any rain event, the
discharger shall remove any sediment or other construction activity-
related materials that are deposited on the roads (by vacuuming or
sweeping).
8. Additional Risk Level 3 Requirement: The Regional Water Board
may require Risk Level 3 dischargers to implement additional site-
specific sediment control requirements if the implementation of the
other requirements in this section are not adequately protecting the
receiving waters.
F. Run-on and Run-off Controls
Risk Level 3 dischargers shall effectively manage all run-on, all runoff
within the site and all runoff that discharges off the site. Run-on from off
site shall be directed away from all disturbed areas or shall collectively be
in compliance with the effluent limitations in this General Permit.
G. Inspection, Maintenance and Repair
1. Risk Level 3 dischargers shall ensure that all inspection, maintenance
repair and sampling activities at the project location shall be performed
or supervised by a Qualified SWPPP Practitioner (QSP) representing
the discharger. The QSP may delegate any or all of these activities to
an employee appropriately trained to do the task(s).
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2. Risk Level 3 dischargers shall perform weekly inspections and
observations, and at least once each 24-hour period during extended
storm events, to identify and record BMPs that need maintenance to
operate effectively, that have failed, or that could fail to operate as
intended. Inspectors shall be the QSP or be trained by the QSP.
3. Upon identifying failures or other shortcomings, as directed by the
QSP, Risk Level 3 dischargers shall begin implementing repairs or
design changes to BMPs within 72 hours of identification and complete
the changes as soon as possible.
4. For each inspection required, Risk Level 3 dischargers shall complete
an inspection checklist, using a form provided by the State Water
Board or Regional Water Board or in an alternative format.
5. Risk Level 3 dischargers shall ensure that checklists shall remain
onsite with the SWPPP and at a minimum, shall include:
a. Inspection date and date the inspection report was written.
b. Weather information, including presence or absence of
precipitation, estimate of beginning of qualifying storm event,
duration of event, time elapsed since last storm, and approximate
amount of rainfall in inches.
c. Site information, including stage of construction, activities
completed, and approximate area of the site exposed.
d. A description of any BMPs evaluated and any deficiencies noted.
e. If the construction site is safely accessible during inclement
weather, list the observations of all BMPs: erosion controls,
sediment controls, chemical and waste controls, and non-storm
water controls. Otherwise, list the results of visual inspections at all
relevant outfalls, discharge points, downstream locations and any
projected maintenance activities.
f. Report the presence of noticeable odors or of any visible sheen on
the surface of any discharges.
g. Any corrective actions required, including any necessary changes
to the SWPPP and the associated implementation dates.
h. Photographs taken during the inspection, if any.
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i. Inspector’s name, title, and signature.
H. Rain Event Action Plan
1. Additional Risk Level 3 Requirement: The discharger shall ensure a
QSP develop a Rain Event Action Plan (REAP) 48 hours prior to any
likely precipitation event. A likely precipitation event is any weather
pattern that is forecast to have a 50% or greater probability of
producing precipitation in the project area. The QSP shall obtain a
printed copy of precipitation forecast information from the National
Weather Service Forecast Office (e.g., by entering the zip code of the
project’s location at http://www.srh.noaa.gov/forecast).
2. Additional Risk Level 3 Requirement: The discharger shall ensure a
QSP develop the REAPs for all phases of construction (i.e., Grading
and Land Development, Streets and Utilities, Vertical Construction,
Final Landscaping and Site Stabilization).
3. Additional Risk Level 3 Requirement: The discharger shall ensure a
QSP ensure that the REAP include, at a minimum, the following site
information:
a. Site Address.
b. Calculated Risk Level (2 or 3).
c. Site Storm Water Manager Information including the name,
company, and 24-hour emergency telephone number.
d. Erosion and Sediment Control Provider information including the
name, company, and 24-hour emergency telephone number.
e. Storm Water Sampling Agent information including the name,
company, and 24-hour emergency telephone number.
4. Additional Risk Level 3 Requirement: The QSP shall include in the
REAP, at a minimum, the following project phase information:
a. Activities associated with each construction phase.
b. Trades active on the construction site during each construction
phase.
c. Trade contractor information.
d. Suggested actions for each project phase.
5. Additional Risk Level 3 Requirement: The QSP shall develop
additional REAPs for project sites where construction activities are
indefinitely halted or postponed (Inactive Construction). At a minimum,
Inactive Construction REAPs must include:
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a. Site Address.
b. Calculated Risk Level (2 or 3).
c. Site Storm Water Manager Information including the name,
company, and 24-hour emergency telephone number.
d. Erosion and Sediment Control Provider information including the
name, company, and 24-hour emergency telephone number.
e. Storm Water Sampling Agent information including the name,
company, and 24-hour emergency telephone number.
f. Trades active on site during Inactive Construction.
g. Trade contractor information.
h. Suggested actions for inactive construction sites.
6. Additional Risk Level 3 Requirement: The discharger shall ensure a
QSP begin implementation and make the REAP available onsite no
later than 24 hours prior to the likely precipitation event.
7. Additional Risk Level 3 Requirement: The discharger shall ensure a
QSP maintain onsite a paper copy of each REAP onsite in compliance
with the record retention requirements of the Special Provisions in this
General Permit.
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I. Risk Level 3 Monitoring and Reporting Requirements
Table 2- Summary of Monitoring Requirements
Risk
Level
Visual Inspections Sample Collection
Quarterly
Non-
storm
Water
Discharge
Pre-storm
Event Daily
Storm
BMP
Post
Storm
Storm
Water
Discharge
Receiving
Water Baseline REAP
3 X X X X X X X4
1. Construction Site Monitoring Program Requirements
a. Pursuant to Water Code Sections 13383 and 13267, all dischargers
subject to this General Permit shall develop and implement a
written site-specific Construction Site Monitoring Program (CSMP)
in accordance with the requirements of this Section. The CSMP
shall include all monitoring procedures and instructions, location
maps, forms, and checklists as required in this section. The CSMP
shall be developed prior to the commencement of construction
activities, and revised as necessary to reflect project revisions. The
CSMP shall be a part of the Storm Water Pollution Prevention Plan
(SWPPP), included as an appendix or separate SWPPP chapter.
b. Existing dischargers registered under the State Water Board Order
No. 99-08-DWQ shall make and implement necessary revisions to
their Monitoring Program to reflect the changes in this General
Permit in a timely manner, but no later than July 1, 2010. Existing
dischargers shall continue to implement their existing Monitoring
Program in compliance with State Water Board Order No. 99-08-
DWQ until the necessary revisions are completed according to the
schedule above.
c. When a change of ownership occurs for all or any portion of the
construction site prior to completion or final stabilization, the new
discharger shall comply with these requirements as of the date the
ownership change occurs.
2. Objectives
The CSMP shall be developed and implemented to address the
following objectives:
4 When receiving water monitoring trigger is exceeded
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a. To demonstrate that the site is in compliance with the Discharge
Prohibitions and applicable Numeric Action Levels (NALs) of this
General Permit.
b. To determine whether non-visible pollutants are present at the
construction site and are causing or contributing to exceedances of
water quality objectives.
c. To determine whether immediate corrective actions, additional Best
Management Practice (BMP) implementation, or SWPPP revisions
are necessary to reduce pollutants in storm water discharges and
authorized non-storm water discharges.
d. To determine whether BMPs included in the SWPPP/Rain Event
Action Plan (REAP) are effective in preventing or reducing
pollutants in storm water discharges and authorized non-storm
water discharges.
3. Risk Level 3 – Visual Monitoring (Inspection) Requirements for
Qualifying Rain Events
a. Risk Level 3 dischargers shall visually observe (inspect) storm
water discharges at all discharge locations within two business
days (48 hours) after each qualifying rain event.
b. Risk Level 3 dischargers shall visually observe (inspect) the
discharge of stored or contained storm water that is derived from
and discharged subsequent to a qualifying rain event producing
precipitation of ½ inch or more at the time of discharge. Stored or
contained storm water that will likely discharge after operating
hours due to anticipated precipitation shall be observed prior to the
discharge during operating hours.
c. Risk Level 3 dischargers shall conduct visual observations
(inspections) during business hours only.
d. Risk Level 3 dischargers shall record the time, date and rain gauge
reading of all qualifying rain events.
e. Within 2 business days (48 hours) prior to each qualifying rain
event, Risk Level 3 dischargers shall visually observe (inspect):
i. all storm water drainage areas to identify any spills, leaks, or
uncontrolled pollutant sources. If needed, the discharger shall
implement appropriate corrective actions.
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ii. all BMPs to identify whether they have been properly
implemented in accordance with the SWPPP/REAP. If needed,
the discharger shall implement appropriate corrective actions.
iii. any storm water storage and containment areas to detect leaks
and ensure maintenance of adequate freeboard.
f. For the visual observations (inspections) described in c.i. and c.iii
above, Risk Level 3 dischargers shall observe the presence or
absence of floating and suspended materials, a sheen on the
surface, discolorations, turbidity, odors, and source(s) of any
observed pollutants.
g. Within two business days (48 hours) after each qualifying rain
event, Risk Level 3 dischargers shall conduct post rain event visual
observations (inspections) to (1) identify whether BMPs were
adequately designed, implemented, and effective, and (2) identify
additional BMPs and revise the SWPPP accordingly.
h. Risk Level 3 dischargers shall maintain on-site records of all visual
observations (inspections), personnel performing the observations,
observation dates, weather conditions, locations observed, and
corrective actions taken in response to the observations.
4. Risk Level 3 – Water Quality Sampling and Analysis
a. Risk Level 3 dischargers shall collect storm water grab samples
from sampling locations, as defined in Section I.5. The storm water
grab sample(s) obtained shall be representative of the flow and
characteristics of the discharge.
b. At minimum, Risk Level 3 dischargers shall collect 3 samples per
day of the qualifying event.
c. Risk Level 3 dischargers shall ensure that the grab samples
collected of stored or contained storm water are from discharges
subsequent to a qualifying rain event (producing precipitation of ½
inch or more at the time of discharge).
Storm Water Effluent Monitoring Requirements
d. Risk Level 3 dischargers shall analyze their effluent samples for:
i. pH and turbidity.
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ii. Any additional parameters for which monitoring is required by
the Regional Water Board.
e. Risk 3 dischargers shall electronically submit all storm event
sampling results to the State Water Board no later than 10 days
after the conclusion of the storm event.
Receiving Water Monitoring Requirements
f. In the event that a Risk Level 3 discharger’s effluent exceeds the
daily average receiving water monitoring trigger of 500 NTU
turbidity or the daily average pH range 6.0-9.0 contained in this
General Permit and has a direct discharge into receiving waters,
the Risk Level 3 discharger shall subsequently sample receiving
waters (RWs) for turbidity, pH (if applicable), and SSC for the
duration of coverage under this General Permit. If a Risk Level 3
discharger utilizing ATS with direct discharges into receiving waters
discharges effluent that exceeds the NELs in this permit, the
discharger shall subsequently sample RWs for turbidity, pH (if
applicable), and SSC for the duration of coverage under this
General Permit.
g. Risk Level 3 dischargers disturbing 30 acres or more of the
landscape and with direct discharges into receiving waters shall
conduct or participate in benthic macroinvertebrate bioassessment
of RWs prior to commencement of construction activity (See
Appendix 3).
h. Risk Level 3 dischargers shall obtain RW samples in accordance
with the Receiving Water sampling location section (Section I.5),
below.
5. Risk Level 3 – Storm Water Discharge Water Quality Sampling
Locations
Effluent Sampling Locations
a. Risk Level 3 dischargers shall perform sampling and analysis of
storm water discharges to characterize discharges associated with
construction activity from the entire project disturbed area.
b. Risk Level 3 dischargers shall collect effluent samples at all
discharge points where storm water is discharged off-site.
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c. Risk Level 3 dischargers shall ensure that storm water discharge
collected and observed represent5 the effluent in each drainage
area based on visual observation of the water and upstream
conditions.
d. Risk Level 3 dischargers shall monitor and report site run-on from
surrounding areas if there is reason to believe run-on may
contribute to an exceedance of NALs.
e. Risk Level 3 dischargers who deploy an ATS on their site, or a
portion on their site, shall collect ATS effluent samples and
measurements from the discharge pipe or another location
representative of the nature of the discharge.
f. Risk Level 3 dischargers shall select analytical test methods from
the list provided in Table 3 below.
g. All storm water sample collection preservation and handling shall
be conducted in accordance with Section I.7 “Storm Water Sample
Collection and Handling Instructions” below.
Receiving Water Sampling Locations
h. Upstream/up-gradient RW samples: Risk Level 3 dischargers
shall obtain any required upstream/up-gradient receiving water
samples from a representative and accessible location as close as
possible and upstream from the effluent discharge point.
i. Downstream/down-gradient RW samples: Risk Level 3
dischargers shall obtain any required downstream/down-gradient
receiving water samples from a representative and accessible
location as close as possible and downstream from the effluent
discharge point.
j. If two or more discharge locations discharge to the same receiving
water, Risk Level 3 dischargers may sample the receiving water at
a single upstream and downstream location.
5 For example, if there has been concrete work recently in an area, or drywall scrap is exposed to the rain, a
pH sample shall be taken of drainage from the relevant work area. Similarly, if sediment-laden water is
flowing through some parts of a silt fence, samples shall be taken of the sediment laden water even if most
water flowing through the fence is clear.
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6. Risk Level 3 – Visual Observation and Sample Collection
Exemptions
a. Risk Level 3 dischargers shall be prepared to collect samples and
conduct visual observation (inspections) until the minimum
requirements of Sections I.3 and I.4 above are completed. Risk
Level 3 dischargers are not required to physically collect samples
or conduct visual observation (inspections) under the following
conditions:
i. During dangerous weather conditions such as flooding and
electrical storms.
ii. Outside of scheduled site business hours.
b. If no required samples or visual observation (inspections) are
collected due to these exceptions, Risk Level 3 dischargers shall
include an explanation in their SWPPP and in the Annual Report
documenting why the sampling or visual observation (inspections)
were not conducted.
7. Risk Level 3 – Storm Water Sample Collection and Handling
Instructions
a. Risk Level 3 dischargers shall refer to Table 3 below for test
methods, detection limits, and reporting units.
b. Risk Level 3 dischargers shall ensure that testing laboratories will
receive samples within 48 hours of the physical sampling (unless
otherwise required by the laboratory), and shall use only the
sample containers provided by the laboratory to collect and store
samples.
c. Risk Level 3 dischargers shall designate and train personnel to
collect, maintain, and ship samples in accordance with the Surface
Water Ambient Monitoring Program’s (SWAMP) 2008 Quality
Assurance Program Plan (QAPrP).6
6 Additional information regarding SWAMP’s QAPrP can be found at
http://www.waterboards.ca.gov/water_issues/programs/swamp/.
QAPrP:http://www.waterboards.ca.gov/water_issues/programs/swamp/docs/qapp/swamp_qapp_
master090108a.pdf
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8. Risk Level 3 – Monitoring Methods
a. Risk Level 3 dischargers shall include a description of the following
items in the CSMP:
i. Visual observation locations, visual observation procedures, and
visual observation follow-up and tracking procedures.
ii. Sampling locations, and sample collection and handling
procedures. This shall include detailed procedures for sample
collection, storage, preservation, and shipping to the testing lab
to assure that consistent quality control and quality assurance is
maintained. Dischargers shall attach to the monitoring program
an example Chain of Custody form used when handling and
shipping samples.
iii. Identification of the analytical methods and related method
detection limits (if applicable) for each parameter required in
Section I.4 above.
b. Risk Level 3 dischargers shall ensure that all sampling and sample
preservation are in accordance with the current edition of "Standard
Methods for the Examination of Water and Wastewater" (American
Public Health Association). All monitoring instruments and
equipment (including a discharger’s own field instruments for
measuring pH and turbidity) should be calibrated and maintained in
accordance with manufacturers' specifications to ensure accurate
measurements. Risk Level 3 dischargers shall ensure that all
laboratory analyses are conducted according to test procedures
under 40 CFR Part 136, unless other test procedures have been
specified in this General Permit or by the Regional Water Board.
With the exception of field analysis conducted by the discharger for
turbidity and pH, all analyses should be sent to and conducted at a
laboratory certified for such analyses by the State Department of
Health Services (SSC exception). Risk Level 3 dischargers shall
conduct their own field analysis of pH and may conduct their own
field analysis of turbidity if the discharger has sufficient capability
(qualified and trained employees, properly calibrated and
maintained field instruments, etc.) to adequately perform the field
analysis.
9. Risk Level 3 – Analytical Methods
a. Risk Level 3 dischargers shall refer to Table 3 below for test
methods, detection limits, and reporting units.
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b. pH: Risk Level 3 dischargers shall perform pH analysis on-site with
a calibrated pH meter or a pH test kit. Risk Level 3 dischargers
shall record pH monitoring results on paper and retain these
records in accordance with Section I.14, below.
c. Turbidity: Risk Level 3 dischargers shall perform turbidity analysis
using a calibrated turbidity meter (turbidimeter), either on-site or at
an accredited lab. Acceptable test methods include Standard
Method 2130 or USEPA Method 180.1. The results will be
recorded in the site log book in Nephelometric Turbidity Units
(NTU).
d. Suspended sediment concentration (SSC): Risk Level 3
dischargers that exceed the turbidity Receiving Water Monitoring
Trigger shall perform SSC analysis using ASTM Method D3977-97.
e. Bioassessment: Risk Level 3 dischargers shall perform
bioassessment sampling and analysis according to Appendix 3 of
this General Permit.
10. Risk Level 3 - Non-Storm Water Discharge Monitoring
Requirements
a. Visual Monitoring Requirements:
i. Risk Level 3 dischargers shall visually observe (inspect) each
drainage area for the presence of (or indications of prior)
unauthorized and authorized non-storm water discharges and
their sources.
ii. Risk Level 3 dischargers shall conduct one visual observation
(inspection) quarterly in each of the following periods: January-
March, April-June, July-September, and October-December.
Visual observation (inspections) are only required during
daylight hours (sunrise to sunset).
iii. Risk Level 3 dischargers shall ensure that visual observations
(inspections) document the presence or evidence of any non-
storm water discharge (authorized or unauthorized), pollutant
characteristics (floating and suspended material, sheen,
discoloration, turbidity, odor, etc.), and source. Risk Level 3
dischargers shall maintain on-site records indicating the
personnel performing the visual observation (inspections), the
dates and approximate time each drainage area and non-storm
water discharge was observed, and the response taken to
eliminate unauthorized non-storm water discharges and to
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reduce or prevent pollutants from contacting non-storm water
discharges.
b. Effluent Sampling Locations:
i. Risk Level 3 dischargers shall sample effluent at all discharge
points where non-storm water and/or authorized non-storm
water is discharged off-site.
ii. Risk Level 3 dischargers shall send all non-storm water sample
analyses to a laboratory certified for such analyses by the State
Department of Health Services.
iii. Risk Level 3 dischargers shall monitor and report run-on from
surrounding areas if there is reason to believe run-on may
contribute to an exceedance of NALs.
11. Risk Level 3 – Non-Visible Pollutant Monitoring Requirements
a. Risk Level 3 dischargers shall collect one or more samples during
any breach, malfunction, leakage, or spill observed during a visual
inspection which could result in the discharge of pollutants to
surface waters that would not be visually detectable in storm water.
b. Risk Level 3 dischargers shall ensure that water samples are large
enough to characterize the site conditions.
c. Risk Level 3 dischargers shall collect samples at all discharge
locations that can be safely accessed.
d. Risk Level 3 dischargers shall collect samples during the first two
hours of discharge from rain events that occur during business
hours and which generate runoff.
e. Risk Level 3 dischargers shall analyze samples for all non-visible
pollutant parameters (if applicable) - parameters indicating the
presence of pollutants identified in the pollutant source assessment
required (Risk Level 3 dischargers shall modify their CSMPs to
address these additional parameters in accordance with any
updated SWPPP pollutant source assessment).
f. Risk Level 3 dischargers shall collect a sample of storm water that
has not come in contact with the disturbed soil or the materials
stored or used on-site (uncontaminated sample) for comparison
with the discharge sample.
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g. Risk Level 3 dischargers shall compare the uncontaminated sample
to the samples of discharge using field analysis or through
laboratory analysis.7
h. Risk Level 3 dischargers shall keep all field /or analytical data in the
SWPPP document.
12. Risk Level 3 – Watershed Monitoring Option
Risk Level 3 dischargers who are part of a qualified regional
watershed-based monitoring program may be eligible for relief from the
requirements in Sections I.5. The Regional Water Board may approve
proposals to substitute an acceptable watershed-based monitoring
program by determining if the watershed-based monitoring program
will provide substantially similar monitoring information in evaluating
discharger compliance with the requirements of this General Permit.
13. Risk Level 3 – Particle Size Analysis for Project Risk Justification
Risk Level 3 dischargers justifying an alternative project risk shall
report a soil particle size analysis used to determine the RUSLE K-
Factor. ASTM D-422 (Standard Test Method for Particle-Size Analysis
of Soils), as revised, shall be used to determine the percentages of
sand, very fine sand, silt, and clay on the site.
14. Risk Level 3 – Records
Risk Level 3 dischargers shall retain records of all storm water
monitoring information and copies of all reports (including Annual
Reports) for a period of at least three years. Risk Level 3 dischargers
shall retain all records on-site while construction is ongoing. These
records include:
a. The date, place, time of facility inspections, sampling, visual
observation (inspections), and/or measurements, including
precipitation.
b. The individual(s) who performed the facility inspections, sampling,
visual observation (inspections), and or measurements.
c. The date and approximate time of analyses.
7 For laboratory analysis, all sampling, sample preservation, and analyses must be conducted
according to test procedures under 40 CFR Part 136. Field discharge samples shall be collected
and analyzed according to the specifications of the manufacturer of the sampling devices
employed.
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d. The individual(s) who performed the analyses.
e. A summary of all analytical results from the last three years, the
method detection limits and reporting units, the analytical
techniques or methods used, and the chain of custody forms.
f. Rain gauge readings from site inspections.
g. Quality assurance/quality control records and results.
h. Non-storm water discharge inspections and visual observation
(inspections) and storm water discharge visual observation records
(see Sections I.3 and I.10 above).
i. Visual observation and sample collection exception records (see
Section I.6 above).
j. The records of any corrective actions and follow-up activities that
resulted from analytical results, visual observation (inspections), or
inspections.
15. Risk Level 3 – NAL Exceedance Report
a. Risk Level 3 dischargers shall electronically submit all storm event
sampling results to the State Water Board no later than 10 days
after the conclusion of the storm event. The Regional Boards have
the authority to require the submittal of an NAL Exceedance
Report.
b. Risk Level 3 dischargers shall certify each NAL Exceedance Report
in accordance with the Special Provisions for Construction Activity
In this General Permit.
c. Risk Level 3 dischargers shall retain an electronic or paper copy of
each NAL Exceedance Report for a minimum of three years after
the date the annual report is filed.
d. Risk Level 3 dischargers shall include in the NAL Exceedance
Report:
i. The analytical method(s), method reporting unit(s), and method
detection limit(s) of each analytical parameter (analytical results
that are less than the method detection limit shall be reported as
“less than the method detection limit”).
ATTACHMENT E
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21
ii. The date, place, time of sampling, visual observation
(inspections), and/or measurements, including precipitation.
iii. A description of the current BMPs associated with the effluent
sample that exceeded the NAL and the proposed corrective
actions taken.
16. Risk Level 3 – Bioassessment
a. Risk Level 3 dischargers with a total project-related ground
disturbance exceeding 30 acres shall:
i. Conduct bioassessment monitoring, as described in Appendix 3.
ii. Include the collection and reporting of specified in stream
biological data and physical habitat.
iii. Use the bioassessment sample collection and Quality
Assurance & Quality Control (QA/QC) protocols developed by
the State of California’s Surface Water Ambient Monitoring
Program (SWAMP).8
b. Risk Level 3 dischargers qualifying for bioassessment, where
construction commences out of an index period for the site location
shall:
i. Receive Regional Board approval for the sampling exception.
ii. Conduct bioassessment monitoring, as described in Appendix 3.
iii. Include the collection and reporting of specified instream
biological data and physical habitat.
iv. Use the bioassessment sample collection and Quality
Assurance & Quality Control (QA/QC) protocols developed by
the State of California’s Surface Water Ambient Monitoring
Program (SWAMP).
OR
v. Make a check payable to: Cal State Chico Foundation (SWAMP
Bank Account) or San Jose State Foundation (SWAMP Bank
Account) and include the WDID# on the check for the amount
calculated for the exempted project.
8 http://www.waterboards.ca.gov/water_issues/programs/swamp/.
ATTACHMENT E
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22
vi. Send a copy of the check to the Regional Water Board office for
the site’s region.
vii. Invest $7,500.00 X The number of samples required into the
SWAMP program as compensation (upon regional board
approval).
ATTACHMENT E 2009-0009-DWQ amended by 2010-0014-DWQ & 2012–0006-DWQ 23 Table 3 – Risk Level 3 Test Methods, Detection Limits, Reporting Units and Applicable NALs Parameter Test Method / Protocol Discharge Type Min. Detection Limit Reporting Units Numeric Action Level Numeric Effluent Limitation Receiving Water Monitoring Trigger pH Field test with calibrated portable instrument Risk Level 3 Discharges 0.2 pH units lower NAL = 6.5 upper NAL = 8.5 N/A lower limit = 6.0 upper limit = 9.0 Turbidity EPA 0180.1 and/or field test with calibrated portable instrument Risk Level 3 Discharges other than ATS 1 NTU 250 NTU N/A 500 NTU For ATS discharges 1 NTU N/A 10 NTU for Daily Weighted Average & 20 NTU for Any Single Sample 10 NTU for Daily Weighted Average & 20 NTU for Any Single Sample SSC ASTM Method D 3977-979 Risk Level 3 (if Receiving Water Monitoring Trigger exceeded) 5 mg/L N/A N/A N/A Bioassessment (STE) Level I of (SAFIT),10 fixed-count of 600 org/sample Risk Level 3 projects> 30 acres N/A N/A N/A N/A N/A 9 ASTM, 1999, Standard Test Method for Determining Sediment Concentration in Water Samples: American Society of Testing and Materials, D 3977-97, Vol. 11.02, pp. 389-394. 10 The current SAFIT STEs (28 November 2006) list requirements for both the Level I and Level II taxonomic effort, and are located at: http://www.swrcb.ca.gov/swamp/docs/safit/ste_list.pdf. When new editions are published by SAFIT, they will supersede all previous editions. All editions will be posted at the State Water Board’s SWAMP website.
