HomeMy WebLinkAboutSDP 2021-0016; CARLSBAD OAKS NORTH, LOT 3; PRELIMINARY STORM WATER QUALITY MANAGEMENT PLAN; 2021-12-06•,
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CITY OF CARLSBAD
PRIORITY DEVELOPMENT PROJECT (PDP) PRELIMINARY
STORM WATER QUALITY MANAGEMENT PLAN, r f f~
(SWQMP) FOR
Lot 3, Whiptail Loop FEB O ii 2022
SOP 2021-0016
Cl fY 0;-CARLSBAD
NGINEER OF WORK: Danny Abada, P.E.
PREPARED FOR:
Owner/Subdivider: Tech Contractors c/o Dean Smith
3575 Kenyon St., Suite 200, San Diego, CA 92110
619-223-1663
dean@techbilt.com
PREPARED BY:
SPEAR & ASSOCIATES, INC.
CIVIL ENGINEERING & LAND SURVEYING
475 Production Street
San Marcos, CA 92078
Telephone: (760) 736-2040
DATE:
12/6/21
RECORD COPY
Initial
TABLE OF CONTENTS
Certification Page
Project Vicinity Map
FORM E-34 Storm Water Standard Questionnaire
Site Information
FORM E-3(;> Standard Project Requirement Checklist
Summary of PDP Structural BMPs
Attachment 1: Backup for PDP Pollutant Control BMPs
Attachment 1 a: OMA Exhibit
Attachment 1 b: Tabular Summary of DMAs and Design Capture Volume Calculations
Attachment 1 c: Harvest and Use Feasibility Screening (when applicable)
Attachment 1d: Categorization of Infiltration Feasibility Condition (when applicable)
Attachment 1 e: Pollutant Control BMP Design Worksheets I Calculations
Attachment 2: Backup for PDP Hydromodification Control Measures
Attachment 2a: Hydromodification Management Exhibit
Attachment 2b: Management of Critical Coarse Sediment Yield Areas
Attachment 2c: Geomorphic Assessment of Receiving Channels
Attachment 2d: Flow Control Facility Design
Attachment 3: Structural BMP Maintenance Thresholds and Actions
Attachment 4: Single Sheet BMP (SSBMP) Exhibit
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CERTIFICATION PAGE
Project Name: Lot 3, Whiptail Loop
I hereby declare that I am the Engineer in Responsible Charge of design of storm water BMPs
for this project, and that I have exercised responsible charge over the design of the project as
defined in Section 6703 of the Business and Professions Code, and that the design is consistent
with the requirements of the BMP Design Manual, which is based on the requirements of
SDRWQCB Order No. R9-2013-0001 (MS4 Permit) or the current Order.
I have read and understand that the City Engineer has adopted minimum requirements for
managing urban runoff, including storm water, from land development activities, as described in
the BMP Design Manual. I certify that this SWQMP has been completed to the best of my ability
and accurately reflects the project being proposed and the applicable source control and site
design BMPs proposed to minimize the potentially negative impacts of this project's land
development activities on water quality. I understand and acknowledge that the plan check
review of this SWQMP by the City Engineer is confined to a review and does not relieve me, as
the Engineer in Responsible Charge of design of storm water BMPs for this project, of my
responsibilities for project design.
Danny Aba?a, P.E. RCE 45381 Expiration 9/30/22
V
Spear & Associates Inc.
Company
12/6/21
Date
PROJECT VICINITY MAP
LOCATION MAP
(No scale)
[Insert City's Storm Water Standard Questionnaire (Form E-34) here]
~ City of
Carlsbad
STORM WATER STANDARDS
QUESTIONNAIRE
Development Services
Land Development Engineering
1635 Faraday Avenue
(760) 602-2750
www.carlsbadca.gov
E-34
I INSTRUCTIONS:
To address post-development pollutants that may be generated from development projects, the city requires that new
development and significant redevelopment priority projects incorporate Permanent Storm Water Best Management
Practices (BMPs) into the project design per Carlsbad BMP Design Manual (BMP Manual). To view the BMP Manual,
refer to the Engineering Standards (Volume 5).
This questionnaire must be completed by the applicant in advance of submitting for a development application
(subdivision, discretionary permits and/or construction permits). The results of the questionnaire determine the level of
storm water standards that must be applied to a proposed development or redevelopment project. Depending on the
outcome, your project will either be subject to 'STANDARD PROJECT' requirements or be subject to 'PRIORITY
DEVELOPMENT PROJECT' (PDP) requirements.
Your responses to the questionnaire represent an initial assessment of the proposed project conditions and impacts. City
staff has responsibility for making the fina l assessment after submission of the development application. If staff
determines that the questionnaire was incorrectly filled out and is subject to more stringent storm water standards than
initially assessed by you , this will result in the return of the development application as incomplete. In this case, please
make the changes to the questionnaire and resubmit to the city.
If you are unsure about the meaning of a question or need help in determining how to respond to one or more of the
questions, please seek assistance from Land Development Engineering staff.
A completed and signed questionnaire must be submitted with each development project application. Only one
completed and signed questionnaire is requ ired when multiple development applications for the same project are
submitted concurrently.
PROJECT INFORMATION
PROJECT NAME: Lot 3, Whiptail Loop PROJECT ID:
ADDRESS: Lot 3, Whiptail Loop, Carlsbad, CA 92008 APN: 209-120-02
The project is (check one):~ew Development D Redevelopment
The total proposed disturbed area is: 225775 ft2 ( 5.18 ) acres
The total proposed newly created and/or replaced impervious area is: 151060 ft2 ( 3.47 ) acres
If your project is covered by an approved SWQMP as part of a larger development project, provide the project ID and the
SWQMP # of the larger development project:
Project ID SWQMP#:
Then , go to Step 1 and follow the instructions. When completed , sign the form at the end and submit this with your
application to the city.
E-34 Page 1 of 4 REV 02/16
STEP 1
TO BE COMPLETED FOR ALL PROJECTS
To determine if your project is a "development project", please answer the following question:
YES NO
Is your project LIMITED TO routine maintenance activity and/or repair/improvements to an existing building □ ~ or structure that do not alter the size (See Section 1.3 of the BMP Design Manual for guidance)?
If you answered "yes" to the above question, provide justification below then go to Step 5, mark the third box stating "my
project is not a 'development project' and not subject to the requirements of the BMP manual" and complete applicant
information.
Justification/discussion: (e.g. the project includes only interior remodels within an existing building):
If you answered "no" to the above question, the project is a 'development project', go to Step 2.
STEP2
TO BE COMPLETED FOR ALL DEVELOPMENT PROJECTS
To determine if your project is exempt from PDP requirements pursuant to MS4 Permit Provision E.3.b.(3), please answer
the following questions:
Is your project LIMITED to one or more of the following : 1J YES NO
1. Constructing new or retrofitting paved sidewalks, bicycle lanes or trails that meet the following criteria:
a) Designed and constructed to direct storm water runoff to adjacent vegetated areas, or other non-~ erodible permeable areas; □ b) Designed and constructed to be hydraulically disconnected from paved streets or roads;
c) Designed and constructed with permeable pavements or surfaces in accordance with USEPA
Green Streets guidance?
2. Retrofitting or redeveloping existing paved alleys, streets, or roads that are designed and constructed in □ rL" accordance with the USEPA Green Streets guidance?
3. Ground Mounted Solar Array that meets the criteria provided in section 1.4.2 of the BMP manual? □ <
If you answered "yes" to one or more of the above questions, provide discussion/justification below, then go to Step 5, mark
the second box stating "my project is EXEMPT from PDP ... " and complete applicant information.
Discussion to justify exemption ( e.g. the project redeveloping existing road designed and constructed in accordance with
the USEPA Green Street guidance):
If you answered "no" to the above questions, your project is not exempt from PDP, go to Step 3. 0
E-34 Page 2 of 4 REV 04/1 7
STEP3
C TO BE COMPLETED FOR ALL NEW OR REDEVELOPMENT PROJECTS
To determine if your project is a PDP, please answer the following questions (MS4 Permit Provision E.3.b.(1 )):
YES NO
1. Is your project a new development that creates 10,000 square feet or more of impervious surfaces
collectively over the entire project site? This includes commercial, industrial, residential, mixed-use, .v □ and public development projects on public or private land.
2. Is your project a redevelopment project creating and/or replacing 5,000 square feet or more of
impervious surface collectively over the entire project site on an existing site of 10,000 square feet or □ ~ more of impervious surface? This includes commercial, industrial, residential, mixed-use, and public
development projects on public or private land.
3. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more
of impervious surface collectively over the entire project site and supports a restaurant? A restaurant is ~ a facility that sells prepared foods and drinks for consumption, including stationary lunch counters and □ refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial
Classification (SIC) code 5812).
4. Is your project a new or redevelopment project that creates 5,000 square feet or more of impervious ~ surface collectively over the entire project site and supports a hillside development project? A hillside □ development project includes development on any natural slope that is twenty-five percent or greater.
5. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more ~ of impervious surface collectively over the entire project site and supports a parking lot? A parking lot is □ a land area or facility for the temporary parking or storage of motor vehicles used personally for
business or for commerce.
6. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more ~ of impervious street, road, highway, freeway or driveway surface collectively over the entire project □ site? A street, road, highway, freeway or driveway is any paved impervious surface used for the
transportation of automobiles, trucks, motorcvcles, and other vehicles.
C'· 7. Is your project a new or redevelopment project that creates and/or replaces 2,500 square feet or more
of impervious surface collectively over the entire site, and discharges directly to an Environmentally ~ Sensitive Area (ESA)? "Discharging Directly to" includes flow that is conveyed overtand a distance of □ 200 feet or less from the project to the ESA, or conveyed in a pipe or open channel any distance as an
isolated flow from the project to the ESA (i.e. not commingled with flows from adjacent lands).*
8. Is your project a new development or redevelopment project that creates and/or replaces 5,000 square ~ feet or more of impervious surface that supports an automotive repair shop? An automotive repair □ shop is a facility that is categorized in any one of the following Standard Industrial Classification (SIC)
codes: 5013, 5014, 5541, 7532-7534, or 7536-7539.
9. Is your project a new development or redevelopment project that creates and/or replaces 5,000 square ~ feet or more of impervious area that supports a retail gasoline outlet (RGO)? This category includes □ RGO's that meet the following criteria: (a) 5,000 square feet or more or (b) a project Average Daily
Traffic (ADT) of 100 or more vehicles per day.
10. Is your project a new or redevelopment project that results in the disturbance of one or more acres of land r< □ and are expected to generate pollutants post construction?
11 . Is your project located within 200 feet of the Pacific Ocean and (1) creates 2,500 square feet or more of
impervious surface or (2) increases impervious surface on the property by more than 10%? (CMC □ ~
21 .203.040)
If you answered "yes" to one or more of the above questions, your project is a PDP . If your project is a redevelopment
project, go to step 4. If your project is a new project, go to step 5, check the first box stating "My project is a PDP ... "
and complete applicant information.
If you answered "no" to all of the above questions, your project is a 'STANDARD PROJECT.' Go to step 5, check the
second box stating "My project is a 'STANDARD PROJECT' ... " and complete aoolicant information.
E-34 Page 3 of 4 REV 04/17
STEP4
TO BE COMPLETED FOR REDEVELOPMENT PROJECTS THAT ARE PRIORITY DEVELOPMENT PROJECTS (PDP)
ONLY
Complete the questions below regarding your redevelopment project (MS4 Permit Provision E.3.b.(2)):
YES NO
Does the redevelopment project result in the creation or replacement of impervious surface in an amount
of less than 50% of the surface area of the previously existing development? Complete the percent
impervious calculation below:
Existing impervious area (A) = sq. ft. □ □
Total proposed newly created or replaced impervious area (B) = sq . ft.
Percent impervious area created or replaced (B/A)*100 = %
If you answered "yes", the structural BMPs required for PDP apply only to the creation or replacement of impervious
surface and not the entire development. Go to step 5, check the first box stating "My project is a PDP ... " and complete
applicant information.
If you answered "no," the structural BM P's required for PDP apply to the entire development. Go to step 5, check the
check the first box stating "My project is a PDP ... " and complete applicant information.
STEPS
CHECK THE APPROPRIATE BOX AND COMPLETE APPLICANT INFORMATION
My project is a PDP and must comply with PDP stormwater requirements of the BMP Manual. I understand I must
prepare a Storm Water Quality Management Plan (SWQMP) for submittal at time of application.
0 My project is a 'STANDARD PROJECT' OR EXEMPT from PDP and must only comply with 'STANDARD PROJECT'
stormwater requirements of the BMP Manual. As part of these requirements, I will submit a "Standard Project
Requirement Checklist Form E-36' and incorporate low impact development strategies throughout my project.
Note: For projects that are close to meeting the PDP threshold, staff may require detailed impervious area calculations
and exhibits to verify if 'STANDARD PROJECT' stormwater requirements apply.
D My Project is NOT a 'development project' and is not subject to the requirements of the BMP Manual.
Applicant Information and Signature Box
Applicant Name: Applicant Title:
Applicant Signature: Date:
• Environmentally Sens1t1ve Areas include but are not limited to all Clean Water Act Section 303(d) impaired water bodies; areas designated as Areas of Special
Biological Significance by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); water bodies
designated with the RARE beneficial use by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and
amendments); areas designated as preserves or their equivalent under the Multi Species Conservation Program within the Cities and County of San Diego; Habitat
Management Plan; and any other equivalent environmentally sensitive areas which have been identified by the City.
