HomeMy WebLinkAbout; VISTA/CARLSBAD INTERCEPTOR SEWER; STORM WATER RUNOFF; 1998-06-30CARLSBAD MUNICIPAL WATER DISTRICT
ENGINEERING DEPARTMENT
VISTA/CARLSBAD INTERCEPTOR SEWER
REPLACEMENT REACHES VC5B Through VC9,
and OAK AVENUE STORM DRAIN PROJECTS
STATE OF CALIFORNIA
NATIONAL POLLUTANT DISCHARGE ELIMINARTION SYSTEM (NPDES)
STORM WATER POLLUTION PREVENTION PLAN
AND MONITORING PLAN
FOR
DISCHARGES OF STORM WATER RUNOFF
ASSOCIATED WITH CONSTRUCTION ACTIVITY
June 1998
MALCOLM
PIRNIE
STATE OF CALIFORNIA
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPpES)
STORM WATER POLLUTION PREVENTION £LAN
AND MONITORING PLAN
FOR THE
VISTA/CARLSBAD INTERCEPTOR SEWER REPLACEMB^B&ACHES
VC5B - VC9 AND
OAK AVENUE STORM DRAIN PROJECTS
FOR
DISCHARGES OF STORM WATER RUNOFF A§SOCJA?iBi.WITH
CONSTRUCTION ACTIVITY
We, the undersigned, certify under penalty of law that this,documep|;aiid:§jl;at^aGh.ments
were prepared under our direction or supervision in accordance wiOiiabiSystejrfit'^fi^igned to
ensure that qualified personnel properly gather and evaluate the ir4i^rmatj§r4',submitted.
Based on our inquiry of the person or persons who manage the systefn^r; tJ3gse:persons
directly responsible for gathering the information, the information submitted, i£etp,ihe best
of my knowledge and belief, true, accurate, and complete. We arfirawaFe,rthat there are
significant penalties for submitting false information, including ,jtjie^$5os;sibi!ity of,
imprisonment for knowing violations.
For the Carlsbad Municipal Water District
~ <
Signature (1)
Printed Name
Title (1)
6-30-
Date
(1) Certification by either a principal executive officer or a ranking elected official, or duly authorized
representative.
TABLE OF CONTENTS
Page
1.0 BACKGROUND 1-1
2.0 PROJECT DESCRIPTION 2-1
3.0 STORM WATER POLLUTION PREVENTION PLAN 3-1
3.1 Objectives 3-1
3.2 Implementation 3-1
3.3 Availability 3-1
3.4 Required Changes 3-2
3.5 Source Identification 3-2
3.5.1 Site Conditions 3-2
3.5.2 Source Identification 3-3
3.6 Erosion and Sediment Control 3-6
3.7 Non-Storm Water Management 3-6
3.8 Post-Construction Storm Water Management 3-6
3.9 Waste Management and Disposal 3-7
3.10 Maintenance, Inspection, and Repair 3-7
3.11 Training 3-7
3.12 List of Contractors and Subcontractors 3-7
4.0 MONITORING PROGRAM AND REPORTING REQUIREMENTS 4-1
4.1 Objectives 4-1
4.2 Required Changes 4-1
4.3 Site Inspection 4-1
4.4 Compliance Certification 4-1
4.5 Noncompliance Reporting 4-2
4.6 Monitoring Reports 4-2
LIST OF FIGURES
Figure Following
No. Description Page
2-1 Vicinity Map 2-1
3-1 Site Plan 3-3
3-2 Site Drainage 3-3
3-3 Existing 100 Year Flood Plain 3-4
-i-
TABLE OF CONTENTS (Continued)
LIST OF APPENDICES
Appendix Description Page
A General Construction Activity Storm Water Permit A-l
B Notice of Intent B-l
C BMP Control Device C-l
D Record of Changes D-l
E Inspection Checklist E-l
-11-
1.0 BACKGROUND
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 is unlawful, unless the discharger is in compliance with a National
Pollutant Discharge Elimination System (NPDES) permit. The 1987 amendments to the
CWA added Section 402(p) which established a framework for regulating municipal and
industrial storm water discharges under the NPDES program. On November 16, 1990, the
U.S. Environmental Protection Agency (EPA) published final regulations that establish
storm water permit application requirements for specified categories of industries. The
regulations require that discharges of storm water associated with construction activity
(storm water discharges) from soil disturbances of five acres or more must be regulated as
an industrial activity and covered by a NPDES permit.
The State Water Resources Control Board (State Board) has the responsibility in
California for implementing the NPDES program under the EPA. Although Federal
regulations allow two permitting options for storm water discharges (individual permits and
general permits), the State Board elected to adopt only one statewide general permit that will
apply to all construction activity storm water discharges with the exception of those on
Indian lands and those within the Lake Tahoe Hydrologic Unit. On August 20, 1992, the
State Board adopted the NPDES General Construction Activity Storm Water Permit (see
Appendix A). The State board is not currently requiring storm water discharges from soil
disturbances of less than five acres to be covered by this general storm water permit.
This general permit requires all owners of construction activities in excess of five
acres to:
1) Eliminate or reduce non-storm water discharges to storm sewer systems and
other waters of the nation,
2) Develop and implement a Storm Water Pollution Prevention Plan (SWPPP),
and
3) Perform inspections of storm water pollution prevention measures (control
practices).
3325-001 1-1
One of the major goals of the General Storm Water Permit is the reduction or
elimination of non-storm water discharges. Non-storm water discharges include a wide
variety of sources, including improper dumping, spills, and leakage from storage tanks or
transfer areas. Non-storm water discharges may contribute a significant pollutant load to
receiving waters. Measures to control spills, leakage, and dumping during construction can
often be addressed through Best Management Practices (BMPs). Although this General
Permit prohibits the discharge of materials other than storm water, it does recognize that
certain other non-storm water discharges may be necessary for the practical performance and
completion of the construction project. Such discharges include, but are not limited to:
landscape irrigation, pipe flushing and testing, street washing, and construction dewatering.
Such discharges are allowed if the discharges:
1) are infeasible to eliminate,
2) comply with the BMPs described in the SWPPP,
3) do not cause or contribute to a violation of water quality standards, and
4) are not required to be permitted by the local Regional Water Quality Control
Board (i.e., construction dewatering activities in the San Diego Region
require coverage under the San Diego Regional Board Order 96-41).
3325-001 1-2
2.0 PROJECT DESCRIPTION
The Vista/Carlsbad Interceptor Sewer Replacement, Reaches VC5B to VC9 Project
Site is located west of the 1-5 Freeway at the Carlsbad Village Drive exit, along Jefferson
Street and Oak Avenue. (Figure 2-1). This project combines both sewer replacement and
storm drain addition.
Sewer Replacement Project
The sewer replacement project consists of the construction of a 36" to 42" gravity-
flow sewer line which extends 5600 feet along Jefferson Street, crosses Carlsbad Village
Drive and turns west along Oak Avenue. The project alignment generally parallels the
existing sewer line along Jefferson Street. At the end of Oak Avenue, the replacement sewer
will reconnect with the existing line and will also provide for a future connection. This line
increases the capacity of the existing sewer main. Manholes will be installed approximately
every 1000 feet, and invert pipe depths will vary between 10 and 17 feet.
Storm Drain Project
The storm drain project phase will provide subsurface storm water drainage for Oak
Avenue west of Jefferson Street. It includes the construction of new curb inlet structures
along Oak Avenue which will feed a new 30" gravity flowing storm drain. The drain
extends for approximately 700 feet and empties into an existing open drainage trench east
of the railroad tracks. A future storm drain expansion project is planned to extend the storm
drain pipeline and to eliminate the existing drainage trench. Invert pipe depths for the storm
drain will be approximately 6 feet.
3325-001 2-1
auth Oceansuie
;V .•„,.< Nnv.v V^ •; i
I A- "'•V\-\
CARLSBAD
4 . A \ ' G
111 •,«., 15-PROPOSED
PIPELINE
ALIGNMENT
o VISTA/CARLSBAD INTERCEPTOR
SEWER REPLACEMENT PROJECT
0 REACHES VC5B TO VC9
SITE PLAN FIGURE 2-1
3.0 STORM WATER POLLUTION PREVENTION PLAN
3.1 OBJECTIVES
This Storm Water Pollution Prevention Plan (SWPPP) has been developed to comply
with the General Construction Activity Storm Water Permit (General Permit) requirements
for the construction of the CWMD sewer interceptor and storm drain. Each of the items
identified in the General Permit is addressed in the following paragraphs. It is the
dischargers responsibility to implement and amend this SWPPP as necessary to ensure the
following objectives are met:
a) identify the sources of sediment and other pollutants that may affect the quality
of storm water discharges associated with construction activity (storm water
discharges) from the construction site, and
b) identify, construct, and implement storm water pollution prevention measures
(control practices) to reduce sediment and other pollutants in storm water
discharges from the construction site and storage yards both during
construction and after construction is completed.
3.2 IMPLEMENTATION
As required by the General Permit, the Notice of Intent (NOI) and appropriate fee
have been submitted to the State Water Resources Control Board by CMWD. A copy of the
NOI is included in Appendix B. The fee for the NOI must be submitted annually until a
Notice of Termination (NOT) is submitted.
This SWPPP and corresponding Monitoring Plan must be completed and
implemented concurrent with commencement of construction activities.
3.3 AVAILABILITY
The SWPPP shall be kept on site during construction activity and made available
upon the request of a representative of the Regional Water Quality Control Board (RWQCB)
or any other agency that is involved with providing review or approval of the construction
3325-001 3-1
activity, erosion and sediment controls, or storm water discharges. Records of all
inspections, compliance certificates, and non-compliance reporting must be retained by the
discharger for at least three years.
3.4 REQUIRED CHANGES
The SWPPP must be changed whenever there is a change in construction or
operations which may affect the discharge of significant quantities of pollutants to surface
waters, groundwaters, or a municipal storm water system. The SWPPP should also be
amended if it is in violation of any condition of the General Permit or has not achieved any
of the objectives as described above.
3.5 SOURCE IDENTIFICATION
3.5.1 Site Conditions
The entire project area is located within the coastal plains roughly 0.5 to 2 miles from
the coastline, and lies between Buena Vista Lagoon and Agua Hedionda Lagoon. Coastal
Carlsbad is characterized by narrow sand and cobble beaches backed by seacliffs and
moderate to steeply sloping coastal bluffs. A narrow linear ridge parallels the coastline
immediately east of the bluff top with elevations ranging from +50 to +60 feet MSL.
Elevations along the NCTD right-of-way in Carlsbad range from +30 to +45 feet MSL. The
southern end of the NCTD right-of-way steeply descends toward Agua Hedionda Lagoon in
a V-shaped drainage ditch. East of this, the topography rises in a series of stepped terraces
for several miles.
Currently, storm water in the vicinity of the project flows by street gutter and
pipelines towards Buena Vista Lagoon to the north and Aqua Hedionda Lagoon to the south.
Carlsbad Village Drive is the approximate dividing line for the watershed.
According to the geotechnical report prepared by Woodward-Clyde Consultants,
dated January 1998, the geology of the Carlsbad site area is dominated by Quanternary-age
terrace deposits that have been deposited on wavecut platforms cut into Tertiary-age
sedimentary deposits of the Santiago Formation. Once elevated above sea level, the wave-
3325-001 3-2
cut bench and overlying thin marine deposits collect non-marine sedimentary cover
consisting primarily of sandy deposits. The lithology underlying Tertiary sedimentary
deposits include sandstones (predominantly cemented sand), and siltstones (predominantly
cemented silt) of the Santiago Formation.