ATTACHMENT F
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
1
ATTACHMENT F:
Active Treatment System (ATS) Requirements
Table 1 – Numeric Effluent Limitations, Numeric Action Levels, Test Methods,
Detection Limits, and Reporting Units
Parameter Test
Method
Discharge
Type
Min.
Detection
Limit
Units Numeric
Action
Level
Numeric
Effluent
Limitation
Turbidity
EPA
0180.1
and/or field
test with a
calibrated
portable
instrument
For ATS
discharges 1 NTU N/A
10 NTU for
Daily Flow-
Weighted
Average
&
20 NTU for
Any Single
Sample
A. Dischargers choosing to implement an Active Treatment System (ATS) on their site
shall comply with all of the requirements in this Attachment.
B. The discharger shall maintain a paper copy of each ATS specification onsite in
compliance with the record retention requirements in the Special Provisions of this
General Permit.
C. ATS Design, Operation and Submittals
1. The ATS shall be designed and approved by a Certified Professional in Erosion
and Sediment Control (CPESC), a Certified Professional in Storm Water Quality
(CPSWQ); a California registered civil engineer; or any other California
registered engineer.
2. The discharger shall ensure that the ATS is designed in a manner to preclude the
accidental discharge of settled floc1 during floc pumping or related operations.
3. The discharger shall design outlets to dissipate energy from concentrated flows.
4. The discharger shall install and operate an ATS by assigning a lead person (or
project manager) who has either a minimum of five years construction storm
1 Floc is defined as a clump of solids formed by the chemical action in ATS systems.
ATTACHMENT F
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
2
water experience or who is a licensed contractors specifically holding a California
Class A Contractors license.2
5. The discharger shall prepare an ATS Plan that combines the site-specific data
and treatment system information required to safely and efficiently operate an
ATS. The ATS Plan shall be electronically submitted to the State Water Board at
least 14 days prior to the planned operation of the ATS and a paper copy shall be
available onsite during ATS operation. At a minimum, the ATS Plan shall
include:
a. ATS Operation and Maintenance Manual for All Equipment.
b. ATS Monitoring, Sampling & Reporting Plan, including Quality
Assurance/Quality Control (QA/QC).
c. ATS Health and Safety Plan.
d. ATS Spill Prevention Plan.
6. The ATS shall be designed to capture and treat (within a 72-hour period) a
volume equivalent to the runoff from a 10-year, 24-hour storm event using a
watershed runoff coefficient of 1.0.
D. Treatment – Chemical Coagulation/Flocculation
1. Jar tests shall be conducted using water samples selected to represent typical
site conditions and in accordance with ASTM D2035-08 (2003).
2. The discharger shall conduct, at minimum, six site-specific jar tests (per polymer
with one test serving as a control) for each project to determine the proper
polymer and dosage levels for their ATS.
3. Single field jar tests may also be conducted during a project if conditions warrant,
for example if construction activities disturb changing types of soils, which
consequently cause change in storm water and runoff characteristics.
E. Residual Chemical and Toxicity Requirements
1. The discharger shall utilize a residual chemical test method that has a method
detection limit (MDL) of 10% or less than the maximum allowable threshold
2 Business and Professions Code Division 3, Chapter 9, Article 4, Class A Contractor: A general engineering
contractor is a contractor whose principal contracting business is in connection with fixed works requiring specialized
engineering knowledge and skill. [http://www.cslb.ca.gov/General-Information/library/licensing-classifications.asp].
ATTACHMENT F
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
3
concentration3 (MATC) for the specific coagulant in use and for the most
sensitive species of the chemical used.
2. The discharger shall utilize a residual chemical test method that produces a
result within one hour of sampling.
3. The discharger shall have a California State certified laboratory validate the
selected residual chemical test. Specifically the lab will review the test protocol,
test parameters, and the detection limit of the coagulant. The discharger shall
electronically submit this documentation as part of the ATS Plan.
4. If the discharger cannot utilize a residual chemical test method that meets the
requirements above, the discharger shall operate the ATS in Batch Treatment4
mode.
5. A discharger planning to operate in Batch Treatment mode shall perform toxicity
testing in accordance with the following:
a. The discharger shall initiate acute toxicity testing on effluent samples
representing effluent from each batch prior to discharge5. All bioassays shall
be sent to a laboratory certified by the Department of Health Services (DHS)
Environmental Laboratory Accreditation Program (ELAP). The required field
of testing number for Whole Effluent Toxicity (WET) testing is E113.6
b. Acute toxicity tests shall be conducted with the following species and
protocols. The methods to be used in the acute toxicity testing shall be those
outlined for a 96-hour acute test in “Methods for Measuring the Acute Toxicity
of Effluents and Receiving Water to Freshwater and Marine Organisms,
USEPA-841-R-02-012” for Fathead minnow, Pimephales promelas (fathead
minnow). Acute toxicity for Oncorhynchus mykiss (Rainbow Trout) may be
used as a substitute for testing fathead minnows.
c. All toxicity tests shall meet quality assurance criteria and test acceptability
criteria in the most recent versions of the EPA test method for WET testing.
d. The discharger shall electronically report all acute toxicity testing.
3 The Maximum Allowable Threshold Concentration (MATC) is the allowable concentration of residual, or dissolved,
coagulant/flocculant in effluent. The MATC shall be coagulant/flocculant-specific, and based on toxicity testing
conducted by an independent, third-party laboratory. A typical MATC would be:
The MATC is equal to the geometric mean of the NOEC (No Observed Effect Concentration) and LOEC (Lowest
Observed Effect Concentration) Acute and Chronic toxicity results for most sensitive species determined for the
specific coagulant. The most sensitive species test shall be used to determine the MATC. 4 Batch Treatment mode is defined as holding or recirculating the treated water in a holding basin or tank(s) until
treatment is complete or the basin or storage tank(s) is full. 5 This requirement only requires that the test be initiated prior to discharge. 6 http://www.dhs.ca.gov/ps/ls/elap/pdf/FOT_Desc.pdf.
ATTACHMENT F
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4
F. Filtration
1. The ATS shall include a filtration step between the coagulant treatment train and
the effluent discharge. This is commonly provided by sand, bag, or cartridge
filters, which are sized to capture suspended material that might pass through the
clarifier tanks.
2. Differential pressure measurements shall be taken to monitor filter loading and
confirm that the final filter stage is functioning properly.
G. Residuals Management
1. Sediment shall be removed from the storage or treatment cells as necessary to
ensure that the cells maintain their required water storage (i.e., volume)
capability.
2. Handling and disposal of all solids generated during ATS operations shall be
done in accordance with all local, state, and federal laws and regulations.
H. ATS Instrumentation
1. The ATS shall be equipped with instrumentation that automatically measures and
records effluent water quality data and flow rate.
2. The minimum data recorded shall be consistent with the Monitoring and
Reporting requirements below, and shall include:
a. Influent Turbidity
b. Effluent Turbidity
c. Influent pH
d. Effluent pH
e. Residual Chemical
f. Effluent Flow rate
g. Effluent Flow volume
3. Systems shall be equipped with a data recording system, such as data loggers or
webserver-based systems, which records each measurement on a frequency no
longer than once every 15 minutes.
ATTACHMENT F
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
5
4. Cumulative flow volume shall be recorded daily. The data recording system shall
have the capacity to record a minimum of seven days continuous data.
5. Instrumentation systems shall be interfaced with system control to provide auto
shutoff or recirculation in the event that effluent measurements exceed turbidity
or pH.
6. The system shall also assure that upon system upset, power failure, or other
catastrophic event, the ATS will default to a recirculation mode or safe shut
down.
7. Instrumentation (flow meters, probes, valves, streaming current detectors,
controlling computers, etc.) shall be installed and maintained per manufacturer’s
recommendations, which shall be included in the QA/QC plan.
8. The QA/QC plan shall also specify calibration procedures and frequencies,
instrument method detection limit or sensitivity verification, laboratory duplicate
procedures, and other pertinent procedures.
9. The instrumentation system shall include a method for controlling coagulant
dose, to prevent potential overdosing. Available technologies include
flow/turbidity proportional metering, periodic jar testing and metering pump
adjustment, and ionic charge measurement controlling the metering pump.
I. ATS Effluent Discharge
1. ATS effluent shall comply with all provisions and prohibitions in this General
Permit, specifically the NELs.
2. NELs for discharges from an ATS:
a. Turbidity of all ATS discharges shall be less than 10 NTU for daily flow-
weighted average of all samples and 20 NTU for any single sample.
b. Residual Chemical shall be < 10% of MATC7 for the most sensitive species of
the chemical used.
7 The Maximum Allowable Threshold Concentration (MATC) is the allowable concentration of residual, or dissolved,
coagulant/flocculant in effluent. The MATC shall be coagulant/flocculant-specific, and based on toxicity testing
conducted by an independent, third-party laboratory. The MATC is equal to the geometric mean of the NOEC (No
Observed Effect Concentration) and LOEC (Lowest Observed Effect Concentration) Acute and Chronic toxicity
results for most sensitive species determined for the specific coagulant. The most sensitive species test shall be
used to determine the MATC.
ATTACHMENT F
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6
3. If an analytical effluent sampling result exceeds the turbidity NEL (as listed in
Table 1), the discharger is in violation of this General Permit and shall
electronically file the results in violation within 24-hours of obtaining the results.
4. If ATS effluent is authorized to discharge into a sanitary sewer system, the
discharger shall comply with any pre-treatment requirements applicable for that
system. The discharger shall include any specific criteria required by the
municipality in the ATS Plan.
5. Compliance Storm Event:
Discharges of storm water from ATS shall comply with applicable NELs (above)
unless the storm event causing the discharges is determined after the fact to be
equal to or larger than the Compliance Storm Event (expressed in inches of
rainfall). The Compliance Storm Event for ATS discharges is the 10 year, 24
hour storm, as determined using these maps:
http://www.wrcc.dri.edu/pcpnfreq/nca10y24.gif
http://www.wrcc.dri.edu/pcpnfreq/sca10y24.gif
This exemption is dependent on the submission of rain gauge data verifying the
storm event is equal to or larger than the Compliance Storm.
J. Operation and Maintenance Plan
1. Each Project shall have a site-specific Operation and Maintenance (O&M)
Manual covering the procedures required to install, operate and maintain the
ATS.8
2. The O&M Manual shall only be used in conjunction with appropriate project-
specific design specifications that describe the system configuration and
operating parameters.
3. The O&M Manual shall have operating manuals for specific pumps, generators,
control systems,and other equipment.
K. Sampling and Reporting Quality Assurance/ Quality Check (QA/QC) Plan
4. A project-specific QA/QC Plan shall be developed for each project. The QA/QC
Plan shall include at a minimum:
a. Calibration – Calibration methods and frequencies for all system and field
instruments shall be specified.
8 The manual is typically in a modular format covering generalized procedures for each component that is utilized in a
particular system.
ATTACHMENT F
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7
b. Method Detection Limits (MDLs) – The methods for determining MDLs shall
be specified for each residual coagulant measurement method. Acceptable
minimum MDLs for each method, specific to individual coagulants, shall be
specified.
c. Laboratory Duplicates – Requirements for monthly laboratory duplicates for
residual coagulant analysis shall be specified.
L. Personnel Training
1. Operators shall have training specific to using an ATS and liquid coagulants for
storm water discharges in California.
2. The training shall be in the form of a formal class with a certificate and
requirements for testing and certificate renewal.
3. Training shall include a minimum of eight hours classroom and 32 hours field
training. The course shall cover the following topics:
a. Coagulation Basics –Chemistry and physical processes
b. ATS System Design and Operating Principles
c. ATS Control Systems
d. Coagulant Selection – Jar testing, dose determination, etc.
e. Aquatic Safety/Toxicity of Coagulants, proper handling and safety
f. Monitoring, Sampling, and Analysis
g. Reporting and Recordkeeping
h. Emergency Response
M. Active Treatment System (ATS) Monitoring Requirements
Any discharger who deploys an ATS on their site shall conduct the following:
1. Visual Monitoring
a. A designated responsible person shall be on site daily at all times during
treatment operations.
ATTACHMENT F
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
8
b. Daily on-site visual monitoring of the system for proper performance shall be
conducted and recorded in the project data log.
i. The log shall include the name and phone number of the person
responsible for system operation and monitoring.
ii. The log shall include documentation of the responsible person’s training.
2. Operational and Compliance Monitoring
a. Flow shall be continuously monitored and recorded at not greater than 15-
minute intervals for total volume treated and discharged.
b. Influent and effluent pH must be continuously monitored and recorded at not
greater than 15-minute intervals.
c. Influent and effluent turbidity (expressed in NTU) must be continuously
monitored and recorded at not greater than 15-minute intervals.
d. The type and amount of chemical used for pH adjustment, if any, shall be
monitored and recorded.
e. Dose rate of chemical used in the ATS system (expressed in mg/L) shall be
monitored and reported 15-minutes after startup and every 8 hours of
operation.
f. Laboratory duplicates – monthly laboratory duplicates for residual coagulant
analysis must be performed and records shall be maintained onsite.
g. Effluent shall be monitored and recorded for residual chemical/additive levels.
h. If a residual chemical/additive test does not exist and the ATS is operating in
a batch treatment mode of operation refer to the toxicity monitoring
requirements below.
3. Toxicity Monitoring
A discharger operating in batch treatment mode shall perform toxicity testing in
accordance with the following:
a. The discharger shall initiate acute toxicity testing on effluent samples
representing effluent from each batch prior to discharge.9 All bioassays shall
be sent to a laboratory certified by the Department of Health Services (DHS)
9 This requirement only requires that the test be initiated prior to discharge.
ATTACHMENT F
2009-0009-DWQ amended by 2010-0014-DWQ & 2012–2006-DWQ
9
Environmental Laboratory Accreditation Program (ELAP). The required field
of testing number for Whole Effluent Toxicity (WET) testing is E113.10
b. Acute toxicity tests shall be conducted with the following species and
protocols. The methods to be used in the acute toxicity testing shall be those
outlined for a 96-hour acute test in “Methods for Measuring the Acute Toxicity
of Effluents and Receiving Water to Freshwater and Marine Organisms,
USEPA-841-R-02-012” for Fathead minnow, Pimephales promelas or
Rainbow trout Oncorhynchus mykiss may be used as a substitute for fathead
minnow.
c. All toxicity tests shall meet quality assurance criteria and test acceptability
criteria in the most recent versions of the EPA test method for WET testing.11
4. Reporting and Recordkeeping
At a minimum, every 30 days a LRP representing the discharger shall access the
State Water Boards Storm Water Mulit-Application and Report Tracking system
(SMARTS) and electronically upload field data from the ATS. Records must be
kept for three years after the project is completed .
5. Non-compliance Reporting
a. Any indications of toxicity or other violations of water quality objectives shall
be reported to the appropriate regulatory agency as required by this General
Permit.
b. Upon any measurements that exceed water quality standards, the system
operator shall immediately notify his supervisor or other responsible parties,
who shall notify the Regional Water Board.
c. If any monitoring data exceeds any applicable NEL in this General Permit, the
discharger shall electronically submit a NEL Violation Report to the State
Water Board within 24 hours after the NEL exceedance has been identified.
i. ATS dischargers shall certify each NEL Violation Report in accordance
with the Special Provisions for Construction Activity in this General Permit.
ii. ATS dischargers shall retain an electronic or paper copy of each NEL
Violation Report for a minimum of three years after the date the annual
report is filed.
iii. ATS dischargers shall include in the NEL Violation Report:
10 http://www.dhs.ca.gov/ps/ls/elap/pdf/FOT_Desc.pdf. 11 http://www.epa.gov/waterscience/methods/wet/.
ATTACHMENT F
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10
(1) The analytical method(s), method reporting unit(s), and method
detection limit(s) of each analytical parameter (analytical results
that are less than the method detection limit shall be reported as
“less than the method detection limit”);
(2) The date, place, time of sampling, visual observation (inspections),
and/or measurements, including precipitation; and
(3) A description of the current onsite BMPs, and the proposed
corrective actions taken to manage the NEL exceedance.
iv. Compliance Storm Exemption - In the event that an applicable NEL has
been exceeded during a storm event equal to or larger than the
Compliance Storm Event, ATS dischargers shall report the on-site rain
gauge reading and nearby governmental rain gauge readings for
verification.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
AB C D E F G H I J K L M
Version 8/17/2011
Risk Determination Worksheet
Step 1 Determine Sediment Risk via one of the options listed:
1. GIS Map Method - EPA Rainfall Erosivity Calculator & GIS map
2. Individual Method - EPA Rainfall Erosivity Calculator & Individual Data
Step 2 Determine Receiving Water Risk via one of the options listed:
1. GIS map of Sediment Sensitive Watersheds provided
2. Site Specific Analysis (support documentation required)
Step 3 Determine Combined Risk Level
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
ABC
Entry
0
0
0
Watershed Erosion Estimate (=RxKxLS) in tons/acre
Site Sediment Risk Factor
Low Sediment Risk: < 15 tons/acre
Medium Sediment Risk: >=15 and <75 tons/acre
High Sediment Risk: >= 75 tons/acre
GIS Map Method:
1. The R factor for the project is calculated using the online calculator at:
http://cfpub.epa.gov/npdes/stormwater/LEW/lewCalculator.cfm
2. The K and LS factors may be obtained by accessing the GIS maps located on the State Water
Board FTP website at:
ftp://swrcb2a.waterboards.ca.gov/pub/swrcb/dwq/cgp/Risk/
Sediment Risk Factor Worksheet
A) R Factor
R Factor Value
B) K Factor (weighted average, by area, for all site soils)
Analyses of data indicated that when factors other than rainfall are held constant, soil loss is directly proportional to a
rainfall factor composed of total storm kinetic energy (E) times the maximum 30-min intensity (I30) (Wischmeier and
Smith, 1958). The numerical value of R is the average annual sum of EI30 for storm events during a rainfall record of at
least 22 years. "Isoerodent" maps were developed based on R values calculated for more than 1000 locations in the
Western U.S. Refer to the link below to determine the R factor for the project site.
http://cfpub.epa.gov/npdes/stormwater/LEW/lewCalculator.cfm
K Factor Value
LS Factor Value
Low
C) LS Factor (weighted average, by area, for all slopes)
The soil-erodibility factor K represents: (1) susceptibility of soil or surface material to erosion, (2) transportability of the
sediment, and (3) the amount and rate of runoff given a particular rainfall input, as measured under a standard condition.
Fine-textured soils that are high in clay have low K values (about 0.05 to 0.15) because the particles are resistant to
detachment. Coarse-textured soils, such as sandy soils, also have low K values (about 0.05 to 0.2) because of high
infiltration resulting in low runoff even though these particles are easily detached. Medium-textured soils, such as a silt
loam, have moderate K values (about 0.25 to 0.45) because they are moderately susceptible to particle detachment and
they produce runoff at moderate rates. Soils having a high silt content are especially susceptible to erosion and have high
K values, which can exceed 0.45 and can be as large as 0.65. Silt-size particles are easily detached and tend to crust,
producing high rates and large volumes of runoff. Use Site-specific data must be submitted.
The effect of topography on erosion is accounted for by the LS factor, which combines the effects of a hillslope-length
factor, L, and a hillslope-gradient factor, S. Generally speaking, as hillslope length and/or hillslope gradient increase, soil
loss increases. As hillslope length increases, total soil loss and soil loss per unit area increase due to the progressive
accumulation of runoff in the downslope direction. As the hillslope gradient increases, the velocity and erosivity of runoff
increases. Use the LS table located in separate tab of this spreadsheet to determine LS factors. Estimate the weighted
LS for the site prior to construction.
0
Site-specific K factor guidance
LS Table
Receiving Water (RW) Risk Factor Worksheet Entry Score
A. Watershed Characteristics yes/no
A.1. Does the disturbed area discharge (either directly or indirectly) to a303(d)-listed
waterbody impaired by sediment (For help with impaired waterbodies please visit the link
below) or has a USEPA approved TMDL implementation plan for sediment?:
http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2010.shtml
OR
A.2. Does the disturbed area discharge to a waterbody with designated beneficial uses of
SPAWN & COLD & MIGRATORY? (For help please review the appropriate Regional Board
Basin Plan)
http://www.waterboards.ca.gov/waterboards_map.shtml
Region 1 Basin Plan
Region 2 Basin Plan
Region 3 Basin Plan
Region 4 Basin Plan
Region 5 Basin Plan
Region 6 Basin Plan
Region 7 Basin Plan
Region 8 Basin Plan
Region 9 Basin Plan
no Low
Low Medium High
Low Level 1
High Level 3
Project Sediment Risk:Low 1
Project RW Risk:Low 1
Project Combined Risk:Level 1
Combined Risk Level Matrix
Sediment Risk
Receiving Water RiskLevel 2
Level 2
Average Watershed Slope (%)Sheet
Flow
Length
(ft)0.2 0.5 1.0 2.0 3.0 4.0 5.0 6.0 8.0 10.0 12.0 14.0 16.0 20.0 25.0 30.0 40.0 50.0 60.0
<3 0.05 0.07 0.09 0.13 0.17 0.20 0.23 0.26 0.32 0.35 0.36 0.38 0.39 0.41 0.45 0.48 0.53 0.58 0.63
6 0.05 0.07 0.09 0.13 0.17 0.20 0.23 0.26 0.32 0.37 0.41 0.45 0.49 0.56 0.64 0.72 0.85 0.97 1.07
9 0.05 0.07 0.09 0.13 0.17 0.20 0.23 0.26 0.32 0.38 0.45 0.51 0.56 0.67 0.80 0.91 1.13 1.31 1.47
12 0.05 0.07 0.09 0.13 0.17 0.20 0.23 0.26 0.32 0.39 0.47 0.55 0.62 0.76 0.93 1.08 1.37 1.62 1.84
15 0.05 0.07 0.09 0.13 0.17 0.20 0.23 0.26 0.32 0.40 0.49 0.58 0.67 0.84 1.04 1.24 1.59 1.91 2.19
25 0.05 0.07 0.10 0.16 0.21 0.26 0.31 0.36 0.45 0.57 0.71 0.85 0.98 1.24 1.56 1.86 2.41 2.91 3.36
50 0.05 0.08 0.13 0.21 0.30 0.38 0.46 0.54 0.70 0.91 1.15 1.40 1.64 2.10 2.67 3.22 4.24 5.16 5.97
75 0.05 0.08 0.14 0.25 0.36 0.47 0.58 0.69 0.91 1.20 1.54 1.87 2.21 2.86 3.67 4.44 5.89 7.20 8.37
100 0.05 0.09 0.15 0.28 0.41 0.55 0.68 0.82 1.10 1.46 1.88 2.31 2.73 3.57 4.59 5.58 7.44 9.13 10.63
150 0.05 0.09 0.17 0.33 0.50 0.68 0.86 1.05 1.43 1.92 2.51 3.09 3.68 4.85 6.30 7.70 10.35 12.75 14.89
200 0.06 0.10 0.18 0.37 0.57 0.79 1.02 1.25 1.72 2.34 3.07 3.81 4.56 6.04 7.88 9.67 13.07 16.16 18.92
250 0.06 0.10 0.19 0.40 0.64 0.89 1.16 1.43 1.99 2.72 3.60 4.48 5.37 7.16 9.38 11.55 15.67 19.42 22.78
300 0.06 0.10 0.20 0.43 0.69 0.98 1.28 1.60 2.24 3.09 4.09 5.11 6.15 8.23 10.81 13.35 18.17 22.57 26.51
400 0.06 0.11 0.22 0.48 0.80 1.14 1.51 1.90 2.70 3.75 5.01 6.30 7.60 10.24 13.53 16.77 22.95 28.60 33.67
600 0.06 0.12 0.24 0.56 0.96 1.42 1.91 2.43 3.52 4.95 6.67 8.45 10.26 13.94 18.57 23.14 31.89 39.95 47.18
800 0.06 0.12 0.26 0.63 1.10 1.65 2.25 2.89 4.24 6.03 8.17 10.40 12.69 17.35 23.24 29.07 40.29 50.63 59.93
1000 0.06 0.13 0.27 0.69 1.23 1.86 2.55 3.30 4.91 7.02 9.57 12.23 14.96 20.57 27.66 34.71 48.29 60.84 72.15
LS Factors for Construction Sites. Table from Renard et. al., 1997.
APPENDIX 2
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
1
APPENDIX 2:
Post-Construction Water Balance Performance Standard
Spreadsheet
The discharger shall submit with their Notice of Intent (NOI) the following
information to demonstrate compliance with the New and Re-Development Water
Balance Performance Standard.
Map Instructions
The discharger must submit a small-scale topographic map of the site to show
the existing contour elevations, pre- and post-construction drainage divides, and
the total length of stream in each watershed area. Recommended scales include
1 in. = 20 ft., 1 in. = 30 ft., 1 in. = 40 ft., or 1 in = 50 ft. The suggested contour
interval is usually 1 to 5 feet, depending upon the slope of the terrain. The
contour interval may be increased on steep slopes. Other contour intervals and
scales may be appropriate given the magnitude of land disturbance.