Th . B ~ C"t U O I IS ox or IW se n1v
YES NO
City Concurrence: □ □
By:
Date:
Project ID:
E-34 Page 4 of 4 REV 04/17
(_)
SITE INFORMATION CHECKLIST
Project Summary Information
Project Name Lot 3, Whiptail Loop
Project ID SOP 2021-0016
Project Address Whiptail Loop, Carlsbad, CA 92008
.
Assessor's Parcel Number(s) (APN(s)) 209-120-02
Project Watershed (Hydrologic Unit) Carlsbad 904
Parcel Area
5.18 Acres ( 225,775 Sauare Feet)
Existing Impervious Area
0.34 Acres ( 14,700 Square Feet) (subset of Parcel Area)
Area to be disturbed by the project
5.18 Acres Square Feet) (Project Area) (225,775
Project Proposed Impervious Area
3.47 Acres (subset of Project Area) (151,060 Square Feet)
Project Proposed Pervious Area
1.72 Acres Square Feet) (subset of Project Area) (74,715
Note: Proposed Impervious Area+ Proposed Pervious Area= Area to be Disturbed by the
Project.
This may be less than the Parcel Area.
Description of Existing Site Condition and Drainage Patterns
Current Status of the Site (select all that apply):
Existing development
X Previously graded but not built out
□ Agricultural or other non-impervious use
□ Vacant, undeveloped/natural
Description/ Additional Information: The site includes an existing single family residence.
Existing Land Cover Includes (select all that apply):
X Vegetative Cover
□ Non-Vegetated Pervious Areas
□ Impervious Areas
Description/ Additional Information:
The site is mostly bare and covered with patches of native grass.
Underlying Soil belongs to Hydrologic Soil Group (select all that apply):
D NRCS Type A
NRCS Type B
D NRCS Type C
X NRCS Type D
Approximate Depth to Groundwater (GW):
D GW Depth < 5 feet
□ 5 feet < GW Depth < 1 0 feet
X 1 0 feet < GW Depth < 20 feet
GW Depth > 20 feet
Existing Natural Hydrologic Features (select all that apply):
□ Watercourses
□ Seeps
□ Springs
□ Wetlands
X None
Description/ Additional Information:
Description of Existing Site Topography and Drainage [How is storm water runoff conveyed from
the site? At a minimum, this description should answer (1) whether existing drainage
conveyance is natural or urban; (2) describe existing constructed storm water conveyance
systems, if applicable; and (3) is runoff from offsite conveyed through the site? if so , describe]:
The existing drainage is urban. The site drains from the northwest to the southeast corner of the lot and is
intercepted by an existing catch basin and a 60" RCP on Whiptail loop per drawing # 415-9. It is then
directed to an existing offsite detention basin, previously designed to attenuate future development
increases in flow rate. The Basin is located west of the project site near the intersection on Faraday
Avenue and El Fuerte Street. (Refer to "Hydrology Study for Carlsbad Oaks North Phase 2, CT 97-13-02"
prepared by O'Day Consultants Inc. Dated 11/1/2005 and Revised 7/31/2006).The drainage then
continues approximately 0.43 miles north to Agua Hedionda Creek, then 5.2 miles west to the Pacific
Ocean.
conveyed trough the site No offsite runoff
Description of Proposed Site Development and Drainage Patterns
Project Description / Proposed Land Use and/or Activities:
Proposed land use is for a commercial development with 3 buildings, a parking lot, underground
utilities, covered trash enclosures, landscaping, and biofiltration for stormwater treatment.
LisUdescribe proposed impervious features of the project (e.g ., buildings, roadways, parking
lots, courtyards, athletic courts, other impervious features):
Building rooftops, driveways and hardscape.
LisUdescribe proposed pervious features of the project (e.g., landscape areas):
Landscaping and biofiltration.
Does the project include grading and changes to site topography?
XYes
D No
Description/ Additional Information:
The development will require minor grading onsite; however, slope patterns will be significantly maintained as
in pre-development.
Does the project include changes to site drainage (e.g ., installation of new storm water
conveyance systems)?
XYes
No
Description/ Additional Information:
Proposed drainage will maintain existing site characteristics and will include biofiltration for stormwater
treatment.
The stormwater will be directed to biofiltration basins fitted with overflow risers. Their flow will be directed to
new stromdrains onsite draining into a 60" RCP on Whiptail Loop per drawing 415-9. Peak flows will be
attenuated to pre-development rates by an existing offsite detention basin located west of the project site near
the intersection on Faraday Avenue and El Fuerte Street. (Refer to "Hydrology Study for Carlsbad Oaks North
Phase 2, CT 97-13-02" prepared by O'Day Consultants Inc. Dated 11/1/2005 and Revised 7 /31 /2006).The
drainage then continues to Encinitas Creek and the Pacific Ocean.
Identify whether any of the following features, activities, and/or pollutant source areas will be
present (select all that apply):
X On-site storm drain inlets
□ Interior floor drains and elevator shaft sump pumps
□ Interior parking garages
□ Need for future indoor & structural pest control
X Landscape/Outdoor Pesticide Use
□ Pools, spas, ponds, decorative fountains, and other water features
□Foodservice
X Refuse areas
□ Industrial processes
□ Outdoor storage of equipment or materials
□ Vehicle and Equipment Cleaning
□ Vehicle/Equipment Repair and Maintenance
□ Fuel Dispensing Areas
□ Loading Docks
X Fire Sprinkler Test Water
□ Miscellaneous Drain or Wash Water
X Plazas, sidewalks, and parking lots
Identification of Receiving Water Pollutants of Concern
Describe path of storm water from the project site to the Pacific Ocean (or bay, lagoon, lake or
reservoir, as applicable):
Site runoff will be directed to a 60" RCP on Whiptail Loop per drawing 415-9. Peak flows will be
attenuated to pre-development rates by an existing offsite detention basin located west of the project site
near the intersection on Faraday Avenue and El Fuerte Street. (Refer to Hydrology Study for Carlsbad
O aks North Phase 2, CT 97-13-02 prepared by O Day Consultants Inc. D ated 11 /1/2005 and Revised
7 /31/2006).The drainage then continues to Encinitas Creek and the Pacific Ocean.
List any 303(d) impaired water bodies within the path of storm water from the project site to the
Pacific Ocean (or bay, lagoon, lake or reservoir, as applicable), identify the
pollutant(s)/stressor(s) causing impairment, and identify any TMDLs for the impaired water
bodies:
303(d) Impaired Water Body Pollutant(s)/Stressor(s) TMDLs
Agua Hedionda Creek Benthic Community effects, Bifenthrin,
Chlorpyrifos, Cypermethrin, Tndicator,
Bacteria, Malathion, Manganese, Nitrogen,
Selenium, Total Dissolved Solids, Toxicity.
Agua Hedionda Lagoon Toxicity
Identification of Project Site Pollutants
Identify pollutants anticipated from the project site based on all proposed use(s) of the site (see
BMP Design Manual Appendix B.6):
Also a Receiving
Not Applicable to Anticipated from the Water Pollutant of
Pollutant the Project Site Project Site Concern
X
Sediment
X
Nutrients
X X
Heavy Metals
X
Organic Compounds
X
Trash & Debris
Oxygen Demanding X
Substances
X
Oil & Grease
X
Bacteria & Viruses
X
Pesticides
Hydromodification Management Requirements
Do hydro modification management requirements apply (see Section 1.6 of the BMP Design
Manual)?
X Yes, hydromodification management flow control structural BMPs required.
No, the project will discharge runoff directly to existing underground storm drains discharging
directly to water storage reservoirs, lakes, enclosed embayments, or the Pacific Ocean.
□ No, the project will discharge runoff directly to conveyance channels whose bed and bank are
concrete-lined all the way from the point of discharge to water storage reservoirs, lakes,
enclosed embayments, or the Pacific Ocean.
□ No, the project will discharge runoff directly to an area identified as appropriate for an
exemption by the WMAA for the watershed in which the project resides.
Description/ Additional Information (to be provided if a 'No' answer has been selected above):
Critical Coarse Sediment Yield Areas*
*This Section only required if hydromodification manaaement reauirements aoolv
Based on the maps provided within the WMAA, do potential critical coarse sediment yield areas
exist within the project drainage boundaries?
□Yes
X No, No critical coarse sediment yield areas to be protected based on WMAA maps
If yes, have any of the optional analyses presented in Section 6.2 of the BMP Design Manual
been performed?
□ 6.2.1 Verification of Geomorphic Landscape Units (GLUs) Onsite
□ 6.2.2 Downstream Systems Sensitivity to Coarse Sediment
□ 6.2.3 Optional Additional Analysis of Potential Critical Coarse Sediment Yield Areas Onsite
□ No optional analyses performed, the project will avoid critical coarse sediment yield areas
identified based on WMAA maps
If optional analyses were performed, what is the final result?
□ No critical coarse sediment yield areas to be protected based on verification of GLUs onsite
□ Critical coarse sediment yield areas exist but additional analysis has determined that
protection is not required. Documentation attached in Attachment 8 of the SWQMP.
□ Critical coarse sediment yield areas exist and require protection. The project will implement
management measures described in Sections 6.2.4 and 6.2.5 as applicable, and the areas
are identified on the SWQMP Exhibit.
Discussion/ Additional Information:
Flow CCritontrol for Post-Project Runoff"
*This Section only required if hydromodification management requirements aooly
List and describe point(s) of compliance (POCs) for flow control for hydromodification
management (see Section 6.3.1 ). For each POC, provide a POC identification name or number
correlating to the project's HMP Exhibit and a receiving channel identification name or number
correlating to the project's HMP Exhibit.
POC 1 @ t he SE corner of the site.
Has a geomorphic assessment been performed for the receiving channel(s)?
X No, the low flow threshold is 0.1 Q2 ( default low flow threshold)
□ Yes, the result is the low flow threshold is 0.1 Q2
□ Yes, the result is the low flow threshold is 0.3Q2
□ Yes, the result is the low flow threshold is 0.5Q2
If a geomorphic assessment has been performed, provide title, date, and preparer:
Discussion/ Additional Information: (optional)
Other Site Requirements and Constraints
When applicable, list other site requirements or constraints that will influence storm water
management design, such as zoning requirements including setbacks and open space, or City
codes governing minimum street width, sidewalk construction, allowable pavement types, and
drainage requirements.
Infiltration based treatment BMPs are not feasible, according to Worksheet C.4-1 "Categorization of Infiltration
Condition" prepared by the geotechnical consultant.
Optional Additional Information or Continuation of Previous Sections As Needed
This space provided for additional information or continuation of information from previous
sections as needed.
[Insert City's Standard Project Requirement Checklist Form E-36 (here)]
C cityof
Carlsbad
Project Name: Lot 3, Whiptail Loop
Project ID:
DWG No. or Building Permit No.:
ST AND ARD PROJECT
REQUIREMENT
CHECKLIST
E-36
Project Information
Source Control BMPs
Development Services
Land Development Engineering
1635 Faraday Avenue
(760) 602-2750
www.carlsbadca.gov
All development projects must implement source control BMPs SC-1 through SC-6 where applicable and feasible. See
Chapter 4 and Appendix E.1 of the BMP Design Manual (Volume 5 of City Engineering Standards) for information to
implement source control BMPs shown in this checklist.
Answer each category below pursuant to the following.
• "Yes" means the project will implement the source control BMP as described in Chapter 4 and/or Appendix E.1 of the
Model BMP Design Manual. Discussion/justification is not required.
• "No" means the BMP is applicable to the project but it is not feasible to implement. Discussion/justification must be
provided. Please add attachments if more space is needed.
• "N/A" means the BMP is not applicable at the project site because the project does not include the feature that is
addressed by the BMP (e.g., the project has no outdoor materials storage areas). Discussion/justification may be
provided.
Source Control Requirement Applied?
SC-1 Prevention of Illicit Discharges into the MS4 Iii Yes □ No □ N/A
Discussion/justification if SC-1 not implemented:
SC-2 Storm Drain Stenciling or Signage Iii Yes □ No □ N/A
Discussion/justification if SC-2 not implemented:
SC-3 Protect Outdoor Materials Storage Areas from Rainfall, Run-On, Runoff, and Wind □ Yes D No Iii N/A Dispersal
Discussion/justification if SC-3 not implemented :
none proposed
E-36 Page 1 of 4 Revised 09/16
Source Control Requirement (continued) Aoolied?
SC-4 Protect Materials Stored in Outdoor Work Areas from Rainfall, Run-On, Runoff, and □ Yes □ No Iii N/A Wind Dispersal
Discussion/justification if SC-4 not implemented:
none proposed
SC-5 Protect Trash Storage Areas from Rainfall, Run-On , Runoff, and Wind Dispersal Iii Yes □ No □ N/A
Discussion/justification if SC-5 not implemented:
SC-6 Additional BMPs based on Potential Sources of Runoff Pollutants must answer for each source listed below and
identify additional BMPs. (See Table in Aooendix E.1 of BMP Manual for Quidance).