The site subsurface is made up of three geologic units: fill soil, terrace deposits, and
Santiago Formation. The depth and consistency of the fill soils may vary significantly along
the proposed alignment depending on the amount of development in the area. Nonmarine
terrace deposits are also found locally throughout the site area with depths ranging from 15
to 30 feet. Adjacent to the Hedionda Lagoon, the thickness reduces to less than 10 feet. The
Santiago Formation is found deeper than the terrace deposits and consists of interbeded, wet
and dense sandstone and hard siltstone.
The total project construction area including work zone is approximately 5.0 acres.
The project site is located in an area of commercial use, multi-family and single family
residential. All work is for subsurface improvements and therefore will not affect the
existing run-off coefficient for this area.
3.5.2 Source Identification
The following information is presented on the Site Maps, Figure 2-1 and Figure 3-1,
as required by Paragraph 5(a) of the General Permit:
• construction site
• surface water bodies within the project area
• general topography
Off site and on-site existing and proposed drainage systems are depicted in Figure 3-2.
Figure 3-1 also presents the following additional information, when applicable, as required
by Paragraph 5(b) of the General Permit.
a) Location and type of control practices to be used during construction:
- Control practices will keep storm water surface drainage from entering the
project site, and will typically be of the housekeeping nature. The
Contractor is responsible for diverting any stormwater surface flow
around the project site.
b) Areas used to store soils and wastes
Storage of excavated soils or wastes will be at an off-site location
3325-001 3-3
designated by the contractor. This storage area must comply with the
suggested control practices.
c) Areas of cut and fill
- Excavation areas located within Jefferson St. and Oak Ave. The total
trench length is 6300 feet with a maximum width of 9 ft. Manhole
excavations, placed approximately every 1000 ft., will be a maximum
width of 14 feet.
d) Drainage patterns and slopes anticipated after major grading activities are
completed
Grading and drainage patterns will not change as a result of construction,
e) Areas of soil disturbance
Areas of soil disturbance are expected to be confined to within the
construction zone which is shown on Figure 3-1. The approximate area of
the site excavation and workzone for the combined sewer replacement and
storm drain project is 5 acres.
f) Surface water locations
The location of the Buena Vista and Agua Hedionda Lagoons are north and
south of the project construction site, respectively, as seen on Figure 2-1.
The associated 100-year flood plain is shown in Figure 3-3.
g) Areas of potential soil erosion where control practices will be used during
construction
- Erosion should not be a significant problem at this site, since all of the
excavation areas are surrounded by concrete, and the vertical trench
excavations will be shored. Control practices for erosion will be minimal
during construction, and will concentrate where no cement exists at the end
of Oak Avenue and at the storm drain outlet.
h) Existing and planned paved areas and buildings
The backfilled excavation areas will be re-paved to match the condition that
existed prior to construction.
i) Locations of post-construction control practices
Post-construction control practices will be minimal. Erosion control
practices will be implemented at the storm drain outlet into the open
drainage trench. Existing heavy vegetation in the area already provides
significant erosion control.
j) An outline of the drainage area for each on-site storm water discharge point
The drainage areas within the project area are identified on Figure 3-2.
3325-001 3-4
48"RCP V 48"RCP/4.6%^U |~1
48"RCP—, -\\ L
3.1% ^Xl'2%1
42"RCP
CP/.62%
BSOTERCEPTOR SEWER
(THIS PROJECT)45"RCP-(24"RCP/0.4%)
_ 45"RCP
\ (36"RCP/3.0%)
\ '
66"RCP/7.1%-
66"RCP/9.7%
66°RCP/0.5
FJ7*» r-°y-:
^ r-18"RCP/.29%
&
18"RCP/1.0%
13"ACP/2C.5%
18"RCP/1.97%
WATERSHED DIVIDE
24"RCP/21.07%
24"RCP/1.0%
18"RCP
18"RCP/7.74%
^
5% 42"RCP/5.0%
27"RCP/0.5%
18"RCP/2.0%
27'RCP/1.0%
36"RCP
36 RCP/0.6%
36-RCP/0.3
RCP/0.
66"RCP/018"RCP/10.6%
18"RCP/17.0%
66"RCP/0.5%
OBL 48"RCP/0.5%
J.0%) S
(30"RCP/0.9%)
54"RCP «.
(30"RCP/1.3%)
6X4...RCS
k BB (EARTHEN CHANNEL) Jl
21"RCP/1.2%
18"RCP/1.0%
18"RCP/.5%
18"CMP
30"RCP/0.5%
18"RCP
18"RCP
48"RCP/0.7%
15"ACP/68%
15"ACP/29%
LEGEND:
^•••••i EXISTING STORM DRAIN
• •••• PROPOSED STORM DRAIN (OTHER PROJECTS) jf
PROPOSED STORM DRAIN
THIS PROJECT
SITE AREA DRAINAGE
48"RCP/0.9%
48"RCP/1.0%EXIST. i '.
-OJ KUK I'/ BROW DITCH
0.72% IS.
48nRCP/2AZ x FIGURE 3-2 I
^
South Oceansme
100 YEAR
FLOOD BOUNDARY
PROPOSED
PIPELINE ALIGNMENT
LEGEND:
AREAS INUNDATED BY 100 YEAR FLOOD
I""! ZONE A
[j| ZONE AE
ZONE VE
100 YEAR FLOOD ZONES
NATIONAL FLOOD INSURANCE PROGRAM - June 1997 FIGURE 3-3
NOTES:
1. WE PROJECT SASEUNE IS THE CENTERUNE OF THE INTERCEPTOR
SEW!.
2. THE BASELINE TRAVERSE FOR THE INTERCEPTOR SEWER IS THE
SAME FOR BOTH SCHEDULES A AND B.
STORM DRAIN
SCHEDULE C.
SEE SHEET 18
\
INTERCEPTOR SEWER
(EXCAVATED AREA)
'INTERCEPTOR SEWER
(EXCAVATED AREA)
INTERCEPTOR SEWER
BASELINE COORDINATES
ITEM
(1)
(2)
(3)(+)
(5)
(6)
(7)
MANHOLE
A-1/B-1
A-2/B-2
A-4./B-4
A-3/B-6
A-12/END OF 8
A-13/B-10
END OF A & B
NORTHING
2,002.867.50
2.002,956.22
2.003,689.26
2,005,325.08
2,007,467.90
2.002,926.60
2.002,899.66
EASTING
6,225,430.80
6,225,545.81
6.225.631.26
6,225,526.42
6.225,549.39
6,225.540.07
6.225.558.26
INTERCEPTOR SEWER
BASELINE TRAVERSE
ITEM
(1)
<2)
<3>
®
<5>
(6)
FROM
MANHOLE
A-1/B-1
A-2/B-2
A-4/B-4
A-9/B-6
A-13/B-10
END OF A & B
TO
MANHOLE
A-2/B-2
A-4/B-4
A-9/B-6
A-12/END OF B
A-2/B-2
A-13/B-10
FROM
STATION
43+00.23
44+45.48
57+55.27
77+29.25
0+92.50
0+60.00
TO
STATION
44+45.48
57+55.27
77+29.25
98+72.19
1+22.68
0+92.50
BEARING
N 52' 21' 10.80" E
N 55' 58' 04.00' E
N 34' 02' 06.70" W
N 00' 36' 51.12" W
S 10" 58' 04.00" W
S 34' 01' 55.90" E
DISTANCE
(FEET)
145.25
1.309.79
1,973.98
2.142.94
30.18
32.50
NOTE: STATION EQUATION: STA +4+4S.48 - STA 1+22.68
MATCH 'lr
UPPER
RIGHT
INTERCEPTOR SEWER
(EXCAVATED AREA)
nu fatinri a
JEFFERSON
MSTA/CARLSBAD INTERCEPTOR SEWER
REPLACEMENT PROJECT REACH VCSA
PLAN
NOT TO SCALE
MAUQOLM
PIRNIE mw
CM)
DWA
TLS
Carlsbad Municipal Water District
5950 El Camlno Real
Carlsbad, California 92008
phone: (760) 438-3367
DISTRICT APPROVED CHANGES
Description Approvad Data
BENCH MARK
Description: frr JHEET 1
Location: .
Record Form; _
Elevation:
LEGEND
HV-1
CONTROL A 1350.00
EDGE OF CONC.
EDGE OF ASPH.
BUILDING
SIDEWALK
CURB AND GUTTER -•
FENCE
RAILROAD H
RAIL SIGNAL
DROP INLET
VALVE
CATCH BASIN
FIRE HYDRANT
MANHOLE
SIGN
POWER POLE
GUY WIRE
POWER POLESTREET UGHT
TRAFFIC UGHTSTREET UGHT
TREES(EXIST * NEW)
SINGLE TREE
(EXIST Ic NEW)
V-l
' 1330.00
-| a .-i-i-
CARLSBAD MUNICIPAL WATER DISTRICT,
Sheet
1
1
Snset
VISTA/CARLSBAD INTERCEPTOR SEWER
REPLACEMENT PROJECT, REACHES VC5B-VC9
and OAK AVENUE STORM DRAIN
Rgure 3-1
DETAILED SITE PLAN
k) Vehicle storage and service areas
Construction vehicles will typically be stored and serviced at an off-site
location to be determined by the Contractor. Contractor will be responsible
for ensuring the proper handling and clean-up of hazardous materials.
1) Areas of existing vegetation
The existing vegetation within the project area is minimal due to the
roadway location. The westerly section of sewer on Oak Avenue will be
the only portion of the project site area in existing vegetation.
In addition to sediment, there may be other possible pollutants on site. It is
anticipated that the following toxic materials will be stored or used at the project site during
construction:
• diesel fuel
• gasoline
• various miscellaneous lubrication greases and oils
• hydraulic fluid
During refueling and other maintenance activities, it is the Contractor's responsibility
to ensure that care is taken to avoid spilling, dumping, or disposing of any toxic materials
on the construction site. Any additional materials that may be used at the construction site
will be located outside areas of storm water drainage to minimize the contact of the
construction materials with storm water. Wherever practical, construction materials will be
stored on pallets or other raised platforms to avoid contact with storm water. All
construction debris will be disposed of off site at an approved location in accordance with
Federal, State, and local regulations.
Material storage areas, equipment storage, cleaning, and maintenance areas will be
limited to areas outside of the immediate project site. The Contractor will be responsible for
securing an off-site location for excavated soil storage and for implementing the storm water
control practices recommended in Appendix C. The contractor shall provide fill material
consisting of either the previously excavated soil or new backfill of a similar nature.
Bentonite is another potential storm water pollutant likely to be found on site.
Typical housekeeping measures such as containing all spills, following on site clean-up
procedures and following acceptable disposal procedures will deter its presence in the
stormwater discharge.
3325-001 3-5
3.6 EROSION AND SEDIMENT CONTROL
Erosion and consequent sediment transport due to storm water runoff is not an
anticipated problem at this site, since the majority of construction will take place within
concrete roads with vertical, supported trenching. Much of the extended site area relies on
the surface drainage of stormwater. Therefore, an acceptable control method will be used
on site to route any influent stormwater drainage around the site in order to deter storm
water penetration. There are no existing storm drain curb intakes within a mile of the
project site, thus it is not feasible to instigate control measures at those locations.