Spreadsheet Instructions
The intent of the spreadsheet is to help dischargers calculate the project-related
increase in runoff volume and select impervious area and runoff reduction credits
to reduce the project-related increase in runoff volume to pre-project levels.
The discharger has the option of using the spreadsheet (Appendix 2.1) or a
more sophisticated, watershed process-based model (e.g. Storm Water
Management Model, Hydrological Simulation Program Fortran) to determine the
project-related increase in runoff volume.
In Appendix 4.1, you must complete the worksheet for each land use/soil
type combination for each project sub-watershed.
Steps 1 through 9 pertain specifically to the Runoff Volume Calculator:
Step 1: Enter the county where the project is located in cell H3.
Step 2: Enter the soil type in cell H6.
Step 3: Enter the existing pervious (dominant) land use type in cell H7.
Step 4: Enter the proposed pervious (dominant) land use type in cell H8.
Step 5: Enter the total project site area in cell H11 or J11.
Step 6: Enter the sub-watershed area in cell H12 or J12.
APPENDIX 2
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
2
Step 7: Enter the existing rooftop area in cell H17 or J17, the existing non-
rooftop impervious area in cell H18 or J18, the proposed rooftop area in
cell H19 or J19, and the proposed non-rooftop impervious area in cell
H20 or J20
Step 8: Work through each of the impervious area reduction credits and claim
credits where applicable. Volume that cannot be addressed using non-
structural practices must be captured in structural practices and
approved by the Regional Water Board.
Step 9: Work through each of the impervious volume reduction credits and
claim credits where applicable. Volume that cannot be addressed
using non-structural practices must be captured in structural practices
and approved by the Regional Water Board.
Non-structural Practices Available for Crediting
• Porous Pavement
• Tree Planting
• Downspout Disconnection
• Impervious Area Disconnection
• Green Roof
• Stream Buffer
• Vegetated Swales
• Rain Barrels and Cisterns
• Landscaping Soil Quality
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
AB C D E F G H I J K L M N
(Step 1a) If you know the 85th percentile storm event for your location enter it in the box below
(Step 1b) If you can not answer 1a then
select the county where the project is
located (click on the cell to the right for drop-down): This will determine the average 85th percentile 24 hr. storm event for your site, which will appear under
precipitation to left.
(Step 1c) If you would like a more percise
value select the location closest to your
site. If you do not recgonize any of these
locations, leave this drop-down menu at location. The average value for the County will be used.
Project Name:(Step 2) Indicate the Soil Type (dropdown menu to right):
Waste Discharge Identification
(WDID):
(Step 3) Indicate the existing dominant
non-built land Use Type (dropdown menu
to right):
Date:(Step 4) Indicate the proposed dominant non-built land Use Type (dropdown menu
to right):
Sub Drainage Area Name (from map):Acres
82 (Step 5) Total Project Site Area:5.00
74 (Step 6) Sub-watershed Area:5.00
Percent of total project :Based on the County you indicated
above, we have included the 85
percentile average 24 hr event - P85 (in)^ for your area.
in
The Amount of rainfall needed for
runoff to occur (Existing runoff curve
number -P from existing RCN (in)^)
In
(Step 7) Sub-watershed Conditions
P used for calculations (in) (the greater of the above two criteria)In Sub-watershed Area (acres)Acres
^Available at www.cabmphandbooks.com Existing Rooftop Impervious Coverage 0
Existing Non-Rooftop Impervious Coverage 0
Proposed Rooftop Impervious Coverage 0
Proposed Non-Rooftop Impervious
Coverage 0
(p)p
Credits
Porous Pavement
Tree Planting
Pre-Project Runoff Volume (cu ft) Cu.Ft.Downspout Disconnection
Project-Related Runoff Volume
Increase w/o credits (cu ft)Cu.Ft.
Impervious Area DisconnectionGreen Roof
Stream Buffer
Vegetated Swales
Subtotal
Subtotal Runoff Volume Reduction Credit
(Step 9) Impervious Volume Reduction Credits
Rain Barrels/Cisterns
Soil Quality Cu. Ft.
Subtotal Runoff Volume Reduction
Total Runoff Volume Reduction Credit
247
Proposed Development Pervious Runoff Curve Number
0.62
0.62
Optional
Runoff Curve Numbers
Complete Either
Lawn, Grass, or Pasture covering more than 75% of the open space
Existing Pervious Runoff Curve Number
Complete EitherOptional
Optional
Calculated Acres
Optional
You have achieved your minimum requirements
Project-Related Volume Increase
with Credits (cu ft)0
Design Storm
0
0.44
0
Post-Construction Water Balance Calculator
100%
Acres
5.00
5.00
Wood & Grass: <50% ground cover
User may make changes from any cell
that is orange or brown in color (similar to the cells to the immediate right). Cells in green are calculated for you.
Project Information
SACRAMENTO
0.00
Cu. Ft.
Cu.Ft.
Cu. Ft.
0
0
0
00.00
0
0
0.00
0.00
Cu. Ft.
Volume (cubic feet)
0.00
0.00
0.00
0
0.00
0
0.00
Square FeetAcres
0
SACRAMENTO FAA ARPT
Low infiltration. Sandy clay loam.
Infiltration rate 0.05 to 0.15 inch/hr
when wet.
Runoff Calculations
5.00Sq Ft
Sq Ft
Group C
Soils
Cu. Ft.
0.00
0.00
0.00 0
0
0
Porous Pavement Credit Worksheet
Please fill out a porous pavement credit worksheet for each project sub-watershed.
For the PROPOSED Development:
Proposed Porous Pavement Runoff Reduction*In SqFt.In Acres Equivalent Acres
Area of Brick without Grout on less than 12 inches of base with at least 20% void
space over soil 0.45 0.00
Area of Brick without Grout on more than 12 inches of base with at least 20% void
space over soil 0.90 0.00Area of Cobbles less than 12 inches deep and over soil 0.30 0.00
Area of Cobbles less than 12 inches deep and over soil 0.60 0.00
Area of Reinforced Grass Pavement on less than 12 inches of base with at least 20%
void space over soil 0.45 0.00
Area of Reinforced Grass Pavement on at least 12 inches of base with at least 20%
void space over soil 0.90 0.00
Area of Porous Gravel Pavement on less than 12 inches of base with at least 20%
void space over soil 0.38 0.00
Area of Porous Gravel Pavement on at least 12 inches of base with at least 20% void space over soil 0.75 0.00
Area of Poured Porous Concrete or Asphalt Pavement with less than 4 inches of
gravel base (washed stone) 0.40 0.00
Area of Poured Porous Concrete or Asphalt Pavement with 4 to 8 inches of gravel
base (washed stone) 0.60 0.00
Area of Poured Porous Concrete or Asphalt Pavement with 8 to 12 inches of gravel
base (washed stone) 0.80 0.00
Area of Poured Porous Concrete or Asphalt Pavement with 12 or more inches of
gravel base (washed stone) 1.00 0.00
*=1-Rv**Return to Calculator
**Using Site Design Techniques to meet Development Standards for Stormwater Quality (BASMAA 2003)**NCDENR Stormwater BMP Manual (2007)
Fill in either Acres or SqFt
Tree Planting Credit Worksheet
Tree Canopy Credit Criteria
Number of Trees
Planted Credit (acres)
0 0.00
0.00
Square feet Under
Canopy
0.00
0.00 0
Return to Calculator
* credit amount based on credits from Stormwater Quality Design Manual for the Sacramento and South Placer Regions
Please fill out a tree canopy credit worksheet for each project sub-watershed.
Number of proposed evergreen trees to be planted (credit = number of trees x 0.005)*
Number of proposed deciduous trees to be planted (credit = number of trees x 0.0025)*
Square feet under an existing tree canopy, that will remain on the property, with an average
diameter at 4.5 ft above grade (i.e., diameter at breast height or DBH) is LESS than 12 in
diameter.
Please describe below how the project will ensure that these trees will be maintained.
Square feet under an existing tree canopy that will remain on the property, with an average
diameter at 4.5 ft above grade (i.e., diameter at breast height or DBH) is 12 in diameter or
GREATER.
Downspout Disconnection Credit Worksheet
Percentage of existing 0.00 Acres
The Stream Buffer and/or Vegetated Swale credits will not be taken in this sub-watershed area?
Please fill out a downspout disconnection credit worksheet for each project subwatershed. If you
answer yes to all questions, all rooftop area draining to each downspout will be subtracted from
your proposed rooftop impervious coverage.
Is the roof runoff from the design storm event fully contained in a raised bed or planter box or does
it drain as sheet flow to a landscaped area large enough to contain the roof runoff from the design
storm event?
Downspout Disconnection Credit Criteria
Do downspouts and any extensions extend at least six feet from a basement and two feet from a
crawl space or concrete slab?
Is the area of rooftop connecting to each disconnected downspout 600 square feet or less?
of rooftop surface has disconnected
downspouts
of rooftop surface has disconnected 50
Yes
Yes
Yes
No
No
No
Yes No
Percentage of the proposed 0.00 Acres
p
downspouts 50
Return to Calculator
Yes
Yes
Yes
No
No
No
Yes No
Impervious Area Disconnection Credit Worksheet
Response
Percentage of existing 0.00 AcresPercentage of the
proposed 0.00 Acres 70
Return to Calculator
The Stream Buffer credit will not be taken in this sub-watershed area?
non-rooftop surface area disconnected
non-rooftop surface area disconnected
Please fill out an impervious area disconnection credit worksheet for each project sub-watershed. If you answer
yes to all questions, all non-rooftop impervious surface area will be subtracted from your proposed non-rooftop
impervious coverage.
Non-Rooftop Disconnection Credit Criteria
Is the maximum contributing impervious flow path length less than 75 feet or, if equal or
greater than 75 feet, is a storage device (e.g. French drain, bioretention area, gravel
trench) implemented to achieve the required disconnection length?
Is the impervious area to any one discharge location less than 5,000 square feet?
Yes No
Yes No
Yes No
Green Roof Credit Worksheet
Please fill out a greenroof credit worksheet for each project sub-watershed. If you answer yes to all
questions, 70% of the greenroof area will be subtracted from your proposed rooftop impervious coverage.
Green Roof Credit Criteria
Response
Is the roof slope less than 15% or does it have a grid to hold the substrate in
place until it forms a thick vegetation mat?
Has a professional engineer assessed the necessary load reserves and
designed a roof structure to meet state and local codes?
Is the irrigation needed for plant establishment and/or to sustain the green roof
during extended dry periods, is the source from stored, recycled, reclaimed, or
reused water?
Percentage of
existing
0.0
0 Acres rooftop surface area in greenroof
Percentage of the
proposed
0.0
0 Acres rooftop surface area in greenroof
Return to Calculator
Stream Buffer Credit Worksheet
Please fill out a stream buffer credit worksheet for each project sub-watershed. If you answer yes to all
questions, you may subtract all impervious surface draining to each stream buffer that has not been
addressed using the Downspout and/or Impervious Area Disconnection credits.
Stream Buffer Credit Criteria
Response
Does runoff enter the floodprone width* or within 500 feet (whichever is
larger) of a stream channel as sheet flow**?
Is the contributing overland slope 5% or less, or if greater than 5%, is a
level spreader used?
Is the buffer area protected from vehicle or other traffic barriers to reduce
compaction?
Will the stream buffer be maintained in an ungraded and uncompacted
condition and will the vegetation be maintained in a natural condition?
Percentage of
existing 0.00 Acres
impervious surface area draining
into a stream buffer:
Percentage of the
proposed 0.00 Acres
impervious surface area that will
drain into a stream buffer:
Please describe below how the project will ensure that the buffer areas
will remain in ungraded and uncompacted condition and that the
vegetation will be maintained in a natural condition.
Return to Calculator
* floodprone width is the width at twice the bankfull depth.
** the maximum contributing length shall be 75 feet for impervious area
Vegetated Swale Credit Worksheet
Percentage of existing 0.00 Acres
Percentage of the proposed 0.00 Acres
Return to Calculator
Please fill out a vegetated swale worksheet for each project subwatershed. If you answer yes to all
questions, you may subtract all impervious surface draining to each stream buffer that has not been
addressed using the Downspout Disconnection credit.
Vegetated Swale Credit Criteria
Have all vegetated swales been designed in accordance with Treatment Control BMP 30 (TC-30 -
Vegetated Swale) from the California Stormwater BMP Handbook, New Development and
Redevelopment (available at www.cabmphandbooks.com)?
Is the maximum flow velocity for runoff from the design storm event less than or equal to 1.0 foot
per second?
of impervious area draining to a vegetated swale
of impervious area draining to a vegetated swale
Yes No
Yes No
Rain Barrel/Cistern Credit Worksheet
Rain Barrel/Cistern Credit Criteria Response
Total number of rain barrel(s)/cisterns
Average capacity of rain barrel(s)/cistern(s) (in gallons)
Total capacity rain barrel(s)/cistern(s) (in cu ft) 1 0
1 accounts for 10% loss Return to Calculator
Please fill out a rain barrel/cistern worksheet for each project sub-watershed.
Response
1.3
Sandy loams, loams
12
2.97
Return to Calculator
Table 1
Sands, loamy sands <1 6 Porosity (%)50 94%
Will the landscaped area be lined with an impervious membrane?
What is the average depth of your landscaped soil media meeting the above criteria (inches)?
What is the total area of the landscaped areas meeting the above criteria (in acres)?
Please fill out a soil quality worksheet for each project sub-watershed.
Will the soils used for landscaping meet the ideal bulk densities listed in Table 1 below?1
If you answered yes to the question above, but you do not know the exact bulk density, which
of the soil types in the drop down menu to the right best describes the top 12 inches for soils
used for landscaping (in g/cm3).
If you answered yes to the question above, and you know the area-weighted bulk density
within the top 12 inches for soils used for landscaping (in g/cm 3)* , fill in the cell to the right and
skip to cell G11. If not select from the drop-down menu in G10.
Yes No
Sands, loamy sands <1.6 Porosity (%) 50.94%
Sandy loams, loams <1.4
Sandy clay loams, loams, clay loams <1.4
Silts, silt loams <1.3
Silt loams, silty clay loams <1.1
Sandy clays, silty clays, some clay
loams (35-45% clay)<1.1
Clays (>45% clay)<1.1
http://soils.usda.gov/sqi/management/files/sq_utn_2.pdf
* To determine how to calculate density see:
http://www.globe.gov/tctg/bulkden.pdf?sectionID=94
1 USDA NRCS. "Soil Quality Urban Technical Note
No.2-Urban Soil Compaction". March 2000.
Mineral grains in many soils are mainly quartz and
feldspar, so 2.65 a good average for particle
density. To determine percent porosity, use the
formula: Porosity (%) = (1-Bulk Density/2.65) X
100
Yes No
APPENDIX 3
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
1
APPENDIX 3
Bioassessment Monitoring Guidelines
Bioassessment monitoring is required for projects that meet all of the following
criteria:
1. The project is rated Risk Level 3 or LUP Type 3
2. The project directly discharges runoff to a freshwater wadeable stream (or
streams) that is either: (a) listed by the State Water Board or USEPA as
impaired due to sediment, and/or (b) tributary to any downstream water
body that is listed for sediment; and/or have the beneficial use SPAWN &
COLD & MIGRATORY
3. Total project-related ground disturbance exceeds 30 acres.
For all such projects, the discharger shall conduct bioassessment monitoring, as
described in this section, to assess the effect of the project on the biological
integrity of receiving waters.
Bioassessment shall include:
1. The collection and reporting of specified instream biological data
2. The collection and reporting of specified instream physical habitat data
Bioassessment Exception
If a site qualifies for bioassessment, but construction commences out of an index
period for the site location, the discharger shall:
1. Receive Regional Water Board approval for the sampling exception
2. Make a check payable to: Cal State Chico Foundation (SWAMP Bank
Account) or San Jose State Foundation (SWAMP Bank Account) and
include the WDID# on the check for the amount calculated for the
exempted project.
3. Send a copy of the check to the Regional Water Board office for the site’s
region
4. Invest 7,500.00 X The number of samples required into the SWAMP
program as compensation (upon Regional Water Board approval).
5. Conduct bioassessment monitoring, as described in Appendix 4
6. Include the collection and reporting of specified instream biological data
and physical habitat
7. Use the bioassessment sample collection and Quality Assurance &
Quality Control (QA/QC) protocols developed by the State of California’s
Surface Water Ambient Monitoring Program (SWAMP)
Site Locations and Frequency
Macroinvertebrate samples shall be collected both before ground disturbance is
initiated and after the project is completed. The “after” sample(s) shall be
collected after at least one winter season resulting in surface runoff has
transpired after project-related ground disturbance has ceased. “Before” and
“after” samples shall be collected both upstream and downstream of the project’s
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
2
discharge. Upstream samples should be taken immediately before the sites
outfall and downstream samples should be taken immediately after the outfall
(when safe to collect the samples). Samples should be collected for each
freshwater wadeable stream that is listed as impaired due to sediment, or
tributary to a water body that is listed for sediment. Habitat assessment data shall
be collected concurrently with all required macroinvertebrate samples.
Index Period (Timing of Sample Collection)
Macroinvertebrate sampling shall be conducted during the time of year (i.e., the
“index period”) most appropriate for bioassessment sampling, depending on
ecoregion. This map is posted on the State Water Board’s Website:
http://www.waterboards.ca.gov/water_issues/programs/stormwater/construction.s
html
Field Methods for Macroinvertebrate Collections
In collecting macroinvertebrate samples, the discharger shall use the “Reachwide
Benthos (Multi-habitat) Procedure” specified in Standard Operating Procedures
for Collecting Benthic Macroinvertebrate Samples and Associated Physical and
Chemical Data for Ambient Bioassessments in California (Ode 2007).1
Physical - Habitat Assessment Methods
The discharger shall conduct, concurrently with all required macroinvertebrate
collections, the “Full” suite of physical habitat characterization measurements as
specified in Standard Operating Procedures for Collecting Benthic
Macroinvertebrate Samples and Associated Physical and Chemical Data for
Ambient Bioassessments in California (Ode 2007), and as summarized in the
Surface Water Ambient Monitoring Program’s Stream Habitat Characterization
Form — Full Version.
Laboratory Methods
Macroinvertebrates shall be identified and classified according to the Standard
Taxonomic Effort (STE) Level I of the Southwestern Association of Freshwater
Invertebrate Taxonomists (SAFIT),2 and using a fixed-count of 600 organisms per
sample.
Quality Assurance
The discharger or its consultant(s) shall have and follow a quality assurance (QA)
plan that covers the required bioassessment monitoring. The QA plan shall
include, or be supplemented to include, a specific requirement for external QA
checks (i.e., verification of taxonomic identifications and correction of data where
1 This document is available on the Internet at: http://www.swrcb.ca.gov/swamp/docs/phab_sopr6.pdf.
http://swamp.mpsl.mlml.calstate.edu/wp-
content/uploads/2009/04/swamp_sop_bioassessment_collection_020107.pdf. 2 The current SAFIT STEs (28 November 2006) list requirements for both the Level I and Level II taxonomic
effort, and are located at: http://www.swrcb.ca.gov/swamp/docs/safit/ste_list.pdf
http://www.safit.org/Docs/ste_list.pdf. When new editions are published by SAFIT, they will supersede all
previous editions. All editions will be posted at the State Water Board’s SWAMP website.
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
3
errors are identified). External QA checks shall be performed on one of the
discharger’s macroinvertebrate samples collected per calendar year, or ten
percent of the samples per year (whichever is greater). QA samples shall be
randomly selected. The external QA checks shall be paid for by the discharger,
and performed by the California Department of Fish and Game’s Aquatic
Bioassessment Laboratory. An alternate laboratory with equivalent or better
expertise and performance may be used if approved in writing by State Water
Board staff.
Sample Preservation and Archiving
The original sample material shall be stored in 70 percent ethanol and retained
by the discharger until: 1) all QA analyses specified herein and in the relevant QA
plan are completed; and 2) any data corrections and/or re-analyses
recommended by the external QA laboratory have been implemented. The
remaining subsampled material shall be stored in 70 percent ethanol and
retained until completeness checks have been performed according to the
relevant QA plan. The identified organisms shall be stored in 70 percent ethanol,
in separate glass vials for each final ID taxon. (For example, a sample with 45
identified taxa would be archived in a minimum of 45 vials, each containing all
individuals of the identified taxon.) Each of the vials containing identified
organisms shall be labeled with taxonomic information (i.e., taxon name,
organism count) and collection information (i.e., site name/site code, waterbody
name, date collected, method of collection). The identified organisms shall be
archived (i.e., retained) by the discharger for a period of not less than three years
from the date that all QA steps are completed, and shall be checked at least
once per year and “topped off” with ethanol to prevent desiccation. The identified
organisms shall be relinquished to the State Water Board upon request by any
State Water Board staff.