□ On-site storm drain inlets Iii Yes □ No □ N/A
□ Interior floor drains and elevator shaft sump pumps □ Yes □ No Iii N/A
□ Interior parking garages □ Yes □ No Iii N/A
□ Need for future indoor & structural pest control □ Yes □ No Iii N/A
□ Landscape/Outdoor Pesticide Use Iii Yes □ No □ N/A
□ Pools, spas, ponds, decorative fountains, and other water features □ Yes □ No Iii N/A
□ Food service □ Yes □ No Iii N/A
□ Refuse areas Iii Yes □ No □ N/A
□ Industrial processes □ Yes □ No Iii N/A
□ Outdoor storage of equipment or materials □ Yes □ No Iii N/A
□ Vehicle and Equipment Cleaning □ Yes □ No Iii N/A
□ Vehicle/Equipment Repair and Maintenance □ Yes □ No Iii N/A
□ Fuel Dispensing Areas □ Yes □ No Iii N/A
□ Loading Docks □ Yes □ No Iii N/A
□ Fire Sprinkler Test Water Iii Yes □ No □ N/A
□ Miscellaneous Drain or Wash Water □ Yes □ No Iii N/A
□ Plazas, sidewalks, and parking lots Iii Yes □ No □ N/A
For "Yes" answers, identify the additional BMP per Appendix E.1. Provide justification for "No" answers.
(SEE E-1 SOURCE CONTROL BMP REQUIREMENTS AT THE END OF CHECKLIST E-36)
E-36 Page 2 of 4 Revised 09/16
Site Design BMPs
All development projects must implement site design BMPs SD-1 through SD-8 where applicable and feasible. See
Chapter 4 and Appendix E.2 thru E.6 of the BMP Design Manual (Volume 5 of City Engineering Standards) for information
to implement site design BMPs shown in this checklist.
Answer each category below pursuant to the following.
• "Yes" means the project will implement the site design BMPs as described in Chapter 4 and/or Appendix E.2 thru E.6 of
the Model BMP Design Manual. Discussion / justification is not required.
• "No" means the BMPs is applicable to the project but it is not feasible to implement. Discussion/justification must be
provided. Please add attachments if more space is needed.
• "N/A" means the BMPs is not applicable at the project site because the project does not include the feature that is
addressed by the BMPs (e.g., the project site has no existing natural areas to conserve). Discussion/justification may be
provided.
Site Design Requirement I Applied?
SD-1 Maintain Natural Drainage Pathways and Hydrologic Features I [i] Yes I □ No I □ N/A
Discussion/justification if SD-1 not implemented:
SD-2 Conserve Natural Areas, Soils, and Vegetation I □ Yes I □ No I [i] N/A
Discussion/justification if SD-2 not implemented:
none existing
SD-3 Minimize Impervious Area I [i] Yes I □ No I □ N/A
Discussion/justification if SD-3 not implemented:
SD-4 Minimize Soil Compaction I [i] Yes I □ No I □ N/A
Discussion/justification if SD-4 not implemented:
SD-5 Impervious Area Dispersion I [i] Yes I □ No I □ N/A
Discussion/justification if SD-5 not implemented:
E-36 Page 3 of 4 Revised 09/16
Site Design Requirement (continued) I Aoolied?
SD-6 Runoff Collection I Iii Yes I □ No I □ N/A
Discussion/justification if SD-6 not implemented:
SD-7 Landscaping with Native or Drought Tolerant Species I Iii Yes I □ No I □ N/A
Discussion/justification if SD-7 not implemented:
SD-8 Harvestinq and Usinq Precipitation I □ Yes I Iii No I □ NIA
Discussion/justification if SD-8 not implemented:
not feasible. Refer to Form 1-7
E-36 Page 4 of 4 Revised 09/16
Structural BMP Summary Information
[Copy this page as needed to provide information for each individual proposed
structural BMP]
Structural BMP ID No. Biofiltration Basin A
Drainage Area Map Sheet No. 1
Type of structural BMP:
□ Retention by harvest and use (HU-1)
□ Retention by infiltration basin (INF-1)
□ Retention by bioretention (INF-2)
□ Retention by permeable pavement (INF-3)
□ Partial retention by biofiltration with partial retention (PR-1)
X Biofiltration (BF-1)
□ Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or
biofiltration BMP (provide BMP type/description and indicate which onsite retention or
biofiltration BMP it serves in discussion section below)
□ Detention pond or vault for hydromodification management
□ Other (describe in discussion section below)
Purpose:
Pollutant control only
□ Hydromodification control only
X Combined pollutant control and hydromodification control
□ Pre-treatment/forebay for another structural BMP
□ Other (describe in discussion section below)
Discussion (as needed):
Structural BMP Summary Information
[Copy this page as needed to provide information for each individual proposed
structural BMP]
Structural BMP ID No. Biofiltration Basin B
Drainage Area Map Sheet No. 1
Type of structural BMP:
□ Retention by harvest and use (HU-1)
□ Retention by infiltration basin (I NF-1)
□ Retention by bioretention (INF-2)
□ Retention by permeable pavement (INF-3)
□ Partial retention by biofiltration with partial retention (PR-1)
X Biofiltration (BF-1)
□ Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or
biofiltration BMP (provide BMP type/description and indicate which onsite retention or
biofiltration BMP it serves in discussion section below)
□ Detention pond or vault for hydromodification management
□ Other (describe in discussion section below)
Purpose:
Pollutant control only
□ Hydromodification control only
X Combined pollutant control and hydromodification control
□ Pre-treatment/forebay for another structural BMP
□ Other (describe in discussion section below)
Discussion (as needed):
Appendix E: BMP Design Fact Sheets
E.1 Source Control BMP Requirements
Worksheet E.1-1: Source Control BMP Requirements
How to comply: Projects must comply with this requirement by implementing all source control BMPs listed in this section that are applicable and feasible for
their project. Applicability must be determined through consideration of the development project's features and anticipated pollutant sources. Appendix E.1
provides guidance for identifying source control BMPs applicable to a project. The Standard and PDP SWQMP templates include sections that must be used to
document compliance with source control BMP requirements.
How to use this worksheet:
1. Review Column 1 and identify which of these potential sources of storm water pollutants apply to your site. Check each box that applies .
2. Review Column 2 and incorporate all of the corresponding applicable BMPs in your project site plan.
3. Review Columns 3 and 4 and incorporate all of the corresponding applicable permanent controls and operational BMPs in a table in your project-
specific storm water management report. Describe your specific BMPs in an accompanying narrative, and explain any special conditions or situations
that required omitting BMPs or substituting alternatives.
E-3 February 26, 2016
1
Potential Sources of
Runoff Pollutants
~ A. Onsite storm drain
inlets
D Not Applicable
fil
2
Permanent Controls-Show on
Drawings
Locations of inlets.
3
Permanent Controls-List in Table
and Narrative
~ Mark all inlets with the words "No
Dumping! Flows to Bay" or similar.
See stencil template provided in
Appendix I-4
E-4
Appendix E: BMP Design Fact Sheets
4
Operational BMPs-Include in
Table and Narrative
Kl Maintain and periodically repaint
or replace inlet markings.
E3 Provide storm water pollution
prevention information to new
site owners, lessees, or operators.
:CJ See applicable operational BMPs
in Fact Sheet SC-44, "Drainage
System Maintenance," in the
CASQA Storm Water Quality
Handbooks at
www .casqa.org/resources /bmp-
handbooks /municipal-bmp-
handbook.
~ Include the following in lease
agreements: "Tenant shall not
allow anyone to discharge
anything to storm drains or to
store or deposit materials so as to
create a potential discharge to
storm drains."
February 26, 2016
If These Sources Will Be
on the Project Site ...
□
fi:l
□
Clil
1
Potential Sources of
Runoff Pollutants
B. Interior floor
drains and elevator
shaft sump pumps
Not Aeelicable
C. Interior parking
garages
Not Applicable
□ Dl. Need for future
indoor & structural
pest control
l:i:I Not Applicable
Appendix E: BMP Design Fact Sheets
. .. Then Your SWQMP must consider These Source Control BMPs
2
Permanent Controls-Show on
Drawings
3
Permanent Controls-List in Table
and Narrative
□ State that interior floor drains and
elevator shaft sump pumps will be
plumbed to sanitary sewer.
□ State that parking garage floor
drains will be plumbed to the
sanitary sewer.
□ Note building design features that
discourage entry of pests.
E-5
4
Operational BMPs-Include in
Table and Narrative
□ Inspect and maintain drains to
prevent blockages and overflow.
□ Inspect and maintain drains to
prevent blockages and overflow.
□ Provide Integrated Pest
Management information to
owners, lessees, and operators.
February 26, 2016
1
Potential Sources of
Runoff Pollutants
IXI D2. Landscape/
Outdoor Pesticide
Use
□ Not Applicable
2
Permanent Controls-Show on
Drawings
(Z1
0
Ill
Show locations of existing
trees or areas of shrubs and
ground cover to be
undisturbed and retained.
Show self-retaining landscape
areas, if any.
Show storm water treatment
facilities.
3
Permanent Controls-List in Table and
Narrative
State that final landscape plans will
accomplish all of the fo llowing.
lJ Preserve existrng drought tolerant
trees, shrubs, and ground cover to the
maximum extent possible.
~ Design landscaping to rrururruze
irrigation and runoff, to promote
surface infiltration where appropriate,
and to minimize the use of fertilizers
and pesticides that can contribute to
storm water pollution.
Cll Where landscaped areas are used to
retain or detain storm water, specify
plants that are tolerant of periodic
saturated soil conditions.
~ Consider using pest-resistant plants,
especially adjacent to hardscape.
ij To ensure successful establishment,
select plants appropriate to site soils,
slopes, climate, sun, wind, rain, land
use, air movement, ecological
consistency, and plant interactions.
E-6
Appendix E: BMP Design Fact Sheets
4
Operational BMPs-lnclude in
Table and Narrative
Cli1 Maintain landscaping using
minimum or no pesticides.
q See applicable operational
BMPs in Fact Sheet SC-41,
"Building and Grounds
Maintenance," in the CASQA
Storm Water Quality
Handbooks at
www .casqa.org/resources /bmp
-handbooks/municipal-bmp-
handbook.
1,.1 Provide IPM information to
new owners, lessees and
operators.
February 26, 2016
If These Sources Will Be
on the Project Site ...
1
Potential Sources of
Runoff Pollutants
□ E. Pools, spas,
ponds, decorative
fountains, and other
water features.
Iii Not Applicable
□ F. Food service
~ Not Applicable
Appendix E: BMP Design Fact Sheets
. .. Then Your SWQMP must consider These Source Control BMPs
2
Permanent Controls-Show on
Drawings
□ Show location of water feature
and a sanitary sewer cleanout in
an accessible area within 10 feet.
□ For restaurants, grocery stores,
and other food service
operations, show location
(indoors or in a covered area
outdoors) of a floor sink or other
area for cleaning floor mats,
containers, and equipment.
□ On the drawing, show a note that
this drain will be connected to a
grease interceptor before
discharging to the sanitary sewer.
3
Permanent Controls-List in Table
and Narrative
□ If the local municipality requires
pools to be plumbed to the sanitary
sewer, place a note on the plans and
state in the narrative that this
connection will be made according to
local requirements.
□ Describe the location and features of
the designated cleaning area.
□ Describe the items to be cleaned in
this facility and how it has been sized
to ensure that the largest items can be
accommodated.
E-7
4
Operational BMPs-lnclude
in
Table and Narrative
□ See applicable operational
BMPs in Fact Sheet SC-72,
"Fountain and Pool
Maintenance," in the CASQA
Storm Water Quality
Handbooks at
www.casqa.org/resources /bm
p-handbooks/municipal-
bmp-handbook.
February 26, 2016
If These Sources Will
Be on the Project Site
1
Potential Sources
of
rn G. Refuse areas
D Not Applicable
Appendix E: BMP Design Fact Sheets
... Then Your SWQMP must consider These Source Control BMPs
2
Permanent Controls-Show
on Drawings
IX! Show where site refuse and
recycled materials will be
handled and stored for
pickup. See local municipal
requirements for sizes and
other details of refuse areas.
l]I If dumpsters or other
receptacles are outdoors,
show how the designated
area will be covered, graded,
and paved to prevent run-
on and show locations of
berms to prevent runoff
from the area. Also show
how the designated area will
be protected from wind
dispersal.
Gl Any drains from dumpsters,
compactors, and tallow bin
areas must be connected to
a grease removal device
before discharge to sanitary
sewer.
3
Permanent Controls-List
in Table and Narrative
~ State how site refuse will
be handled and provide
supporting detail to what
is shown on plans.
~ State that signs will be
posted on or near
dumpsters with the
words "Do not dump
hazardous materials
here" or sim.ilar.
E-8
4
Operational BMPs-lnclude in
Table and Narrative
6'I State how the following will be implemented:
Provide adequate number of receptacles. Inspect
receptacles regularly; repair or replace leaky
receptacles. Keep receptacles covered.
Prohibit/ prevent dumping of liquid or hazardous
wastes. Post "no hazardous materials" signs. Inspect
and pick up litter daily and clean up spills
immediately. Keep spill control materials available
on-site. See Fact Sheet SC-34, "Waste Handling and
Disposal" in the CASQA Storm Water Quality
Handbooks at www.casqa.org/resources/bmp-
handbooks /municipal-bmp-handbook.