Housekeeping procedures such as weekly street cleaning and site clean-up will minimize
sediment transport from within the site.
Examples of the Best Management Practices (BMP) erosion control devices to be
used during construction are included in Appendix C. The Contractor is responsible for
preventing the transport of sediment to the open drainage trench by utilizing the appropriate
BMPs for the site specific and seasonal conditions.
3.7 NON-STORM WATER MANAGEMENT
The General Permit requires the Contractor to minimize or eliminate all non-storm
water discharges from the construction site unless otherwise permitted. Construction
dewatering may be required for this project, in which case an appropriate dewatering
discharge permit will be obtained. Dewatering operations for the sewer interceptor
replacement will be discharged to the sanitary sewer system.
3.8 POST-CONSTRUCTION STORM WATER MANAGEMENT
Post-construction storm water control should be minimal in this project. The sewer
and storm drain excavations will be backfilled and covered with concrete. Thus, erosion
control and sediment transfer due to stormwater should be insignificant. The Contractor
shall continue to use sand bag dikes or similar control device until the repaving effort is
3325-001 3-6
complete. Inspection of these control practices shall be accomplished before and after a
storm event to ensure adequate protection is present.
3.9 WASTE MANAGEMENT AND DISPOSAL
The Contractor shall ensure that all wastes (including equipment maintenance waste)
are disposed of in compliance with Federal, State, and Local laws, regulations, and
ordinances.
3.10 MAINTENANCE, INSPECTION, AND REPAIR
The Contractor shall conduct maintenance and repair inspections to ensure that all
grade surfaces and erosion and sediment control measures used during and after construction
are maintained in good and effective condition and are promptly repaired or restored.
3.11 TRAINING
The Contractor shall ensure that all personnel conducting inspections as required by
Section 4, "Monitoring Program and Reporting Requirements," of the General Permit are
properly trained. In addition, maintenance and repair activities shall also be conducted by
trained personnel.
3.12 LIST OF CONTRACTORS AND SUBCONTRACTORS
The Contractor shall submit a list of all contractors and subcontractors responsible
for implementing the SWPPP and for developing and implementing the Monitoring Program
and Reporting Requirements of the General Permit to the Owner. This list shall be
incorporated into this SWPPP and recorded in the Record of Changes in Appendix D.
3325-001 3-7
4.0 MONITORING PROGRAM AND
REPORTING REQUIREMENTS
4.1 OBJECTIVE
This Monitoring and Reporting Program has been developed to cover the General
Permit requirements for construction of the Vista/CMWD Interceptor Sewer and Storm
Drain. It is the dischargers responsibility to conduct visual inspections before and after
storm events and to annually certify they are in compliance with the general permit and their
SWPPP.
4.2 REQUIRED CHANGES
The Regional Water board may require the discharger to conduct additional site
inspections, submit reports and certifications, or to perform sampling and analysis.
4.3 SITE INSPECTION
Dischargers shall conduct inspections of the construction site on a regular basis
during November 1 to April 15, prior to and after storm events. The discharger shall identify
areas contributing to a discharge of storm water associated with construction activity, and
to evaluate whether control practices are adequate and properly implemented with terms of
the general permit, or if additional control practices are required. A record of the inspection
must include the date of inspection, individual(s) who performed the inspection, and the
observations. A copy of the inspection checklist which should be used is included in
Appendix E.
4.4 COMPLIANCE CERTIFICATION
Each discharger must annually certify its compliance with the requirements of the
general permit and the associated SWPPP. The certification must be based on site
inspections and be completed on July 1 of each year.
3325-001 4-1
4.5 NONCOMPLIANCE REPORTING
Dischargers who cannot certify compliance or who have had other instances of
noncompliance must notify the appropriate Regional Water Quality Control Board. The
notification shall include the type(s) of noncompliance, describe actions necessary to achieve
compliance and include a time schedule indicating when compliance will be achieved. These
notifications must be submitted within 30 days of identification of noncompliance.
4.6 MONITORING REPORTS
Records of all inspections, compliance certifications, and noncompliance reporting
must be retained for at least three years. With the exception of noncompliance reporting,
dischargers are not required to submit these records.
3325-001 4-2
APPENDIX A
GENERAL CONSTRUCTION ACTIVITY STORM WATER PERMIT
STATE WATER RESOURCES CONTROL BOARD (STATE WATER BOARD)
ORDER NO. 92-08 DWQ
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES)
GENERAL PERMIT NO. CAS000002
WASTE DISCHARGE REQUIREMENTS (WDRS)
FOR
DISCHARGES OF STORM WATER RUNOFF ASSOCIATED WITH CONSTRUCTION ACTIVITY
The State Water Board finds that:
1. Federal regulations for controlling pollutants in storm
water runoff discharges were issued by the U.S.
Environmental Protection Agency (USEPA) on November 16, 1990
(40 Code of Federal Regulations (CFR) Parts 122, 123, and
124). The regulations require discharges of storm water
associated with construction activity including clearing,
grading, and excavation activities (except operations that
result in disturbance of less than five acres of total land
area and which are not part of a larger common plan of
development or sale)1 to obtain a NPDES, permit and to
implement Best Available Technology Economically Achievable
(BAT) and Best Conventional Pollutant Control Technology
(BCT) to reduce or eliminate storm water pollution.
2. This general permit shall regulate pollutants in discharges
of storm water associated with construction activity (storm
water discharges) except from those areas on Indian lands,
the Lake Tahoe Hydrologic Unit, and where the storm water
discharge is determined ineligible for coverage under this
general permit by the California Regional Water Quality
Control Boards (Regional Water Boards). Attachment 1
contains addresses and telephone numbers of each Regional
Water Board office.
3. 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
separate storm sewer systems or other watercourses within
their jurisdiction, as allowed by State and Federal law.
4. To obtain authorization for current and future storm water
discharges pursuant to this general permit, the owner of a
site where construction activity occurs (discharger) must
submit a Notice of Intent (NOI) and appropriate fee to the
State Water Board. Dischargers who submit a NOI and
JIn a recent ruling, the Ninth Circuit Court of Appeals invalidated the
exemption granted by USEPA for storm water discharges from soil disturbances less
than five acres but remanded to USEPA for further action. This general permit
may be reopened, as necessary, to accommodate a redefinition of the types of
storm water discharges that must be permitted.
appropriate fee are authorized to discharge storm water
under the terms and conditions of this general permit.
5. If an individual NPDES permit is issued to a discharger
otherwise subject to this general permit, or an alternative
general permit is subsequently adopted which covers storm
water discharges regulated by this general permit, the
applicability of this general permit to such discharges is
automatically terminated on the effective date of the
individual permit or the date of approval for coverage under
the subsequent general permit.
6. This action to adopt a NPDES permit is exempt from the
provisions of the California Environmental Quality Act
(Public Resources Code Section 21100, et seq.), in
accordance with Section 13389 of the California Water Code.
7. The State Water Board adopted the California Ocean Plan on
March 22, 1990 and the California Inland Surface Waters Plan
and Enclosed Bays and Estuaries Plan on April 11, 1991. In
addition, the Regional Water Boards have adopted and the
State Water Board has approved Water Quality Control Plans
(Basin Plans). Dischargers regulated by this general permit
must comply with the water quality standards in these Plans
and subsequent amendments thereto.
8. It is not feasible at this time to establish numeric
effluent limitations for pollutants in storm water
discharges from construction activities. Instead, the
provisions of this general permit that require
implementation of Best Management Practices (BMPs) to
control and abate the discharge of pollutants in storm water
discharges constitute compliance with BAT/BCT requirements
and with requirements to achieve water quality standards.
9. Discharges of non-storm water may be necessary for the
practical performance and completion of certain construction
projects. Such discharges include, but are not limited to:
landscape irrigation of erosion control measures, pipe
flushing and testing, street washing, and dewatering. Such
discharges are allowed under this general permit so long as
they comply with BMPs as described in the Storm Water
Pollution Prevention Plan and they do not cause or
contribute to violation of any water quality standard.
10. Following adoption of this general permit, the Regional
Water Boards shall enforce the provisions of this general
permit including the monitoring and reporting requirements.
-3-
11. Following public notice in accordance with State and Federal
laws and regulations, the State Water Board in a public
meeting held May 14, 1992 heard and considered all comments.
The State Water Board has prepared written responses to all
significant comments.
12. This Order is a NPDES permit in compliance with Section 402
of the Clean Water Act (CWA) and shall take effect upon
adoption by the State Water Board.
13. This general permit does not authorize discharges of fill or
dredged material regulated by the U.S. Army Corps of
Engineers under CWA Section 404 and does not constitute a
waiver of water quality certification under CWA Section 401.
IT IS HEREBY ORDERED that all dischargers who file a Notice of
Intent (NOI) indicating their intention to be regulated under the
provisions of this general permit shall comply with the
following:
A. DISCHARGE PROHIBITIONS:
1. Discharges of material other than storm water, which are
not otherwise regulated by a NPDES permit, to a separate
storm sewer system or waters of the nation are prohibited,
except as allowed in Provision C.3.
2. Storm water discharges shall not cause or threaten to
cause pollution, contamination, or nuisance.
3. Storm water discharges regulated by this general permit
shall not contain a hazardous substance equal to or in
excess of a reportable quantity listed in 40 CFR Part 117
and/or 40 CFR Part 302.
B. RECEIVING WATER LIMITATIONS:
1. Storm water discharges to any surface or ground water
shall not adversely impact human health or the
environment.
2. Storm water discharges shall not cause or contribute to a
violation of any applicable water quality standards
contained in the California Ocean Plan, Inland Surface
Waters Plan, Enclosed Bays and Estuaries Plan, or the
applicable Regional Water Board's Basin Plan.
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C. SPECIAL-PROVISIONS FOR CONSTRUCTION ACTIVITY:
1. All dischargers must file a NOI and appropriate fee for
construction activities conducted at each site as required
by Attachment 2: Notice of Intent—General Instructions.
2. All dischargers must develop and implement a Storm Water
Pollution Prevention Plan in accordance with Section A:
Storm Water Pollution Prevention Plan (SWPPP).
3. Discharges of non-storm water are allowed only when
necessary for performance and completion of construction
projects and where they do not cause or contribute to a
violation of any water quality standard. Such discharges
must be described in the SWPPP. Wherever feasible,
alternatives which do not result in discharge of non-storm
water shall be implemented, in accordance with Section A.7
of the SWPPP requirements.
4. All dischargers must develop and implement a monitoring
program and reporting plan in accordance with Section B:
Monitoring Program and Reporting Requirements.
5. All dischargers must comply with the lawful requirements
of municipalities, counties, drainage districts, and other
local agencies regarding discharges of storm water to
separate storm sewer systems or other watercourses under
their jurisdiction, including applicable requirements in
municipal storm water management programs developed to
comply with NPDES permits issued by the Regional Water
Boards to local agencies.
6. All dischargers must comply with the standard provisions
and reporting requirements contained in Section C:
Standard Provisions.
7. The discharger may revoke (cancel) coverage under this
general permit by submitting to the State Water Board
certification, in accordance with the signatory
requirements of Section C: Standard Provisions, Items 9
and 10, that construction activity has been completed,
that all elements of the SWPPP have been completed, that
construction and equipment maintenance waste have been
disposed of properly, that the site is in compliance with
all local storm water management requirements including
erosion/sediment control requirements., policies, and
guidelines. In addition, a discharger may revoke
(cancel) coverage under this general permit when ownership
of all or a portion of the project has been transferred.