Data Submittal
The macroinvertebrate results (i.e., taxonomic identifications consistent with the
specified SAFIT STEs, and number of organisms within each taxa) shall be
submitted to the State Water Board in electronic format. The State Water Board’s
Surface Water Ambient Monitoring Program (SWAMP) is currently developing
standardized formats for reporting bioassessment data. All bioassessment data
collected after those formats become available shall be submitted using the
SWAMP formats. Until those formats are available, the biological data shall be
submitted in MS-Excel (or equivalent) format.3
The physical/habitat data shall be reported using the standard format titled
SWAMP Stream Habitat Characterization Form — Full Version.4
3 Any version of Excel, 2000 or later, may be used. 4 Available at:
http://www.waterboards.ca.gov/water_issues/programs/swamp/docs/reports/fieldforms_fullversion052908.pd
f
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
4
Invasive Species Prevention
In conducting the required bioassessment monitoring, the discharger and its
consultants shall take precautions to prevent the introduction or spread of aquatic
invasive species. At minimum, the discharger and its consultants shall follow the
recommendations of the California Department of Fish and Game to minimize the
introduction or spread of the New Zealand mudsnail.5
5 Instructions for controlling the spread of NZ mudsnails, including decontamination methods, can be found
at: http://www.dfg.ca.gov/invasives/mudsnail/
More information on AIS More information on AIS
http://www.waterboards.ca.gov/water_issues/programs/swamp/ais/
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 1 Appendix 4 Non Sediment TMDLs Region 1 Lost River-DIN and CBOD Region 1 Source: Cal Trans Construction TMDL Completion Date: 12 30 2008 TMDL Type: River, Lake Watershed Area= 2996 mi2 Pollutant Stressors/WLA Dissolved inorganic nitrogen (DIN) (metric tons/yr) Carbonaceous biochemical oxygen demand (CBOD) (metric tons/yr) Lost River from the Oregon border to Tule Lake .1 .2 Tule Lake Refuge .1 .2 Lower Klamath Refuge .1 .2 Region 2 San Francisco Bay-Mercury Region 2 Source:Non-Urban Stormwater Runoff TMDL Type: Bay Name Pollutant Stressor/WLA TMDL Completion Date San Francisco Bay Mercury 25 kg/year 08 09 2006 Region 4 Ballona Creek-Metals and Selenium Region 4 Source: NPDES General Construction TMDL Completion Date: 12 22 2005 TMDL Type: Creek Pollutant Stressors/WLA Copper (Cu) Lead (Pb) Selenium (Se) Zinc (Zn) g/day g/day/acre g/day g/day/acre g/day g/day/acre g/day g/day/acre Ballona Creek 4.94E-07 x Daily storm volume (L) 2.20E-10 x Daily storm volume (L) 1.62E-06 x Daily storm volume (L) 7.20E-10 x Daily storm volume (L) 1.37E-07 x Daily storm volume (L) 6.10E-11 x Daily storm volume (L) 3.27E-06 x Daily storm volume (L) 1.45E-09 x Daily storm volume (L)
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 2 General Construction Storm Water Permits: Waste load allocations will be incorporated into the State Board general permit upon renewal or into a watershed-specific general permit developed by the Regional Board. • Dry-weather Implementation Non-storm water flows authorized by the General Permit for Storm Water Discharges Associated with Construction Activity (Water Quality Order No. 99-08 DWQ), or any successor order, are exempt from the dry-weather waste load allocation equal to zero as long as they comply with the provisions of sections C.3 and A.9 of the Order No. 99-08 DWQ, which state that these authorized non-storm discharges shall be: (1) infeasible to eliminate (2) comply with BMPs as described in the Storm Water Pollution Prevention Plan prepared by the permittee, and (3) not cause or contribute to a violation of water quality standards, or comparable provisions in any successor order. Unauthorized non-storm water flows are already prohibited by Order No. 99-08 DWQ. • Wet-weather Implementation Within seven years of the effective date of the TMDL, the construction industry will submit the results of BMP effectiveness studies to determine BMPs that will achieve compliance with the final waste load allocations assigned to construction storm water permittees. • Regional Board staff will bring the recommended BMPs before the Regional Board for consideration within eight years of the effective date of the TMDL. • General construction storm water permittees will be considered in compliance with final waste load allocations if they implement these Regional Board approved BMPs. All permittees must implement the approved BMPs within nine years of the effective date of the TMDL. If no effectiveness studies are conducted and no BMPs are approved by the Regional Board within eight years of the effective date of the TMDL, each general construction storm water permit holder will be subject to site-specific BMPs and monitoring requirements to demonstrate compliance with final waste load allocations. Region 4 Calleaguas Creek-OC Pesticides, PCBs, and Siltation Interim Requirements Region 4 Calleaguas Creek Source: Minor NPDES point sources/WDRsTMDL Completion Date: 3 14 2006 TMDL Type:Creek Pollutant Stressor WLA Daily Max (µg/L) WLA Monthly Ave (µg/L) Chlordane 1.2 0.59 4,4-DDD 1.7 0.84 4,4-DDE 1.2 0.59 4,4-DDT 1.2 0.59 Dieldrin 0.28 0.14 PCB’s 0.34 0.17 Toxaphene 0.33 0.16
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 3 Final WLA (ng/g) Region 4 Calleaguas Creek Source: Stormwater Permittees TMDL Completion Date: 3 14 2006 TMDL Type:Creek Chlordane 4,4-DDD4,4-DDE 4,4-DDT Dieldrin PCB’s Toxaphene Mugu Lagoon* 3.3 2.0 2.2 0.3 4.3 180.0 360.0 Callegaus Creek 3.3 2.0 1.4 0.30.2 120.0 0.6 Revolon Slough (SW)* 0.9 2.0 1.4 0.30.1 130.0 1.0 Arroyo Las posas(SW)* 3.3 2.0 1.4 0.30.2 120.0 0.6 Arroyo Simi 3.3 2.0 1.4 0.30.2 120.0 0.6 Conejo Creek 3.3 2.0 1.4 0.30.2 120.0 0.6 Interim Requirements (ng/g) Mugu Lagoon* 25.0 69.0 300.0 39.0 19.0 180. 22900.0 Callegaus Creek 17.0 66.0 470.0 110.0 3.0 3800.0 260.0 Revolon Slough (SW)* 48.0 400.0 1600.0 690.0 5.7 7600.0 790.0 Arroyo Las posas(SW)* 3.3 290.0 950.0 670.0 1.1 25700.0 230.0 Arroyo Simi 3.3 14.0 170.0 25.0 1.1 25700.0 230.0 Conejo Creek 3.4 5.3 20.0 2.0 3.0 3800.0 260.0 *(SW)=Subwatershed *Mugu Lagoon includes Duck pond/Agricultural Drain/Mugu/Oxnard Drain #2 Compliance with sediment based WLAs is measured as an instream annual average at the base of each subwatershed where the discharges are located. Region 4 Calleguas Creek-Salts Final Dry Weather Pollutant WLA (mg/L) Region 4 Calleaguas Creek Source Permitted Stormwater Dischargers TMDL Completion Date: 12 2 2008 TMDL Type:Creek Critical Condition Flow Rate (mgd) Chloride (lb/day) TDS (lb/day) Sulfate (lb/day) Boron (lb/day) Simi 1.39 1738.0 9849.0 2897.0 12.0 Las Posas 0.13 157.0 887.0 261.0 N/A Conejo 1.26 1576.0 8931.0 2627.0 N/A
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 4 Camarillo 0.06 72.0 406.0 119.0 N/A Pleasant Valley (Calleguas) 0.12 150.0 850.0 250.0 N/A Pleasant Valley (Revolon) 0.25 314.0 1778.0 523.0 2.0 Dry Weather Interim Pollutant WLA (mg/L) Chloride (mg/L) TDS (mg/L) Sulfate (mg/L) Boron (mg/L) Simi 230.0 1720.0 1289.0 1.3 Las Posas 230.0 1720.0 1289.0 1.3 Conejo 230.0 1720.0 1289.0 1.3 Camarillo 230.0 1720.0 1289.0 1.3 Pleasant Valley (Calleguas) 230.0 1720.0 1289.0 1.3 Pleasant Valley (Revolon) 230.0 1720.0 1289.0 1.3 • General Construction permittees are assigned a dry weather wasteload allocation equal to the average dry weather critical condition flow rate multiplied by the numeric target for each constituent. Waste load allocations apply in the receiving water at the base of each subwatershed. Dry weather allocations apply when instream flow rates are below the 86th percentile flow and there has been no measurable precipitation in the previous 24 hours. • Because wet weather flows transport a large mass of salts at low concentrations, these dischargers meet water quality objectives during wet weather. • Interim limits are assigned for dry weather discharges from areas covered by NPDES stormwater permits to allow time to implement appropriate actions. The interim limits are assigned as concentration based receiving water limits set to the 95th percentile of the discharger data as a monthly average limit except for chloride. The 95th percentile for chloride was 267 mg/L which is higher than the recommended criteria set forth in the Basin Plan for protection of sensitive beneficial uses including aquatic life. Therefore, the interim limit for chloride for Permitted Stormwater Dischargers is set equal to 230 mg/L to ensure protection of sensitive beneficial uses in the Calleguas Creek watershed. Region 4 San Gabriel River and Tributaries-Metals and Selenium Region 4 San Gabriel River and Tributaries Source: Construction Stormwater Dischargers TMDL Completion Date: 3 2007 TMDL Type: Creek Pollutant Stressor Wet weather Allocations Dry Weather Allocations % of Watershed
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 5 Wet-weather allocations for lead in San Gabriel River Reach 2. Concentration-based allocations apply to non-stormwater NPDES discharges. Stormwater allocations are expressed as a percent of load duration curve. Mass-based values presented in table are based on a flow of 260 cfs (daily storm volume = 6.4 x108 liters). There are 1555 acres of water in the entire watershed, 37.4 acres of water in the Reach 1 subwatershed (2.4%), and 269 acres in the Coyote Creek subwatershed (17%). General Construction Storm Water Permits Waste load allocations for the general construction storm water permits may be incorporated into the State Board general permit upon renewal or into a watershed-specific general permit developed by the Regional Board. An estimate of direct atmospheric deposition is developed based on the percent area of surface water in the watershed. Approximately 0.4% of the watershed area draining to San Gabriel River Reach 2 is comprised of water and approximately 0.2% of the watershed area draining to Coyote Creek is comprised of water. Region 4 The Harbor Beaches of Ventura County-Bacteria The TMDL has a multi-part numeric target based on the bacteriological water quality objectives for marine water to protect the water contact recreation use. These targets are the most appropriate indicators of public health risk in recreational waters. Bacteriological objectives are set forth in Chapter 3 of the Basin Plan. The objectives are based on four bacteria indicators and include both geometric mean limits and single sample limits. The Basin Plan objectives that serve as the numeric targets for this TMDL are: San Gabriel Reach 2 Lead (Pb) 0.7% * 166 µg/l * Daily Storm Vol N/A 0.7% San Gabriel Reach 2 Lead (Pb) Mass based 0.8 kg/d N/A 0.7% Coyote Creek Copper (Cu) 0.285 kg/d 0 5.0% Coyote Creek Lead (Pb) 1.70 kg/d N/A 5.0% Coyote Creek Zinc (Zn) 2.4 kg/d N/A 5.0% San Jose Creek Reach 1 and 2 Selenium 5 µg/L 5 µg/L 5.0%
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 6 The General NPDES Construction permit is seen as a minor contributor and is given no allocation General NPDES permits, individual NPDES permits, the Statewide Industrial Storm Water General Permit, the Statewide Construction Activity Storm Water General Permit, and WDR permittees in the Channel Islands Harbor subwatershed are assigned WLAs of zero (0) days of allowable exceedances for all three time periods and for the single sample limits and the rolling 30-day geometric mean. Any future enrollees under a general NPDES permit, individual NPDES permit, the Statewide Industrial Storm Water General Permit, the Statewide Construction Activity Storm Water General Permit, and WDR will also be subject to a WLA of zero (0) days of allowable exceedances. Region 4 Resolution No. 03-009 Los Angeles River and Tributaries-Nutrients Minor Point Sources Waste loads are allocated to minor point sources enrolled under NPDES or WDR permits including but not limited to Tapia WRP, Whittier Narrows WRP, Los Angeles Zoo WRP, industrial and construction stormwater, and municipal storm water and urban runoff from municipal separate storm sewer systems (MS4s) Malibu Creek Attachment A to Resolution No. 2004-019R-Bacteria 12 13 2004 The WLAs for permittees under the NPDES General Stormwater Construction Permit are zero (0) days of allowable exceedances for all three time periods and for the single sample limits and the rolling 30-day geometric mean. Region 4 Marina del Rey Harbor, Mothers’ Beach and Back Basins Region 4 Minor Point Sources for NPDES/WDR Permits TMDL Completion Date: 7 10 2003 TMDL Type: River Pollutant Stressor/WLA Total Ammonia (NH3) Nitrate-nitrogen (NO3-N) Nitrite-nitrogen (NO2-N) NO3-N + NO3-N 1 Hr Ave mg/l 30 Day Ave mg/l 30 Day Ave mg/l 30 Day Ave mg/l LA River Above Los Angeles-Glendale WRP (LAG) 4.7 1.6 8.0 1.0 8.0 LA River Below LAG 8.7 2.4 8.0 1.0 8.0 Los Angeles Tributaries 10.1 2.3 8.0 1.0 8.0
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 7 Attachment A to Resolution No. 2003-012-Bacteria 8 7 2003 As discussed in “Source Analysis”, discharges from general NPDES permits, general industrial storm water permits and general construction storm water permits are not expected to be a significant source of bacteria. Therefore, the WLAs for these discharges are zero (0) days of allowable exceedances for all three time periods and for the single sample limits and the rolling 30-day geometric mean. Any future enrollees under a general NPDES permit, general industrial storm water permit or general construction storm water permit within the MdR Watershed will also be subject to a WLA of zero days of allowable exceedances. Region 4 San Gabriel River and Tributaries-Metals and Selenium Dry Weather Selenium WLA A zero WLA is assigned to the industrial and construction stormwater permits during dry weather. Non-storm water discharges are already prohibited or restricted by existing general permits. Each enrollee under the general construction stormwater permit receives a WLA on a per acre basis Region 4 General Construction Permittees TMDL Completion Date: 7 13 2006 TMDL Type: River Total Recoverable Metals (kg/day) Copper (Cu) Kg/day Lead (Pb) Kg/day Zinc (Zn) Kg/day San Gabriel River Reach 2 and upstream reaches/tributaries XXXX Daily storm volume x 1.24 µg/L XXXX Coyote Creek and Tributaries Daily storm volume x 0.7 µg/L Daily storm volume x 4.3 µg/L Daily storm volume x 6.2 µg/L Region 4 General Construction Permittees TMDL Completion Date: 7 13 2006 TMDL Type: River Total Recoverable Metals (kg/day/acre) Copper (Cu) Kg/acre/day Lead (Pb) Kg/acre/day Zinc (Zn) Kg/acre/day San Gabriel River Reach 2 and upstream reaches/tributaries XXXX Daily storm volume x 0.56 µg/L XXXX
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 8 For the general industrial and construction storm water permits, the daily storm volume is measured at USGS station 11085000 for discharges to Reach 2 and above and at LACDPW flow gauge station F354-R for discharges to Coyote Creek. General construction storm water permits WLAs will be incorporated into the State Board general permit upon renewal or into a watershed-specific general permit developed by the Regional Board. Dry-weather implementation Non-storm water flows authorized by the General Permit for Storm Water Discharges Associated with Construction Activity (NPDES Permit No. CAS000002), or any successor permit, are exempt from the dry-weather WLA equal to zero as long as they comply with the provisions of sections C.3.and A.9 of the Order No. 99-08 DWQ, which state that these authorized non-storm discharges shall be (1) infeasible to eliminate (2) comply with BMPs as described in the Storm Water Pollution Prevention Plan prepared by the permittee, and (3) not cause or contribute to a violation of water quality standards, or comparable provisions in any successor order. Unauthorized non-storm water flows are already prohibited by Permit No. CAS000002. Upon permit issuance, renewal, or re-opener Non-storm water flows not authorized by Order No. 99-08 DWQ, or any successor order, shall achieve dry-weather WLAs. WLAs shall be expressed as NPDES water quality-based effluent limitations specified in accordance with federal regulations and state policy on water quality control. Effluent limitations may be expressed as permit conditions, such as the installation, maintenance, and monitoring of Regional Board-approved BMPs. Six years from the effective date of the TMDL The construction industry will submit the results of wet-weather BMP effectiveness studies to the Los Angeles Regional Board for consideration. In the event that no effectiveness studies are conducted and no BMPs are approved, permittees shall be subject to site-specific BMPs and monitoring to demonstrate BMP effectiveness. Seven years from the effective date of the TMDL The Los Angeles Regional Board will consider results of the wet weather BMP effectiveness studies and consider approval of BMPs. Eight years from the effective date of the TMDL All general construction storm water permittees shall implement Regional Board-approved BMPs. Region 8 RESOLUTION NO. R8-2007- 0024 Coyote Creek and Tributaries Daily storm volume x 0.12 µg/L Daily storm volume x 0.70 µg/L Daily storm volume x 1.01 µg/L
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 9 Total Maximum Daily Loads (TMDLs) for San Diego Creek, Upper and Lower Newport Bay, Orange County, California *Red= Informational WLA only, not for enforcement purposes Organochlorine Compounds TMDLs Implementation Tasks and Schedule Regional Board staff shall develop a SWPPP Improvement Program that identifies the Regional Board’s expectations with respect to the content of SWPPPs, including documentation regarding the selection and implementation of BMPs, and a sampling and analysis plan. The Improvement Program shall include specific guidance regarding the development and implementation of monitoring plans, including the constituents to be monitored, sampling frequency and analytical protocols. The SWPPP Improvement Program shall be completed by (the date of OAL approval of this BPA). No later than two months from completion of the Improvement Program, Board staff shall assure that the requirements of the Program are communicated to interested parties, including dischargers with existing authorizations under the General Construction Permit. Existing, authorized dischargers shall revise their project SWPPPs as needed to address the Program requirements as soon as possible but no later than (three months of completion of the SWPPP Improvement Program). Applicable SWPPPs that do not adequately address the Program requirements shall be considered inadequate and enforcement by the Regional Board shall proceed accordingly. The Caltrans and Orange County MS4 permits shall be revised as needed to assure that the permittees communicate the Regional Board’s SWPPP expectations, based on the SWPPP Improvement Program, with the Standard Conditions of Approval. Region 8 NPDES Construction Permit TMDL Completion Date: 1 24 1995 TMDL Type: River. Cr, Bay Organochlorine Compounds Total DDT Chlordane Total PCBs Toxaphene g/day g/yr g/day g/yr g/day g/yr g/day g/yr San Diego Creek .27 99.8 .18* 64.3* .09* 31.5* .004 1.5 Upper Newport Bay .11 40.3 .06 23.4 .06 23.2 X X Lower Newport Bay .04 14.9 .02 8.6 .17 60.7 X X
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 1 Appendix 4 Sediment TMDLs Implemented Sediment TMDLs in California. Construction was listed as a source in all fo these TMDLs in relation to road construction. Although construction was mentioned as a source, it was not given a specific allocation amount. The closest allocation amount would be for the road activity management WLA. Implementation Phase – Adoption process by the Regional Board, the State Water Resources Control Board, the Office of Administrative Law, and the US Environmental Protection Agency completed and TMDL being implemented. A. Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres WLA tons mi2 yr 1 R1.epa.albionfinaltmdl R Albion River Sedimentation Road Construction 2001 43 acres See A (table 6) B Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres WLA tons mi2 yr 1 R1.epa.EelR-middle.mainSed.temp R Middle Main Eel River and Tributaries (from Dos Rios to the South Fork) Sedimentation Road Construction 2005-2006 521 mi2 100 C Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres WLA tons mi2 yr 1 R1.epa.EelRsouth.sed.temp R South Fork Eel River Sedimentation Road Construction 12 1999 See chart 473 D Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres WLA tons mi2 yr 1 R1.epa.bigfinaltmdl R Big River Sedimentation Road Construction 12 2001 181 mi2watershed drainage TMDL = loading capacity = nonpoint sources + background =
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 2 393 t mi2 yr E Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres WLA tons mi2 yr 1 R1.epa.EelR-lower.Sed.temp-121807-signed R Lower Eel River Sedimentation Road Construction 12 2007 300 square-mile watershed 898 F Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres WLA tons mi2 yr 1 R1.epa.EelR-middle.Sed.temp- R Middle Fork Eel River Sedimentation Road Construction 12 2003 753 mi2(approx. 482,000 acres) 82 G Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres Mi2 WLA tons mi2 yr 1 R1.epa.EelRnorth-Sed.temp.final-121807-signed R North Fork Eel River Sedimentation Road Construction 12 30 2002 289 (180,020 acres) 20 H Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres Mi2 WLA tons mi2 yr 1 R1.epa.EelR-upper.mainSed.temp- R Upper Main Eel River and Tributaries (including Tomki Creek, Outlet Creek and Lake Pillsbury) Sedimentation Road Construction 12 29 2004 688 (approx. 440,384 acres) 14
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 3 I Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres WLA tons mi2 yr 1 R1.epa.gualalafinaltmdl R Gualala River Sedimentation Road Construction Not sure 300 (191,145 acres) 7 J Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres mi2 WLA tons mi2 yr 1 R1.epa.Mad-sed.turbidity R Mad River Sedimentation Road Construction 12 21 2007 480 174 K Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres mi2 WLA tons mi2 yr 1 R1.epa.mattole.sediment R Mattole River Sedimentation Road Construction 12 30 2003 296 27 or 520+27 = 547 L Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres mi2 WLA tons mi2 yr 1 R1.epa.navarro.sed.temp R Navarro River Sedimentation Road Construction Not sure 315 (201,600 acres). 50 M Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres mi2 WLA tons mi2 yr 1 R1.epa.noyo.sediment R Noyo River Sedimentation Road Construction 12 16 1999 113 (72,323 acres) 68 (three areas measured) Table 16 in the TMDL
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 4 N Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres mi2 WLA tons mi2 yr 1 R1.epa.RedwoodCk.sed Cr Redwood Creek Sedimentation Road Construction 12 30 1998 278 1900 Total allocation O Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres mi2 WLA – Roads tons mi2 yr 1 R1.epa.tenmile.sed R Ten Mile River Sedimentation Road Construction 2000 120 9 P Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres mi2 WLA management tons mi2 yr 1 R1.epa.trinity.sed R Trinity River Sedimentation Road Construction 12 20 2001 2000 of 3000 covered in this TMDL See rows below 1 Cr Horse Linto Creek Sedimentation Road Construction 12 20 2001 64 528 1 Cr Mill creek and Tish Tang Sedimentation Road Construction 12 20 2001 39 210 1 Cr Willow Creek Sedimentation Road Construction 12 20 2001 43 94 1 Cr Campbell Creek and Supply Creek Sedimentation Road Construction 12 20 2001 11 1961 1 Cr Lower Mainstem and Coon Creek Sedimentation Road Construction 12 20 2001 32 63 1 R Reference Sedimentation Road 12 20 2001 434 24
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 5 1 2 3 4 5 6 7 8 Subwatershed 1 Construction 1 Cr Canyon Creek Sedimentation Road Construction 12 20 2001 64 326 1 R Upper Tributaries2 Sedimentation Road Construction 12 20 2001 72 67 1 R Middle Tributaries3 Sedimentation Road Construction 12 20 2001 54 53 1 R Lower Tributaries4 Sedimentation Road Construction 12 20 2001 96 55 1 Cr Weaver and Rush Creeks Sedimentation Road Construction 12 20 2001 72 169 1 Cr Deadwood Creek Hoadley Gulch Poker Bar Sedimentation Road Construction 12 20 2001 47 68 1 L Lewiston Lake Sedimentation Road Construction 12 20 2001 25 49 1 Cr Grassvalley Creek Sedimentation Road Construction 12 20 2001 37 44 1 Cr Indian Creek Sedimentation Road Construction 12 20 2001 34 81 1 Cr Reading and Browns Creek Sedimentation Road Construction 12 20 2001 104 66 1 Cr Reference Subwatersheds5 Sedimentation Road Construction 12 20 2001 235 281 1 L, Cr Westside tributaries6 Sedimentation Road Construction 12 20 2001 93 105 1 R, Cr, G Upper trinity7 Sedimentation Road Construction 12 20 2001 161 690 1 R, Cr, G East Fork Tributaries8Sedimentation Road Construction 12 20 2001 115 65
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 6 1 New River, Big French, Manzanita, North Fork, East Fork, North Fork 2 Dutch, Soldier, Oregon gulch, Conner Creek 3 Big Bar, Prairie Creek, Little French Creek 4 Swede, Italian, Canadian, Cedar Flat, Mill, McDonald, Hennessy, Quimby, Hawkins, Sharber 5 Stuarts Fork, Swift Creek, Coffee Creek 6 Stuart Arm, Stoney Creek, Mule Creek, East Fork, Stuart Fork, West Side Trinity Lake, Hatchet Creek, Buckeye Creek, 7 Upper Trinity River, Tangle Blue, Sunflower, Graves, Bear Upper Trinity Mainstream, Ramshorn Creek, Ripple Creek, Minnehaha Creek, Snowslide Gulch, Scorpion Creek 8 East Fork Trinity, Cedar Creek, Squirrel Gulch 9 East Side Tributaries, Trinity Lake 9 1 R, L Eastside Tributaries9 Sedimentation Road Construction 12 20 2001 89 60 Q Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres mi2 WLA tons mi2 yr 1 R1.epa.trinity.so.sed R, Cr South Fork Trinity River and Hayfork Creek Sedimentation Road Construction 12 1998 Not given, 19 miles long 33 (road total) R Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres mi2 WLA tons mi2 yr 1 R1.epa.vanduzen.sed R, Cr Van Duzen River and Yager Creek Sedimentation Various 12 16 1999 429 1353 total allocation 1 Upper Basin Sedimentation Road Construction 7 1 Middle Basin Sedimentation Road Construction 22 1 Lower Basin Sedimentation Road Construction 20 S Region Type Name Pollutant Stressor Potential TMDL Watershed WLA tons mi2
APPENDIX 4 2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ 7 Adopted TMDLs for Construction Sediment Sources Sources Completion Date Acres mi2 yr 6 R6.blackwood.sed Cr Blackwood Creek (Placer County) Bedded Sediment Various 9 2007 11 17272 total T Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Acres mi2 WLA tons mi2 yr 6 R6.SquawCk.sed R Squaw Creek (Placer County) Sedimentation /controllable sources Various – basin plan amendment 4 13 2006 8.2 10,900 Region Type Name Pollutant Stressor Potential Sources TMDL Completion Date Watershed Area mi2 Waste load Allocation tons mi2 yr 8 R Newport Bay San Diego Creek Watershed Sedimentation Construction Land Development 1999 2.24 (1432 acres) 125,000 tons per Year (no more than 13,000 tons per year from construction sites)
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APPENDIX 5:
Glossary
Active Areas of Construction
All areas subject to land surface disturbance activities related to the project
including, but not limited to, project staging areas, immediate access areas and
storage areas. All previously active areas are still considered active areas until
final stabilization is complete. [The construction activity Phases used in this
General Permit are the Preliminary Phase, Grading and Land Development
Phase, Streets and Utilities Phase, and the Vertical Construction Phase.]
Active Treatment System (ATS)
A treatment system that employs chemical coagulation, chemical flocculation, or
electrocoagulation to aid in the reduction of turbidity caused by fine suspended
sediment.
Acute Toxicity Test
A chemical stimulus severe enough to rapidly induce a negative effect; in aquatic
toxicity tests, an effect observed within 96 hours or less is considered acute.
Air Deposition
Airborne particulates from construction activities.
Approved Signatory
A person who has been authorized by the Legally Responsible Person to sign,
certify, and electronically submit Permit Registration Documents, Notices of
Termination, and any other documents, reports, or information required by the
General Permit, the State or Regional Water Board, or U.S. EPA. The Approved
Signatory must be one of the following:
1. For a corporation or limited liability company: a responsible corporate officer.
For the purpose of this section, a responsible corporate officer means: (a) a
president, secretary, treasurer, or vice-president of the corporation in charge
of a principal business function, or any other person who performs similar
policy or decision-making functions for the corporation or limited liability
company; or (b) the manager of the facility if authority to sign documents has
been assigned or delegated to the manager in accordance with corporate
procedures;
2. For a partnership or sole proprietorship: a general partner or the proprietor,
respectively;
3. For a municipality, State, Federal, or other public agency: a principal
executive officer, ranking elected official, city manager, council president, or
any other authorized public employee with managerial responsibility over the
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construction or land disturbance project (including, but not limited to, project
manager, project superintendent, or resident engineer);
4. For the military: any military officer or Department of Defense civilian, acting
in an equivalent capacity to a military officer, who has been designated;
5. For a public university: an authorized university official;
6. For an individual: the individual, because the individual acts as both the
Legally Responsible Person and the Approved Signatory; or
7. For any type of entity not listed above (e.g. trusts, estates, receivers): an
authorized person with managerial authority over the construction or land
disturbance project.
Beneficial Uses
As defined in the California Water Code, beneficial uses of the waters of the state
that may be protected against quality degradation include, but are not limited to,
domestic, municipal, agricultural and industrial supply; power generation;
recreation; aesthetic enjoyment; navigation; and preservation and enhancement
of fish, wildlife, and other aquatic resources or preserves.
Best Available Technology Economically Achievable (BAT)
As defined by USEPA, BAT is a technology-based standard established by the
Clean Water Act (CWA) as the most appropriate means available on a national
basis for controlling the direct discharge of toxic and nonconventional pollutants
to navigable waters. The BAT effluent limitations guidelines, in general,
represent the best existing performance of treatment technologies that are
economically achievable within an industrial point source category or
subcategory.
Best Conventional Pollutant Control Technology (BCT)
As defined by USEPA, BCT is a technology-based standard for the discharge
from existing industrial point sources of conventional pollutants including
biochemical oxygen demand (BOD), total suspended sediment (TSS), fecal
coliform, pH, oil and grease.
Best Professional Judgment (BPJ)
The method used by permit writers to develop technology-based NPDES permit
conditions on a case-by-case basis using all reasonably available and relevant
data.
Best Management Practices (BMPs)
BMPs are scheduling of activities, prohibitions of practices, maintenance
procedures, and other management practices to prevent or reduce the discharge
of pollutants. BMPs also include treatment requirements, operating procedures,
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and practices to control site runoff, spillage or leaks, sludge or waste disposal, or
drainage from raw material storage.