February 26, 2016
1
Potential Sources of
Runoff Pollutants
□ H. Industrial
processes.
:0 Not Applicable
□ I. Outdoor storage
of equipment or
materials. (Sec rows J
and K for source
control measures for
vehicle cleaning,
repair, and
maintenance.)
6'l Not Applicable
2
Permanent Controls-Show on
Drawings
□
□
□
Show process area.
Show any outdoor storage
areas, including how materials
will be covered. Show how
areas will be graded and
bermed to prevent run-on or
runoff from area and
protected from wind dispersal.
Storage of non-hazardous
liquids must be covered by a
roof and/ or drain to the
sanitary sewer system, and be
contained by berms, dikes,
liners, or vaults.
□ Storage of hazardous materials
and wastes must be in
compliance with the local
hazardous materials ordinance
and a Hazardous Materials
Management Plan for the site.
Appendix E: BMP Design Fact Sheets
3
Permanent Controls-Listin Table and
Narrative
□ If industrial processes are to be located
onsite, state: "All process activities to be
performed indoors. No processes to
drain to exterior or to storm drain
system."
□ Include a detailed description of
materials to be stored, storage areas, and
structural features to prevent pollutants
from entering storm drains.
Where appropriate, reference
documentation of compliance with the
requirements of local Hazardous
Materials Programs for:
• Hazardous Waste Generation
• Hazardous Materials Release
Response and Inventory
• California Accidental Release
Prevention Program
• Aboveground Storage Tank
• Uniform Fire Code Article 80
Section 103(6) & (c) 1991
• Underground Storage Tank
E-9
4
Operational BMPs-Include
in Table and Narrative
Table and Narrative
□ See Fact Sheet SC-10, "Non-
Storm Water Discharges" in
the CASQA Storm Water
Quality Handbooks at
https: // www.casqa.org/resou
rces/bmo-handbooks.
□ See the Fact Sheets SC-31,
"Outdoor Liquid Container
Storage" and SC-33,
"Outdoor Storage of Raw
Materials" in the CASQA
Storm Water Quality
Handbooks at
www.casqa.org/resources /bm
p-handbooks/municipal-bmp-
handbook.
February 26, 2016
1
Potential Sources of
Runoff Pollutants
□ J. Vehicle and
Equipment Cleaning
~ Not Applicable
2
Permanent Controls-Show on Drawings
□ Show on drawings as appropriate:
(1) Commercial/industrial facilities having
vehicle / equipment cleaning needs must
either provide a covered, bermed area for
washing actl.Vltles or discourage
vehicle/ equipment washing by removing
hose bibs and installing signs prohibiting such
uses.
(2) Multi-dwelling complexes must have a
paved, bermed, and covered car wash area
(unless car washing is prohibited onsite and
hoses are provided with an automatic shut-
off to discourage such use).
(3) Washing areas for cars, vehicles, and
equipment must be paved, designed to
prevent run-on to or runoff from the area,
and plumbed to drain to the sanitary sewer.
(4) Commercial car wash facilities must be
designed such that no runoff from the facility
is discharged to the storm drain system.
Wastewater from the facility must discharge
to the sanitary sewer, or a wastewater
reclamation system must be installed.
E-10
3
Permanent Controls-List in
Table and Narrative
□ If a car wash area is not
provided, describe measures
taken to discourage onsite
car washing and explain how
these will be enforced.
Appendix E: BMP Design Fact Sheets
4
Operational BMPs-lnclude in
Table and Narrative
Describe operational measures to
implement the following (if
applicable):
□ Washwater from vehicle and
equipment washing operations
must not be discharged to the
storm drain system.
□ Car dealerships and similar
may rinse cars with water
only.
□ See Fact Sheet SC-21,
"Vehicle and E quipment
Cleaning," in the CASQA
Storm Water Quality
Handbooks at
www.casqa.org/resources/bm
p-handbooks /municipal-bmp-
handbook.
February 26, 2016
1
Potential Sources of
Runoff Pollutants
□ K.
Vehicle/Equipment
Repair and
Maintenance
E:I Not Applicable
□
□
□
2
Permanent Controls-Show on
Drawings
Accommodate all vehicle
equipment repair and
maintenance indoors. Or
designate an outdoor work area
and design the area to protect
from rainfall, run-on runoff, and
wind dispersal.
Show secondary containment for
exterior work areas where motor
oil, brake fluid, gasoline, diesel
fuel, radiator fluid, acid-
containing batteries or other
hazardous materials or hazardous
wastes are used or stored. Drains
must not be installed within the
secondary containment areas.
Add a note on the plans that
states either (1) there are no floor
drains, or (2) floor drains are
connected to wastewater
pretreatment systems prior to
discharge to the sanitary sewer
and an industrial waste discharge
permit will be obtained.
3
Permanent Controls-List in
Table and Narrative
□
□
□
State that no vehicle repair or
maintenance will be done
outdoors, or else describe the
required features of the
outdoor work area.
State that there are no floor
drains or if there are floor
drains, note the agency from
which an industrial waste
discharge permit will be
obtained and that the design
meets that agency's
requirements.
State that there are no tanks,
containers or sinks to be used
for parts cleaning or rinsing
or, if there are, note the
agency from which an
industrial waste discharge
permit will be obtained and
that the design meets that
agency's requirements.
E-11
Appendix E: BMP Design Fact Sheets
4
Operational BMPs-Include in
Table and Narrative
In the report, note that all of the following
restrictions apply to use the site:
□ No person must dispose of, nor permit
the disposal, directly or indirectly of
vehicle fluids, hazardous materials, or
rinsewater from parts cleaning into
storm drains.
□ No vehicle fluid removal must be
performed outside a building, nor on
asphalt or ground surfaces, whether
inside or outside a building, except in
such a manner as to ensure that any
spilled fluid will be in an area of
secondary containment. Leaking
vehicle fluids must be contained or
drained from the vehicle immediately.
□ No person must leave unattended drip
parts or other open containers
containing vehicle fluid, unless such
containers are in use or in an area of
secondary containment.
February 26, 2016
□
Kl
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls-Show on
Drawings
L. Fuel Dispensing I □ Fueling areas 16 must have
impermeable floors (i.e., portland
cement concrete or equivalent smooth
impervious surface) that are (1) graded
Areas
Not Applicable
at the minimum slope necessary to
prevent ponding; and (2) separated
from the rest of the site by a grade
break that prevents run-on of storm
water to the MEP.
D Fueling areas must be covered by a
canopy that extends a minimum of ten
feet in each direction from each
pump. [Alternative: The fueling area
must be covered and the cover's
minimum dimensions must be equal
to or greater than the area within the
grade break or fuel dispensing areal.]
The canopy [or cover] must not drain
onto the fueling area.
3
Permanent Controls-List
in Table and Narrative
Appendix E: BMP Design Fact Sheets
4
Operational BMPs-Include in
Table and Narrative
□ The property owner must dry sweep
the fueling area routinely.
D See the Business Guide Sheet,
"Automotive Service-Service
Stations" in the CASQA Storm
Water Quality Handbooks at
https://www.casqa.org/resources/b
mp-handbooks.
16 The fueling area must be defined as the area extending a minimum of 6.5 feet from the comer of each fuel dispenser or the length at which the hose and nozzle assembly may be
operated plus a minimum of one foot, whichever is greater.
E-12 February 26, 2016
1
Potential Sources of
Runoff Pollutants
M. Loading Docks
Kl Not Applicable
2
Permanent Controls-Show on
Drawings
□ Show a preliminary design for the
loading dock area, including
roofing and drainage. Loading
docks must be covered and/ or
graded to minimize run-on to and
runoff from the loading area. Roof
downspouts must be positioned to
direct storm water away from the
loading area. Water from loading
dock areas should be drained to
the sanitary sewer where feasible.
Direct connections to storm
drains from depressed loading
docks are prohibited.
□ Loading dock areas draining
directly to the sanitary sewer must
be equipped with a spill control
valve or equivalent device, which
must be kept closed during
periods of operation.
□ Provide a roof overhang over the
loading area or install door skirts
(cowling) at each bay that enclose
the end of the trailer.
3
Permanent
Controls-List in
E-13
Appendix E: BMP Design Fact Sheets
4
Operational BMPs-Include in
Table and Narrative
D Move loaded and unloaded items indoors as
soon as possible.
□ See Fact Sheet SC-30, "Outdoor Loading and
Unloading," in the CASQA Storm Water
Quality Handbooks at
www.casqa.org/resources /bmp-
handbooks /municipal-bmp-handbook.
February 26, 2016
1
Potential Sources of
Runoff Pollutants
~ N. Fire Sprinkler
Test Water
D Not Applicable
0. Miscellaneous Drain
or Wash Water
□ Boiler drain lines
□ Condensate drain
lines
□ Rooftop
equipment
□ Drainage sumps
□ Roofing, gutters,
and trim
Ciit Not Applicable
2
Permanent Controls-
Show on Drawings
Appendix E: BMP Design Fact Sheets
~
3
Permanent Controls-List in Table and
Narrative
Provide a means to drain fire sprinkler test water
to the sanitary sewer.
□ Boiler drain lines must be directly or indirectly
connected to the sanitary sewer system and may
not discharge to the storm drain system.
□ Condensate drain lines may discharge to
landscaped areas if the flow is small enough that
runoff will not occur. Condensate drain lines
may not discharge to the storm drain sys tem.
□ Rooftop mounted equipment with potential to
produce pollutants must be roofed and/ or have
secondary containment.
□ Any drainage sumps onsite must feature a
sediment sump to reduce the quantity of
sediment in pumped water.
□ Avoid roofing, gutters, and trim made of copper
or other unprotected metals that may leach into
runoff.
E-14
4
Operational BMPs-Include in
Table and Narrative
q See the note in Fact Sheet SC-
41, "Building and Grounds
Maintenance," in the CASQA
Storm Water Quality
Handbooks at
www.casqa.org/resources /bm
p-handbooks/municipal-bmp-
handbook
February 26, 2016
1
Potential Sources of
Runoff Pollutants
Kl P.
sidewalks,
parking lots.
D Not Applicable
Plazas,
and
2
Permanent Controls-Show on
Drawings
3
Permanent Controls-List in
Table and Narrative
E-15
Appendix E: BMP Design Fact Sheets
4
Operational BMPs-Include in
Table and Narrative
lia Plazas, sidewalks, and parking lots must
be swept regularly to prevent the
accumulation of litter and debris.
Debris from pressure washing must be
collected to prevent entry into the
storm drain system. Washwater
containing any cleaning agent or
degreaser must be collected and
discharged to the sanitary sewer and
not discharged to a storm drain.
February 26, 2016
ATTACHMENT 1
BACKUP FOR PDP POLLUTANT CONTROL BMPS
This is the cover sheet for Attachment 1 .
Check which Items are Included behind this cover sheet:
Attachment Contents Checklist
Sequence
Attachment 1 a OMA Exhibit (Required)
Attachment 1 b
Attachment 1 c
Attachment 1 d
See OMA Exhibit Checklist on the
back of this Attachment cover sheet.
(24"x36" Exhibit typically required)
Tabular Summary of DMAs Showing
OMA ID matching OMA Exhibit, OMA
Area, and OMA Type (Required)*
*Provide table in this Attachment OR
on OMA Exhibit in Attachment 1 a
Form 1-7, Harvest and Use Feasibility
Screening Checklist (Required unless
the entire project will use infiltration
BMPs)
Refer to Appendix B.3-1 of the BMP
Design Manual to complete Form 1-7.
Form 1-8, Categorization of Infiltration
Feasibility Condition (Required unless
the project will use harvest and use
BMPs)
Refer to Appendices C and D of the
BMP Design Manual to complete
Form 1-8.
X Included
X Included on OMA Exhibit in
Attachment 1 a
□ Included as Attachment 1 b,
separate from OMA Exhibit
X Included
□ Not included because the entire
project will use infiltration BMPs
X Included
□ Not included because the entire
project will use harvest and use
BMPs
Attachment 1e Pollutant Control BMP Design X Included
Worksheets / Calculations (Required)
Refer to Appendices B and E of the
BMP Design Manual for structural
pollutant control BMP design
guidelines
ATTACHMENT 1
Use this checklist to ensure the required information has been included on the OMA
Exhibit:
The OMA Exhibit must identify:
□ Underlying hydrologic soil group
□ Approximate depth to groundwater
□ Existing natural hydrologic features (watercourses, seeps, springs, wetlands)
□ Critical coarse sediment yield areas to be protected (if present)
□ Existing topography and impervious areas
□ Existing and proposed site drainage network and connections to drainage offsite
□ Proposed grading
□ Proposed impervious features
□ Proposed design features and surface treatments used to minimize imperviousness
□ Drainage management area (OMA) boundaries, OMA ID numbers, and OMA areas (square
footage or acreage), and OMA type (i.e., drains to BMP, self-retaining, or self-mitigating)
□ Structural BMPs (identify location and type of BMP)
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PROPER'TY OWNER
CARI.S8AD (WIS NOR TH \£N Tl.IRES LP.