The new owner must comply with the provisions of Section
— 5 —
A(2)(c) and B(3)(b) of this general permit. The
revocation should accompany the NOI from the new owner
when possible.
8. This general permit will expire on August 20, 1997. Upon
reissuance of a NPDES general permit by the State Water
Board, dischargers subject to the reissued general permit
may be required to file a revised NOI.
D. REGIONAL WATER BOARD AUTHORITIES:
1. Following adoption of this general permit, Regional Water
Boards shall:
a. Implement the provisions of this general permit.
Implementation of this general permit may include, but
is not limited to, reviewing'SWPPPs, reviewing
monitoring reports, conducting compliance inspections,
and taking enforcement actions.
b. Issue permits as them deem appropriate to individual
dischargers, categories of dischargers, or dischargers
in a geographic area. Upon issuance of such permits by
a Regional Water Board, the affected dischargers shall
no longer be regulated by this general permit.
2. Regional Water Boards may provide guidance to dischargers
on SWPPP and Monitoring Program implementation.
3. Regional Water Boards may require dischargers to retain
records for more than three years.
4. Regional Water Boards may require additional monitoring
and reporting program requirements.
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CERTIFICATION
The undersigned, Administrative Assistant to the State Water
Board, does hereby certify that the foregoing is a full, true,
and correct copy of an order duly and regularly adopted at a
meeting of the State Water Resources Control Board held on August
20, 1992.
AYE: W. Don Maughan
Eliseo M. Samaniego
Marc Del Piero
James M. Stubchaer
NO: None
ABSENT: John Caffrey
ABSTAIN:: None
/s/
Maureen Marche'
Administrative Assistant to the Board
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Section A: • STORM WATER POLLUTION PREVENTION PLAN
1. Objectives
A Storm Water Pollution Prevention Plan (SWPPP) shall be
developed and implemented for each construction site covered
by this general permit. The SWPPP shall be certified in
accordance with the signatory requirements of Standard
Provision C.9. The SWPPP shall be developed and amended,
when necessary, to meet the following objectives:
a. To identify pollutant sources that may affect the quality
of discharges of storm water associated with construction
activity (storm water discharges) from the construction
site, and
b. To identify, construct, and implement storm water
pollution prevention measures (control practices) to
reduce pollutants in storm water discharges from the
construction site both during construction and after
construction is completed.
2. Implementation Schedule
a. For construction activity commencing on and after October
1, 1992, the SWPPP must be developed and implemented
concurrent with commencement of construction activities.
b. For construction activity commencing prior to and
continuing beyond October 1, 1992, the SWPPP must be
developed and implemented by October 1, 1992.
c. For ongoing construction activity involving a change of
ownership of property covered by this general permit, the
new owner must accept and maintain the existing SWPPP.
3.. Availability
The SWPPP shall be kept on site during construction activity
and made available upon request of a representative of the
Regional Water Board and/or local agency.
4. Required Changes
a. The discharger shall amend the SWPPP whenever there is a
change in construction or operations which may affect the
discharge of significant quantities of pollutants to
surface waters, ground waters, or a municipal separate
storm sewer system. The SWPPP should also be amended if
it is in violation of any condition of this general
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permit or has not achieved the general objective of
reducing pollutants in storm water discharges.
b. The Regional Water Board, or local agency with the
concurrence of the Regional Water Board, may require the
discharger to amend the SWPPP.
5. Source Identification
The SWPPP shall provide a description of potential sources
which are likely to add significant quantities of pollutants
to storm water discharges or which may result in non-storm
water discharges from the construction site. The SWPPP
shall include, at a minimum, the following items:
a. A map extending approximately one-quarter mile beyond the
property boundaries of the construction site showing:
the construction site, surface water bodies (including
known springs and wetlands2) , known wells, an outline of
off-site drainage areas that discharge into the
construction site, general topography, and the
anticipated discharge location (s) where the construction
site's storm water discharges to a municipal storm sewer
system or other water body. The requirements of this
paragraph may be included in the site map required under
the following paragraph if appropriate.
b. A site map(s) showing:
i. Location of control practices used during
construction;
ii. Areas used to store soils and wastes;
iii. Areas of cut and fill;
iv. Drainage patterns and slopes anticipated after major
grading activities are completed;
v. Areas of soil disturbance;
vi. Surface water locations;
vii. Areas of potential soil erosion -where control
practices will be used during construction;
viii. Existing and planned paved areas and buildings;
2The determination of whether wetlands exist shall be made by the person who
prepares the SWPPP and shall not be binding upon any other person.
ix. Locations of post-construction control practices;
x. An outline of the drainage area for each on-site
storm water discharge point;
xi. Vehicle storage and service areas; and
xii. Areas of existing vegetation.
c. A narrative description of the following:
i. Toxic materials that are known to have been treated,
stored, disposed, spilled, or leaked in significant
quantities onto the construction site;
ii. Practices to minimize contact of construction
materials, equipment, and vehicles with storm water;
iii. Construction material loading, unloading, and access
areas;
iv. Preconstruction control practices (if any) to reduce
sediment and other pollutants in storm water
discharges;
v. Equipment storage, cleaning, and maintenance areas;
vi. Methods of on-site storage and disposal of
construction materials; and
vii. The nature of fill material and existing data
describing the soil on the construction site.
d. A list of pollutants (other than sediment) that are
likely to be present in storm water discharges in
significant quantities. Describe the control practices
(if different from Item 6 below) appropriate to reduce
these pollutants in the storm water discharges.
e. An estimate of the size of the construction site (in
acres or square feet), an estimate of the runoff
coefficient of the construction site before and after
construction, and an estimate of the percentage of the
area of the construction site that is impervious (e.g.,
pavement, buildings, etc.) before and after construction.
f. A copy of the NOI.
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6. Erosion and Sediment Control
The SWPPP shall include:
a. A description of soil stabilization practices. These
practices shall be designed to preserve existing
vegetation where feasible and to revegetate open areas as
soon as feasible after grading or construction. In
developing these practices, the discharger shall
consider: temporary seeding, permanent seeding,
mulching, sod stabilization, vegetative buffer strips,
protection of trees, or other soil stabilization
practices. At a minimum, the operator must implement
these practices on all disturbed areas during the rainy
season.
b. A description or illustration of control practices which,
to the extent feasible, will prevent a net increase of
sediment load in storm water discharge. In developing
control practices, the discharger shall consider a full
range of erosion and sediment controls such as detention
basins, straw bale dikes, silt fences, earth dikes, brush
barriers, velocity dissipation devices, drainage swales,
check dams, subsurface drain, pipe slope drain, level
spreaders, storm drain inlet protection, rock outlet
protection, sediment traps, temporary sediment basins, or
other controls. At a minimum, sandbag dikes, silt
fences, straw bale dikes, or equivalent controls
practices are required for all significant sideslope and
downslope boundaries of the construction area. The
discharger must consider site-specific and seasonal
conditions when designing the control practices.
c. Control practices to reduce the tracking of sediment onto
public or private roads. These public and private roads
shall be inspected and cleaned as necessary.
d. Control practices to reduce wind erosion.
7 . Non-Storm Water Management
The SWPPP shall include provisions which eliminate or reduce
to the extent feasible the discharge of materials other than
storm water to the storm sewer system and/or receiving
waters. Such provisions shall ensure, to the extent
feasible, that no materials are discharged in quantities
which will have an adverse effect on receiving waters.
Materials other than storm water that are discharged shall
be listed along with the estimated quantity of the
discharged material.
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8. Post-Construction Storm Water Management
The SWPPP shall describe the control practices to reduce
pollutants in storm water discharges after all construction
phases have been completed at the site. These must be
consistent with all local post-construction storm water
management requirements, policies, and guidelines. The
discharger must consider site-specific and seasonal
conditions when designing the control practices. Operation
and maintenance of control practices after construction is
completed shall be addressed, including short- and long-term
funding sources and the responsible party.
9. Waste Management and Disposal
All wastes (including equipment maintenance waste) disposed
at the site or removed from the site for disposal shall be
disposed of in compliance with Federal, State, and local
laws, regulations, and ordinances.
10. Maintenance, Inspection, and Repair
The SWPPP shall include maintenance, inspections, and repair
procedures to ensure that all grade surfaces, walls, dams
and structures, vegetation, erosion and sediment control
measures, andr other protective devices identified in the
site plan are maintained in good and effective condition and
are promptly repaired or restored.
11. Training
The SWPPP shall include procedures to ensure that all
inspections required in Section B.4 of the Monitoring
Program and Reporting Requirements of this general permit
and maintenance and repair required in Paragraph 10 of this
Section are done by trained personnel.
12. List of Contractors/Subcontractors
The SWPPP shall include a list of all contractors (or
subcontractors) responsible for implementing the SWPPP.
13. Other Plans
This SWPPP may incorporate, by reference, the appropriate
elements of other plans required by local, State, or Federal
agencies. A copy of any requirements incorporated by
reference shall be kept at the construction site.
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14. Public- Access
The SWPPP is considered a report that shall be available to
the public under Section 308(b) of the CWA. Upon request by
members of the public, the discharger shall make available
for review a copy of the SWPPP either to the Regional Water
Board or directly to the requester.
15. Preparer
The SWPPP shall include the signature and title of the
person responsible for preparation of the SWPPP and include
the date of initial preparation and each amendment, thereto.
Section B: MONITORING PROGRAM AND REPORTING REQUIREMENTS
1. General
Dischargers are required to conduct inspections before and
after storm events and to annually certify that they are in
compliance with the general permit and their SWPPP. Other
than reporting incidents of noncompliance, dischargers are
not required to submit reports or certifications.
2. Required Changes
The Regional Water Board may require the discharger to
conduct additional site inspections, submit reports and
certifications, or to perform sampling and analysis.
3. Implementation
a. The requirements of this Section shall be implemented by
October 1, 1992 or commencement of the construction
activity. The discharger is responsible for implementing
these requirements until construction activity is
complete.
b. For ongoing construction activity involving a change in
ownership of property covered by this general permit, the
new owner must implement the requirements of this Section
concurrent with the change of ownership.
4. Site Inspections
Dischargers shall conduct inspections of the construction
site prior to anticipated storm events and after actual
storm events to identify areas contributing to a discharge
of storm water associated with construction activity and to
evaluate whether control practices to reduce pollutant
loadings identified in the SWPPP are adequate and properly
-12-
implemented in accordance with the terms of the general
permit or whether additional control practices are needed.
A record of the inspections must include the date of the
inspection, the individual(s) who performed the inspection,
and the observations.
5. Compliance Certification
Each discharger must annually certify that its construction
activity is in compliance with the requirements of this
general permit and its SWPPP. This certification should be
based upon the site inspections required in Paragraph 4 of
this Section. The first certification must be completed by
July 1, 1993, and each July 1 thereafter.
6. Noncompliance Reporting
Dischargers who cannot certify compliance, in accordance
with Paragraph 5 of this Section and/or who have had other
instances of noncompliance, must notify the appropriate
Regional Water Board. The notifications shall identify the
type(s) of noncompliance, describe the actions necessary to
achieve compliance, and include a time schedule, subject to
the modifications by the Regional Water Board, indicating
when compliance will be achieved. Noncompliance
notifications must be submitted within '30 days of
identification of noncompliance.