Chain of Custody (COC)
Form used to track sample handling as samples progress from sample collection
to the analytical laboratory. The COC is then used to track the resulting
analytical data from the laboratory to the client. COC forms can be obtained from
an analytical laboratory upon request.
Coagulation
The clumping of particles in a discharge to settle out impurities, often induced by
chemicals such as lime, alum, and iron salts.
Common Plan of Development
Generally a contiguous area where multiple, distinct construction activities may
be taking place at different times under one plan. A plan is generally defined as
any piece of documentation or physical demarcation that indicates that
construction activities may occur on a common plot. Such documentation could
consist of a tract map, parcel map, demolition plans, grading plans or contract
documents. Any of these documents could delineate the boundaries of a
common plan area. However, broad planning documents, such as land use
master plans, conceptual master plans, or broad-based CEQA or NEPA
documents that identify potential projects for an agency or facility are not
considered common plans of development.
Daily Average Discharge
The discharge of a pollutant measured during any 24-hour period that reasonably
represents a calendar day for purposes of sampling. For pollutants with
limitations expressed in units of mass, the daily discharge is calculated as the
total mass of the pollutant discharged during the day. For pollutants with
limitations expressed in other units of measurement (e.g., concentration) the
daily discharge is calculated as the average measurement of the pollutant
throughout the day (40 CFR 122.2). In the case of pH, the pH must first be
converted from a log scale.
Debris
Litter, rubble, discarded refuse, and remains of destroyed inorganic
anthropogenic waste.
Direct Discharge
A discharge that is routed directly to waters of the United States by means of a
pipe, channel, or ditch (including a municipal storm sewer system), or through
surface runoff.
APPENDIX 5
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
4
Discharger
The Legally Responsible Person (see definition) or entity subject to this General
Permit.
Dose Rate (for ATS)
In exposure assessment, dose (e.g. of a chemical) per time unit (e.g. mg/day),
sometimes also called dosage.
Drainage Area
The area of land that drains water, sediment, pollutants, and dissolved materials
to a common outlet.
Effluent
Any discharge of water by a discharger either to the receiving water or beyond
the property boundary controlled by the discharger.
Effluent Limitation
Any numeric or narrative restriction imposed on quantities, discharge rates, and
concentrations of pollutants which are discharged from point sources into waters
of the United States, the waters of the contiguous zone, or the ocean.
Erosion
The process, by which soil particles are detached and transported by the actions
of wind, water, or gravity.
Erosion Control BMPs
Vegetation, such as grasses and wildflowers, and other materials, such as straw,
fiber, stabilizing emulsion, protective blankets, etc., placed to stabilize areas of
disturbed soils, reduce loss of soil due to the action of water or wind, and prevent
water pollution.
Field Measurements
Testing procedures performed in the field with portable field-testing kits or
meters.
Final Stabilization
All soil disturbing activities at each individual parcel within the site have been
completed in a manner consistent with the requirements in this General Permit.
First Order Stream
Stream with no tributaries.
Flocculants
Substances that interact with suspended particles and bind them together to form
flocs.
APPENDIX 5
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
5
Good Housekeeping BMPs
BMPs designed to reduce or eliminate the addition of pollutants to construction
site runoff through analysis of pollutant sources, implementation of proper
handling/disposal practices, employee education, and other actions.
Grading Phase (part of the Grading and Land Development Phase)
Includes reconfiguring the topography and slope including; alluvium removals;
canyon cleanouts; rock undercuts; keyway excavations; land form grading; and
stockpiling of select material for capping operations.
Hydromodification
Hydromodification is the alteration of the hydrologic characteristics of coastal and
non-coastal waters, which in turn could cause degradation of water resources.
Hydromodification can cause excessive erosion and/or sedimentation rates,
causing excessive turbidity, channel aggradation and/or degradation.
Identified Organisms
Organisms within a sub-sample that is specifically identified and counted.
Inactive Areas of Construction
Areas of construction activity that are not active and those that have been active
and are not scheduled to be re-disturbed for at least 14 days.
Index Period
The period of time during which bioassessment samples must be collected to
produce results suitable for assessing the biological integrity of streams and
rivers. Instream communities naturally vary over the course of a year,and
sampling during the index period ensures that samples are collected during a
time frame when communities are stable so that year-to-year consistency is
obtained. The index period approach provides a cost-effective alternative to year-
round sampling. Furthermore, sampling within the appropriate index period will
yield results that are comparable to the assessment thresholds or criteria for a
given region, which are established for the same index period. Because index
periods differ for different parts of the state, it is essential to know the index
period for your area.
K Factor
The soil erodibility factor used in the Revised Universal Soil Loss Equation
(RUSLE). It represents the combination of detachability of the soil, runoff
potential of the soil, and the transportability of the sediment eroded from the soil.
Legally Responsible Person
The Legally Responsible Person (LRP) will typically be the project proponent.
The categories of persons or entities that are eligible to serve as the LRP are set
forth below. For any construction or land disturbance project where multiple
persons or entities are eligible to serve as the LRP, those persons or entities
APPENDIX 5
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
6
shall select a single LRP. In exceptional circumstances, a person or entity that
qualifies as the LRP may provide written authorization to another person or entity
to serve as the LRP. In such a circumstance, the person or entity that provides
the authorization retains all responsibility for compliance with the General Permit.
Except as provided in category 2(d), a contractor who does not satisfy the
requirements of any of the categories below is not qualified to be an LRP.
The following persons or entities may serve as an LRP:
1. A person, company, agency, or other entity that possesses a real property
interest (including, but not limited to, fee simple ownership, easement,
leasehold, or other rights of way) in the land upon which the construction or
land disturbance activities will occur for the regulated site.
2. In addition to the above, the following persons or entities may also serve as
an LRP:
a. For linear underground/overhead projects, the utility company,
municipality, or other public or private company or agency that owns or
operates the LUP;
b. For land controlled by an estate or similar entity, the person who has day-
to-day control over the land (including, but not limited to, a bankruptcy
trustee, receiver, or conservator);
c. For pollution investigation and remediation projects, any potentially
responsible party that has received permission to conduct the project from
the holder of a real property interest in the land; or
d. For U.S. Army Corp of Engineers projects, the U.S. Army Corps of
Engineers may provide written authorization to its bonded contractor to
serve as the LRP, provided, however, that the U.S. Army Corps of
Engineers is also responsible for compliance with the general permit, as
authorized by the Clean Water Act or the Federal Facilities Compliance
Act.
Likely Precipitation Event
Any weather pattern that is forecasted to have a 50% or greater chance of
producing precipitation in the project area. The discharger shall obtain likely
precipitation forecast information from the National Weather Service Forecast
Office (e.g., by entering the zip code of the project’s location at
http://www.srh.noaa.gov/forecast).
Maximum Allowable Threshold Concentration (MATC)
The allowable concentration of residual, or dissolved, coagulant/flocculant in
effluent. The MATC shall be coagulant/flocculant-specific, and based on toxicity
APPENDIX 5
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7
testing conducted by an independent, third-party laboratory. A typical MATC
would be:
The MATC is equal to the geometric mean of the NOEC (No Observed Effect
Concentration) and LOEC (Lowest Observed Effect Concentration) Acute and
Chronic toxicity results for most sensitive species determined for the specific
coagulant. The most sensitive species test shall be used to determine the
MATC.
Natural Channel Evolution
The physical trend in channel adjustments following a disturbance that causes
the river to have more energy and degrade or aggrade more sediment. Channels
have been observed to pass through 5 to 9 evolution types. Once they pass
though the suite of evolution stages, they will rest in a new state of equilibrium.
Non-Storm Water Discharges
Discharges are discharges that do not originate from precipitation events. They
can include, but are not limited to, discharges of process water, air conditioner
condensate, non-contact cooling water, vehicle wash water, sanitary wastes,
concrete washout water, paint wash water, irrigation water, or pipe testing water.
Non-Visible Pollutants
Pollutants associated with a specific site or activity that can have a negative
impact on water quality, but cannot be seen though observation (ex: chlorine).
Such pollutants being discharged are not authorized.
Numeric Action Level (NAL)
Level is used as a warning to evaluate if best management practices are
effective and take necessary corrective actions. Not an effluent limit.
Original Sample Material
The material (i.e., macroinvertebrates, organic material, gravel, etc.) remaining
after the subsample has been removed for identification.
pH
Unit universally used to express the intensity of the acid or alkaline condition of a
water sample. The pH of natural waters tends to range between 6 and 9, with
neutral being 7. Extremes of pH can have deleterious effects on aquatic
systems.
Post-Construction BMPs
Structural and non-structural controls which detain, retain, or filter the release of
pollutants to receiving waters after final stabilization is attained.
APPENDIX 5
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
8
Preliminary Phase (Pre-Construction Phase - Part of the Grading and Land
Development Phase)
Construction stage including rough grading and/or disking, clearing and grubbing
operations, or any soil disturbance prior to mass grading.
Project
Qualified SWPPP Developer
Individual who is authorized to develop and revise SWPPPs.
Qualified SWPPP Practitioner
Individual assigned responsibility for non-storm water and storm water visual
observations, sampling and analysis, and responsibility to ensure full compliance
with the permit and implementation of all elements of the SWPPP, including the
preparation of the annual compliance evaluation and the elimination of all
unauthorized discharges.
Qualifying Rain Event
Any event that produces 0.5 inches or more precipitation with a 48 hour or
greater period between rain events.
R Factor
Erosivity factor used in the Revised Universal Soil Loss Equation (RUSLE). The
R factor represents the erosivity of the climate at a particular location. An
average annual value of R is determined from historical weather records using
erosivity values determined for individual storms. The erosivity of an individual
storm is computed as the product of the storm's total energy, which is closely
related to storm amount, and the storm's maximum 30-minute intensity.
Rain Event Action Plan (REAP)
Written document, specific for each rain event, that when implemented is
designed to protect all exposed portions of the site within 48 hours of any likely
precipitation event.
Remaining Sub sampled Material
The material (e.g., organic material, gravel, etc.) that remains after the organisms
to be identified have been removed from the subsample for identification.
(Generally, no macroinvertebrates are present in the remaining subsampled
material, but the sample needs to be checked and verified using a complete
Quality Assurance (QA) plan)
Routine Maintenance
Activities intended to maintain the original line and grade, hydraulic capacity, or
original purpose of a facility.
APPENDIX 5
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
9
Runoff Control BMPs
Measures used to divert runon from offsite and runoff within the site.
Run-on
Discharges that originate offsite and flow onto the property of a separate project
site.
Revised Universal Soil Loss Equation (RUSLE)
Empirical model that calculates average annual soil loss as a function of rainfall
and runoff erosivity, soil erodibility, topography, erosion controls, and sediment
controls.
Sampling and Analysis Plan
Document that describes how the samples will be collected, under what
conditions, where and when the samples will be collected, what the sample will
be tested for, what test methods and detection limits will be used, and what
methods/procedures will be maintained to ensure the integrity of the sample
during collection, storage, shipping and testing (i.e., quality assurance/quality
control protocols).
Sediment
Solid particulate matter, both mineral and organic, that is in suspension, is being
transported, or has been moved from its site of origin by air, water, gravity, or ice
and has come to rest on the earth's surface either above or below sea level.
Sedimentation
Process of deposition of suspended matter carried by water, wastewater, or other
liquids, by gravity. It is usually accomplished by reducing the velocity of the liquid
below the point at which it can transport the suspended material.
Sediment Control BMPs
Practices that trap soil particles after they have been eroded by rain, flowing
water, or wind. They include those practices that intercept and slow or detain the
flow of storm water to allow sediment to settle and be trapped (e.g., silt fence,
sediment basin, fiber rolls, etc.).
Settleable Solids (SS)
Solid material that can be settled within a water column during a specified time
frame. It is typically tested by placing a water sample into an Imhoff settling cone
and then allowing the solids to settle by gravity for a given length of time.
Results are reported either as a volume (mL/L) or a mass (mg/L) concentration.
Sheet Flow
Flow of water that occurs overland in areas where there are no defined channels
where the water spreads out over a large area at a uniform depth.
APPENDIX 5
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
10
Site
Soil Amendment
Any material that is added to the soil to change its chemical properties,
engineering properties, or erosion resistance that could become mobilized by
storm water.
Streets and Utilities Phase
Construction stage including excavation and street paving, lot grading, curbs,
gutters and sidewalks, public utilities, public water facilities including fire
hydrants, public sanitary sewer systems, storm sewer system and/or other
drainage improvements.
Structural Controls
Any structural facility designed and constructed to mitigate the adverse impacts
of storm water and urban runoff pollution
Suspended Sediment Concentration (SSC)
The measure of the concentration of suspended solid material in a water sample
by measuring the dry weight of all of the solid material from a known volume of a
collected water sample. Results are reported in mg/L.
Total Suspended Solids (TSS)
The measure of the suspended solids in a water sample includes inorganic
substances, such as soil particles and organic substances, such as algae,
aquatic plant/animal waste, particles related to industrial/sewage waste, etc. The
TSS test measures the concentration of suspended solids in water by measuring
the dry weight of a solid material contained in a known volume of a sub-sample
of a collected water sample. Results are reported in mg/L.
Toxicity
The adverse response(s) of organisms to chemicals or physical agents ranging
from mortality to physiological responses such as impaired reproduction or
growth anomalies.
Turbidity
The cloudiness of water quantified by the degree to which light traveling through
a water column is scattered by the suspended organic and inorganic particles it
contains. The turbidity test is reported in Nephelometric Turbidity Units (NTU) or
Jackson Turbidity Units (JTU).
Vertical Construction Phase
The Build out of structures from foundations to roofing, including rough
landscaping.
APPENDIX 5
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
11
Waters of the United States
Generally refers to surface waters, as defined by the federal Environmental
Protection Agency in 40 C.F.R. § 122.2.1
Water Quality Objectives (WQO)
Water quality objectives are defined in the California Water Code as limits or
levels of water quality constituents or characteristics, which are established for
the reasonable protection of beneficial uses of water or the prevention of
nuisance within a specific area.
1 The application of the definition of “waters of the United States” may be difficult to determine; there are
currently several judicial decisions that create some confusion. If a landowner is unsure whether the
discharge must be covered by this General Permit, the landowner may wish to seek legal advice.
APPENDIX 6
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
1
APPENDIX 6:
Acronym List
ASBS Areas of Special Biological Significance
ASTM American Society of Testing and Materials; Standard Test
Method for Particle-Size Analysis of Soils
ATS Active Treatment System
BASMAA Bay Area Storm water Management Agencies Association
BAT Best Available Technology Economically Achievable
BCT Best Conventional Pollutant Control Technology
BMP Best Management Practices
BOD Biochemical Oxygen Demand
BPJ Best Professional Judgment
CAFO Confined Animal Feeding Operation
CCR California Code of Regulations
CEQA California Environmental Quality Act
CFR Code of Federal Regulations
CGP NPDES General Permit for Storm Water Discharges
Associated with Construction Activities
CIWQS California Integrated Water Quality System
CKD Cement Kiln Dust
COC Chain of Custody
CPESC Certified Professional in Erosion and Sediment Control
CPSWQ Certified Professional in Storm Water Quality
CSMP Construction Site Monitoring Program
CTB Cement Treated Base
CTR California Toxics Rule
CWA Clean Water Act
CWC California Water Code
CWP Center for Watershed Protection
DADMAC Diallyldimethyl-ammonium chloride
DDNR Delaware Department of Natural Resources
DFG Department of Fish and Game
DHS Department of Health Services
DWQ Division of Water Quality
EC Electrical Conductivity
ELAP Environmental Laboratory Accreditation Program
EPA Environmental Protection Agency
ESA Environmentally Sensitive Area
ESC Erosion and Sediment Control
HSPF Hydrologic Simulation Program Fortran
JTU Jackson Turbidity Units
LID Low Impact Development
LOEC Lowest Observed Effect Concentration
LRP Legally Responsible Person
LUP Linear Underground/Overhead Projects
APPENDIX 6
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
2
MATC Maximum Allowable Threshold Concentration
MDL Method Detection Limits
MRR Monitoring and Reporting Requirements
MS4 Municipal Separate Storm Sewer System
MUSLE Modified Universal Soil Loss Equation
NAL Numeric Action Level
NEL Numeric Effluent Limitation
NICET National Institute for Certification in Engineering
Technologies
NOAA National Oceanic and Atmospheric Administration
NOEC No Observed Effect Concentration
NOI Notice of Intent
NOT Notice of Termination
NPDES National Pollutant Discharge Elimination System
NRCS Natural Resources Conservation Service
NTR National Toxics Rule
NTU Nephelometric Turbidity Units
O&M Operation and Maintenance
PAC Polyaluminum chloride
PAM Polyacrylamide
PASS Polyaluminum chloride Silica/sulfate
POC Pollutants of Concern
PoP Probability of Precipitation
POTW Publicly Owned Treatment Works
PRDs Permit Registration Documents
PWS Planning Watershed
QAMP Quality Assurance Management Plan
QA/QC Quality Assurance/Quality Control
REAP Rain Event Action Plan
Regional Board Regional Water Quality Control Board
ROWD Report of Waste Discharge
RUSLE Revised Universal Soil Loss Equation
RW Receiving Water
SMARTS Storm water Multi Application Reporting and Tracking
System
SS Settleable Solids
SSC Suspended Sediment Concentration
SUSMP Standard Urban Storm Water Mitigation Plan
SW Storm Water
SWARM Storm Water Annual Report Module
SWAMP Surface Water Ambient Monitoring Program
SWMM Storm Water Management Model
SWMP Storm Water Management Program
SWPPP Storm Water Pollution Prevention Plan
TC Treatment Control
TDS Total Dissolved Solids
APPENDIX 6
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
3
TMDL Total Maximum Daily Load
TSS Total Suspended Solids
USACOE U.S. Army Corps of Engineers
USC United States Code
USEPA United States Environmental Protection Agency
USGS United States Geological Survey
WDID Waste Discharge Identification Number
WDR Waste Discharge Requirements
WLA Waste Load Allocation
WET Whole Effluent Toxicity
WRCC Western Regional Climate Center
WQBEL Water Quality Based Effluent Limitation
WQO Water Quality Objective
WQS Water Quality Standard
APPENDIX 7
2009-0009-DWQ as amended by 2010-0014-DWQ & 2012-0006-DWQ
1
APPENDIX 7:
State and Regional Water Resources Control Board Contacts
NORTH COAST REGION (1)
5550 Skylane Blvd, Ste. A
Santa Rose, CA 95403
(707) 576-2220 FAX: (707)523-0135
CENTRAL COAST REGION (3)
895 Aerovista Place, Ste 101
San Luis Obispo, CA 93401
(805) 549-3147 FAX: (805) 543-0397
LAHONTAN REGION (6 SLT)
2501 Lake Tahoe Blvd.
South Lake Tahoe, CA 96150
(530) 542-5400 FAX: (530) 544-2271
SAN FRANCISCO BAY REGION (2)
1515 Clay Street, Ste. 1400
Oakland, CA 94612
(510) 622-2300 FAX: (510) 622-2640
LOS ANGELES REGION (4)
320 W. 4th Street, Ste. 200
Los Angeles, CA 90013
(213) 576-6600 FAX: (213) 576-6640
VICTORVILLE OFFICE (6V)
14440 Civic Drive, Ste. 200
Victorville, CA 92392-2383
(760) 241-6583 FAX: (760) 241-7308
CENTRAL VALLEY REGION (5S)
11020 Sun Center Dr., #200
Rancho Cordova, CA 95670-6114
(916) 464-3291 FAX: (916) 464-4645
COLORADO RIVER BASIN REGION (7)
73-720 Fred Waring Dr., Ste. 100
Palm Desert, CA 92260
(760) 346-7491 FAX: (760) 341-6820
FRESNO BRANCH OFFICE (5F)
1685 E St.
Fresno, CA 93706
(559) 445-5116 FAX: (559) 445-5910
SANTA ANA REGION (8)
3737 Main Street, Ste. 500
Riverside, CA 92501-3339
Phone (951) 782-4130 FAX: (951) 781-6288
REDDING BRANCH OFFICE (5R)
364 Knollcrest Drive, Ste. 205
Redding, CA 96002
(530) 224-4845 FAX: (530) 224-4857
SAN DIEGO REGION (9)
9174 Sky Park Court, Ste. 100
San Diego, CA 92123-4340
(858) 467-2952 FAX: (858) 571-6972
STATE WATER BOARD
PO Box 1977
Sacramento, CA 95812-1977
stormwater@waterboards.ca.gov
ATTACHMENT C
2009-0009-DWQ 1 September 2, 2009
ATTACHMENT C
RISK LEVEL 1 REQUIREMENTS
A. Effluent Standards
[These requirements are the same as those in the General Permit order.]
1. Narrative – Risk Level 1 dischargers shall comply with the narrative
effluent standards listed below:
a. Storm water discharges and authorized non-storm water
discharges regulated by this General Permit shall not contain a
hazardous substance equal to or in excess of reportable quantities
established in 40 C.F.R. §§ 117.3 and 302.4, unless a separate
NPDES Permit has been issued to regulate those discharges.
b. Dischargers shall minimize or prevent pollutants in storm water
discharges and authorized non-storm water discharges through the
use of controls, structures, and management practices that achieve
BAT for toxic and non-conventional pollutants and BCT for
conventional pollutants.
2. Numeric – Risk Level 1 dischargers are not subject to a numeric
effluent standard.
B. Good Site Management "Housekeeping"
1. Risk Level 1 dischargers shall implement good site management (i.e.,
"housekeeping") measures for construction materials that could
potentially be a threat to water quality if discharged. At a minimum,
Risk Level 1 dischargers shall implement the following good
housekeeping measures:
a. Conduct an inventory of the products used and/or expected to be
used and the end products that are produced and/or expected to be
produced. This does not include materials and equipment that are
designed to be outdoors and exposed to environmental conditions
(i.e. poles, equipment pads, cabinets, conductors, insulators,
bricks, etc.).
b. Cover and berm loose stockpiled construction materials that are not
actively being used (i.e. soil, spoils, aggregate, fly-ash, stucco,
hydrated lime, etc.).
ATTACHMENT C
2009-0009-DWQ 2 September 2, 2009
c. Store chemicals in watertight containers (with appropriate
secondary containment to prevent any spillage or leakage) or in a
storage shed (completely enclosed).
d. Minimize exposure of construction materials to precipitation. This
does not include materials and equipment that are designed to be
outdoors and exposed to environmental conditions (i.e. poles,
equipment pads, cabinets, conductors, insulators, bricks, etc.).
e. Implement BMPs to prevent the off-site tracking of loose
construction and landscape materials.
2. Risk Level 1 dischargers shall implement good housekeeping
measures for waste management, which, at a minimum, shall consist
of the following:
a. Prevent disposal of any rinse or wash waters or materials on
impervious or pervious site surfaces or into the storm drain system.
b. Ensure the containment of sanitation facilities (e.g., portable toilets)
to prevent discharges of pollutants to the storm water drainage
system or receiving water.
c. Clean or replace sanitation facilities and inspecting them regularly
for leaks and spills.
d. Cover waste disposal containers at the end of every business day
and during a rain event.
e. Prevent discharges from waste disposal containers to the storm
water drainage system or receiving water.
f. Contain and securely protect stockpiled waste material from wind
and rain at all times unless actively being used.
g. Implement procedures that effectively address hazardous and non-
hazardous spills.
h. Develop a spill response and implementation element of the
SWPPP prior to commencement of construction activities. The
SWPPP shall require that:
i. Equipment and materials for cleanup of spills shall be available
on site and that spills and leaks shall be cleaned up immediately
and disposed of properly; and
ATTACHMENT C
2009-0009-DWQ 3 September 2, 2009
ii. Appropriate spill response personnel are assigned and trained.
i. Ensure the containment of concrete washout areas and other
washout areas that may contain additional pollutants so there is no
discharge into the underlying soil and onto the surrounding areas.
3. Risk Level 1 dischargers shall implement good housekeeping for
vehicle storage and maintenance, which, at a minimum, shall consist of
the following:
a. Prevent oil, grease, or fuel to leak in to the ground, storm drains or
surface waters.
b. Place all equipment or vehicles, which are to be fueled, maintained
and stored in a designated area fitted with appropriate BMPs.
c. Clean leaks immediately and disposing of leaked materials
properly.
4. Risk Level 1 dischargers shall implement good housekeeping for
landscape materials, which, at a minimum, shall consist of the
following:
a. Contain stockpiled materials such as mulches and topsoil when
they are not actively being used.
b. Contain fertilizers and other landscape materials when they are not
actively being used.
c. Discontinue the application of any erodible landscape material
within 2 days before a forecasted rain event or during periods of
precipitation.
d. Apply erodible landscape material at quantities and application
rates according to manufacture recommendations or based on
written specifications by knowledgeable and experienced field
personnel.
e. Stack erodible landscape material on pallets and covering or
storing such materials when not being used or applied.
5. Risk Level 1 dischargers shall conduct an assessment and create a list
of potential pollutant sources and identify any areas of the site where
additional BMPs are necessary to reduce or prevent pollutants in storm
water discharges and authorized non-storm water discharges. This
potential pollutant list shall be kept with the SWPPP and shall identify
ATTACHMENT C
2009-0009-DWQ 4 September 2, 2009
all non-visible pollutants which are known, or should be known, to
occur on the construction site. At a minimum, when developing BMPs,
Risk Level 1 dischargers shall do the following:
a. Consider the quantity, physical characteristics (e.g., liquid, powder,
solid), and locations of each potential pollutant source handled,
produced, stored, recycled, or disposed of at the site.
b. Consider the degree to which pollutants associated with those
materials may be exposed to and mobilized by contact with storm
water.
c. Consider the direct and indirect pathways that pollutants may be
exposed to storm water or authorized non-storm water discharges.