ADORCSS:J51$K(N'l'OfJS11l(Cr.Sl.ftr200 SAN DICOO, CA 91110 CON/ACT: DENI SlillTH •TECH CCNIRACTORS
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Appendix B: Storm Water Pollutant Control Hydrologic Calculations and Sizing Methods
Wkh B31H d U F "b"li S .
Harvest and Use Feasibility Screening Form 1-7
1. Is there a demand for harvested water (check all that apply) at the project site that is reliably present
during the wet season?
IXI Toilet and urinal flushing
IXI Landscape irrigation
D Other: _____ _
2. If there is a demand; estimate the anticipated average wet season demand over a period of 36 hours.
Guidance for planning level demand calculations for toilet/urinal flushing and landscape irrigation is
provided in Section B.3.2.
Toilet & Urinal Flushing: 20 employees (36 hour total) = 44.1 c.f.
Landscape Irrigation: Total Planted Area 74,715 s.f., w/drought tolerant low water use
(36 hour total) = 60 c.f.
Anticipated Total Use Over 36 hours = 104 c.f.
3. Calculate the DCV using worksheet B-2.1.
7,662 c.f.
0.25 DCV = 1,916 c.f.
3a. Is the 36-hour demand greater
than or equal to the DCV?
Yes /X No ~
JJ
Harvest and use appears to be
feasible. Conduct more detailed
evaluation and sizing calculations
to confirm that DCV can be used
at an adequate rate to meet
drawdown criteria.
36. Is the 36-hour demand greater than
0.25DCV but less than the full DCV?
Yes /X No ~
Harvest and use may be feasible.
Conduct more detailed evaluation and
sizing calculations to determine
feasibility. Harvest and use may only be
able to be used for a portion of the site,
or (optionally) the storage may need to
be upsized to meet long term capture
targets while draining in longer than 36
hours.
3c. Is the 36-hour demand
less than 0.25DCV?
XYes
Harvest and use is
considered to be infeasible.
X
Appendix I: Forms and Checklists
'"~ c~~~:gorizati~~ of !~filtration Feasibility Form 1-8 .. ,
Condition
Part 1-Full Infiltration Feasibility Screening Criteria
Would infiltration of the full design volume be feasible from a physical perspective without any undesirable
consequences that cannot be reasonably mitigated?
Criteria Screening Question
Is the estimated reliable infiltration rate below proposed
facility locations greater than 0.5 inches per hour? The response
to this Screening Question shall be based on a comprehensive
evaluation of the factors presented in Appendix C.2 and Appendix
D.
Provide basis:
Yes No
X
As discussed in Sections 4 and 8.13 of the update geotechnical report, the lot consists of dense to very stiff
compacted fill overlying hard granitic rock. The bedrock is also exposed at grade. After planned grading, the
compacted fill will be approximately 5 to 55 feet thick and bedrock will also be near or at grade. Previous
infiltration testing performed on other lots within the Carlsbad Oaks North Business Park with similar soi l
conditions (see Geocon Inc., report titled Update Geotechnical Report, Carlsbad Oaks North Business Park -Lol
17, Carlsbad, California, dated March 25, 2016 (Proeject No. 06442-32-21) indicated a factored infiltration rate
between J0-4 to 10-1 iph (after applying a feasibility factor of safety of2).
2
Can infiltration greater than 0.5 inches per hour be allowed
without increasing risk of geotechnical hazards ( slope stability,
groundwater mounding, utilities, or other factors) that cannot
be mitigated to an acceptable level? The response to this
Screening Question shall be based on a comprehensive evaluation of
the factors presented in Appendix C.2.
Provide basis:
X
rrhe site is underlain by dense to very stiff compacted fill overlying hard granitic rock. After planned grading, the
compacted fill will be approximately 5 to 50 feet thick and bedrock will also be near or at grade. Based on existing
and ultimate geologic conditions, infiltration could not be incorporated without increasing the risk of geotechnical
hazards including uncontrolled water lateral migration, shrinking and swelling, induced hydro-compression of the
fill and water mi gration within pipe zone of underground utilities.
1-3 February 2016
Appendix I: Forms and Checklists
Criteria
3
Form I-8 Page 2 of 4
Screening Question
Can infiltration greater than 0.5 inches per hour be allowed
without increasing risk of groundwater contamination ( shallow
water table, storm water pollutants or other factors) that cannot
be mitigated to an acceptable level? The response to this
Screening Question shall be based on a comprehensive evaluation of
the factors presented in Appendix C.3.
Provide basis:
Yes No
X
Groundwater is not located within 10 feet of proposed BMP basins. The risk of storm water infiltration adversely
impacting groundwater is considered negligible.
4
Can infiltration greater than 0.5 inches per hour be allowed
without causing potential water balance issues such as change
of seasonality of ephemeral streams or increased discharge of
contaminated groundwater to surface waters? The response to
this Screening Question shall be based on a comprehensive
evaluation of the factors presented in Appendix C.3.
Provide basis:
Researching downstream water rights and evaluating water balance issues to stream flows is beyond the scope of
the geotechnical engineer.
Part 1
Result
*
If all answers to rows 1 -4 are "Yes" a full infiltration design is potentially feasible.
The feasibility screening category is Full Infiltration
If any answer from row 1-4 is "No", infiltration may be possible to some extent but
would not generally be feasible or desirable to achieve a "full infiltration" design.
Proceed to Part 2
NO
*To be completed using gathered site information and best professional judgment considering the definition ofMEP in
the MS4 Permit. Additional tes ting and/ or studies may be required by the City to substantiate findings.
1-4 February 2016
Appendix I: Forms and Checklists
Part 2 -Partial Infiltration vs. No Infiltration Feasibility ScreeningCriteria
Would infiltration of water in any appreciable amount be physically feasible without any negative
consequences that cannot be reasonably mitigated?
Criteria
5
Screening Question
Do soil and geologic conditions allow for infiltration in any
appreciable rate or volume? The response to this Screening
Question shall be based on a comprehensive evaluation of the
factors presented in Appendix C.2 and AppendixD.
Provide basis:
Yes No
X
The site is underlain by dense to very stiff compacted fill overlying hard granitic rock. After planned grading, the
compacted fill will be approximately 5 to 50 feet thick. The bedrock is also exposed at grade. Previous
infiltration testing performed on other lots within the Carlsbad Oaks North Business Park with similar soi l
conditions (see Geocon Inc., report titled Update Geotechnical Report, Carlsbad Oaks North Business Park -Loi
17, Carlsbad, California, dated March 25, 2016 (Proeject No. 06442-32-21) indicated a factored infiltration rate
between 10-4 to 10-1 iph (after applying a feasibility factor of safety of 2).
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/ data source applicability and why it was not feasible to mitigate low infiltration rates.
6
Can Infiltration in any appreciable quantity be allowed
without increasing risk of geotechnical hazards (slope
stability, groundwater mounding, utilities, or other factors)
that cannot be mitigated to an acceptable level? The response
to this Screening Question shall be based on a comprehensive
evaluation of the factors presented in Appendix C.2.
Provide basis:
X
The site is underlain by dense to very stiff compacted fill overlying hard granitic rock. After planned grading, the
compacted fill will be approximately 5 to 50 feet thick and bedrock will also be near or at grade. Based on
existing and ultimate geologic conditions, infiltration could not be incorporated without increasing the risk of
geotechnical hazards including uncontrolled water lateral migration, shrinking and swelling, induced hydro-
compression of the fill and water migration within pipe zone of underground utilities.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability and why it was not feasible to mitigate low infiltrationrates.
1-5 February 2016
Appendix I: Forms and Checklists
') ~ .. , ,__ ~ , '~".-'V/'-1:"'' l' ••~1f): '.',c/ ~•,a•,,,~
•. · Forµ-i J:-8 Page 4 of 4
Criteria
7
Screening Question
Can Infiltration in any appreciable quantity be allowed
without posing significant risk for groundwater related
concerns (shallow water table, storm water pollutants or other
factors)? The response to this Screening Question shall be based
on a comprehensive evaluation of the factors presented in
Appendix C.3.
Provide basis:
Yes No
X
Groundwater is not located within l O feet of proposed BMP basins. The risk of storm water infiltration adversely
impacting groundwater is considered negligible.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/ data source applicability and why it was not feasible to mitigate low infiltration rates.
8
Can infiltration be allowed without violating downstream
water rights? The response to this Screening Question shall be
based on a comprehensive evaluation of the factors presented in
Appendix C.3.
Provide basis:
Researching downstream water rights and evaluating water balance issues to stream flows is beyond the scope of
he geotechnical engineer.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/ data source applicability and why it was not feasible to mitigate low infiltration rates.
Part 2
Result*
If all answers from row 5-8 are yes then partial infiltration design is potentially feasible.
The feasibility screening category is Partiallnfiltration.
If any answer from row 5-8 is no, then infiltration of any volume is considered to be
infeasible within the drainage area. The feasibility screening category is No Infiltration.
No
Infiltration
*To be completed using gathered site information and best professional judgment considering the definition ofMEP in
the MS4 Permit. Additional testing and/ or studies may be required by the City to substantiate findings.
1-6 February 2016
Runoff Factors
DMAA s.f. (A) acres (C) Runoff CxA
Roof 35256 0.809 0.9 0.73
Pvmt 41059 0.943 0.9 0.85
Hardscape 4705 0.108 0.9 0.10
Landscape 37345 0.857 0.1 0.09
total 118365 2.717 1.76
Composite C 0.65
DMAB s.f. (A) acres (C) Runoff CxA
Roof 20380 0.468 0.9 0.42
Pvmt 42495 0.976 0.9 0.88
Hardscape 7165 0.164 0.9 0.15
Landscape 35860 0.823 0.1 0.08
total 105900 2.431 1.53
Composite C 0.63
Appendix B: Storm Water Pollutant Control Hydrologic Calculations and Sizing Methods
Worksheet B.2-1 DCV
DMAA
1 85th percentile 24-hr storm depth from Figure B.1-1 d= 0.64 inches
2 Area tributary to BMP (s) A= 2.72 acres
3 Area weighted runoff factor ( estimate using Appendix B.1.1 and C= 0.65 unitless
4 Trees Credit Volume TCV= cubic-feet
5 Rain barrels Credit Volume RCV= cubic-feet
6 Calculate D CV = (3630 x C x d x A) -TCV -RCV DCV= 4103 cubic-feet
DMAB
1 85th percentile 24-hr storm depth from Figure B.1-1 d= 0.64 inches
2 Area tributary to BMP (s) A= 2.43 acres
Ar a ight d runoff factor ( estimate using Appendix B.1.1 and C= 0.63 unitless
4 Trees Credit Volume TCV= cubic-feet
5 Rain barrels Credit Volume RCV= cubic-feet
6 Calculate D CV = (3630 x C x d x A) -TCV -RCV DCV= 3558 cubic-feet
Appendix B: Storm Water Pollutant Control Hydrologic Calculations and Sizing Methods
Worksheet B.5-1: Simple Sizing Method for Biofiltration BMPs
DMAA ._ .. ,. ... _ lill■un-•• • • 1111 ,... • •
CV after implementing retention BMPs 4,103.00 cubic-feet
Partial Retention
2 Infiltration rate from Worksheet D.5-1 if partial infiltration is feasible 0.00 in/hr.
3 Allowable drawdown time for airn:regate storage below the underdrain 36 hours
4 Depth of runoff that can be infiltrated [Line 2 x Line 3] 0 inches
5 Aggregate pore space 0.4 in/in
6 Required depth of gravel below the underdrain [Line 4/ Line 5] 3 inches
7 Assumed surface area of the biofiltration BMP 5,940.00 sq-ft
8 Media retained pore storage 0.1 in/in
9 Volume retained by BMP [[Line 4 + (Line 12 x Line 8)]/12] x Line 7 891.00 cubic-feet
10 DCV that requires biofiltration [Line 1 -Line 9] 3,212.00 cubic-feet
BMP Parameters
11 Surface Ponding [6 inch minimum, 12 inch maximum] 12.00 inches
12 Media Thickness [18 inches minimum], also add mulch layer thickness to this 18.00 inches
line for sizing calculations
13 Aggregate Storage above underdrain invert (12 inches typical) -use 0 15.00 inches
inches for sizing if the aggregate is not over the entire bottom surface area
14 Freely drained pore storage 0.2 in/in
15 Media filtration rate to be used for sizing (5 in/hr. with no outlet control; if the 1.13 in/hr.
filtration rate is controlled by the outlet use the outlet controlled rate which will be
less than 5 in/hr.)