7. Monitoring Records
Records of all inspections, compliance certifications, and
noncompliance reporting must be retained for a period of at
least three years. With the exception of noncompliance
reporting, dischargers are not required to submit these
records. •
Section C: STANDARD PROVISIONS FOR CONSTRUCTION ACTIVITY
1. Duty to Comply
The discharger must comply with all of the conditions of
this general permit. Any permit noncompliance constitutes a
violation of the CWA and the Porter-Cologne Water Quality
Control Act and is grounds for enforcement action and/or
removal from general permit coverage.
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
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general permit has not yet been modified to incorporate the
requirement.
2. General Permit Actions
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 stay any
general permit condition.
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
Clean Water Act 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 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.
4. 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.
5. 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 and with the requirements of storm water
pollution prevention plans. 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.
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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 any infringement of Federal, State, or local
laws or regulations.
7. Duty to Provide Information
The 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 discharger shall also furnish, upon
request, copies of records required to be kept by this
general permit.
8. Inspection and Entry
The 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. Have access to and copy at reasonable times, any records
that must be kept under the conditions of this general
permit;
c. Inspect at reasonable times the construction site and the
related erosion/sediment controls; and
d. Sample or monitor at reasonable times for the purpose of
ensuring general permit compliance.
9. Signatory Requirements
a. All Notices of Intent submitted to the State Water Board
shall be signed as follows:
1. For a corporation: by 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
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"corporation in charge of a principal business
function, or any other person who performs similar
policy or decision-making functions for the
corporation, or (b) the manager of the construction
activity 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: by a
general partner or the proprietor, respectively; or
3. For a municipality, State, Federal, or other public
agency: by either a principal executive officer,
ranking elected official, or duly authorized
representative. The principal executive officer of a
Federal agency includes the chief executive officer of
the agency or the senior executive officer having
responsibility for the overall operations of a
principal geographic unit of the agency (e.g.,
Regional Administrators of USEPA).
b. All storm water pollution prevention plans, reports,
certifications, or other information required by the
general permit and/or requested by the Regional Water
Board, State Water Board, USEPA, or the local storm water
management agency shall be signed by a person described
above or by a duly authorized representative. A person
is a duly authorized representative if:
1. The authorization is made in writing by a person
described above and retained as part of the SWPPP;
2. The authorization specifies either an individual or a
position having responsibility for the overall
operation of the construction activity, such as the
position of manager, operator, superintendent, or
position of equivalent responsibility, or an
individual or position having overall responsibility
for environmental matters for the company. (A duly
authorized representative may thus be either a named
individual or any individual occupying a named
position.); and
3. If an authorization is no longer accurate because a
different individual or position has responsibility
for the overall operation of the construction
activity, a new authorization must be attached to the
SWPPP prior to submittal of any reports, information,
or certifications to be signed by the authorized
representative.
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10. Certification
Any person signing documents under Provision 8 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, 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."
11. Anticipated Noncompliance
The discharger will 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 discharger is or may be subject under
Section 311 of the CWA.
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
-17-
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 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
$25,000 per 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. Availability
A copy of this general permit shall be maintained at the
construction site during construction activity and be
available to operating personnel.
18. Transfers
This general permit is not transferable. A new owner of an
ongoing construction activity must submit a NOI in
accordance with the requirements of this general permit to
be authorized to discharge under this general permit. An
owner who sells property covered by this general permit
shall inform the new owner of the duty to file a NOI and
shall provide the new owner with a copy of this general
permit.
19. Continuation of Expired Permit
This general permit continues in force and effect until a
new general permit is issued or the State Water Board
rescinds this general permit. Only those dischargers
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authorized to discharge under the expiring general permit
are covered by the continued general permit.
APPENDIX B
NOTICE OF INTENT
State of California
State Water Resources Control Board
NOTICE OF INTENT
TO COMPLY WITH THE TERMS OF THE
GENERAL PERMIT TO DISCHARGE STORM WATER
ASSOCIATED WITH CONSTRUCTION ACTIVITY (WQ ORDER No. 92-08-DWQ )^muty
MARK ONLY
ONE ITEM
1. [ J
2. IX)
Ongoing Construction
New Construction
3. [ ] Change of Information
WDID #
I. OWNER
Name
|C|A|R|L $ |B|A|D| |M| U| N| |W|T|R| |D
Local Mailing Address
|5 |9 15 I Q I El Ll 1C IA IM I IlNlOl IRI B
City
1C IA !R !L S I BIAIDI I I I I I I I I I
II I S|
A LJ I
State
C I A
T| I I
I I I
Zip
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Contact Person
|B|I|L|L| |P |L
Title
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OI8H 1 1 1 I
UlMlMlEiRi 1 1 1 I | |
ff 1 IEINIG II IN E 1 EIRI 1
Phone
1 7I6IOH4 1 31 8H 3 13 16 17 1
II. CONSTRUCTION SITE INFORMATION
A. Developer CONTRACT HAS NOT BEEN BID YET.
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Local Mailing Address
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 III 1
City State
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Zip
1 1 1
B. Site Address
i J B F| F| EiRiSlOlN 1 lSlTl.1 l&l 10 1 Al Kl lAlVEl.
State
.. IA IR L 1 SlBlAlDl 1 1 1 1 1 1 1 1 1 C 1 A
C. Is the construction site part of a larger common plan If yes,
of development or sale? [ ] Yes [X] No | |
Contact Person
1 1 1 1 1 II 1 1 1 1 1 1 1 1 1 II 1
Title
II II 1 1 1 1 II 1 1 1 1 1 1 1 1 1
Phone
1 l-l 1 1 II III l-l 1 1 H 1 1 1 1
County
ISIAINI 1 D II El 6101 1 1 1 1 1 1 1 1 1
Zip Phone
19 210 1018 H 1 1 1 1 III H Ill-Mill
name of plan
1 1 1
or development
1 1 1 II 1 1 1 1 1 1 1 1 1 1 1 1 1 1
MMDDYY MMDDYY
D. Construction commencement date | 0| 4] 0|5|9 9| E. Projected construction completion date |!|2lOlll9l9l
III. BILLING ADDRESS
Send to:
w
t ]
OWNER [ ] DEVELOPER
OTHER (Enter information at right)
Name
1 ClAlRlLlS
Mailing Address
1 5|9|5|0|
City
1 ClAlRlLlS
IB IA ID
1 5 Ll
IB |A D
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State
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ITIEIR i 1
1 1 1 1 1
Zip
I9I2IOIO
DIIISITI. 1 1
1 II 1 1 1
1 fil-l 1 1 1 1
IV. RECEIVING WATER INFORMATION
A. Does your construction sites's storm water discharge to (Check one):
1. [X Storm drain system - Enter owners name | C| IlT|Yl | Q R | C| A| Rl LlSlR lA iD I I I | [ f I—I—I—L
2. [ ] Directly to waters of U.S. (e.g., river, lake, creek, ocean)
3. [ ] Indirectly to waters of U.S. ^^
B. Name of closest receiving water | B U E| N| AI iVUlSlTlAl l&l IAIGIUIAI IH E I Dl 11 0 IN ID IA I M I Al (i If) If)'N. S
/""ATE USE ONLY
>.->ID:
II M I M I I
NPDES Permit Number:
CA
I
Regional Board Office
Order Number:Fee Amount Received:
s
Date Permit Issued:
| | | | | | I
Date NOI Received:
V. TYPE OF CONSTRUCTION (Check all that apply)
1. [ ] Residential 2. [ ] Commercial 3. [ ] Industrial 4. [ ] Reconstruction 5. [ ] Transportation
. [ ] Utility 99. (X Other (Please List)
I I|N|T|E|R|C |E |P |T |0|R| |S|E|W|E I R I I I I I I I |
VI. MATERIAL HANDLING/MANAGEMENT PRACTICES
A. Types of materials that will be handled and/or stored at the site: (Check all that apply)
1. [X Solvents 2. (XJ Metal 3. [ ^ Petroleum Products 4. [] Plated Products
5. [XI Asphalt Concrete 6. [Xi Hazardous Substance 7. Q(] Paints 8. [ X Wood Treated Products
99. [ ] Other (Please list)
I I I- I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
B. Identify proposed management practices to reduce pollutants in storm water discharges: (Check all that apply)
1. [ ] Oil/Water Separator 2. QQ Erosion Controls 3. XI Sedimentation Controls 4. [ ] Overhaead Coverage
5. [ ] Detention/Desiltation Pond 99. [ ] Other ( Please List)
I I I I I I I I i I I I I I I I I I I I I I I I I I I I I I
VII. SITE INFORMATION
A. Total size of construction site
5 Acres
B. Percent of site impervious (including rooftops)
Before construction 90 % After construction 90
VIII. REGULATORY STATUS
Is the site subject to a locally approved erosion/sediment control plan? [ ] Yes [XI No
If yes, name of local agency
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
IX. CERTIFICATIONS
I certify under penalty of law that this document and all attachments were prepared under my direction and 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, 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." In addition, I certify that the provisions of the permit, including the development and implementation of a
Storm Water Pollution Prevention Plan and a Monitoring Program Plan, will be complied with.
Printed Name: Bill Pluminer _ __
C / ^/Lst>*TT^^~ __ _ Date &~JQ' 9$ - . -Signature:
Tille. District Engineer
d:\permits\c_noi 1/95
California
Storm Water
Best Management Practice
Handbooks
Construction Activity
Best Management Practice
,..,.; Handbook
Industrial/Commercial
Best Management Practice
Handbook
Municipal
Best Management Practice
Handbook
Prepared by
Camp Dresser & McKee
Larry Walker Associates
Uribe and Associates
Resources Planning Associates
for
Sformwater Quality Task Force
ACTIVITY1 OUTDOOR STORAGE OF RAW MATERIALS, PRODUCTS,
AND BY- PRODUCTS
Applications
Manufacturing
f «••,
^Material Handling
^**~ — ' """^
Vehicle Maintenance
Construction
^=— _ -^
Commercial Activities"
Roadways
Waste Containment
" '.^Housekeeping Practices^
DESCRIPTION
Prevent or reduce the discharge of pollutants to storm water from outdoor material and
product storage areas by enclosing or covering materials, installing secondary contain-
ment, and preventing storm water runon.
APPROACH
• Protect materials from rainfall, runon, runoff and wind dispersal:
Store material indoors.
Cover the storage area with a roof.
Cover the material with a temporary covering made of polyethylene, polypro-
pylene, or hypalon.
Minimize storm water runon by enclosing the area or building a berm around the
area.
Use "doghouse" for storage of liquid containers.
• Parking lots or other surfaces near bulk materials storage areas should be swept
periodically to remove debris blown or washed from storage area.
• Install pellet traps at storm water discharge points where plastic pellets are loaded and
unloaded.
Keep liquids in a designated area on a paved impervious surface within a secondary
containment.
• Keep outdoor storage containers in good condition.
• Use berms and curbing.
• Use catch basin filtration inserts (Chapter 5, TC6, Media Filtration)
REQUIREMENTS
• Costs (Capital, O&M)
Costs should be low except where large areas may have to be covered.
• Maintenance
Berm and curbing repair and patching.
LIMITATIONS
• Space limitations may preclude storing some materials indoors.
• Some municipalities require that secondary containment areas (regardless of size) be
connected to the sanitary sewer, prohibiting any hard connections to the storm drain.