This shall include an assessment of past spills or leaks, non-storm
water discharges, and discharges from adjoining areas.
d. Ensure retention of sampling, visual observation, and inspection
records.
e. Ensure effectiveness of existing BMPs to reduce or prevent
pollutants in storm water discharges and authorized non-storm
water discharges.
6. Risk Level 1 dischargers shall implement good housekeeping
measures on the construction site to control the air deposition of site
materials and from site operations. Such particulates can include, but
are not limited to, sediment, nutrients, trash, metals, bacteria, oil and
grease and organics.
C. Non-Storm Water Management
1. Risk Level 1 dischargers shall implement measures to control all non-
storm water discharges during construction.
2. Risk Level 1 dischargers shall wash vehicles in such a manner as to
prevent non-storm water discharges to surface waters or MS4
drainage systems.
3. Risk Level 1 dischargers shall clean streets in such a manner as to
prevent unauthorized non-storm water discharges from reaching
surface water or MS4 drainage systems.
ATTACHMENT C
2009-0009-DWQ 5 September 2, 2009
D. Erosion Control
1. Risk Level 1 dischargers shall implement effective wind erosion
control.
2. Risk Level 1 dischargers shall provide effective soil cover for inactive1
areas and all finished slopes, open space, utility backfill, and
completed lots.
3. Risk Level 1 dischargers shall limit the use of plastic materials when
more sustainable, environmentally friendly alternatives exist. Where
plastic materials are deemed necessary, the discharger shall consider
the use of plastic materials resistant to solar degradation.
E. Sediment Controls
1. Risk Level 1 dischargers shall establish and maintain effective
perimeter controls and stabilize all construction entrances and exits to
sufficiently control erosion and sediment discharges from the site.
2. On sites where sediment basins are to be used, Risk Level 1
dischargers shall, at minimum, design sediment basins according to
the method provided in CASQA’s Construction BMP Guidance
Handbook.
F. Run-on and Runoff Controls
Risk Level 1 dischargers shall effectively manage all run-on, all runoff
within the site and all runoff that discharges off the site. Run-on from off
site shall be directed away from all disturbed areas or shall collectively be
in compliance with the effluent limitations in this General Permit.
G. Inspection, Maintenance and Repair
1. Risk Level 1 dischargers shall ensure that all inspection, maintenance
repair and sampling activities at the project location shall be performed
or supervised by a Qualified SWPPP Practitioner (QSP) representing
the discharger. The QSP may delegate any or all of these activities to
an employee trained to do the task(s) appropriately, but shall ensure
adequate deployment.
2. Risk Level 1 dischargers shall perform weekly inspections and
observations, and at least once each 24-hour period during extended
1 Inactive areas of construction are areas of construction activity that have been disturbed and are not
scheduled to be re-disturbed for at least 14 days.
ATTACHMENT C
2009-0009-DWQ 6 September 2, 2009
storm events, to identify and record BMPs that need maintenance to
operate effectively, that have failed, or that could fail to operate as
intended. Inspectors shall be the QSP or be trained by the QSP.
3. Upon identifying failures or other shortcomings, as directed by the
QSP, Risk Level 1 dischargers shall begin implementing repairs or
design changes to BMPs within 72 hours of identification and complete
the changes as soon as possible.
4. For each inspection required, Risk Level 1 dischargers shall complete
an inspection checklist, using a form provided by the State Water
Board or Regional Water Board or in an alternative format.
5. Risk Level 1 dischargers shall ensure that checklists shall remain
onsite with the SWPPP and at a minimum, shall include:
a. Inspection date and date the inspection report was written.
b. Weather information, including presence or absence of
precipitation, estimate of beginning of qualifying storm event,
duration of event, time elapsed since last storm, and approximate
amount of rainfall in inches.
c. Site information, including stage of construction, activities
completed, and approximate area of the site exposed.
d. A description of any BMPs evaluated and any deficiencies noted.
e. If the construction site is safely accessible during inclement
weather, list the observations of all BMPs: erosion controls,
sediment controls, chemical and waste controls, and non-storm
water controls. Otherwise, list the results of visual inspections at all
relevant outfalls, discharge points, downstream locations and any
projected maintenance activities.
f. Report the presence of noticeable odors or of any visible sheen on
the surface of any discharges.
g. Any corrective actions required, including any necessary changes
to the SWPPP and the associated implementation dates.
h. Photographs taken during the inspection, if any.
i. Inspector’s name, title, and signature.
ATTACHMENT C
2009-0009-DWQ 7 September 2, 2009
H. Rain Event Action Plan
Not required for Risk Level 1 dischargers.
ATTACHMENT C
2009-0009-DWQ 8 September 2, 2009
I. Risk Level 1 Monitoring and Reporting Requirements
Table 1- Summary of Monitoring Requirements
Visual Inspections Sample Collection
Pre-storm
Event Risk
Level
Quarterly
Non-
storm
Water
Discharge
Baseline REAP
Daily
Storm
BMP
Post
Storm
Storm
Water
Discharge
Receiving
Water
1 X X X X
1. Construction Site Monitoring Program Requirements
a. Pursuant to Water Code Sections 13383 and 13267, all dischargers
subject to this General Permit shall develop and implement a
written site-specific Construction Site Monitoring Program (CSMP)
in accordance with the requirements of this Section. The CSMP
shall include all monitoring procedures and instructions, location
maps, forms, and checklists as required in this section. The CSMP
shall be developed prior to the commencement of construction
activities, and revised as necessary to reflect project revisions. The
CSMP shall be a part of the Storm Water Pollution Prevention Plan
(SWPPP), included as an appendix or separate SWPPP chapter.
b. Existing dischargers registered under the State Water Board Order
No. 99-08-DWQ shall make and implement necessary revisions to
their Monitoring Programs to reflect the changes in this General
Permit in a timely manner, but no later than July 1, 2010. Existing
dischargers shall continue to implement their existing Monitoring
Programs in compliance with State Water Board Order No. 99-08-
DWQ until the necessary revisions are completed according to the
schedule above.
c. When a change of ownership occurs for all or any portion of the
construction site prior to completion or final stabilization, the new
discharger shall comply with these requirements as of the date the
ownership change occurs.
2. Objectives
The CSMP shall be developed and implemented to address the
following objectives:
a. To demonstrate that the site is in compliance with the Discharge
Prohibitions;
ATTACHMENT C
2009-0009-DWQ 9 September 2, 2009
b. To determine whether non-visible pollutants are present at the
construction site and are causing or contributing to exceedances of
water quality objectives;
c. To determine whether immediate corrective actions, additional Best
Management Practice (BMP) implementation, or SWPPP revisions
are necessary to reduce pollutants in storm water discharges and
authorized non-storm water discharges; and
d. To determine whether BMPs included in the SWPPP are effective
in preventing or reducing pollutants in storm water discharges and
authorized non-storm water discharges.
3. Risk Level 1 - Visual Monitoring (Inspection) Requirements for
Qualifying Rain Events
a. Risk Level 1 dischargers shall visually observe (inspect) storm
water discharges at all discharge locations within two business
days (48 hours) after each qualifying rain event.
b. Risk Level 1 dischargers shall visually observe (inspect) the
discharge of stored or contained storm water that is derived from
and discharged subsequent to a qualifying rain event producing
precipitation of ½ inch or more at the time of discharge. Stored or
contained storm water that will likely discharge after operating
hours due to anticipated precipitation shall be observed prior to the
discharge during operating hours.
c. Risk Level 1 dischargers shall conduct visual observations
(inspections) during business hours only.
d. Risk Level 1 dischargers shall record the time, date and rain gauge
reading of all qualifying rain events.
e. Within 2 business days (48 hours) prior to each qualifying rain
event, Risk Level 1 dischargers shall visually observe (inspect):
i. All storm water drainage areas to identify any spills, leaks, or
uncontrolled pollutant sources. If needed, the discharger shall
implement appropriate corrective actions.
ii. All BMPs to identify whether they have been properly
implemented in accordance with the SWPPP. If needed, the
discharger shall implement appropriate corrective actions.
ATTACHMENT C
2009-0009-DWQ 10 September 2, 2009
iii. Any storm water storage and containment areas to detect leaks
and ensure maintenance of adequate freeboard.
f. For the visual observations (inspections) described in e.i and e.iii
above, Risk Level 1 dischargers shall observe the presence or
absence of floating and suspended materials, a sheen on the
surface, discolorations, turbidity, odors, and source(s) of any
observed pollutants.
g. Within two business days (48 hours) after each qualifying rain
event, Risk Level 1 dischargers shall conduct post rain event visual
observations (inspections) to (1) identify whether BMPs were
adequately designed, implemented, and effective, and (2) identify
additional BMPs and revise the SWPPP accordingly.
h. Risk Level 1 dischargers shall maintain on-site records of all visual
observations (inspections), personnel performing the observations,
observation dates, weather conditions, locations observed, and
corrective actions taken in response to the observations.
4. Risk Level 1 – Visual Observation Exemptions
a. Risk Level 1 dischargers shall be prepared to conduct visual
observation (inspections) until the minimum requirements of
Section I.3 above are completed. Risk Level 1 dischargers are not
required to conduct visual observation (inspections) under the
following conditions:
i. During dangerous weather conditions such as flooding and
electrical storms.
ii. Outside of scheduled site business hours.
b. If no required visual observations (inspections) are collected due to
these exceptions, Risk Level 1 dischargers shall include an
explanation in their SWPPP and in the Annual Report documenting
why the visual observations (inspections) were not conducted.
5. Risk Level 1 – Monitoring Methods
Risk Level 1 dischargers shall include a description of the visual
observation locations, visual observation procedures, and visual
observation follow-up and tracking procedures in the CSMP.
6. Risk Level 1 – Non-Storm Water Discharge Monitoring
Requirements
ATTACHMENT C
2009-0009-DWQ 11 September 2, 2009
a. Visual Monitoring Requirements:
i. Risk Level 1 dischargers shall visually observe (inspect) each
drainage area for the presence of (or indications of prior)
unauthorized and authorized non-storm water discharges and
their sources.
ii. Risk Level 1 dischargers shall conduct one visual observation
(inspection) quarterly in each of the following periods: January-
March, April-June, July-September, and October-December.
Visual observation (inspections) are only required during
daylight hours (sunrise to sunset).
iii. Risk Level 1 dischargers shall ensure that visual observations
(inspections) document the presence or evidence of any non-
storm water discharge (authorized or unauthorized), pollutant
characteristics (floating and suspended material, sheen,
discoloration, turbidity, odor, etc.), and source. Risk Level 1
dischargers shall maintain on-site records indicating the
personnel performing the visual observation (inspections), the
dates and approximate time each drainage area and non-storm
water discharge was observed, and the response taken to
eliminate unauthorized non-storm water discharges and to
reduce or prevent pollutants from contacting non-storm water
discharges.
7. Risk Level 1 – Non-Visible Pollutant Monitoring Requirements
a. Risk Level 1 dischargers shall collect one or more samples during
any breach, malfunction, leakage, or spill observed during a visual
inspection which could result in the discharge of pollutants to
surface waters that would not be visually detectable in storm water.
b. Risk Level 1 dischargers shall ensure that water samples are large
enough to characterize the site conditions.
c. Risk Level 1 dischargers shall collect samples at all discharge
locations that can be safely accessed.
d. Risk Level 1 dischargers shall collect samples during the first two
hours of discharge from rain events that occur during business
hours and which generate runoff.
e. Risk Level 1 dischargers shall analyze samples for all non-visible
pollutant parameters (if applicable) - parameters indicating the
ATTACHMENT C
2009-0009-DWQ 12 September 2, 2009
presence of pollutants identified in the pollutant source assessment
required (Risk Level 1 dischargers shall modify their CSMPs to
address these additional parameters in accordance with any
updated SWPPP pollutant source assessment).
f. Risk Level 1 dischargers shall collect a sample of storm water that
has not come in contact with the disturbed soil or the materials
stored or used on-site (uncontaminated sample) for comparison
with the discharge sample.
g. Risk Level 1 dischargers shall compare the uncontaminated sample
to the samples of discharge using field analysis or through
laboratory analysis.2
h. Risk Level 1 dischargers shall keep all field /or analytical data in the
SWPPP document.
8. Risk Level 1 – Particle Size Analysis for Project Risk Justification
Risk Level 1 dischargers justifying an alternative project risk shall
report a soil particle size analysis used to determine the RUSLE K-
Factor. ASTM D-422 (Standard Test Method for Particle-Size Analysis
of Soils), as revised, shall be used to determine the percentages of
sand, very fine sand, silt, and clay on the site.
9. Risk Level 1 – Records
Risk Level 1 dischargers shall retain records of all storm water
monitoring information and copies of all reports (including Annual
Reports) for a period of at least three years. Risk Level 1 dischargers
shall retain all records on-site while construction is ongoing. These
records include:
a. The date, place, time of facility inspections, sampling, visual
observation (inspections), and/or measurements, including
precipitation.
b. The individual(s) who performed the facility inspections, sampling,
visual observation (inspections), and or measurements.
c. The date and approximate time of analyses.
d. The individual(s) who performed the analyses.
2 For laboratory analysis, all sampling, sample preservation, and analyses must be conducted according to
test procedures under 40 CFR Part 136. Field discharge samples shall be collected and analyzed according
to the specifications of the manufacturer of the sampling devices employed.
ATTACHMENT C
2009-0009-DWQ 13 September 2, 2009
e. A summary of all analytical results from the last three years, the
method detection limits and reporting units, and the analytical
techniques or methods used.
f. Rain gauge readings from site inspections.
g. Quality assurance/quality control records and results.
h. Non-storm water discharge inspections and visual observation
(inspections) and storm water discharge visual observation records
(see Sections I.3 and I.6 above).
i. Visual observation and sample collection exception records (see
Section I.4 above).
j. The records of any corrective actions and follow-up activities that
resulted from analytical results, visual observation (inspections), or
inspections.
ATTACHMENT D
2009-0009-DWQ 1 September 2, 2009
ATTACHMENT D
RISK LEVEL 2 REQUIREMENTS
A. Effluent Standards
[These requirements are the same as those in the General Permit order.]
1. Narrative – Risk Level 2 dischargers shall comply with the narrative
effluent standards listed below:
a. Storm water discharges and authorized non-storm water
discharges regulated by this General Permit shall not contain a
hazardous substance equal to or in excess of reportable quantities
established in 40 C.F.R. §§ 117.3 and 302.4, unless a separate
NPDES Permit has been issued to regulate those discharges.
b. Dischargers shall minimize or prevent pollutants in storm water
discharges and authorized non-storm water discharges through the
use of controls, structures, and management practices that achieve
BAT for toxic and non-conventional pollutants and BCT for
conventional pollutants.
2. Numeric – Risk level 2 dischargers are subject to a pH NAL of 6.5-8.5,
and a turbidity NAL of 250 NTU.
B. Good Site Management "Housekeeping"
1. Risk Level 2 dischargers shall implement good site management (i.e.,
"housekeeping") measures for construction materials that could
potentially be a threat to water quality if discharged. At a minimum,
Risk Level 2 dischargers shall implement the following good
housekeeping measures:
a. Conduct an inventory of the products used and/or expected to be
used and the end products that are produced and/or expected to be
produced. This does not include materials and equipment that are
designed to be outdoors and exposed to environmental conditions
(i.e. poles, equipment pads, cabinets, conductors, insulators,
bricks, etc.).
b. Cover and berm loose stockpiled construction materials that are not
actively being used (i.e. soil, spoils, aggregate, fly-ash, stucco,
hydrated lime, etc.).
ATTACHMENT D
2009-0009-DWQ 2 September 2, 2009
c. Store chemicals in watertight containers (with appropriate
secondary containment to prevent any spillage or leakage) or in a
storage shed (completely enclosed).
d. Minimize exposure of construction materials to precipitation. This
does not include materials and equipment that are designed to be
outdoors and exposed to environmental conditions (i.e. poles,
equipment pads, cabinets, conductors, insulators, bricks, etc.).
e. Implement BMPs to prevent the off-site tracking of loose
construction and landscape materials.
2. Risk Level 2 dischargers shall implement good housekeeping
measures for waste management, which, at a minimum, shall consist
of the following:
a. Prevent disposal of any rinse or wash waters or materials on
impervious or pervious site surfaces or into the storm drain system.
b. Ensure the containment of sanitation facilities (e.g., portable toilets)
to prevent discharges of pollutants to the storm water drainage
system or receiving water.
c. Clean or replace sanitation facilities and inspecting them regularly
for leaks and spills.
d. Cover waste disposal containers at the end of every business day
and during a rain event.
e. Prevent discharges from waste disposal containers to the storm
water drainage system or receiving water.
f. Contain and securely protect stockpiled waste material from wind
and rain at all times unless actively being used.
g. Implement procedures that effectively address hazardous and non-
hazardous spills.
h. Develop a spill response and implementation element of the
SWPPP prior to commencement of construction activities. The
SWPPP shall require:
i. Equipment and materials for cleanup of spills shall be available
on site and that spills and leaks shall be cleaned up immediately
and disposed of properly.
ATTACHMENT D
2009-0009-DWQ 3 September 2, 2009
ii. Appropriate spill response personnel are assigned and trained.
i. Ensure the containment of concrete washout areas and other
washout areas that may contain additional pollutants so there is no
discharge into the underlying soil and onto the surrounding areas.
3. Risk Level 2 dischargers shall implement good housekeeping for
vehicle storage and maintenance, which, at a minimum, shall consist of
the following:
a. Prevent oil, grease, or fuel to leak in to the ground, storm drains or
surface waters.
b. Place all equipment or vehicles, which are to be fueled, maintained
and stored in a designated area fitted with appropriate BMPs.
c. Clean leaks immediately and disposing of leaked materials
properly.
4. Risk Level 2 dischargers shall implement good housekeeping for
landscape materials, which, at a minimum, shall consist of the
following:
a. Contain stockpiled materials such as mulches and topsoil when
they are not actively being used.
b. Contain all fertilizers and other landscape materials when they are
not actively being used.
c. Discontinue the application of any erodible landscape material
within 2 days before a forecasted rain event or during periods of
precipitation.
d. Apply erodible landscape material at quantities and application
rates according to manufacture recommendations or based on
written specifications by knowledgeable and experienced field
personnel.
e. Stack erodible landscape material on pallets and covering or
storing such materials when not being used or applied.
5. Risk Level 2 dischargers shall conduct an assessment and create a list
of potential pollutant sources and identify any areas of the site where
additional BMPs are necessary to reduce or prevent pollutants in storm
water discharges and authorized non-storm water discharges. This
potential pollutant list shall be kept with the SWPPP and shall identify
ATTACHMENT D
2009-0009-DWQ 4 September 2, 2009
all non-visible pollutants which are known, or should be known, to
occur on the construction site. At a minimum, when developing BMPs,
Risk Level 2 dischargers shall do the following:
a. Consider the quantity, physical characteristics (e.g., liquid, powder,
solid), and locations of each potential pollutant source handled,
produced, stored, recycled, or disposed of at the site.
b. Consider the degree to which pollutants associated with those
materials may be exposed to and mobilized by contact with storm
water.
c. Consider the direct and indirect pathways that pollutants may be
exposed to storm water or authorized non-storm water discharges.
This shall include an assessment of past spills or leaks, non-storm
water discharges, and discharges from adjoining areas.
d. Ensure retention of sampling, visual observation, and inspection
records.
e. Ensure effectiveness of existing BMPs to reduce or prevent
pollutants in storm water discharges and authorized non-storm
water discharges.
6. Risk Level 2 dischargers shall implement good housekeeping
measures on the construction site to control the air deposition of site
materials and from site operations. Such particulates can include, but
are not limited to, sediment, nutrients, trash, metals, bacteria, oil and
grease and organics.
7. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
document all housekeeping BMPs in the SWPPP and REAP(s) in
accordance with the nature and phase of the construction project.
Construction phases at traditional land development projects include
Grading and Land Development Phase, Streets and Utilities, or
Vertical Construction for traditional land development projects.
C. Non-Storm Water Management
1. Risk Level 2 dischargers shall implement measures to control all non-
storm water discharges during construction.
2. Risk Level 2 dischargers shall wash vehicles in such a manner as to
prevent non-storm water discharges to surface waters or MS4
drainage systems.
ATTACHMENT D
2009-0009-DWQ 5 September 2, 2009
3. Risk Level 2 dischargers shall clean streets in such a manner as to
prevent unauthorized non-storm water discharges from reaching
surface water or MS4 drainage systems.
D. Erosion Control
1. Risk Level 2 dischargers shall implement effective wind erosion
control.
2. Risk Level 2 dischargers shall provide effective soil cover for inactive1
areas and all finished slopes, open space, utility backfill, and
completed lots.
3. Risk Level 2 dischargers shall limit the use of plastic materials when
more sustainable, environmentally friendly alternatives exist. Where
plastic materials are deemed necessary, the discharger shall consider
the use of plastic materials resistant to solar degradation.
E. Sediment Controls
1. Risk Level 2 dischargers shall establish and maintain effective
perimeter controls and stabilize all construction entrances and exits to
sufficiently control erosion and sediment discharges from the site.
2. On sites where sediment basins are to be used, Risk Level 2
dischargers shall, at minimum, design sediment basins according to
the method provided in CASQA’s Construction BMP Guidance
Handbook.
3. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
implement appropriate erosion control BMPs (runoff control and soil
stabilization) in conjunction with sediment control BMPs for areas
under active2 construction.
4. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
apply linear sediment controls along the toe of the slope, face of the
slope, and at the grade breaks of exposed slopes to comply with sheet
flow lengths3 in accordance with Table 1.
Table 1 - Critical Slope/Sheet Flow Length Combinations
Slope Percentage Sheet flow length not
1 Inactive areas of construction are areas of construction activity that have been disturbed and are not
scheduled to be re-disturbed for at least 14 days. 2 Active areas of construction are areas undergoing land surface disturbance. This includes construction
activity during the preliminary stage, mass grading stage, streets and utilities stage and the vertical
construction stage. 3 Sheet flow length is the length that shallow, low velocity flow travels across a site.
ATTACHMENT D
2009-0009-DWQ 6 September 2, 2009
to exceed
0-25% 20 feet
25-50% 15 feet
Over 50% 10 feet
5. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
ensure that construction activity traffic to and from the project is limited
to entrances and exits that employ effective controls to prevent offsite
tracking of sediment.
6. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
ensure that all storm drain inlets and perimeter controls, runoff control
BMPs, and pollutant controls at entrances and exits (e.g. tire washoff
locations) are maintained and protected from activities that reduce their
effectiveness.
7. Additional Risk Level 2 Requirement: Risk Level 2 dischargers shall
inspect on a daily basis all immediate access roads daily. At a
minimum daily (when necessary) and prior to any rain event, the
discharger shall remove any sediment or other construction activity-
related materials that are deposited on the roads (by vacuuming or
sweeping).
F. Run-on and Run-off Controls
Risk Level 2 dischargers shall effectively manage all run-on, all runoff
within the site and all runoff that discharges off the site. Run-on from off
site shall be directed away from all disturbed areas or shall collectively be
in compliance with the effluent limitations in this General Permit.
G. Inspection, Maintenance and Repair
1. Risk Level 2 dischargers shall ensure that all inspection, maintenance
repair and sampling activities at the project location shall be performed
or supervised by a Qualified SWPPP Practitioner (QSP) representing
the discharger. The QSP may delegate any or all of these activities to
an employee appropriately trained to do the task(s).
2. Risk Level 2 dischargers shall perform weekly inspections and
observations, and at least once each 24-hour period during extended
storm events, to identify and record BMPs that need maintenance to
operate effectively, that have failed, or that could fail to operate as
intended. Inspectors shall be the QSP or be trained by the QSP.
3. Upon identifying failures or other shortcomings, as directed by the
QSP, Risk Level 2 dischargers shall begin implementing repairs or
ATTACHMENT D
2009-0009-DWQ 7 September 2, 2009
design changes to BMPs within 72 hours of identification and complete
the changes as soon as possible.
4. For each inspection required, Risk Level 2 dischargers shall complete
an inspection checklist, using a form provided by the State Water
Board or Regional Water Board or in an alternative format.
5. Risk Level 2 dischargers shall ensure that checklists shall remain
onsite with the SWPPP and at a minimum, shall include:
a. Inspection date and date the inspection report was written.
b. Weather information, including presence or absence of
precipitation, estimate of beginning of qualifying storm event,
duration of event, time elapsed since last storm, and approximate
amount of rainfall in inches.
c. Site information, including stage of construction, activities
completed, and approximate area of the site exposed.
d. A description of any BMPs evaluated and any deficiencies noted.
e. If the construction site is safely accessible during inclement
weather, list the observations of all BMPs: erosion controls,
sediment controls, chemical and waste controls, and non-storm
water controls. Otherwise, list the results of visual inspections at all
relevant outfalls, discharge points, downstream locations and any
projected maintenance activities.
f. Report the presence of noticeable odors or of any visible sheen on
the surface of any discharges.
g. Any corrective actions required, including any necessary changes
to the SWPPP and the associated implementation dates.
h. Photographs taken during the inspection, if any.
i. Inspector’s name, title, and signature.
H. Rain Event Action Plan
1. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP develop a Rain Event Action Plan (REAP) 48 hours prior to any
likely precipitation event. A likely precipitation event is any weather
pattern that is forecast to have a 50% or greater probability of
producing precipitation in the project area. The discharger shall
ATTACHMENT D
2009-0009-DWQ 8 September 2, 2009
ensure a QSP obtain a printed copy of precipitation forecast
information from the National Weather Service Forecast Office (e.g., by
entering the zip code of the project’s location at
http://www.srh.noaa.gov/forecast).
2. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP develop the REAPs for all phases of construction (i.e., Grading
and Land Development, Streets and Utilities, Vertical Construction,
Final Landscaping and Site Stabilization).
3. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP ensure that the REAP include, at a minimum, the following site
information:
a. Site Address
b. Calculated Risk Level (2 or 3)
c. Site Storm Water Manager Information including the name,
company, and 24-hour emergency telephone number
d. Erosion and Sediment Control Provider information including the
name, company, and 24-hour emergency telephone number
e. Storm Water Sampling Agent information including the name,
company, and 24-hour emergency telephone number
4. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP include in the REAP, at a minimum, the following project phase
information:
a. Activities associated with each construction phase
b. Trades active on the construction site during each construction
phase
c. Trade contractor information
d. Suggested actions for each project phase
5. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP develop additional REAPs for project sites where construction
activities are indefinitely halted or postponed (Inactive Construction).
At a minimum, Inactive Construction REAPs must include:
a. Site Address
b. Calculated Risk Level (2 or 3)
c. Site Storm Water Manager Information including the name,
company, and 24-hour emergency telephone number
d. Erosion and Sediment Control Provider information including the
name, company, and 24-hour emergency telephone number
e. Storm Water Sampling Agent information including the name,
company, and 24-hour emergency telephone number
ATTACHMENT D
2009-0009-DWQ 9 September 2, 2009
f. Trades active on site during Inactive Construction
g. Trade contractor information
h. Suggested actions for inactive construction sites
6. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP begin implementation and make the REAP available onsite no
later than 24 hours prior to the likely precipitation event.
7. Additional Risk Level 2 Requirement: The discharger shall ensure a
QSP maintain onsite a paper copy of each REAP onsite in compliance
with the record retention requirements of the Special Provisions in this
General Permit.
ATTACHMENT D
2009-0009-DWQ 10 September 2, 2009
I. Risk Level 2 Monitoring and Reporting Requirements
Table 2- Summary of Monitoring Requirements
Visual Inspections Sample Collection
Pre-storm
Event Risk
Level
Quarterly
Non-
storm
Water
Discharge
Baseline REAP
Daily
Storm
BMP
Post
Storm
Storm
Water
Discharge
Receiving
Water
2 X X X X X X
1. Construction Site Monitoring Program Requirements
a. Pursuant to Water Code Sections 13383 and 13267, all dischargers
subject to this General Permit shall develop and implement a
written site-specific Construction Site Monitoring Program (CSMP)
in accordance with the requirements of this Section. The CSMP
shall include all monitoring procedures and instructions, location
maps, forms, and checklists as required in this section. The CSMP
shall be developed prior to the commencement of construction
activities, and revised as necessary to reflect project revisions. The
CSMP shall be a part of the Storm Water Pollution Prevention Plan
(SWPPP), included as an appendix or separate SWPPP chapter.
b. Existing dischargers registered under the State Water Board Order
No. 99-08-DWQ shall make and implement necessary revisions to
their Monitoring Program to reflect the changes in this General
Permit in a timely manner, but no later than July 1, 2010. Existing
dischargers shall continue to implement their existing Monitoring
Programs in compliance with State Water Board Order No. 99-08-
DWQ until the necessary revisions are completed according to the
schedule above.
c. When a change of ownership occurs for all or any portion of the
construction site prior to completion or final stabilization, the new
discharger shall comply with these requirements as of the date the
ownership change occurs.
2. Objectives
The CSMP shall be developed and implemented to address the
following objectives:
ATTACHMENT D
2009-0009-DWQ 11 September 2, 2009
a. To demonstrate that the site is in compliance with the Discharge
Prohibitions and applicable Numeric Action Levels (NALs)/Numeric
Effluent Limitations (NELs) of this General Permit.
b. To determine whether non-visible pollutants are present at the
construction site and are causing or contributing to exceedances of
water quality objectives.
c. To determine whether immediate corrective actions, additional Best
Management Practice (BMP) implementation, or SWPPP revisions
are necessary to reduce pollutants in storm water discharges and
authorized non-storm water discharges.
d. To determine whether BMPs included in the SWPPP/Rain Event
Action Plan (REAP) are effective in preventing or reducing
pollutants in storm water discharges and authorized non-storm
water discharges.
3. Risk Level 2 – Visual Monitoring (Inspection) Requirements for
Qualifying Rain Events
a. Risk Level 2 dischargers shall visually observe (inspect) storm
water discharges at all discharge locations within two business
days (48 hours) after each qualifying rain event.
b. Risk Level 2 dischargers shall visually observe (inspect) the
discharge of stored or contained storm water that is derived from
and discharged subsequent to a qualifying rain event producing
precipitation of ½ inch or more at the time of discharge. Stored or
contained storm water that will likely discharge after operating
hours due to anticipated precipitation shall be observed prior to the
discharge during operating hours.
c. Risk Level 2 dischargers shall conduct visual observations
(inspections) during business hours only.
d. Risk Level 2 dischargers shall record the time, date and rain gauge
reading of all qualifying rain events.
e. Within 2 business days (48 hours) prior to each qualifying rain
event, Risk Level 2 dischargers shall visually observe (inspect):
i. all storm water drainage areas to identify any spills, leaks, or
uncontrolled pollutant sources. If needed, the discharger shall
implement appropriate corrective actions.
ATTACHMENT D
2009-0009-DWQ 12 September 2, 2009
ii. all BMPs to identify whether they have been properly
implemented in accordance with the SWPPP/REAP. If needed,
the discharger shall implement appropriate corrective actions.
iii. any storm water storage and containment areas to detect leaks
and ensure maintenance of adequate freeboard.
f. For the visual observations (inspections) described in c.i and c.iii
above, Risk Level 2 dischargers shall observe the presence or
absence of floating and suspended materials, a sheen on the
surface, discolorations, turbidity, odors, and source(s) of any
observed pollutants.
g. Within two business days (48 hours) after each qualifying rain
event, Risk Level 2 dischargers shall conduct post rain event visual
observations (inspections) to (1) identify whether BMPs were
adequately designed, implemented, and effective, and (2) identify
additional BMPs and revise the SWPPP accordingly.
h. Risk Level 2 dischargers shall maintain on-site records of all visual
observations (inspections), personnel performing the observations,
observation dates, weather conditions, locations observed, and
corrective actions taken in response to the observations.
4. Risk Level 2 – Water Quality Sampling and Analysis
a. Risk Level 2 dischargers shall collect storm water grab samples
from sampling locations, as defined in Section I.5. The storm water
grab sample(s) obtained shall be representative of the flow and
characteristics of the discharge.
b. At minimum, Risk Level 2 dischargers shall collect 3 samples per
day of the qualifying event.
c. Risk Level 2 dischargers shall ensure that the grab samples
collected of stored or contained storm water are from discharges
subsequent to a qualifying rain event (producing precipitation of
½ inch or more at the time of discharge).
Storm Water Effluent Monitoring Requirements
d. Risk Level 2 dischargers shall analyze their effluent samples for:
i. pH and turbidity.
ATTACHMENT D
2009-0009-DWQ 13 September 2, 2009
ii. Any additional parameters for which monitoring is required by
the Regional Water Board.
5. Risk Level 2 – Storm Water Discharge Water Quality Sampling
Locations
Effluent Sampling Locations
a. Risk Level 2 dischargers shall perform sampling and analysis of
storm water discharges to characterize discharges associated with
construction activity from the entire project disturbed area.
b. Risk Level 2 dischargers shall collect effluent samples at all
discharge points where storm water is discharged off-site.
c. Risk Level 2 dischargers shall ensure that storm water discharge
collected and observed represent4 the effluent in each drainage
area based on visual observation of the water and upstream
conditions.
d. Risk Level 2 dischargers shall monitor and report site run-on from
surrounding areas if there is reason to believe run-on may
contribute to an exceedance of NALs or NELs.
e. Risk Level 2 dischargers who deploy an ATS on their site, or a
portion on their site, shall collect ATS effluent samples and
measurements from the discharge pipe or another location
representative of the nature of the discharge.
f. Risk Level 2 dischargers shall select analytical test methods from
the list provided in Table 3 below.
g. All storm water sample collection preservation and handling shall
be conducted in accordance with Section I.7 “Storm Water Sample
Collection and Handling Instructions” below.
6. Risk Level 2 – Visual Observation and Sample Collection
Exemptions
a. Risk Level 2 dischargers shall be prepared to collect samples and
conduct visual observation (inspections) until the minimum
requirements of Sections I.3 and I.4 above are completed. Risk
4 For example, if there has been concrete work recently in an area, or drywall scrap is exposed to the rain, a
pH sample shall be taken of drainage from the relevant work area. Similarly, if sediment laden water is
flowing through some parts of a silt fence, samples shall be taken of the sediment-laden water even if most
water flowing through the fence is clear.
ATTACHMENT D
2009-0009-DWQ 14 September 2, 2009
Level 2 dischargers are not required to physically collect samples
or conduct visual observation (inspections) under the following
conditions:
i. During dangerous weather conditions such as flooding and
electrical storms.
ii. Outside of scheduled site business hours.
b. If no required samples or visual observation (inspections) are
collected due to these exceptions, Risk Level 2 dischargers shall
include an explanation in their SWPPP and in the Annual Report
documenting why the sampling or visual observation (inspections)
were not conducted.
7. Risk Level 2 – Storm Water Sample Collection and Handling
Instructions
a. Risk Level 2 dischargers shall refer to Table 3 below for test
methods, detection limits, and reporting units.
b. Risk Level 2 dischargers shall ensure that testing laboratories will
receive samples within 48 hours of the physical sampling (unless
otherwise required by the laboratory), and shall use only the
sample containers provided by the laboratory to collect and store
samples.
c. Risk Level 2 dischargers shall designate and train personnel to
collect, maintain, and ship samples in accordance with the Surface
Water Ambient Monitoring Program’s (SWAMP) 2008 Quality
Assurance Program Plan (QAPrP).5
8. Risk Level 2 – Monitoring Methods
a. Risk Level 2 dischargers shall include a description of the following
items in the CSMP:
i. Visual observation locations, visual observation procedures, and
visual observation follow-up and tracking procedures.
ii. Sampling locations, and sample collection and handling
procedures. This shall include detailed procedures for sample
5 Additional information regarding SWAMP’s QAPrP and QAMP can be found at
http://www.waterboards.ca.gov/water_issues/programs/swamp/.
QAPrP:http://www.waterboards.ca.gov/water_issues/programs/swamp/docs/qapp/swamp_qapp_master090
108a.pdf.
QAMP: http://www.waterboards.ca.gov/water_issues/programs/swamp/qamp.shtml.
ATTACHMENT D
2009-0009-DWQ 15 September 2, 2009
collection, storage, preservation, and shipping to the testing lab
to assure that consistent quality control and quality assurance is
maintained. Dischargers shall attach to the monitoring program
an example Chain of Custody form used when handling and
shipping samples.
iii. Identification of the analytical methods and related method
detection limits (if applicable) for each parameter required in
Section I.4 above.
b. Risk Level 2 dischargers shall ensure that all sampling and sample
preservation are in accordance with the current edition of "Standard
Methods for the Examination of Water and Wastewater" (American
Public Health Association). All monitoring instruments and
equipment (including a discharger’s own field instruments for
measuring pH and turbidity) should be calibrated and maintained in
accordance with manufacturers' specifications to ensure accurate
measurements. Risk Level 2 dischargers shall ensure that all
laboratory analyses are conducted according to test procedures
under 40 CFR Part 136, unless other test procedures have been
specified in this General Permit or by the Regional Water Board.
With the exception of field analysis conducted by the discharger for
turbidity and pH, all analyses should be sent to and conducted at a
laboratory certified for such analyses by the State Department of
Health Services. Risk Level 2 dischargers shall conduct their own
field analysis of pH and may conduct their own field analysis of
turbidity if the discharger has sufficient capability (qualified and
trained employees, properly calibrated and maintained field
instruments, etc.) to adequately perform the field analysis.
9. Risk Level 2 – Analytical Methods
a. Risk Level 2 dischargers shall refer to Table 3 below for test
methods, detection limits, and reporting units.
b. pH: Risk Level 2 dischargers shall perform pH analysis on-site with
a calibrated pH meter or a pH test kit. Risk Level 2 dischargers
shall record pH monitoring results on paper and retain these
records in accordance with Section I.14, below.
c. Turbidity: Risk Level 2 dischargers shall perform turbidity analysis
using a calibrated turbidity meter (turbidimeter), either on-site or at
an accredited lab. Acceptable test methods include Standard
Method 2130 or USEPA Method 180.1. The results will be
recorded in the site log book in Nephelometric Turbidity Units
(NTU).
ATTACHMENT D
2009-0009-DWQ 16 September 2, 2009
10. Risk Level 2 - Non-Storm Water Discharge Monitoring
Requirements
a. Visual Monitoring Requirements:
i. Risk Level 2 dischargers shall visually observe (inspect) each
drainage area for the presence of (or indications of prior)
unauthorized and authorized non-storm water discharges and
their sources.
ii. Risk Level 2 dischargers shall conduct one visual observation
(inspection) quarterly in each of the following periods: January-
March, April-June, July-September, and October-December.
Visual observation (inspections) are only required during
daylight hours (sunrise to sunset).
iii. Risk Level 2 dischargers shall ensure that visual observations
(inspections) document the presence or evidence of any non-
storm water discharge (authorized or unauthorized), pollutant
characteristics (floating and suspended material, sheen,
discoloration, turbidity, odor, etc.), and source. Risk Level 2
dischargers shall maintain on-site records indicating the
personnel performing the visual observation (inspections), the
dates and approximate time each drainage area and non-storm
water discharge was observed, and the response taken to
eliminate unauthorized non-storm water discharges and to
reduce or prevent pollutants from contacting non-storm water
discharges.
b. Effluent Sampling Locations:
i. Risk Level 2 dischargers shall sample effluent at all discharge
points where non-storm water and/or authorized non-storm
water is discharged off-site.
ii. Risk Level 2 dischargers shall send all non-storm water sample
analyses to a laboratory certified for such analyses by the State
Department of Health Services.
iii. Risk Level 2 dischargers shall monitor and report run-on from
surrounding areas if there is reason to believe run-on may
contribute to an exceedance of NALs.
11. Risk Level 2 – Non-Visible Pollutant Monitoring Requirements
ATTACHMENT D
2009-0009-DWQ 17 September 2, 2009
a. Risk Level 2 dischargers shall collect one or more samples during
any breach, malfunction, leakage, or spill observed during a visual
inspection which could result in the discharge of pollutants to
surface waters that would not be visually detectable in storm water.
b. Risk Level 2 dischargers shall ensure that water samples are large
enough to characterize the site conditions.
c. Risk Level 2 dischargers shall collect samples at all discharge
locations that can be safely accessed.
d. Risk Level 2 dischargers shall collect samples during the first two
hours of discharge from rain events that occur during business
hours and which generate runoff.
e. Risk Level 2 dischargers shall analyze samples for all non-visible
pollutant parameters (if applicable) - parameters indicating the
presence of pollutants identified in the pollutant source assessment
required (Risk Level 2 dischargers shall modify their CSMPs to
address these additional parameters in accordance with any
updated SWPPP pollutant source assessment).
f. Risk Level 2 dischargers shall collect a sample of storm water that
has not come in contact with the disturbed soil or the materials
stored or used on-site (uncontaminated sample) for comparison
with the discharge sample.
g. Risk Level 2 dischargers shall compare the uncontaminated sample
to the samples of discharge using field analysis or through
laboratory analysis.6
h. Risk Level 2 dischargers shall keep all field /or analytical data in the
SWPPP document.
12. Risk Level 2 – Watershed Monitoring Option
Risk Level 2 dischargers who are part of a qualified regional
watershed-based monitoring program may be eligible for relief from the
requirements in Sections I.5. The Regional Water Board may approve
proposals to substitute an acceptable watershed-based monitoring
program by determining if the watershed-based monitoring program
6 For laboratory analysis, all sampling, sample preservation, and analyses must be conducted
according to test procedures under 40 CFR Part 136. Field discharge samples shall be collected
and analyzed according to the specifications of the manufacturer of the sampling devices
employed.
ATTACHMENT D
2009-0009-DWQ 18 September 2, 2009
will provide substantially similar monitoring information in evaluating
discharger compliance with the requirements of this General Permit.
13. Risk Level 2 – Particle Size Analysis for Project Risk Justification
Risk Level 2 dischargers justifying an alternative project risk shall
report a soil particle size analysis used to determine the RUSLE
K-Factor. ASTM D-422 (Standard Test Method for Particle-Size
Analysis of Soils), as revised, shall be used to determine the
percentages of sand, very fine sand, silt, and clay on the site.
14. Risk Level 2 – Records
Risk Level 2 dischargers shall retain records of all storm water
monitoring information and copies of all reports (including Annual
Reports) for a period of at least three years. Risk Level 2 dischargers
shall retain all records on-site while construction is ongoing. These
records include:
a. The date, place, time of facility inspections, sampling, visual
observation (inspections), and/or measurements, including
precipitation.
b. The individual(s) who performed the facility inspections, sampling,
visual observation (inspections), and or measurements.
c. The date and approximate time of analyses.
d. The individual(s) who performed the analyses.
e. A summary of all analytical results from the last three years, the
method detection limits and reporting units, the analytical
techniques or methods used, and the chain of custody forms.
f. Rain gauge readings from site inspections;
g. Quality assurance/quality control records and results.
h. Non-storm water discharge inspections and visual observation
(inspections) and storm water discharge visual observation records
(see Sections I.3 and I.10 above).
i. Visual observation and sample collection exception records (see
Section I.6 above).
ATTACHMENT D
2009-0009-DWQ 19 September 2, 2009
j. The records of any corrective actions and follow-up activities that
resulted from analytical results, visual observation (inspections), or
inspections.
15. Risk Level 2 – NAL Exceedance Report
a. In the event that any effluent sample exceeds an applicable NAL,
Risk Level 2 dischargers shall electronically submit all storm event
sampling results to the State Water Board no later than 10 days
after the conclusion of the storm event. The Regional Boards have
the authority to require the submittal of an NAL Exceedance
Report.
b. Risk Level 2 dischargers shall certify each NAL Exceedance Report
in accordance with the Special Provisions for Construction Activity.
c. Risk Level 2 dischargers shall retain an electronic or paper copy of
each NAL Exceedance Report for a minimum of three years after
the date the annual report is filed.
d. Risk Level 2 dischargers shall include in the NAL Exceedance
Report:
i. The analytical method(s), method reporting unit(s), and method
detection limit(s) of each analytical parameter (analytical results
that are less than the method detection limit shall be reported as
“less than the method detection limit”).
ii. The date, place, time of sampling, visual observation
(inspections), and/or measurements, including precipitation.
iii. A description of the current BMPs associated with the effluent
sample that exceeded the NAL and the proposed corrective
actions taken.
ATTACHMENT D 2009-0009-DWQ 20 September 2, 2009 Table 3 – Risk Level 2 Test Methods, Detection Limits, Reporting Units and Applicable NALs/NELs Parameter Test Method / Protocol Discharge Type Min. Detection Limit Reporting Units Numeric Action Level pH Field test with calibrated portable instrument Risk Level 2 Discharges 0.2 pH units lower NAL = 6.5 upper NAL = 8.5 Risk Level 2 Discharges other than ATS 1 NTU 250 NTU Turbidity EPA 0180.1 and/or field test with calibrated portable instrument For ATS discharges 1 NTU N/A
CASQA SWPPP Template 77 December 2019
Appendix B: Site Maps
PLANNING ENGINEERING SURVEYING
3990 Ruffin Road, Suite 120
San Diego, Ca. 92123
858-560-1141
858-560-8157 Fax
PLANNING ENGINEERING SURVEYING
3990 Ruffin Road, Suite 120
San Diego, Ca. 92123
858-560-1141
858-560-8157 Fax
PLANNING ENGINEERING SURVEYING
3990 Ruffin Road, Suite 120
San Diego, Ca. 92123
858-560-1141
858-560-8157 Fax
CASQA SWPPP Template 78 December 2019
Appendix C: Permit Registration Documents
□ Notice Of Intent (NOI)
□ Risk Assessment
□ Signed Certification Statement
□ Post-Construction Water Balance
□ Copy of Annual Fee Receipt
□ ATS Design Documents
□ Site Map, see Appendix B
□ Include the project Waste Discharge Identification (WDID) confirmation
CASQA SWPPP Template 79 December 2019
Appendix D: SWPPP Amendment Certifications
CASQA SWPPP Template 80 December 2019
SWPPP Amendment
No.
Project Name: AVIARA WEST / LAUREL TREE LANE WIDENING
Project Number:
Qualified SWPPP Developer’s Certification of the
Stormwater Pollution Prevention Plan Amendment
“This Stormwater Pollution Prevention Plan and its appendices were prepared under my
direction to meet the requirements of the California Construction General Permit (SWRCB
Order No. 2009-009-DWQ as amended by 2010-0014-DWQ and 2012-0006-DWQ). I certify
that I am a Qualified SWPPP Developer in good standing as of the date signed below.”
QSD’s Signature Date
QSD Name QSD Certificate Number
Title and Affiliation Telephone
Address Email
CASQA SWPPP Template 81 December 2019
Appendix E: Submitted Changes to PRDs
CASQA SWPPP Template 82 December 2019
Log of Updated PRDs
The General Permit allows for the reduction or increase of the total acreage covered under the
General Permit when a portion of the project is complete and/or conditions for termination of
coverage have been met; when ownership of a portion of the project is purchased by a different
entity; or when new acreage is added to the project.
Modified PRDs shall be filed electronically within 30 days of a reduction or increase in total
disturbed area if a change in permit covered acreage is to be sought. The SWPPP shall be
modified appropriately, with revisions and amendments recorded in Appendix C. Updated
PRDs submitted electronically via SMARTS can be found in this Appendix.
This appendix includes all of the following updated PRDs (check all that apply):
Revised Notice of Intent (NOI);
Revised Site Map;
Revised Risk Assessment;
New landowner’s information (name, address, phone number, email address); and
New signed certification statement.
Legally Responsible Person
Signature of Legally Responsible Person or
Approved Signatory
Date
Name of Legally Responsible Person or Approved
Signatory
Telephone Number
CASQA SWPPP Template 83 December 2019
Appendix F: Construction Schedule
ID Task Name Duration Start Finish
1 CONSTRUCTION 460 days Thu 9/1/22 Wed 6/5/24
2 Site Demolition 1 mon Thu 9/1/22 Wed 9/28/22
3 Grading 2 mons Thu 9/29/22 Wed 11/23/22
4 Building Construction 20 mons Thu 11/24/22 Wed 6/5/24
5 Offsite Improvements 6 mons Mon 4/3/23 Fri 9/15/23
6 Project Completion 0 days Wed 6/5/24 Wed 6/5/24 6/5
Qtr 1 Qtr 2 Qtr 3 Qtr 4 Qtr 1 Qtr 2 Qtr 3 Qtr 4 Qtr 1 Qtr 2 Qtr 3
2022 2023 2024
Aviara Apartments - Construction Schedule - Draft Schedule
Mon 5/9/22
Page 1
CASQA SWPPP Template 84 December 2019
Appendix G: Construction Activities, Materials Used,
and Associated Pollutants
Table G.a POLLUTANTS ASSOCIATED WITH CONSTRUCTION ACTIVITIES
General Work Activity/
Products With Potential
Stormwater Pollutants
Specific Work Activity/Products
With Potential Stormwater
Pollutants
Pollutant
Categories
Adhesives Adhesives, glues, resins, epoxy
synthetics, PVC cement
Caulks, sealers, putty, sealing agents
and
Coal tars (naphtha, pitch)
Oil and Grease,
Synthetic Organics1
Asphalt paving/curbs Hot and cold mix asphalt Oil and Grease
Cleaners Polishes (metal, ceramic, tile)
Etching agents
Cleaners, ammonia, lye, caustic sodas,
bleaching agents and chromate salts
Metals, Synthetic
Organics
Concrete / Masonry Cement and brick dust
Colored chalks
Concrete curing compounds
Glazing compounds
Surfaces cleaners
Saw cut slurries
Tile cutting
Metals, Synthetic
Organics
Drywall Saw-cutting drywall Metals
Framing/Carpentry Sawdust, particle board dust, and
treated woods
Saw cut slurries
Metals, Synthetic
Organics
Heating, Ventilation, Air
Conditioning
Demolition or construction of air
condition and heating systems
Metals, Synthetic
Organics
Insulation Demolition or construction involving
insulation, venting systems
Metals, Synthetic
Organics
Liquid waste Wash waters
Irrigation line testing/flushing
Metals, Synthetic
Organics
Painting Paint thinners, acetone, methyl ethyl
ketone, stripper paints, lacquers,
varnish, enamels, turpentine, gum
spirit, solvents, dyes, stripping pigments
and sanding
Metals, Synthetic
Organics
Planting / Vegetation
Management
Vegetation control
(pesticides/herbicides)
Planting
Plant maintenance
Vegetation removal
Nutrients, Metals,
Synthetic Organics
CASQA SWPPP Template 85 December 2019
Table G.a POLLUTANTS ASSOCIATED WITH CONSTRUCTION ACTIVITIES
General Work Activity/
Products With Potential
Stormwater Pollutants
Specific Work Activity/Products
With Potential Stormwater
Pollutants
Pollutant
Categories
Plumbing Solder (lead, tin), flux (zinc chloride),
pipe fitting
Galvanized metal in nails, fences, and
electric wiring
Metals, Synthetic
Organics
Pools/fountains Chlorinated water Synthetic Organics
Removal of existing
structures
Demolition of asphalt, concrete,
masonry, framing, roofing, metal
structures.