Baseline Calculations
16 Allowable Routing Time for sizing 6 hours
17 Depth filtered during storm [ Line 15 x Line 16] 6.78 inches
18 Depth of Detention Storage 21.6 inches
[Line 11 + (Line 12 x Line 14) + (Line 13 x Line 5)]
19 Total D epth Treated [Line 17 + Line 18] 28.38 inches
Ootion 1-Biofilter 1.5 times the DCV
20 Required biofiltered volume [1.5 x Line 10] 4,818.00 cubic-feet
21 Required Footprint [Line 20/ Line 19] x 12 2,037.21 sq-ft
Option 2 -Store 0.75 of remaining DCV in pores and ponding
22 Required Storage (surface+ pores) Volume [0.75 x Line 10] 2,409.00 cubic-feet
23 Required Footprint [Line 22/ Line 18] x 12 1,338.33 sq-ft
Footprint of the BMP
24 Area draining to the BMP 118,365.00 sq-ft
25 Adjusted Runoff Factor for drainage area (Refer to Appendix B.1 and 0.65
26 BMP Footprint Sizing Factor (Default 0.03 or an alternative) 0.03
27 Minimum BMP Footprint [Line 24 x Line 25 x Line 26] 2,308 sq-ft
28 Footprint of the BMP = Maximum(Minimum(Line 21, Line 23), Line 27) 2,308 sq-ft
Check for Volume Reduction [Not applicable for No Infiltration Condition] (N/ A per form 1-8)
29 Calculate the fraction of DCV retained in the BMP [Line 9 /Line 1] 0.22 unitless
30 Minimum required fraction of DCV retained for partial infiltration 0.3 75 unitless
31 Is the retained DCV 2: 0.375? If the answer is no increase the footprint sizing □ Yes □ No XN/A
Appendix B: Storm Water Pollutant Control Hydrologic Calculations and Sizing Methods
Worksheet B.5-1: Simple Sizing Method for Biofiltration BMPs
DMA B __ ..... "'" ....... _
1 Remaining D CV after implementing retention BMPs 3,558.00 cubic-feet
Partial Retention
2 Infiltration rate from Worksheet D.5-1 if partial infiltration is feasible 0.00 in/hr.
3 Allowable drawdown time for aggregate storage below the underdrain 36 hours
4 Depth of runoff that can be infiltrated [Line 2 x Line 31 0 inches
5 A2:2:regate pore space 0.4 in/in
6 Required depth of gravel below the underdrain [Line 4/ Line SJ 3 inches
7 Assumed surface area of the biofiltration BMP 5,160.00 sq-ft
8 Media retained pore storage 0.1 in/in
9 Volume retained by BMP [[Line 4 + (Line 12 x Line 8))/12) x Line 7 774.00 cubic-feet
10 DCV that requires biofiltration [Line 1 -Line 9) 2,784.00 cubic-feet
BMP Parameters
11 Surface Ponding [6 inch minimum, 12 inch maximum] 12.00 inches
12 Media Thickness [18 inches minimwn], also add mulch layer thickness to this 18.00 inches
line for sizing calculations
13 Aggregate Storage above underdrain invert (12 inches typical) -use 0 15.00 inches
inches for sizing if the aggregate is not over the entire bottom surface area
14 Freely drained pore storage 0.2 in/in
15 Media filtration rate to be used for sizing (5 in/hr. with no outlet control; if the 1.1 3 in/hr.
filtration rate is controlled by the outlet use the outlet controlled rate which will be
less than 5 in/hr.)
Baseline Calculations
16 Allowable Routing Time for sizing 6 hours
17 Depth filtered during storm [ Line 15 x Line 16) 6.78 inches
18 Depth of Detention Storage 21.6 inches
[Line 11 + (Line 12 x Line 14) + (Line 13 x Line 5))
19 Total Depth Treated [Line 17 + Line 18) 28.38 inches
Option 1-Biofilter 1.5 times the DCV
20 Required biofiltered volwne [1.5 x Line 10) 4,176.00 cubic-feet
21 Required Footprint [Line 20/ Line 19) x 12 1,765.75 sq-ft
Option 2 -Store 0. 75 of remaining DCV in pores and ponding
22 Required Storage (surface+ pores) Volume [0.7 5 x Line 10) 2,088.00 cubic-feet
23 Required Footprint [Line 22/ Line 18) x 12 1,160.00 sq-ft
Footprint of the BMP
24 Area draining to the BMP 105,900.00 sq-ft
25 Adjusted Runoff Factor for drainage area (Refer to Appendix B.1 and 0.63
26 BMP Footprint Sizing Factor (Default 0.03 or an alternative) 0.03
27 Minimum BMP Footprint [Line 24 x Line 25 x Line 26) 2,002 sq-ft
28 Footprint of the BMP = Maximum(Minimwn(Line 21, Line 23), Line 27) 2,002 sq-ft
Check for Volume Reduction [Not applicable for No Infiltration Condition] (N/ A per form 1-8)
29 Calculate tl1e fraction of DCV retained in the BMP [Line 9 /Line 1] 0.22 unitless
30 Minimum required fraction of DCV retained for partial infiltration 0.375 unitless
31 Is the retained DCV 2: 0.375? If the answer is no increase the footprint sizing □ Yes □ No XN/A
BACKUP FOR PDP HYDROMODIFICATION CONTROL MEASURES
[This is the cover sheet for Attachment 2.]
Indicate which Items are Included behind this cover sheet:
Attachment Contents Checklist
Sequence
Attachment 2a Hydromodification Management X Included
Exhibit (Required)
See Hydromodification Management
Exhibit Checklist on the back of this
Attachment cover sheet.
Attachment 2b Management of Critical Coarse X Exhibit showing project drainage
Sediment Yield Areas (WMAA Exhibit boundaries marked on WMAA
is required, additional analyses are Critical Coarse Sediment Yield
optional) Area Map (Required)
See Section 6.2 of the BMP Design Optional analyses for Critical Coarse
Manual. Sediment Yield Area Determination
□ 6.2.1 Verification of Geomorphic
Landscape Units Onsite
□ 6.2.2 Downstream Systems
Sensitivity to Coarse Sediment
□ 6.2.3 Optional Additional Analysis
of Potential Critical Coarse
Sediment Yield Areas Onsite
Attachment 2c Geomorphic Assessment of Receiving X Not performed
Channels (Optional) □ Included
See Section 6.3.4 of the BMP Design
Manual.
Attachment 2d Flow Control Facility Design and X Included
Structural BMP Drawdown
Calculations (Required)
See Chapter 6 and Appendix G of the
BMP Design Manual
ATTACHMENT 2
Use this checklist to ensure the required information has been included on the
Hydromodification Management Exhibit:
The Hydromodification Management Exhibit must identify:
□ Underlying hydrologic soil group
□ Approximate depth to groundwater
D Existing natural hydrologic features ( watercourses, seeps, springs, wetlands)
□ Critical coarse sediment yield areas to be protected (if present)
□ Existing topography
□ Existing and proposed site drainage network and connections to drainage offsite
□ Proposed grading
□ Proposed impervious features
□ Proposed design features and surface treatments used to minimize imperviousness
□ Point(s) of Compliance (POC) for Hydromodification Management
□ Existing and proposed drainage boundary and drainage area to each POC (when necessary,
create separate exhibits for pre-development and post-project conditions)
□ Structural BMPs for hydromodification management (identify location, type of BMP, and
size/detail)
\
d
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PROJECT ADDRESS:
lOTJ. ... TA.l IO<P CIR'lSBAD.CA91008
PROPERTY OWNER
CARI.SBAD('l,I.KSHCWTH'oOI/Ulifil.P. ~.J.PSKCNrrJNSTRCCT.SlATr200 SAN Dt£ct), CA 92110 ca,/IACI: DCM Sl.ltrH •TCCH CONrftACTOIIS PHOIIC NO: ('79) 22.J-166)
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MAINTENANCE PLATE DETAIL
ATW:HfOINfCRIORIII.CTIMUOF
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CARLSBAD. C.t. 92006
Self Mitigating Areas:
SM 1,510 s.f. Landscaping
(
BMP Sizing Spreadsheet V3.0
Project Name: Lot 3, Whiptail Loop
Project Applicant: Tech Contractors c/o Dean Smith
Jurisdiction: City of Carlsbad
Parcel (APN): 209-120-02
Hydrologic Unit: Carlsbad
Rain Gauge: Oceanside
Total Project Area (sf): Enter Total Project Area
Channel Susceptibility: High
BMP Sizing Spreadsheet V3.0
Proiect Name: lot 3, Whiotail loop HydrololliC Unit: Carlsbad
Project Applicant: Tech Contractors c/o Dean Smith Rain Gauge: Oceanside
Jurisdiction: City of Carlsbad Total Project Area: Enter Total Project Area
Parcel !APNl: 209·12CMl2 low Flow Threshold: 0.1Q2
BMPName: A BMPType: Blofiltratlon
BMP Native Soil Type: D BMP Infiltration Rate (in/hr): 0.025
Areas Draining to BMP HMP Sizing Factors Minimum BMP Size
Area Weighted Runoff
OMA Pre Project Soil Post Project Factor Surface Area Surface Area (SF)
Name Area (sf) Type Pre-Project Slope Surface Type (Table G.2-1)1
A 35,256 D Flat Roofs 1.0 0.07 2468
A 41,059 D Flat Concrete 1.0 0.07 2874
A 4,705 D Flat Concrete 1,0 0.07 329
A 37,345 D Flat Landscape 0.1 0.07 261
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
BMP Tributary Area 118,365 Minimum BMP Size 5933
Proposed BMP Size• 5940 !• Assumes standard configuration
Surface Ponding Depth 12.00 in
Bioretention Soil Media Depth 18.00 in
Fitter Coarse 6.00 in
Gravel Storage Layer Depth 12 in
Underdrain Offset 3.0 in
t12W;
1. Runoff factors which are used for hydromodification management flow control (Table G.2-1) are different from the runoff factors used for pollutant control BMP sizing (Table B.1-1). Table references are taken from the San Diego Region Model BMP Design Manu
Describe the BMP's in sufficient detail in your PDP SWQMP to demonstrate the area, volume, and other criteria can be met within the constraints of the site.
BMP's must be adapted and applied to the conditions specific to the development project such as unstable slopes or the lack of available head.
Designated Staff have final review and approval authority over the project design.
This BMP Sizing Spreadsheet has been updated in conformance with the San Diego Region Model BMP Design Manual, April 2018. For questions or concerns please contact the jurisdiction in which your project is located.
BMP Sizing Spreadsheet V3.0
Project Name: Lot 3, Whiptail Loop Hydrologic Unit: Carlsbad
Project Applicant: rrech Contractors c/o Dean Smitt Rain Gauge: Oceanside
Jurisdiction: City of Carlsbad Total Project Area: Enter Total Project Area
Parcel (APN): 209-120-02 Low Flow Threshold: 0.1Q2
BMP Name A BMPType: Biofiltration
OMA Rain Gauge Pre-developed Condition Unit Runoff Ratio DMA Area (ac) Orifice Flow -%Q2 Orifice Area
Name Soil Type Slope (cfs/ac) (cfs) (in2)
A Oceanside D Flat 0.571 0.809 0.046 0.66
A Oceanside D Flat 0.571 0.943 0.054 0.77
A Oceanside D Flat 0.571 0.108 0.006 0.09
A Oceanside D Flat 0.571 0.857 0.049 0.70
3.75 0.155 2.21 1.68
Max Tot. Allowable Max Tot. Allowable Max Orifice Max Orifice Head Orifice Flow Orifice Area Diameter
.(feet) (cfs) (in2) (in)
0.145 0.155 2.22 1.680
Average outflow during Max Orifice Outflow Actual Orifice Area Selected
surface drawdown Orifice Diameter
(cfs) (cfs) (in2) (in)
Drawdown (Hrs) 11.4
BMP Sizing Spreadsheet V3.0
Proiect Name: Lot 3, Whiptail Loop Hydrolooic Unit: Carlsbad
Project Applicant: Tech Contractors c/o Dean Smith Rain Gauge: Oceanside
Jurisdiction: City of Carlsbad Total Project Area: Enter Total Project Area
Parcel (APN): 209-120--02 Low Flow Threshold: 0.1Q2
SMP Name: B BMPType: Bk>filtration
BMP Native Soil Type: D BMP Infiltration Rate (In/hr): 0.025
Areas Draining to BMP HMP Sizing Factors Minimum BMP Size
Area Weighted Runoff
OMA Pre Project Soil Post Project Factor Surface Area Surface Area (SF)
Name Area (sf) Type Pre•Project Slope Surface Type (Table G.2-1)1
B 20,380 D Flat Roofs 1.0 0.07 1427
B 42,495 D Flat Concrete 1.0 0.07 2975
B 7,165 D Flat Concrete 1.0 0.07 502
B 35,860 D Flat ~ndscape 0.1 0.07 251
o o
o o
o 0
o o
o o
o o
o o
o o
o o
o o
o o
BMP Tributary Area 105,900 Minimum BMP Size 5154
Proposed BMP Size• 5160 • Assumes standard configuration
Surface Ponding Depth 12.00 in
Bioretention Soll Media Depth 18.00 in
Filter Coarse 6.00 in
Gravel Storage Layer Depth 12 in
Underdrain Offset 3.0 in
Notes:
1. Runoff factors which are used for hydromodification management flow control {Table G.2·1) are different from the runoff factors used for pollutant control BMP sizing (Table 8.1·1). Table references are taken from the San Diego Region Model BMP Design Manu
Describe the BMP's in sufficient detail in your POP SWQMP to demonstrate the area, volume, and other criteria can be met within the constraints of the site.
BMP's must be adapted and applied to the conditions specific to the development project such as unstable slopes or the lack of available head.
Designated Staff have final review and approval authority over the project design.
This BMP Sizing Spreadsheet has been updated in conformance with the San Diego Region Model BMP Design Manual, April 2018. For questions or concerns please contact the jurisdiction in which your project is located.