• Storage sheds often must meet building and fire code requirements.
Targeted Constituents
9 Sediment
O Nutrients
• Heavy Metals
0 Toxic Materials
O Floatable Materials
O Oxygen Demand-
ing Substances
9 Oil & Crease
O Bacteria & Viruses
W Ukely to Have
Significant Impact
O Probable Low or
Unknown Impact
Implementation
Requirements
O Capital Costs
O O&M Costs
O Maintenance
9 Training
High O Low
SC8
Best'
Management^
Practices'1
Industrial Handbook 4-28 March, 1993
Additional Information — Outdoor Storage of Raw Materials, Products, and By-Products
Raw materials, by-products, finished products, containers, and material storage areas exposed to rain and/or
runoff can pollute storm water. Storm water can become contaminated by a wide range of contaminants when
materials wash off or dissolve into water or are added to runoff by spills and leaks.
Paved areas should be sloped in a manner that minimize the pooling of water on the site, particularly with
materials that may leach pollutants into storm water and/or groundwater, such as compost, logs, and wood chips.
A minimum slope of 1.5 percent is recommended.
Curbing should be placed along the perimeter of the area to prevent the runon of uncontaminated storm water
from adjacent areas as well as runoff of storm water from the stockpile areas. The storm drainage system should
be designed to minimize the use of catch basins in the interior of the area as they tend to rapidly fill with manu-
facturing material. In these cases, consider the use of the catch basin insert filter described in Chapter 5, TC6
(Media Filtration). The area should be sloped to drain storm water to the perimeter where it can be collected or to
internal drainage alleyways where material is not stockpiled. If the raw material, by-product, or product is a
liquid, more information for outside storage of liquids can be found under SC6, Outdoor Container Storage of
Liquids.
Examples
The "doghouse" design has been used to store small liquid containers. The roof and flooring design prevent
contact with direct rain or runoff. The doghouse has two solid structural walls and two canvas covered walls.
The flooring is wire mesh about secondary containment. The unit has been used successively at Lockheed
Missile and Space Company in Sunnyvale.
REFERENCES
Best Management Practices for Industrial Storm Water Pollution Control, Santa Clara Valley Nonpoint Source
! Pollution Control Program, 1992.
Storm Water Management for Industrial Activities: Developing Pollution Prevention Plans, and Best Management
Practices, EPA 832-R-92-006, EPA, 1992.
Water Quality Best Management Practices Manual, City of Seattle, 1989.
SC8
Industrial Handbook 4 . 29 March, 1993
BMP: SAND BAG BARRIER Objectives
Housekeeping Practias
Contain Wasta
Uinimiz» Disturbed Areas
Stabitiza Disturbed Anas
tfpTect Sicpes/Cfannef.
^ Ptrimet
<£ontroJ Internal Erosjorfc)
GENERAL DEFINITION
Stacking sand bags along a level contour creates a barrier which detains sediment-laden
water, ponding water upstream of the barrier and promoting sedimentation.
SUITABLE APPLICATIONS
Along the perimeter of the site.
• Check dams across streams and channels.
• Along streams and channels.
Barrier for utility trenches in a channel.
• Across swales with small catchments.
• Division dike or berm.
Below the toe of a cleared slope.
Create a temporary sediment trap.
Around temporary spoil areas.
Below other smal] cleared areas.
INSTALLATION/APPLICATION CRITERIA
• May be used in drainage areas up to 5 acres.
• Install along a level contour.
• Base of sand bag barrier should be at least 4S inches wide.
• Height of sand bag barrier should be at least 18 inches high.
• 4 inch PVC pipe may be installed between the top layer of sand bags to drain large
flocd flows.
• Provide area behind barrier for runoff to pond and sediment to settle, size according to
sediment trap BMP criteria (ESC55).
Place below the toe of a slope.
• Use sand bags large enough and sturdy enough to withstand major flooding.
REQUIREMENTS
• Maintenance
Inspect after each rain.
Reshape or replace damaged sand bags immediately.
Remove sediment when it reaches six inches in depth,
• Cost
Sand bag barriers are more costly, but typically have a longer useful life
other barriers.
LIMITATIONS
• Sand bags are more expensive than other barriers, but also more durable.
• Burlap should not be used for sand bags.
Targeted Pollutants
9 Sediment
O Nutrients
O Toxic Materials
O Oil* Grease
O FSoatable Materials
O Other Construction
Waste
Uk»fy to Htv*
O Probtbh Low orUnknown Impact
Implementation
Requirements
Q Capital Costs
O O&M Costs
O Maintenance
O Training
Q Suitability for
Slope* >5X
• High O Low
ESC52
Best'
Management
Practices^
Construction Handbook 5-71 March, 1993
Additional Information — Sand Bag Barn'er
Suitable Applications
Sand bag benns may be used during construction activities in stream beds and utility construction in channels, temporary
channel crossing for construction equipment, etc. Sand bag benns may also be installed parallel to roadway construc-
tion. Sand bag benns may also be used to create temporary sediment traps, retention basins and in place of straw bales
or silt fences. Examples of applications include:
Check dams across stream channels.
• Barriers for utility trenches or other construction in a stream channel.
• At temporary channel crossings.
• May be used on a slope where straw bales and silt fences are not appropriate.
• As a diversion dike.
Embankment for a temporary sediment basin or retention basin.
• Sediment barriers near the toe of slopes.
• At construction perimeter.
Provides a semi-permeable barrier in potentially wet areas.
More permanent than silt fences or straw bales.
Allows for easy relocation on site to meet changing needs during construction.
Installation/Application
Sand bag barriers may be used for sediment trapping in locations where silt fences and straw bale barriers are not strong
enough. In addition, sand bag barriers are appropriate to use when construction of check dams or sumps in a stream is
undesirable. The sand bag benns can provide the same function as a check dam without disturbing the stream or
vegetation. The sand bag berm will also allow a small sediment retention area to be created prior to construction of final
detention basins. For installation of a sand bag bemij the following criteria should be observed:
• Drainage Area - Up to five (5) acres.
• Height of Berm - 18 inches minimum height, measured from the top of the existing ground at the upslope toe to the
top of the barrier.
• Width of Berm - 48 inches minimum width measured at the bottom of the barrier, 18 inches at the top.
Sand bag Size - Length 24 to 30 inches, width 16 to 18 inches and thickness six (6) to eight (8) inches. Weight 90 to
125 pounds.
• Sand bag Material - Polypropylene, polyethylene or polyamide woven fabric, minimum unit weight four (4) ounces
per square yard, mullen burst strength exceeding 300 psi and ultraviolet stability exceeding 70 percent. Use of
burlap is discouraged since it rots and deteriorates easily.
• Grade of Sand -Coarse sand, gravel.
• Runoff water should be allowed to flow over the tops of the sand bags or through four (4) inch polyvinyl chloride
pipes embedded below the top layer of bags. '
• Area behind the sand bag barrier should be established according to sizing criteria for sediment trap BMP (ESC55).
REFERENCES
Best Management Practices and Erosion Control Manual for Construction Sites, Rood Control District of Maricopa
County, Arizona, September 1992.
Water Quality Management Plan for the Lake Tahoe Region, Volume n. Handbook of Management
Practices, Tahoe Regional Planning Agency - November 1988.ESCS2
Construction Handbook 5 - 72 March, 1993
Additional Information — Sand Bag Barrier
18" MIN
22'
/•—6" MIN
/ DIAMETER ROCK
^vv_x-y v-4-y w-y ^— 4-y v-~ wQ. nQ. nQ. nQ.nQ.nC
48" MIN
CROSS-SECTION
WOVEN FABRIC SANDBAG FILLED WITH
COARSE SAND-MIN WEIGHT 40 LBS.
•4" PVC PIPE FOR DRAINAGE
DEPENDING ON FIELD CONDITIONS
24" MIN
FRONT VIEW
SAND BAG BERM.
ESCS2
Construction Handbook 5-73 March, 1993
BMP: STRAW BALE BARRIERS Objectives
racticas
Contain Wasta
Uinin\l29 Disturbed ATMS
Stabilize Disturbed Anas
Protect Slcpes/Ctennals
CCocfrcV Inttmal Eros/o?£>
GENERAL DEFINITION
A straw bale barrier consists of straw bales placed end to end along a level contour in a
shallow trench and staked to bold them in place. The barrier detains runoff, creating a pond
behind the barrier where sedimentation occurs.
SUITABLE APPLICATIONS
Along the perimeter of the site.
• Along streams and channels.
Across swales with small catchments.
• Around temporary spoil areas.
Below other small, cleared areas.
INSTALLATION/APPLICATION CRITERIA
• Use primarily in areas where sheet or rill Flow occurs.
• No more than 1/4 acre per 100 feet of barrier should drain to the barrier.
• Install along a level contour.
• Place in a 4-inch deep trench.
• Backfill and compact the excavated soil on the upstream face of the barrier.
Secure each bale with two stakes.
Leave enough area (about 1200 sq. ft per acre) behind the barrier for runoff to pond
(no more than 1 _5 ft. depth) and sediment to settle.
REQUIREMENTS
• Maintenance
Inspect weekly and after each rain.
Replace bales which have decomposed or whose bindings have broken.
Remove sediment behind the barrier when it reaches a depth of 6 inches.
• Costs (source: EPA, 1992)
Average annual cost for installation and maintenance (assumes 3 month useful
life): 517 per lineal foot (56,800 per drainage acre).
LIMITATIONS
Straw bale barriers are not to be used for extended periods of time because they tend to
rot and fall apart.
Suitable only for sheet flow on slopes of 2% or flatter.
Not appropriate for large drainage areas, limit to one acre or less.
• Straw bales lose their effectiveness rapidly due to retting, thus constant maintenance is
required.
• Not recommended for concentrated flow, inlet protection, channel flow, and live
streams.
• Bale bindings of jute or cotton not recommended.
Targeted Pollutants
0 Sediment
O Nutrients
O Toxic Materials
O Oil & Grease
O Floatable Materials
O Other Construction
Waste
• LJktly te H*v«
Significant lmp*ci
O Prot*t>h Low orUnknown Impact
Implementation
Requirements
0 Capital Coats
• OSM Costa
& Maintenance
O Training
O Suitibility for
Slopes >S%
High O Low
ESC51
Besr
Management
Practices'1
Construction Handbook 5-67 March, 1993
BMP: STRAW BALE BARRIERS (Continue)
Straw bale barriers have not been as effective as expected due to improper use. These barriers have been placed in
streams and drainageways where runoff volumes and velocities have caused tbe barriers to wash out. In addition,
failure to stake and entrench the straw bale has allowed undercutting and end flow.
ESCS1
Construction Handbook 5-68 March, 1993
Additional Information — Straw Bale Barrier
A straw bale barrier consists of a series of secured anchored bales placed to intercept sediment-laden runoff from small
drainage areas of disturbed soil. The barrier ponds runoff and allow sediment to settle. Straw bale dikes should not be
used for extended periods of time because they tend to roc and fall apart.
The straw bale barrier is used where there are no concentrations of water in a channel or drainageway, and where erosion
would occur from sheet flow. These barriers are typically constructed below disturbed areas subject to sheet flow of
runoff.