Metals, Oil and
Grease, Synthetic
Organics
Roofing Flashing
Saw cut slurries (tile cutting)
Shingle scrap and debris
Metals, Oil and
Grease, Synthetic
Organics
Sanitary waste Portable toilets
Disturbance of existing sewer lines.
Nutrients
Soil
preparation/amendments
Use of soil additives/amendments Nutrients
Solid waste Litter, trash and debris
Vegetation
Gross Pollutants
Utility line testing and
flushing
Hydrostatic test water
Pipe flushing
Synthetic Organics
Vehicle and equipment use Equipment operation
Equipment maintenance
Equipment washing
Equipment fueling
Oil and Grease
1 Synthetic Organics are defined in Table 1.2 of the CASQA Stormwater BMP Handbook Portal:
Construction as adhesives, cleaners, sealants, solvents, etc. These are generally categorized as
VOCs or SVOCs.
CASQA SWPPP Template 86 December 2019
Table G.1 Construction Activities and Associated Pollutants
Phase Activity Associated Materials or
Pollutants Pollutant Category(1) Grading and Land Development
Streets and Utilities Phase
Vertical Construction Phase
Landscaping and Site Stabilization Phase
(1) Categories per CASQA BMP Handbook (i.e., Sediment, Nutrients, Bacteria and Viruses, Oil
and Grease, Metals, Synthetic Organics, Pesticides, Gross Pollutants, and Vector Production)
CASQA SWPPP Template 87 December 2019
Appendix H: CASQA Stormwater BMP Handbook
Portal: Construction Fact Sheets
CASQA SWPPP Template 88 December 2019
Appendix I: BMP Inspection Form
Risk Level 2
CASQA SWPPP Template 89 December 2019
BMP INSPECTION REPORT
Date and Time of Inspection: Date Report Written:
Inspection Type:
(Circle one)
Weekly
Complete Parts
I,II,III and VII
Pre-Storm
Complete Parts
I,II,III,IV and VII
During Rain Event
Complete Parts I, II,
III, V, and VII
Post-Storm
Complete Parts
I,II,III,VI and VII
Part I. General Information
Site Information
Construction Site Name:
Construction stage and
completed activities:
Approximate area
of site that is exposed:
Photos Taken:
(Circle one) Yes No Photo Reference IDs:
Weather
Estimate storm beginning:
(date and time)
Estimate storm duration:
(hours)
Estimate time since last storm:
(days or hours)
Rain gauge reading and location:
(in)
Is a “Qualifying Event” predicted or did one occur (i.e., 0.5” rain with 48-hrs or greater between events)? (Y/N)
If yes, summarize forecast:
Exemption Documentation (explanation required if inspection could not be conducted). Visual
inspections are not required outside of business hours or during dangerous weather conditions such as flooding
or electrical storms.
Inspector Information
Inspector Name: Inspector Title:
Signature: Date:
CASQA SWPPP Template 90 December 2019
Part II. BMP Observations. Describe deficiencies in Part III.
Minimum BMPs for Risk Level _____ Sites
Failures or
other short
comings
(yes, no, N/A)
Action
Required
(yes/no)
Action
Implemented
(Date)
Good Housekeeping for Construction Materials
Inventory of products (excluding materials designed to be
outdoors)
Stockpiled construction materials not actively in use are
covered and bermed
All chemicals are stored in watertight containers with
appropriate secondary containment, or in a completely
enclosed storage shed
Construction materials are minimally exposed to precipitation
BMPs preventing the off-site tracking of materials are
implemented and properly effective
Good Housekeeping for Waste Management
Wash/rinse water and materials are prevented from being
disposed into the storm drain system
Portable toilets are contained to prevent discharges of waste
Sanitation facilities are clean and with no apparent for leaks
and spills
Equipment is in place to cover waste disposal containers at
the end of business day and during rain events
Discharges from waste disposal containers are prevented from
discharging to the storm drain system / receiving water
Stockpiled waste material is securely protected from wind and
rain if not actively in use
Procedures are in place for addressing hazardous and non-
hazardous spills
Appropriate spill response personnel are assigned and trained
Equipment and materials for cleanup of spills is available
onsite
Washout areas (e.g., concrete) are contained appropriately to
prevent discharge or infiltration into the underlying soil
Good Housekeeping for Vehicle Storage and Maintenance
Measures are in place to prevent oil, grease, or fuel from
leaking into the ground, storm drains, or surface waters
All equipment or vehicles are fueled, maintained, and stored in
a designated area with appropriate BMPs
Vehicle and equipment leaks are cleaned immediately and
disposed of properly
CASQA SWPPP Template 91 December 2019
Part II. BMP Observations Continued. Describe deficiencies in Part III.
Minimum BMPs for Risk Level _____ Sites
Adequately
designed,
implemented and
effective
(yes, no, N/A)
Action
Required
(yes/no)
Action
Implemented
(Date)
Good Housekeeping for Landscape Materials
Stockpiled landscape materials such as mulches and topsoil
are contained and covered when not actively in use
Erodible landscape material has not been applied 2 days
before a forecasted rain event or during an event
Erodible landscape materials are applied at quantities and
rates in accordance with manufacturer recommendations
Bagged erodible landscape materials are stored on pallets and
covered
Good Housekeeping for Air Deposition of Site Materials
Good housekeeping measures are implemented onsite to
control the air deposition of site materials and from site
operations
Non-Stormwater Management
Non-Stormwater discharges are properly controlled
Vehicles are washed in a manner to prevent non-stormwater
discharges to surface waters or drainage systems
Streets are cleaned in a manner to prevent unauthorized non-
stormwater discharges to surface waters or drainage systems.
Erosion Controls
Wind erosion controls are effectively implemented
Effective soil cover is provided for disturbed areas inactive
(i.e., not scheduled to be disturbed for 14 days) as well as
finished slopes, open space, utility backfill, and completed lots
The use of plastic materials is limited in cases when a more
sustainable, environmentally friendly alternative exists.
Sediment Controls
Perimeter controls are established and effective at controlling
erosion and sediment discharges from the site
Entrances and exits are stabilized to control erosion and
sediment discharges from the site
Sediment basins are properly maintained
CASQA SWPPP Template 92 December 2019
Linear sediment control along toe of slope, face of slope an at
grade breaks (Risk Level 2 & 3 Only)
Limit construction activity to and from site to entrances and
exits that employ effective controls to prevent offsite tracking
(Risk Level 2 & 3 Only)
Ensure all storm, drain inlets and perimeter controls, runoff
control BMPs and pollutants controls at entrances and exits
are maintained and protected from activities the reduce their
effectiveness (Risk Level 2 & 3 Only)
Inspect all immediate access roads daily (Risk Level 2 & 3
Only)
Run-On and Run-Off Controls
Run-on to the site is effectively managed and directed away
from all disturbed areas.
Other
Are the project SWPPP and BMP plan up to date, available onsite
and being properly implemented?
Part III. Descriptions of BMP Deficiencies
Deficiency
Repairs Implemented:
Note - Repairs must begin within 72 hours of identification and,
complete repairs as soon as possible.
Start Date Action
1.
2.
3.
4.
Part IV. Additional Pre-Storm Observations. Note the presence or absence of floating and
suspended materials, sheen, discoloration, turbidity, odors, and source(s) of pollutants(s).
Yes, No, N/A
Do stormwater storage and containment areas have adequate freeboard? If no, complete Part III.
Are drainage areas free of spills, leaks, or uncontrolled pollutant sources? If no, complete Part VII
and describe below.
CASQA SWPPP Template 93 December 2019
Notes:
Are stormwater storage and containment areas free of leaks? If no, complete Parts III and/or VII
and describe below.
Notes:
Part V. Additional During Storm Observations. If BMPs cannot be inspected during inclement
weather, list the results of visual inspections at all relevant outfalls, discharge points, and
downstream locations. Note odors or visible sheen on the surface of discharges. Complete Part
VII (Corrective Actions) as needed.
Outfall, Discharge Point, or Other Downstream Location
Location Description
Location Description
Location Description
Location Description
Location Description
Location Description
Location Description
Location Description
CASQA SWPPP Template 94 December 2019
Part VI. Additional Post-Storm Observations. Visually observe (inspect) stormwater
discharges at all discharge locations within two business days (48 hours) after each qualifying
rain event, and observe (inspect) the discharge of stored or contained stormwater that is
derived from and discharged subsequent to a qualifying rain event producing precipitation of ½
inch or more at the time of discharge. Complete Part VII (Corrective Actions) as needed.
Discharge Location, Storage
or Containment Area
Visual Observation
Part VII. Additional Corrective Actions Required. Identify additional corrective actions not
included with BMP Deficiencies (Part III) above. Note if SWPPP change is required.
Required Actions Implementation Date
CASQA SWPPP Template 95 December 2019
Appendix J: Project Specific Rain Event Action Plan
Template
CASQA SWPPP Template 96 December 2019
Rain Event Action Plan (REAP)
Date: NOAA Report Attached WDID Number:
Date Rain Predicted: Predicted % chance of
rain:
Site Information:
Site Name, City and Zip Code Project Risk Level:
Site Stormwater Manager Information:
Name, Company, Emergency Phone Number (24/7)
Erosion and Sediment Control Contractor (labor force contracted for the Site):
Name, Company, Emergency Phone Number (24/7)
Stormwater Sampling Agent:
Name, Company, Emergency Phone Number (24/7)
Current Phase of Construction
(Check ALL the boxes below that apply to the site).
Grading and Land Development Vertical Construction Inactive Site
Streets and Utilities Final Landscaping/Site Stabilization Other:
Activities Associated with Current Phase(s)
Check ALL the boxes below that apply to the site (some apply to all Phases).
UGrading and Land Development:
Demolition Vegetation Removal Vegetation Salvage-Harvest
Rough Grade Finish Grade Blasting
Soil Amendment(s): Excavation (_____ ft) Soils Testing
Rock Crushing Erosion and Sediment Control Surveying
Equip. Maintenance/Fueling Material Delivery and Storage Other:
UStreets and Utilities:
Finish Grade Utility Install: water-sewer-gas Paving Operations
Equip. Maintenance/Fueling Storm Drain Installation Material Delivery & Storage
Curb and Gutter/Concrete Pour Masonry Other:
UVertical Construction:
Framing Carpentry Concrete/Forms/Foundation
Masonry Electrical Painting
Drywall/Interior Walls Plumbing Stucco
Equip. Maintenance/Fueling HVAC Tile
Exterior Siding Insulation Landscaping & Irrigation
Flooring Roofing Other:
UFinal Landscaping & Site Stabilization:
Stabilization Vegetation Establishment E&S Control BMP Removal
Finish Grade Storage Yard/ Material Removal Landscape Installation
Painting and Touch-Up Irrigation System Testing Other:
Drainage Inlet Stencils Inlet Filtration Perm. Water Quality Ponds
Other: Other: Other:
Inactive Construction Site:
E & S Control Installation Routine Site Inspection Trash Removal
E & S Control Maintenance Street Sweeping Other:
Page 1 of 3
CASQA SWPPP Template 97 December 2019
REAP (Continued)
Active on Site during Current Phase(s)
(Check ALL the boxes below that apply to your site)
Storm Drain Improvement Grading Contractor Surveyor- Soil Technician
Street Improvements Water Pipe Installation Sanitary Station Provider
Material Delivery Sewer Pipe Installation Electrical
Trenching Gas Pipe Installation Carpentry
Concrete Pouring Electrical Installation Plumbing
Foundation Communication Installation Masonry
Demolition Erosion and Sediment Control Water, Sewer, Electric Utilities
Material Delivery Equipment Fueling/Maintenance Rock Products
Tile Work- Flooring Utilities, e.g., Sewer, Electric Painters
Drywall Roofers Carpenters
HVAC installers Stucco Pest Control: e.g., Termites
Exterior Siding Masons Water Feature Installation
Insulation Landscapers Utility Line Testers
Fireproofing Riggers Irrigation System Installation
Steel Systems Utility Line Testers Other:
Trade Contractor Information Provided
(Check ALL the boxes below that apply to the site.)
Educational Material Handout Tailgate Meetings Training Workshop
Contractual Language Fines and Penalties Signage
Other: Other: Other:
Predicted Rain Event-Triggered Actions
Below is a list of suggested actions and items to review for this project. Each active Trade should check all material storage areas,
stockpiles, waste management areas, vehicle and equipment storage and maintenance, areas of active soil disturbance, and areas of
active work to ensure the proper implementation of BMPs. Project-wide BMPs should be checked and cross-referenced to the BMP
progress map.
Trade or Activity Suggested action(s) to perform / item(s) to review prior to rain event
Information &
Scheduling
Inform trade supervisors of predicted rain
Check scheduled activities and reschedule as needed
Alert erosion/sediment control provider
Alert sample collection contractor (if applicable)
Schedule staff for extended rain inspections
Check Erosion and Sediment Control (ESC) material stock
Review BMP progress map
Hours of operation verified for upcoming storm event
Other:
Material storage
areas
Material under cover or in sheds (e.g., treated woods and metals)
Perimeter control around stockpiles
Stockpiles covered (as applicable)
Other:
Waste
management areas
Dumpsters closed and drain holes plugged
Recycling bins covered
Portable restrooms have secondary containment and protected from tipping over
Page 2 of 3
CASQA SWPPP Template 98 December 2019
REAP (Continued)
Trade or Activity, Continued Suggested action(s) to perform / item(s) to review prior to rain event
Trade operations
Exterior operations shut down for event (e.g., no concrete pours or paving)
Soil treatments (e.g., fertilizer, soil binder) ceased within 24 hours of event
Materials and equipment (e.g., tools) properly stored and covered
Waste and debris disposed in covered dumpsters or removed from site
Trenches and excavations protected
Perimeter controls around disturbed areas
Fueling and repair areas covered and bermed
Other:
Erosion and Sediment Control
Adequate capacity in sediment basins and traps
Site perimeter and slope controls in place
Catch basin and drop inlet protection in place and cleaned
Temporary erosion controls deployed
Roads swept; site ingress and egress points stabilized
Temporary perimeter controls deployed around disturbed areas and stockpiles
Other:
Concrete washout Adequate capacity for rain or covered
Other:
Spill and drips
All incident spills and drips cleaned, including paint, stucco, fuel, and oil
Drip pans emptied
Other:
Other / Discussion / Diagrams
________________________________________
I certify under penalty of law that this Rain Event Action Plan (REAP) will be performed in accordance with the
General Permit by me or under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the
persons who manage the system, or those persons directly responsible for gathering the information, the
information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that
there are significant penalties for submitting false information, including the possibility of fine and imprisonment
for knowing violations.
________________________________ Date: _______________________
Qualified SWPPP Practitioner
Page 3 of 3
CASQA SWPPP Template 99 December 2019
Appendix K: Training Reporting Form
CASQA SWPPP Template 100 December 2019
Trained Contractor Personnel Log
Stormwater Management Training Log and Documentation
Project Name: AVIARA WEST / LAUREL TREE LANE WIDENING
WDID #:
Stormwater Management Topic: (check as appropriate)
Erosion Control Sediment Control
Wind Erosion Control Tracking Control
Non-Stormwater Management Waste Management and Materials Pollution Control
Stormwater Sampling
Specific Training Objective:
Location: Date: _
Instructor: Telephone:
Course Length (hours):
Attendee Roster (Attach additional forms if necessary)
Name Company Phone
As needed, add proof of external training (e.g., course completion certificates, credentials for
QSP, QSD).
CASQA SWPPP Template 101 December 2019
Appendix L: Responsible Parties
CASQA SWPPP Template 102 December 2019
Identification of QSP
Project Name: AVIARA WEST / LAUREL TREE LANE WIDENING
WDID #:
The following are QSPs associated with this project
Name of Personnel(1) Company Date
(1) If additional QSPs are required on the job site add additional lines and include information
here
Identification of LRP and Approved Signatories
Name of Personnel Company Date
Dennis Szuberla R&V Management 04/27/2022
CASQA SWPPP Template 103 December 2019
Appendix M: Contractors and Subcontractors
TBD
CASQA SWPPP Template 104 December 2019
CONTRACTORS AND SUBCONTRACTORS
PROJECT: WDID:
CONTRACTOR SUBCONTRACTOR INDIVIDUAL DIRECTED BY QSP OTHER
PLEASE CHECK APPROPRIATE BOX ABOVE. IF “OTHER”, PLEASE INDICATE:
COMPANY NAME
CONTACT PERSON TITLE:
ADDRESS
CITY STATE ZIP
Telephone
EMERGENCY Telephone
FAX
E-MAIL
START DATE END DATE
CONTRACTOR SUBCONTRACTOR INDIVIDUAL DIRECTED BY QSP OTHER
PLEASE CHECK APPROPRIATE BOX ABOVE. IF “OTHER”, PLEASE INDICATE:
COMPANY NAME
CONTACT PERSON TITLE:
ADDRESS
CITY STATE ZIP
Telephone
EMERGENCY Telephone
FAX
E-MAIL
START DATE END DATE
CASQA SWPPP Template 104 December 2019
Appendix N: Calculations
· Include calculations for anticipated off-site run-on to the project site [flow/volume] here.
Aviara - Potential On-site run-onP6=2.7Bypass (Existing)PortionAreaImpervC (A)C (D)CC x ATcI100Q100IDDescriptionSoil A(ac)(%)Soil ASoil D(ac)(min)(in/hr)(cfs)E-2Slope West0.01.2900.00.20 0.35 0.350 0.45 7.55.48 2.47 E-3Slope Southwest0.02.1600.00.20 0.35 0.350 0.76 7.55.48 4.14 E-4Slope Southwest0.12.8100.00.20 0.35 0.335 0.94 7.55.48 5.16 E-5Slope North1.00.3500.00.20 0.35 0.200 0.07 7.55.48 0.38 Total12.15 Aviara - Potential Off-site run-onBypass (Existing)PortionAreaImpervCC x ATcI100Q100IDDescriptionSoil A(ac)(%)(ac)(min)(in/hr)(cfs)E1LAUREL TREE LANE - EXISTING0.00.232100.00.950 0.22 5.07.11 1.57
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
A B C
Entry
96.57
0.2
2.15
Watershed Erosion Estimate (=RxKxLS) in tons/acre
Site Sediment Risk Factor
Low Sediment Risk: < 15 tons/acre
Medium Sediment Risk: >=15 and <75 tons/acre
High Sediment Risk: >= 75 tons/acre
K Factor Value
LS Factor Value
Medium
C) LS Factor (weighted average, by area, for all slopes)
The soil-erodibility factor K represents: (1) susceptibility of soil or surface material to erosion, (2) transportability of the
sediment, and (3) the amount and rate of runoff given a particular rainfall input, as measured under a standard
condition. Fine-textured soils that are high in clay have low K values (about 0.05 to 0.15) because the particles are
resistant to detachment. Coarse-textured soils, such as sandy soils, also have low K values (about 0.05 to 0.2)
because of high infiltration resulting in low runoff even though these particles are easily detached. Medium-textured
soils, such as a silt loam, have moderate K values (about 0.25 to 0.45) because they are moderately susceptible to
particle detachment and they produce runoff at moderate rates. Soils having a high silt content are especially
susceptible to erosion and have high K values, which can exceed 0.45 and can be as large as 0.65. Silt-size particles
are easily detached and tend to crust, producing high rates and large volumes of runoff. Use Site-specific data must
be submitted.
The effect of topography on erosion is accounted for by the LS factor, which combines the effects of a hillslope-length
factor, L, and a hillslope-gradient factor, S. Generally speaking, as hillslope length and/or hillslope gradient increase,
soil loss increases. As hillslope length increases, total soil loss and soil loss per unit area increase due to the
progressive accumulation of runoff in the downslope direction. As the hillslope gradient increases, the velocity and
erosivity of runoff increases. Use the LS table located in separate tab of this spreadsheet to determine LS factors.
Estimate the weighted LS for the site prior to construction.
41.53
Site-specific K factor guidance
LS Table
Sediment Risk Factor Worksheet
A) R Factor
R Factor Value
B) K Factor (weighted average, by area, for all site soils)
Analyses of data indicated that when factors other than rainfall are held constant, soil loss is directly proportional to a
rainfall factor composed of total storm kinetic energy (E) times the maximum 30-min intensity (I30) (Wischmeier and
Smith, 1958). The numerical value of R is the average annual sum of EI30 for storm events during a rainfall record of
at least 22 years. "Isoerodent" maps were developed based on R values calculated for more than 1000 locations in
the Western U.S. Refer to the link below to determine the R factor for the project site.
http://cfpub.epa.gov/npdes/stormwater/LEW/lewCalculator.cfm
Receiving Water (RW) Risk Factor Worksheet Entry Score
A. Watershed Characteristics yes/no
A.1. Does the disturbed area discharge (either directly or indirectly) to a 303(d)-listed
waterbody impaired by sediment? For help with impaired waterbodies please check the
attached worksheet or visit the link below:
2006 Approved Sediment-impared WBs Worksheet
http://www.waterboards.ca.gov/water_issues/programs/tmdl/303d_lists2006_epa.shtml
OR
A.2. Does the disturbed area discharge to a waterbody with designated beneficial uses of
SPAWN & COLD & MIGRATORY?
http://www.ice.ucdavis.edu/geowbs/asp/wbquse.asp
No Low
Low Medium High
Low Level 1
High Level 3
Project Sediment Risk:Medium 2
Project RW Risk:Low 1
Project Combined Risk:Level 2
Combined Risk Level Matrix
Sediment Risk
Receiving Water RiskLevel 2
Level 2
CASQA SWPPP Template 105 December 2019
Appendix O: Weather Reports
The discharger must obtain the precipitation forecast information from the National Weather
Service Forecast Office (http://forecast.weather.gov ). A printed copy should be retained in this
Appendix.
zip code 92011
CASQA SWPPP Template 106 December 2019
Appendix P: Monitoring Records
CASQA SWPPP Template 107 December 2019
Appendix Q: Example Storm Event Monitoring
Forms
CASQA SWPPP Template 108 December 2019
Rain Gauge Log Sheet
Construction Site Name:
WDID #:
Date
(mm/dd/yy)
Time
(24-hr) Initials Rainfall Depth
(Inches) Notes:
CASQA SWPPP Template 109 December 2019
Risk Level 1, 2, 3
Visual Inspection Field Log Sheet
Date and Time of Inspection: Report Date:
Inspection Type: □ Weekly □ Before
predicted rain
□ During
rain event
□
Following
qualifying
rain event
□ Contained
stormwater
release
□ Quarterly
non-
stormwater
Site Information
Construction Site Name:
Construction stage and
completed activities:
Approximate area
of exposed site:
Weather and Observations
Date Rain Predicted to Occur: Predicted % chance of rain:
Estimate storm beginning:
(date and time)
Estimate storm
duration:_________
(hours)
Estimate time since
last storm:
________
(days or hours)
Rain gauge
reading: _______
(inches)
Observations: If yes identify location
Odors Yes □ No □
Floating material Yes □ No □
Suspended Material Yes □ No □
Sheen Yes □ No □
Discolorations Yes □ No □
Turbidity Yes □ No □
Site Inspections
Outfalls or BMPs Evaluated Deficiencies Noted
(add additional sheets or attached detailed BMP Inspection Checklists)
Photos Taken: Yes □ No □ Photo Reference IDs:
Corrective Actions Identified (note if SWPPP/REAP change is needed)
Inspector Information
Inspector Name: Inspector Title:
Signature: Date:
Risk Level 2
Effluent Sampling Field Log Sheets
CASQA SWPPP Template 110 December 2019
Construction Site Name: Date: Time Start:
Sampler:
Sampling Event Type: □ Stormwater □ Non-stormwater □ Non-visible pollutant
Field Meter Calibration
pH Meter ID No./Desc.:
Calibration Date/Time:
Turbidity Meter ID No./Desc.:
Calibration Date/Time:
Field pH and Turbidity Measurements
Discharge Location Description pH Turbidity Time
Grab Samples Collected
Discharge Location Description Sample Type Time
Additional Sampling Notes:
Time End:
CASQA SWPPP Template 111 December 2019
NAL Exceedance Evaluation Summary Report Page __ of __
Project Name AVIARA WEST / LAUREL TREE LANE WIDENING
Project WDID
Project Location
Date of Exceedance
Type of Exceedance
NAL Daily Average pH Turbidity
Other (specify)
Measurement or
Analytical Method
Field meter
(Sensitivity: )
Lab method (specify)
(Reporting Limit: )
(MDL: )
Calculated Daily
Average
pH pH units
Turbidity NTU
Rain Gauge
Measurement inches
Compliance Storm
Event inches (5-year, 24-hour event)
Visual Observations
on Day of
Exceedance
CASQA SWPPP Template 112 December 2019
NAL Exceedance Evaluation Summary Report Page __ of __
Description of BMPs
in Place at Time of
Event
Initial Assessment
of Cause
Corrective Actions
Taken (deployed
after exceedance)
Additional
Corrective Actions
Proposed
Report Completed
By
(Print Name, Title)
Signature
CASQA SWPPP Template 113 December 2019 CHAIN-OF-CUSTODY DATE: Lab ID: DESTINATION LAB: REQUESTED ANALYSIS Notes: ATTN: ADDRESS: Office Phone: Cell Phone: SAMPLED BY: Contact: AVIARA WEST / LAUREL TREE LANE WIDENING Client Sample ID Sample Sample Sample Container Date Time Matrix # Type Pres. SENDER COMMENTS: RELINQUISHED BY Signature: Print: Company: Date: TIME: LABORATORY COMMENTS: RECEIVED BY Signature: Print: Company: Date: TIME:
CASQA SWPPP Template 114 December 2019
Appendix R: Field Meter Instructions
CASQA SWPPP Template 115 December 2019
Appendix S: Supplemental Information