BMP Sizing Spreadsheet V3.0
Project Name: Lot 3, Whiptail Loop Hydrologic Unit: Carlsbad
Project Applicant: Tech Contractors c/o Dean Smith Rain Gauge: Oceanside
Jurisdiction: City of Carlsbad Total Project Area: Enter Total Project Area
Parcel (APN}: 209-120-02 Low Flow Threshold: 0.1Q2
BMP Name B BMPType: Biofiltration
DMA Rain Gauge Pre-developed Condition Unit Runoff Ratio DMA Area (ac} Orifice Flow -%Q2 Orifice Area
Name Soil Type Slope (cfs/ac} (cfs} (in2}
B Oceanside D Flat 0.571 0.468 0.027 0.38
B Oceanside D Flat 0.571 0.976 0.056 0.79
B Oceanside D Flat 0.571 0.164 0.009 0.13
B Oceanside D Flat 0.571 0.823 0.047 0.67
3.75 0.139 1.98 1.59
Max Tot. Allowable Max Tot. Allowable Max Orifice Max Orifice Head Orifice Flow Orifice Area Diameter
(feet) (cfs} (in2) (in)
0.130 0.139 1.99 1.590
Average outflow during Max Orifice Outflow Actual Orifice Area Selected
surface drawdown Orifice Diameter
(cfs} (cfs} (in2} (in}
Drawdown (Hrs} 11.1
Structural BMP Maintenance Information
Use this checklist to ensure the required information has been included in the Structural
BMP Maintenance Information Attachment:
Preliminary Design/Planning/CEQA level submittal:
Attachment 3 must identify:
X Typical maintenance indicators and actions for proposed structural BMP(s) based
on Section 7.7 of the BMP Design Manual
Final Design level submittal:
Attachment 3 must identify:
o Specific maintenance indicators and actions for proposed structural BMP(s). This
shall be based on Section 7.7 of the BMP Design Manual and enhanced to reflect
actual proposed components of the structural BMP(s)
o How to access the structural BMP(s) to inspect and perform maintenance
o Features that are provided to facilitate inspection (e.g., observation ports,
cleanouts, silt posts, or other features that allow the inspector to view necessary
components of the structural BMP and compare to maintenance thresholds)
o Manufacturer and part number for proprietary parts of structural BMP(s) when
applicable
o Maintenance thresholds for BMPs subject to siltation or heavy trash(e.g., silt level
posts or other markings shall be included in all BMP components that will trap and
store sediment, trash, and/or debris, so that the inspector may determine how full
the BMP is, and the maintenance personnel may determine where the bottom of
the BMP is . If required, posts or other markings shall be indicated and described
on structural BMP plans.)
o Recommended equipment to perform maintenance
o When applicable, necessary special training or certification requirements for
inspection and maintenance personnel such as confined space entry or
hazardous waste management
OPERATION & MAINTENANCE (O&M) PLAN
1. Contents
1. PROJECT DESCRIPTION .................................................................................................. 1
2. OPERATION & MAINTENANCE (O&M) PLAN ........................................................... 1
3. Operation & Maintenance of BMP'S .................................................................................. 1
A. Training .............................................................................................................. 2
B. Landscaping ....................................................................................................... 2
C. Irrigation System ................................................................................................ 5
D. Roof Drains ........................................................................................................ 5
E. Trash Storage Areas .......................................................................................... 5
F. Storm Water Conveyance System Stenciling and Signing ................................. 5
G. Structural BMP: Biofiltration .............................................................................. 7
H. Outlet Structures ................................................................................................ 8
I. Vector Control Owner Responsibilities .................................................................. 8
ATTACHMENTS
Al. Inspection & Maintenance Schedule
Bl. Cost Estimate
Cl. BMP Training Log
D1. Inspection & Maintenance Log
-i-
1. PROJECT DESCRIPTION
Proposed land use is for a commercial development with 3 buildings, a parking lot, underground
utilities, covered trash enclosures, landscaping, and biofiltration for stormwater treatment.
2. OPERATION & MAINTENANCE (O&M) PLAN
This document has been prepared in compliance with the San Diego Regional Water Quality Control
Board requirements and in accordance with requirements set by the City. A Storm Water Quality
Management Plan (SWQMP) has been prepared for the project. It identifies the specific Best
Management Practices (BMPs) required for the project. Refer to this project's SWQMP for additional
information on BMPs. Proper maintenance of the project BMP's is required for their intended and
effective function. This O&M Plan provides operation and maintenance procedures for the BMPs
designated in the SWQMP. It includes procedures to be followed for inspection and maintenance of
the BMPs, instructions for documenting the work performed, record keeping, and outlining the
requirement and procedures for training of personnel involved in the process.
3. Operation & Maintenance of BMP'S
It shall be the responsibility of the "Owner or Designated Responsible Party" to maintain and to train
all employees for the maintenance and operation of all BMPs, to achieve the maximum pollutant
reduction they are designed for, as addressed in the approved Project's SWQMP. The following
schedule of O&M' s must be followed to satisfy the Conditions of Concern and the Pollutants of
Concern as addressed in the approved Project's SWQMP. This schedule shall include periodic
inspections of all Source Control and Treatment Control BMP's. All maintenance records for training,
inspection and maintenance shall be retained and provided to the city upon request.
The owner may also be required to provide to the City, as part of the maintenance and operation
agreement an executed access easement that shall be binding on the land throughout the life of the
project.
Responsible Party for O&M and For Training
Tech Contractors c/o Dean Smith
3575 Kenyon St., Suite 200, San Diego, CA 92110
619-223-1663
dean@techbilt.com
The Designated Responsible Party will be responsible for ensuring that individuals involved in O&M
activities, including but not limited to contractors and new owners, will be trained according to the
training program herein, Additionally, upon any future sale of the property, the Owner will be
responsible for ensuring that the new Designated Responsible Party is familiar with the contents
of the plan and the requirements for the routine inspection, routine and non-routine maintenance and
1
record keeping tasks as described herein. All parties involved in the O&M activities will be
required to read this plan.
A. Training
Personnel training is an important component of the implementation of this O&M Plan. The employee
training program may consist of a meeting with any new owners, Designated Responsible Party or
contractor/employees involved in the O&M activities to review the contents of this plan and
to physically tour the facility to observe the BMPs and describe O&M requirements for each BMP.
The Designated Responsible Party will implement the training program. All new contractors involved
in landscape and/or facility maintenance at the site shall receive training within 30-days of hire and
shall receive updated annual training. Maintenance contractor shall verify staff training annually.
The Designated Responsible Party shall be responsible for documenting all training activities and for
maintaining records related to training. Forms for documentation of training are included in
Attachment C 1 of this plan. Training records must be shall be retained and provided to the city upon
request.
B. Landscaping
Operational and maintenance needs include:
• Vegetation management to maintain adequate drainage and to limit habitat for mosquitoes,
rodents and other disease-carrying vectors. :)
• Parking lot sweeping.
• Animal and vector control (any method to limit or eradicate the mammals, birds, insects or
other arthropods which transmit disease pathogens).
• Periodic sediment removal to optimize performance.
• Trash, debris, grass trimmings, tree pruning, and leaf collection and removal to prevent
obstruction of landscape areas so as not to prohibit their use as a BMP.
• Monitoring irrigation equipment.
• Removal of standing water, which may contribute to the development of aquatic plant
communities or mosquito breeding areas.
• Preventive maintenance on sampling, flow measurement, and associated BMP equipment and
structures.
• Erosion and structural maintenance to prevent the loss of soil and maintain the performance of
all landscaping.
Inspection Frequency
The facility will be inspected and inspection visits will be completely documented:
• Once a month at a minimum.
• After every large storm (after every storm monitored or these storms with more than 0.50 inch
of precipitation.)
• On a weekly basis during extended periods of wet weather.
2
c·
Inspect for proper irrigation and fertilizer use, and ensure that all landscaped areas have minimum of
80% coverage.
Visual Inspection as part of landscape maintenance
• Inspect before and after the rainy season (Rainy season (Oct. 1 to April 30)).
Aesthetic Maintenance
The following activities will be included in the aesthetic maintenance program:
Grass Trimming: Trimming of grass will be done on all landscaped areas, around fences, at the inlet
and outlet structures, and sampling structures.
Weed Control. Weeds will be removed through mechanical means. Herbicide shall not be used
because these chemicals will impact the water quality monitoring.
Functional Maintenance
Functional maintenance has two components:
• Preventive maintenance
• Corrective maintenance
Preventive Maintenance
Preventive maintenance activities to be instituted for landscaped areas are:
•
•
•
•
•
•
Grass Mowing: Vegetation seed, mix within the landscaped areas, are to be designed to be
kept short to maintain adequate drainage and to limit the development of faunal habitats.
Prohibitive dumping placards .
Trash and Debris: During each inspection and maintenance visit to the site, debris and trash
removal will be conducted to reduce the potential for inlet and outlet structures and other
components from becoming clogged and inoperable during storm events.
Sediment Removal: Sediment accumulation, as part of the operation and maintenance program
at of landscaped areas, will be monitored once a month during the dry season, after every large
storm (0.50 inch), and monthly during the wet season. Specifically, if sediment reaches a level
at or near plant height, or could interfere with flow or operation, the sediment will be
removed. If accumulation of debris or sediment is determined to be the cause of decline in
design performance, prompt action (i.e., within ten working days) will be taken to restore the
landscaped areas to design performance standards. Actions will include using additional fill
and vegetation and/or removing accumulated sediment to correct channeling or ponding.
Characterization and Appropriate disposal of sediment will comply with applicable local,
county, state, or federal requirements. The landscaped areas will be re-graded, if the flow
gradient has changed, and then replanted with sod.
Removal of Standing Water: Standing water must be removed if it contributes to the
development of aquatic plant communities or mosquito breeding areas.
Fertilization and Irrigation: The vegetation seed mix is to been designed so that fertilization
and irrigation is to be kept at a minimum.
3
• Elimination of Mosquito Breeding Habitats. The most effective mosquito control program is J
one that eliminates potential breeding habitats.
Corrective Maintenance
Corrective maintenance is required on an emergency or non-routine basis to correct problems and to
restore the intended operation and safe function of all landscaped areas.
Corrective maintenance activities include:
Removal of Debris and Sediment: Sediment, debris, and trash, which impede the hydraulic
functioning of landscaping and prevent vegetative growth, will be removed and properly disposed.
Temporary arrangements will be made for handling the sediments until a permanent arrangement is
made. Vegetation will be re-established after sediment removal.
Structural Repairs: Once deemed necessary, repairs to structural components of landscaping will be
done within 10 working days. Qualified individuals (i.e., the designers or contractors) will conduct
repairs where structural damage has occurred.
Embankment and Slope Repairs: Once deemed necessary, damage to the embankments and slopes of
landscaped areas will be repaired as soon as possible, and within IO working days maximum.
Erosion Repair: Where a reseeding program has been ineffective, or where other factors have created
erosive conditions (i.e., pedestrian traffic, concentrated flow, etc.), corrective steps will be taken to
prevent loss of soil and any subsequent danger to the performance and use of landscaped areas as
BMPs. There are a number of corrective actions than can be taken.
These include erosion control blankets, riprap, sodding, or reduced flow through the area. Designers
or contractors will be consulted to address erosion problems if the solution is not evident. J
Elimination of Animal Burrows
Animal burrows will be filled and steps taken to remove the animals if burrowing problems continue
to occur (filling and compacting). If the problem persists, vector control specialists will be consulted
regarding removal steps. This consulting is necessary as the threat of rabies in some areas may
necessitate the animals being destroyed rather than relocated. If the BMP performance is affected,
abatement will begin. Otherwise, abatement will be performed annually in September.
General Facility Maintenance: In addition to the above elements of corrective maintenance, general
corrective maintenance will address the overall facility and its associated components. If corrective
maintenance is being done to one component, other components will be inspected to see if
maintenance is needed.
Maintenance Frequency
The Inspection & Maintenance Schedule included in enclosed Attachment A 1 for all BMPs lists the
schedule of maintenance activities to be implemented.
Debris and Sediment Disposal
Waste generated onsite is ultimately the responsibility of the Owner. Disposal of sediments, debris,
and trash will comply with applicable local, county, state, and federal waste control programs.
Hazardous Waste
4
(
Suspected hazardous wastes will be analyzed to determine disposal options. Hazardous wastes
generated onsite will be handled and disposed of according to applicable local, state, and federal
regulations. A solid or liquid waste is considered a hazardous waste if it exceeds the criteria listed in
the CCR, Title 22, Article 11.
C. Irrigation System
Inspection Frequency and Procedure
The Irrigation system shall be checked each week as a minimum. The following items shall be
checked to insure that they are functioning properly:
• Shut-off devices
• Pressure drop sensors
• Moisture sensors
• All piping and sprinkler heads to insure there are no leaks and that proper water spread is
maintained.
• All flow reducers.
• Check for overspray/runoff
D. Roof Drains
All roof drains shall be inspected Prior to August 31 of each year to ensure that they are clean and free
from trash and in good repair. They shall be flushed and any leaks or damages piping shall be either
replaced or repaired. Where roof drains flow onto grass areas splash structures and or rock rip-rap
shall be maintained so the flow from the roof drains do not cause erosion or damage to the grass area.
During the rain season roof drains shall be inspected weekly and after each rain storm to insure that
there is no trash and or silt build up that will restrict the run-off flow from the roof. All trash and/or
silt build up shall be removed immediately.