Installation/Annlication
Straw bale barriers should be used for drainage areas no more than 1/4 acre per 100 feet of barrier length, with no more
than 100 ft upstream of any point along the barrier. The barrier should be placed along a level contour no greater than
2:1. When installed and maintained according to the guidelines on this fact sheet, straw bale dikes remove approximately
67% of the sediment transported in construction site runoff. This optimum efficiency can only be achieved through
careful maintenance, with special attention to replacing rotted or broken bales. The barrier should be constructed on a
level contour to prevent concentration of flow against a small portion of the barrier.
An effective straw bale barrier should be installed in the following manner
1. Bales should be placed on the contour and in a row with ends tightly abutting the adjacent bales.
2. Leave area for runoff to pond upstream of the barrier by locating barrier away from the toe of slopes. This also
provides access for maintenance.
3. Each bale should be embedded in the soil a minimum of (4) inches and placed so the bindings are horizontal. Bind-
ings placed on soil will soon disintegrate and cause the barrier to fail.
4. Bales should be securely anchored in place by either two stakes or re-bars driven through the bale. The first stake in
each bale should be driven toward the previously laid bale at an angle to force the bales together. Stakes should be
driven flush with the bale.
5. Backfill and compact me excavated soil along the upstream face of the barrier.
6. Remove the barrier when it has served its usefulness so as not to block or impede storm flow or drainage.
'REFERENCES
(Best Management Practices and Erosion Control Manual for Construction Sites, Rood Control District of Maricopa
County, Arizona, September 1992.
"Draft - Sedimentation and Erosion Control, An Inventory of Current Practices", U.S.E.P.A., April, 1990.
"Environmental Criteria Manual", City of Austin, Texas.
Manual of Standards of Erosion and Sediment Control Measures, Association of Bay Area Governments, Jun 1981.
Proposed Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters, Work Group
Working Paper, USEPA, April. 1992.
Stormwater Management Water for the Puget Sound Basin, Washington State Department of Ecology, The Technical
Manual - February 1992, Publication # 91-75.
Water Quality for Construction Businesses, City of Bellevue, Washington.
Water Quality Management Plan for the Lake Tahoe Region, Volume n. Handbook of Management Practices, Tahoe
Regional planning Agency - November 1988.
ESCS1
Construction Handbook S -69 March, 1993
Additional Information — Straw Bale Barrier
COMPACTED BACKFILL ~ VERTICAL FACE
• PROMOTES ON SITE SEDIMENTATION
BY CREATING A TEMPORARY POND.
BEDDING DETAIL
ANGLE FIRST STAKE TOWAR
PREVIOUSLY LAID BALE
BACKFILL
BOUND BALES PLACED
ON CONTOUR
2 2"x2" STAKES 1 1/2' TO 2'
IN GROUND. DRIVE STAKES FLUSH
WITH BALES.
•TRENCH - 4" DEEP X WIDTH
OF BALE
SUBSTITUTION OF STEEL BARS FOR
WOODEN STAKES IS NOT RECOMMENDED DUE
TO POTENTIAL FOR DAMAGING CONSTRUCTION EQUIPMENT
ANCHORING DETAIL
STRAW BALE BARRIERS
ESC51
Construction Handbook 5-70 March, 1993
BMP:SILT FENCE Objectives
Housekeeping Practices
Contain Waste
Hinimiza Disturbed Anas
Stabilize Disturbed Anas
r
Site Perimet0
trd Internal Erosio
GENERAL DESCRIPTION
A silt fence is made of a filter fabric which has been entrenched, attached to supporting
poles, and sometimes backed by a wire fence for support. The silt fence detains sediment-
laden water, promoting sedimentation behind the fence.
I SUITABLE APPLICATIONS
• Along the perimeter of the site.
• Below the ic£ of a cleared slope.
' • Alcog streams and channels.
Around temporary spoil areas.
• Across swales with catchments less than 1 acre.
• Below other small cleared areas.
INSTALLATION/APPLICATION
Use principally in areas where sheet flow occurs,
• Install along:a level contour, so water does not pood more than 1.5 feet at any point.
• No more than 1 acre, 100 ft, or 0_5 cfs of concentrated flow should drain to any point
along the silt fence.
• Turn ends of fence uphill.
• Provide area behind the fence for runoff to pood and sediment to scale (approx. 1200
sq. ft per acre draining to the silt fence).
Select filter fabric which retains 85% of the soil, by weight, based on sieve analysis,
but is not finer than an equivalent opening size of 70.
REQUIREMENTS
Maintenance
Inspect weekly and after each rainfall,
Repair wherever fence is damaged.
Remove sediment when it reaches 1/3 the height of the fence.
• Cos: (source: EPA, 1992)
Average annual cost for installation and maintenance (assumes 6 month useful
life): S7 per lineal foot (S850 per drainage acre)
LIMITATIONS
• Do not use where 85% of the soil, by weight, passes through a No. 200 sieve because
tbe filter fabric will clog.
• Do not place fence on a slope, or across any contour line.
Do not use in streams, channels, or anywhere flow has concentrated.
• Do not use in locations where pcoded waxer may cause flooding.
Targeted Pollutants
O Sediment
O Nutrients
O Toxic Material*
Q Oil & Grease
O Floatable Material*
O Other Construction
Waste
• Ukfty to H*V9Significant impact
O ProtMdh Low orUnknown Itnptct
Implementation
Requirements
Q Capital Cost*
Q O&M Costs
Q Maintenance
O Training
O Suitability for
Slopes >5%
High O Low
ESC50
Best'
Management
Practices'1
Construction Handbook 5-62 March, 1993
Additional Information — silt Fence
A silt fence is a temporary sediment barrier consisting of filter fabric stretched across and attached to supporting posts,
entrenched, and, depending upon the strength of the fabric used, supported with wire fence. Silt fences trap sediment in
two ways: (1) by intercepting and detaining small amrnmts of sediment from disturbed areas during construction opera-
tions in order to promote sedimentation behind the fence; and (2) by decreasing the velocity of tow flows (up to 0.5 cfs)
in swales.
Silt fences may be used for perimeter control, placed upstream of the point(s) of discharge of sheet flow from a site.
They may also be used as interior controls below disturbed areas where runoff may occur in the form of sheet and rill
erosion, and perpendicular to minor swales or ditch lines for up to one acre contributing drainage areas. Silt fences are
generally ineffective in locations wbere the flow is concentrated and are only applicable for sheet or overland flows.
In.stallarion/Armlication
Planning:
Silt fences are generally most effective when the following placement criteria are followed:
• Limit the upstream drainage area to 1 acre or less when used alone or in combination widti sediment basin in a larger
site.
• The maximum slope perpendicular to the fence line should be 1:1.
Limit the maximum sheet or overland flow path length to any point along the fence to 100 feet.
• Limit the concentrated flows reaching the fence to 0.5 cfs.
Silt fences are preferable to straw barriers in many cases. Laboratory work at the Virginia Highway and Transportation
Research Council has shown that silt fences can trap a much higher percentage of suspended sediments than can straw
bales. While the failure rate of silt fences is lower than that of straw barriers, there are many instances wbere silt fences
have been improperly installed. The following installation methods can improve performance and should be followed:
• Construct the silt fence along a kvel contour.
• Silt fences should remain in place until the disturbed area is permanently stabilized.
• Provide sufficient room for runoff to pond behind the fence and to allow sediment removal equipment to pass
between the silt fence and toes of slopes or other obstructions. About 1200 sq. ft. of ponding area should be
provided for every acre draining to the fence.
• Turn the ends of the filter fence uphill to prevent storm water from flowing around the fence.
• Leave an undisturbed or stabilized area immediately downslope from the fence.
• Do not place in live streams or intermittently flowing channels.
Design:
Selection of a filter fabric is based oo soil conditions at the construction site (which affect the equivalent opening size
(EOS) fabric specification) and characteristics of the support fence (which affect the choice of tensile sffengtb). The
designer should specify a filter fabric that retains the soil found on the construction site yet will have openings large
enough to permit drainage and prevent clogging. The following criteria is recommended for selection of the equivalent
opening size:
1. If 50 percent or less of the soil, by weight, will pass the U.S. standard sieve No. 200, select the EOS to retain 85
percent of the soil. The EOS should not be finer than EOS 70.
2. For all other soil types, the EOS should be no larger than the openings in the U.S. Standard Sieve No. 70
[0.0083 in. (0.21 mm.)] except where direct discharge to a stream, lake, or wetland will occur, then the EOS
should be no larger than Standard Sieve No. 100.
ESCSO
Construction Handbook 5 - 63 March, 1993
Additional Information — snt Fence
To reduce the chance of clogging, it is preferable to specify a fabric with openings as large as allowed by the criteria. No
fabric should be specified with an EOS smaller than U.S. Standard Sieve No. 100 [0.0059 in. (0.15 mm.)]. If 85 percent
or more of a soil, by weight, passes through the openings in a No. 200 sieve [0.0029 in. (0.074 mm.)], filter fabric should
not be used. Most of the particles in such a soil would not be retained if the EOS was loo large, and they would clog the
fabric quickly if the EOS was small enough to capture the soil.
The fence should be supported by a wire mesh if the fabric selected does not have sufficient strength and bursting
strength characteristics for the planned application (as recommended by the fabric manufacturer). Filter fabric material
should contain ultraviolet ray inhibitors and stabilizers to provide a minimum of six months of expected usable construc-
tion life at a temperature range of 0' F. to 120" F.
Installation Guidelines:
Filter fences are to be constructed on a level contour. Sufficient area should exist behind the fence for ponding to occur
without flooding or overtopping the fence.
• Posts should be spaced a maximum of 6 feet apart and driven securely into the ground a minimum of 30 inches.
• A trench should be excavated approximately 8 inches wide and 12 inches deep along the line of posts and upslope
from the barrier.
When standard strength filter fabric is used, a .wire mesh support fence should be fiastened securely to the upslope
side of the posts using heavy-duty wire staples at least 1 inch long, tie wires or hog rings. The wire should extend
into the trench a minimum of 4 inches.
• The standard strength filter fabric should be stapled or wired to the fence, and 40 inches of the fabric should extend
into the trench. When extra-strength filter fabric and closer post spacing are used, the wire mesh support fence may
be eliminated and the filter fabric stapled or wired directly to the posts.
• Avoid the use of joints. The filter fabric should be purchased in a continuous roll, then cut to the length of the
barrier. When joints are necessary, filter cloth should be spliced together only at a support post, with a minimum 6
inch overlap, and both ends securely fastened to the post.
• The trench should be backfilled with compacted native material.
Requirements
Maintenance:
Inspect monthly during dry periods and immediately after each rainfall. Repair as necessary. Sediment must be removed
when it reaches approximately one third the height of the fence, especially if heavy rains are expected.
Filter fences should not be removed until the upslope area has been permanently stabilized.
.imitations
Filter fences will create a temporary sedimentation pond on the upstream side of the fence and may cause temporary
flooding. Fences not constructed on a level contour will be overtopped by concentrated flow resulting in failure of
the filter fence.
Filter fences are not practical where large flows of water are involved, hence the need to restrict their use to drainage
areas of one acre or less, and flow rates of less than 0.5 cfs.
Problems may arise from incorrect selection of pore size and/or improper installation.
Do not allow water depth to exceed 1.5 ft. at any point
Improperly installed fences are subject to failure from undercutting, overlapping, or collapsing.
ESCSO
Construction Handbook 5 - 64 March, 1993
Additional Information — snt Fence
REFERENCES
Best Management Practices and Erosion Control Manual for Construction Sites, Flood Control District of Maricopa
County, Arizona, Septemberl992.
Environmental Action Manual, City of Austin, Texas, 1989.
Manual of Standards of Erosion and Sediment Control Measures, Association of Bay Area Governments, Jun 1981.
Proposed Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters, Work
Group Working Paper, USEPA, April, 1992.
Sedimentation and Erosion Control Practices, An Introductory of Current Practices (Draft), USEPA, 1990.
Stormwater Management Manual for The Puget Sound Basin, Washington State Department of Ecology, Public Review
Draft, 1991.
Water Quality Management Plan for the Lake Tahoe Region, Volume n. Handbook of Management Practices, Tahoe
Regional Planning Agency - November 1988.
ESC50
Construction Handbook 5 - 65 March 1993
Additional Information — silt Fence
..—2~ X 4" WOOD POST. STANDARD OR BETTER OR
EQUAL ALTERNATE: STEEL FENCE POST
,—FILTER FABRIC MATERIAL SO" WIDE ROLLS.
USE STAPLES OR WIRE RINGS TO ATTATCH
FABRIC TO WIRE
— 2~ X 2" 14 GA WIRE
FABRIC OR EQUIV.n
BURY BOTTOM OF FILTER MATERIAL
IN 8- X 12- TRENCH
FILTER FABRIC MATERIA
2" X 2" 14 GA WIRE
FABRIC OR EQUIV.
FOLD S. SET FILTER
FABRIC INTO SOIL
BACKFILL AND COMPACT THE EXCAVATED
SOIL IN TRENCH AND ON BOTH SIDES
OF FILTER FENCE FABRIC
2* X 4" WOOD POST
ALT: STEEL FENCE POSTS
SILT FENCE
Construction Handbook 5-66 March, 1993
BMP: STABILIZED CONSTRUCTION ENTRANCE
Contain Wasta
PmtKt SJcpts/Chann+Ls
Control Inttmal Eroskfi
GENERAL DESCRIPTION
The construction entrance practice is a stabilized pad of aggregate underlain with filter
cloth located a: any point where traffic will be entering or leaving a construction site to or
from a public right-of-way, street, alley, sidewalk or parking area. Stabalizing the
construction entrance significantly reduces the amount of sediment (dust, mud) tracked
off-site, especially if a washrack incorporated for removing caked on sediment.
SUITABLE APPLICATIONS
• All points of construction ingress and egress,
• Unpaved areas where sediment tracking occurs from site onto paved roads.
INSTALLATION/APPLICATION CRITERIA
• Construct on level ground where possible.
• Stones should be 1-3 inches.
Minimum depth of stones should be 6 inches or as recommended by soils engineer.
• Length Should be 50-fOOt minimum, and 30-fOOC minimum width.
• Provide ample turning radii as part of entrance.
REQUIREMENTS
• Maintenance
Inspect monthly and after each rainfall.
Replace gravel material when surface voids are visible.
Remove all sediment deposited on paved roadways within 24 hours.
Remove gravel and filter fabric at completion of construction
Cose Average annual cost for installation and maintenance (Source: EPA, 1992)
- Without Wash Rock: S1500 each.
- With Wash Rock: S22CO each.
LIMITATIONS
Requires periodic top dressing with additional stones.
• Should be used in conjunction with street sweeping on adjacent public right-of-way.
Targeted Pollutants
Q Sediment
Q Nutrients
Q Toxic Material*
Q Oil & Grease
O Floatable Materials
O Other Construction
Wasta
Significant Impact
O Pnb*>l* Low orUnknown Impact
Implementation
Requirements
Q Capital Coats
O O&UCotts
O Maintenance
O Training
O Suitability for
Slopes >5%
High O Low
ESC24
Best'
Management
Practices''
Construction Handbook 5 -37 March, 1993
Additional Information — Stabilized Construction Entrance
A stabilized construction entrance is a pad of aggregate underlain with filter cloth located at any point where traffic will
be entering or leaving a construction site to or from a public right-of-way, street, alley, sidewalk or parking area. The
purpose of a stabilized construction entrance is to reduce or eliminate the tracking of sediment onto pubb'c rigfats-of-way
or streets. Reducing trackout of sediments and other pollutants onto paved roads helps prevent deposition of sediments
into local storm drains and production of airborne dust
Where traffic will be entering or leaving, a stabilized construction entrance should be used at all points of construction
ingress and egress. NPDES permits require that appropriate measures be implemented to prevent trackout of sediments
onto paved roadways, which is a significant source of sediments derived from mud and dirt carryout from the unpaved
roads and construction sites.
Stabilized construction entrances are moderately effective in removing sediment from equipment leaving a construction
site. The entrance should be build on the level ground. Advantages of the Stabilized Construction Entrance is that it does
remove seme sediment from equipment and serves to channel construction traffic in and out of the site at specified
locations. Efficiency is greatly increased when a washing rack is included as part of a stabilized construction entrance.
The aggregate for a stabilized construction entrance aprons should be 1 to 3 inches in size, washed, well-graded gravel or
crushed rock. Minimum apron dimensions of 30 ft. x 50 ft. and 6 inches deep is adequate for two-way ingress/egress
traffic.
The entrance must be properly graded to prevent runoff from leaving the construction site.
When wash areas are provided, washing is done on a reinforced concrete pad (if significant washing is necessary) or in
an area stabilized with crushed stone which drains into a properly constructed sediment trap or basin (ESC 55 and 56).
Sediment barriers are provided to prevent sediments from entering into the stormwater sewer system, ditch, or waterway.
T .i
• Construct on level ground.
• Stabilized construction entrances are rather expensive to construct and when a wash rack is included, a sediment trap
of some land must also be provided to collect wash water runoff.
• Requires periodic top dressing with additional stones.
• Should be used in conjunction with street sweeping on adjacent public right-of-way.
REFERENCES
Best Management Practices and Erosion Control Manual for Construction Sites, Flood Control District of Maricopa
County, Arizona, September 1992.
Manual of Standards of Erosion and Sediment Control Measures, Association of Bay Area Governments,
June 1981.
Proposed Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters, Work
Group Working Paper, USEPA, April, 1992.
Stormwater Management Water for the Puget Sound Basin, Washington State Department of Ecology, The Technical
Manual - February 1992, Publication # 91-75.
Virginia Erosion and Sedimentation Control Handbook, Virginia Department of Conservation and Recreation, Division
of Soil and Water Conservation, 1991.
ESC24Water Quality Management Plan for the Lake Tanoe Region, Volume n, Handbook of Management i-ww«.-r
Practices, Tahoe Regional Planning Agency • November 1988.
Construction Handbook 5 - 38 March, 1993
Additional Information — Stabilized Construction Entrance
DITCH TO CARRY
WASH WATER TO
SEDIMENT BASIN OR
TRAP
WASH RACK
VEHCLE LENGTH
-DRAIN SPACE
•REINFORCED CONCRETE
•CHANNEL/DITCH BOTTOM
WASH RACK (SCHEMATIC)
METAL BAR
FILTER FABRIC
I' TO 3* COARSE
AGGREGATE
STABIJ7ED CONSTRUCTION ENTRANCE
ESC24
Construction Handbook 5-39 March, 1993
APPENDIX D
RECORD OF CHANGES
RECORD OF CHANGES
Change No.Date Page No.Description of Change Signature
APPENDIX E
INSPECTION CHECKLIST
Construction General Permit
Inspection Checklist
[ ] Regular Inspection [ J Rainfall Event Inspection (Before)
[ ] Rainfall Event Inspection (After) Rainfall Inches
Inspected By:_
Project:
Date:
YES NO
DOES
NOT
APPLY
Are the BMPs called for on the SWPPP installed in the proper location and
according to the specifications for the SWPPP?
Are all operational storm drain inlets protected from sediment inflow?
Do any structural practices require repair or clean-out to maintain adequate
function? If yes, indicate which ones: '• •
Are construction on-site traffic routes, parking, and storage of equipment and
supplies restricted to areas specifically designated for those uses?
Are locations of temporary soil stock piles or construction materials in approved
vrrif')areas?
Do any seeded or landscaped areas require maintenance, irrigation, fertilization,
seeding, or mulchino?seeding, or mulching?
Is there any evidence that sediment is leaving the site?
Is there any evidence of erosion or cut or fill slopes?
Is there any evidence of sediment, debris, or mud on public roads at
intersections with site access roads?
Does the SWPPP require revisions? If yes, expiain:
Construction General Permit
Inspection Checklist
[ ] Regular Inspection [ ] Rainfall Event Inspection (Before)
[ ] Rainfall Event Inspection (After) Rainfall Inches
Inspected By:_
Project:
Date:
DOES
NOT
APPLY
LJJ.
—
Are the BMPs called for on the SWPPP installed in the proper location and
according to the specifications for the SWPPP?
•Are all operational storm drain inlets protected from sediment inflow?
Do any structural practices require repair or clean-out to maintain adequate
function? If yes, indicate which ones:
Are construction on-site traffic routes, parking, and storage of equipment and
supplies restricted to areas specifically designated for those uses?
Are locations of temporary soil stock piles or construction materials in approved
areas? rr
Do any seeded or landscaped areas require maintenance, irrigation, fertilization
seeding, or mulching?
Is there any evidence that sediment is leaving the site?
Is there any evidence of erosion or cut or fill slopes?
Is there any evidence of sediment, debris, or mud on public roads at
intersections with site access roads?
Does the SWPPP require revisions? If yes, explain:
Construction General Permit
Inspection Checklist
[ ] Regular Inspection
Inspected By:_
Project:
[ ] Rainfall Event Inspection (Before)
[ ] Rainfall Event Inspection (After) Rainfall Inches
Date:
YES NO
DOES
NOT
APPLY
Are the BMPs called for on the SWPPP installed in the proper location and
according to the specifications for the SWPPP?
Are all operational storm drain inlets protected from sediment inflow?
Do any structural practices require repair or clean-out to maintain adequate
function? If yes, indicate which ones: '••
Are construction on-site traffic routes, parking, and storage of equipment and
supplies restricted to areas specifically designated for those uses?
Are locations of temporary soil stock piles or construction materials in approvedar»»^c9 r"areas?
Do any seeded or landscaped areas require maintenance, irrigation, fertilization,seeding, or mulching?
Is there any evidence that sediment is leaving the site?
Is there any evidence of erosion or cut or fill slopes?
Is there any evidence of sediment, debris, or mud on public roads at
intersections with site access roads?
Docs the SWPPP require revisions? If yes, explain:
[ ] Regular Inspection
Inspected By:
Project:.
YES NO
Construction General Permit
.> Inspection Checklist
[ ] Rainfall Event Inspection (Before)
I J R^nfall Event Inspection (After) Rainfall Inches
Date:
DOES
NOT
APPLY
Are the BMPs called for on the SWPPP installed in the proper location and
according to the specifications for the SWPPP?
Are all operational storm drain inlets protected from sediment inflow?
or to
and^ v-.j-j.i6 uaiuc routes, paricing, and storage of equ
lies restricted to areas specifically designated for those uses?
Are locations of temporary soil stock piles or construction materials in approvedareas?
Cation,
Is there any evidence that sediment is leaving the site?
Is there any evidence of erosion or cut or fill slopes?
Is there any evidence of sediment, debris, or mud on public roads at
intersections with site access roads?
Does the SWPPP require revisions? ff