• It is not permissible to directly connect roof drains into a drain system.
• Roof drain downspouts shall discharge runoff to a landscaped area, and to allow the runoff to
flow through landscape, prior to entering a private yard drain system.
E. Trash Storage Areas
All trash storage areas shall be inspected daily to insure that they are clean from trash. Also the
following shall be inspected annually before and after the rainy season (Oct. 1 to April 30).
• Pavement is in good repair.
• Drainage will not run-off onto adjacent areas.
• That they remain screened or walled to prevent off-site transport of trash.
• That all lids are closed and/or awnings are in good repair to minimize direct precipitation.
F. Storm Water Conveyance System Stenciling and Signing
5
■ Signage/stenciling are to be inspected for legibility and visual obstruction and shall be repaired J
and cleared of any obstruction within 5 working day of inspection.
■ Inspection Frequency: Semi-annually, and monthly during rainy season.
6
G. Structural BMP: Biofiltration
Vegetated Infiltration or Filtration BMP
Maintenance Indicators and Actions for Vegetated BMPs
Typical Maint~nance lndicator(s) Maintenance Actions for Vegetated BMPs
Accumulation of sediment, litter, or Remove and properly dispose of accumulated materials, without
debris damage to the vegetation.
Poor vegetation establishment Re-seed, re-plant, or re-establish vegetation per original plans.
Overgrown vegetation Mow or trim as appropriate, but not less than the design height of
the vegetation per original plans when applicable (e.g. a vegetated
swale may require a minimum vegetation height).
Erosion due to concentrated irrigation Repair/ re-seed/ re-plant eroded areas and adjust the irrigation
flow system.
Erosion due to concentrated storm Repair/ re-seed/ re-plant eroded areas, and make appropriate
water runoff flow corrective measures such as adding erosion control blankets,
adding stone at flow entry points, or minor re-grading to restore
proper drainage according to the original plan. If the issue is not
corrected by restoring the BMP to the original plan and grade,
The City must be contacted prior to any additional repairs or
reconstruction.
Standing water in vegetated swales Make appropriate corrective measures such as adjusting irrigation
system, removing obstructions of debris or invasive vegetation,
loosening or replacing top soil to allow for better infiltration, or
minor re-grading for proper drainage. If the issue is not corrected
by restoring the BMP to :11e original plan and grade, iCitv sta§
must be contacted prior to any additional repairs or
reconstruction.
Standing water 1n bioretention, Make appropriate corrective measures such as adjusting irrigation
biofiltration with partial retention, or system, removing obstructions of debris or invasive vegetation,
biofiltration areas, or flow-through clearing underdrains (where applicable), or repairing/ replacing
planter boxes for longer than 96 hours clogged or compacted soils.
following a storm event"'
Obstructed inlet or outlet structure Clear obstructions.
Damage to structural components such Repair or replace as applicable.
as weirs, inlet or outlet structures
"These BMPs typically include a surface ponding layer as part of their function which may take 96 hours to
drain following a storm event.
7
Inspection Frequency
The facility will be inspected and inspection visits will be completely documented:
■ Once a month at a minimum.
■ After every large storm (after every storm monitored or these storms with more than 0.50 inch of
precipitation.)
■ On a weekly basis during extended periods of wet weather.
Maintenance is needed if vegetation height is greater than 5" (height shall be kept between 2" and 5"); if
there is standing water; if debris are present or if sedimentation is occurring at the vegetation height;
ensure that all landscaped areas have minimum of 80% coverage and that no animal burrows are present.
Visual Inspection as part of landscape maintenance
• Inspect before and after the rainy season (Rainy season (Oct. I to April 30)).
H. Outlet Structures
All outlet structures shall be kept functional at all times. Routine inspection and corrective maintenance
shall include removal of trash sediment and debris and repair of any structural damage or clogging of
orifice outlets. The minimum maintenance frequency shall be Prior to August 31 each year, weekly
during rainy season or within 24 hours prior to rain forecasts.
I. Vector Control Owner Responsibilities
VECTOR MANAGEMET CONTROL REQUIREMENTS
Any method to limit or eradicate the mammals, birds, insects or other arthropods which transmit disease
pathogens. Management of mosquitoes and other vectors in stormwater management structures, such as
Bioretention Facilities and Best Management Practices, is critical for protecting public health.
In order to implement vector controls including minimizing the risk for mosquito-borne disease
transmission, It is the responsibility of the Owner to regularly maintain the outlet structures and monitor
the site after every storm event to ensure that the system (comprising of above and below ground storage
facilities) is dewatered in less than 72 hours. Otherwise the owner will be required to implement a vector
control plan in accordance with California Department of Public Health.
■ Maintain all drainage inlets and outlets trash free; remove silt; make sure to clear any standing
water after 72-hours of ponding.
Vector Control Resources:
l. F of San Diego vector educational brochures please reference the following website:
http://www.sdcounty.ca.gov/deh/pests/vector disease.html
2. Please contact the County of San Diego vector control program with specific questions or
concerns.
8
ATTACHMENT "Al"
INSPECTION & MAINTENANCE SCHEDULE
PREVENTATIVE MAINTENANCE AND ROUTINE INSPECTION
TYPE BMP Routine Action Maintenance Maintenance MAINTENANCE
Indicator Freauencv ACTIVITY
Landscaping & Proper irrigation Less than 80% Each year as Re-plant. Repair
irrigation & Fertilizer. coverage needed and once Irrigation system
during rainy season within 5-days.
(Oct. 1 to April 30)
Trash storage Trash free and Visual Daily inspection Remove trash and
areas removal of silt Inspection silt
Daily.
Roof drain Trash free and Silt build up of Each year routinely Remove all trash
removal of silt, more than 1" no as needed. and silt and repair
sedimentation & trash any damage to
Debris roof drains,
Bioretention -Trash free and Silt build up of Monthly during rainy Remove trash and
Biofiltration removal of silt. more than 2" no season, and silt -repair and
Facilities Clear Clogged trash, after Storm Event reseed exposed
outlets and Exposed soils, areas, maintain
Standing Water. dead grass height so as
vegetation, not be shorter
ponded water, than 2" or higher
and excessive than 5" remove all
vegetation ponded water
(see TC-30) weekly
inspections, (See
TC-30)
Storm Water Must be legible Fading of paint Semi-annually each Repaint stenciling
Conveyance at all times and or illegible year & monthly and/or replace
system have a clear letters or during rainy season signs
Stenciling & view.
Signing
Outlet Must be kept Silt, debris, Weekly during rainy Silt, debris, trash
Structures functional at all trash season or within 24 accumulation and
times. Clear accumulation, hours prior to rain repair any
Clogged outlets Ponding Water forecasts. structural damage
and Standing to the outlet
Water. structures.
9
SITE-SPECIFIC
REQUIREMENTS
All slopes and
landscaped areas
are to have a
minimum coverage
of 80%
All trash storage
areas to be free
from trash and silt at
all times
All Roof to be free
from trash and silt
and in good repair
All bio-filters to be
free from trash and
silt at all times,
grass area to be
free from exposed
soil and maintained
to proper height,
removal of any
ponding of water for
more than 72 hours.
Appies to all
stenciling and
signs
All outlet structures
shall be kept
functional at all
times.
ATTACHMENT "B1"
...,
Annual Estimate to Maintain all BMPs Annual 10-Year
Landscaping & Biofiltration
Maintenance of landscaping and bio-filters is already included in the
property management responsibilities. Additional cost: $400 $4,000
Irrigation System:
Inspection and maintenance of the irrigation system is already included
in the property management responsibilities, Additional cost: $100 $1,000
Roof Drains:
Roof drain inspection and maintenance is already included in the
property management responsibilities.
Training:
Once a year & training of new employees within their first
week of employment. $100 $1,000
Stormdrain Signage (As needed or every 2 years) $100 $1,000
:)
Trash Storage Areas:
Inspection of trash storage area & maintenance to those areas is already
included in the property management responsibilities. Additional cost: $50 $500
Total Estimated Annual Cost to Maintain BMPs $750 $7,500
10
ATTACHMENT "C1"
BMP TRAINING LOG
Personnel
Date Type of Training Trained Trainer
MO/Day/Yr
11
ATTACHMENT "D1"
INSPECTION AND MAINTENANCE LOG
Name of Date Repair made and
BMP TYP & DATE Person Description of BMP Condition/ Description repair
Description repair required if made and by
LOCATION M/D/Y Inspecting any whom
A
12
ATTACHMENT 3
ATTACHMENT 4
City standard Single Sheet BMP (SSBMP) Exhibit
[Use the City's standard Single Sheet BMP Plan.]
------
-----------------------------------------------------------------------------------------------------EX. 12" VPVC WATER EX. 12~ PVC WATER
--
---•s---
-----
-~ ✓~ ;:,
30 15 0 30 60 90
SCALE: 1 " -30'
PLANS PREPARED BY:
SPEAR & ASSOCIATES, INC.
CIVIL ENGINEERING & LAND SURVEYING
475 PRODUCTION STREET, SAN MARCOS, CA 92078
PHONE (760) 736-2040 FAX (760) 736-4866
WWW.SPEARINC.NET
--------------· -------------------
' EX. 16" CMLC WA"TER
WHIPTAIL LOOP
18 EX. 8" PV~ SEWER
* MINIMUM CURB DEPTH IS 12 INCHES; CURBS SHOULD BE
VERTICAL ELBOW DOWELED TWO FEET INTO ADJACENT PCC
PAVEMENT WITHIN 10 FEET OF THE 8/0RLTRATION BASIN. 3• HARDWOOD MULCH
"
'
EX. SMH ~
MAINTENANCE CLEAN-OUT
CATCH BASIN EMERGENCY OVERFLOW
STORM DRAIN STENCIL 50-13
3.oo'(MIN.} BENCH j
WHEN NEXT TO A SLOPE
~✓-'=-,1.,--------
:;,; c::, s;;,"= ~ c§
-ffl C,"' cl e:
-BASIN TOP (MIN.)
(TO REMAIN CLOSED AT ALL TIMES)
6" MIN. FROM F.S. OF BASIN
6" P.C.C. CURB PER SDRSD G-1
1% MIN-
TYPICAL DETAIL & OUTLET CONNECTlON
NOT-TO-SCALE
17 s s: I s
' >,t EX. 16~ CMLC WATER
EX. s; PVC SEWER s
COREDR/ll KEYHOLE TYPE OPENING
FOR MAINTENANCE PLATE REMOVAL
WITHOUT REMOVING THE BOLTS
-..i-½"x4" STAINLESS STEEL
WEDGE ANCHOR BOLT
12x12" PLATE ¾ • THICK GAL VAN/ZED
MAINTENANCE PLATE
/ ~ ---._, EPOXY SEAL TO CATCH
t;:;' BASIN INTERIOR WALL
( l., lg \_-+-6" DIA. PERFORATED
8 \ ~11 8 PVC UNDERDRAIN
, / CONNECTION
(EXTERIOR}
ORIFICE DRILLED THROUGH MAINTENANCE
PLATE @ UNDERDRAIN CONNECTION.
A= 1.68: B= 1.59"
MAINTENANCE PLATE DETAIL
ATTACH TO INTERIOR INLET WALL OF
36"x36" CATCH BASIN
DRAINAGE MANAGEMENT AREA BREAKDOWN
DRAINAGE AREA SURFACE SYMBOL DRAINAGE AREA JI' DRAINAGE AREA 'B' SELF MmGAT!NG
SOil TYPE
BUILDING ROOFTOP
PARKING/DRIVE AISLE
IMPERVIOUS AREA
HARSCAPING/SIOEWALK
LANDSCAPING
OMA SUB-AREA:
TOTAL SITE AREA:
~ 35,256 SQ FT
[. • ' ,, I 4,705 SQ FT
118,365 SQ FT
20,380 SQ FT 0 SQ FT
42,495 SQ FT 0 SQ FT
7,165 SQ FT 0 SQ FT
35,860 SQ FT 1,510 SQ FT
105,900 SQ FT 1,510 SQ FT
225,775 SQ FT
---------
LEGEND OF SYMBOLS ---------PROPERTY LINE
(
[II}-------
---
STREET CENTERLINE
EXISTING CONTOURS
DIRECTION OF DRAINAGE
DRAINAGE AREA
DRAINAGE MANAGEMENT AREA DESIGNA TIGN
LONGEST FLOW PATH
PROPOSED STURM DRAIN
8. CATCH BASIN (PVT>
PROJECT ADDRESS:
LOT J, WHIPTAIL LOOP
CARLSBAD, CA 92008
PROPERTY OWNER
CARLSBAD OAKS NORTH VENTURES LP.
ADDRESS: 3575 KENYON STREET, SUITE 200
SAN DIEGO, CA 92110
CONTACT: DEAN SMITH @TECH CONTRACTORS
PHONE NO: (619} 223-1663
I SH1EET I CITY OF CARLSBAD I SH1EETS I
::::::::=:=::::'...:::::=:::::E:::N:::G:::IN::::E=:E::::R:::IN:::G==:D:::E:::::P:::::AR::::T:::::M::::E:::N:::::T=--:=::.
POST DEVELOPMENT DMA PLAN FOR:
LOT 3, WHIPTAIL LOOP
CARLSBAD, CA 92008
DRAWING NO.
POST