HomeMy WebLinkAboutCDP 2018-0048; PRIORITY DEVELOPMENT PROJECT (PDP) STORM WATER MANAGEMENT PLAN (SWQMP); 2020-10-15CITY OF CARLSBAD
PRIORITY DEVELOPMENT PROJECT (PDP)
STORM WATER QUALITY MANAGEMENT PLAN (SWQMP)
FOR POINSETTIA COMMUNITY PARK
PHASE IV DOG PARK & PARKING LOT
CIP:
DWG: 525-IA
ENGINEER OF WORK:
SSI
71
FC
KENNETH T. KOZLIK, RCE 71883
PREPARED FOR:
CITY OF CARLSBAD PARKS AND RECREATION
799 PINE AVENUE, SUITE 200
CARLSBAD, CA 92008
760-434-2826
PREPARED BY:
FUSCOE ENGINEERING, INC.
6390 GREENWICH DRIVE, SUITE 170
SAN DIEGO, CA 92122
858-554-1500
DATE:
OCTOBER 15, 2020
TABLE OF CONTENTS
Certification Page
Project Vicinity Map
FORM E-34 Storm Water Standard Questionnaire
Site Information
FORM E-36 Standard Project Requirement Checklist
Summary of PDP Structural BMPs
Attachment 1: Backup for PDP Pollutant Control BMPs
Attachment la: DMA Exhibit
Attachment 1 b: Tabular Summary of DMAs and Design Capture Volume Calculations
Attachment Ic: Harvest and Use Feasibility Screening (when applicable)
Attachment id: Categorization of Infiltration Feasibility Condition (when applicable)
Attachment le: 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
CERTIFICATION PAGE
Project Name: Poinsettia Community Park Phase IV Dog Park & Parking Lot
Project ID: [Insert]
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. 1 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.
/
of Work's SiattJfe, PE-N-uml:Fe-r & Expiration Date
Kenneth T. Kozlik PE
Fuscoe Engineering, Inc.
Date I.In
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PROJECT VICINITY MAP
(¼City of STORM WATER STANDARDS Development Services
car1sbad QUESTIONNAIRE Land Development Engineering
1635 Faraday Avenue E-34 (760) 602-2750
www.carlsbadca.gov
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 final 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 required when multiple development applications for the same project are
submitted concurrently.
PROJECT INFORMATION
PROJECT NAME: Poinsettia Community Park Phase IV Dog Park & Parking Lot PROJECT ID:
ADDRESS: 6600 Hidden Valley Road APN: 214-140-13,
The project is.:check one): El New Cevelopment I1 Redevelopment
The total proposed disturbed area is:72,000 ft2 (1.65) acres
The total proposed newly created and/or replaced impervious area is:18,977 ft2 (0.43) 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 03/19
STEP I
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 El 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.
STEP 2
TO BE COMPLETED FOR ALL DEVELOPMENT PROJECTS
To determin'e 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:
YES NO
1. Constructing new or retrofitting paved sidewalks, bicycle lanes or trails that meet the following criteria:
Designed and constructed to direct storm water runoff to adjacent vegetated areas, or other non-
erodible permeable areas; OR El Designed and constructed to be hydraulically disconnected from paved streets or roads; OR
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 El 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? El
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.
E-34 Page 2 of 4 REV 03/19
STEP
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
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, U and public development projects on public or private land.
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 El more of impervious surface? This includes commercial, industrial, residential, mixed-use, and public
development projects on public or private land.
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 U
refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial
Classification (SIC) code 5812).
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 U
development project includes development on any natural slope that is twenty-five percent or greater.
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 U a land area or facility for the temporary parking or storage of motor vehicles used personally for
business or for commerce.
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 El site? A street, road, highway, freeway or driveway is any paved impervious surface used for the
transportation of automobiles, trucks, motorcycles, and other vehicles.
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 overland a distance of U
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).*
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 U 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.
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 (AD T) of 100 or more vehicles per day.
Is your project a new or redevelopment project that results in the disturbance of one or more acres of land El and are expected to generate pollutants post construction?
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 U
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 applicant information.
E-34 Page 3 of 4 REV 03/19
STEP 4
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) =+1- 200.000 sq. ft. El
Total proposed newly created or replaced impervious area (B) =18,977 sq.
ft. Percent impervious area created or replaced (B/A)*100 =9.5 %
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 BMP'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.
STEP 5
CHECK THE APPROPRIATE BOX AND COMPLETE APPLICANT INFORMATION
My project is a PDP and must comply with POP stormwater requirements of the BMP Manual. I understand I must
prepare a Storm Water Quality Management Plan (SWQMP) for submittal at time of application.
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:Kenneth T. Kozlik, Applicant Title: Civil Engineer
Applicant Date: 08/18/2020
nvironmentally Sensitive 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 Pla,; and any other equivalent environmentally sensitive areas which have been identified by the City.
This Box for City Use On/v
City Concurrence: YES NO
El El
By:
Date:
Project ID:
E-34 Page 4of4 REV 03/19
SITE INFORMATION CHECKLIST
PrójëiSUmmiry Information
Project Name Poinsettia Community Park Phase IV Dog Park &
Parking Lot
Project ID CD 2018-0048
Project Address 6600 Hidden Valley Road, Carlsbad, CA 92011
Assessor's Parcel Number(s) (APN(s)) 214-140-13,-23,&-39
Project Watershed (Hydrologic Unit) Carlsbad 904
Parcel Area
41.14 Acres (1,792,000 Square Feet)
Existing Impervious Area
(subset of Parcel Area) 4.59 Acres (+/-200,000 Square Feet)
Area to be disturbed by the project
(Project Area) 1.65 Acres (72,000 Square Feet)
Project Proposed Impervious Area
(subset of Project Area) 0.43 Acres (18,977 Square Feet)
Proct Proposed Pervious Area
(subset of Project Area) 1.22 Acres (53,023 Square Feet)
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):
IJ Existing developmen___________
J Previously graded but not built ou
E Agricultural or other non-impervious use
Vacant, undeveloped/natural
Description I Additional Information:
Existing Land Cover Includes (select all that apply):
13 Vegetative Cover___________
11 Non-Vegetated Pervious Area
Imp ervious Aread
Description I Additional Information:
Underlying Soil belongs to Hydrologic Soil Group (select all that apply):
LI N RCS Type A
LI NRCS Type B
LI NRCS Type C
LI INRCS Type
Approximate Depth to Groundwater (GW):
LI GW Depth < 5 feet
LI5 feet < GW Depth < 10 feet
LI 10 feet < GW Depth < 20 feet
LI 3W Depth > 20 fee
Existing Natural Hydrologic Features (select all that apply):
LI Watercourses
LI Seeps
LI Springs
Li Wetlands
iNcn
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]:
Phase IV of Poinsettia Community Park consists of two barrens but previously graded portions
of the Poinsettia Park. The Southern half (dog park) of the area in study currently drains from
the east to the west via surface drainage into an existing 24"x24" catch basin curb apron. The
northern portion (parking lot) is flat throughout and has minor surface drainage from the east to
the west. This area eventually drains to the said existing 24"x24" catch basin curb apron located
north west of the area in study. No offsite drainage is comingled with the area of study.
Description of Proposed Site Development and Drainage Patterns
Project Description / Proposed Land Use and/or Activities:
The study of area proposes to construct a dog park which entails mpervious surfaces and
grading of the southern portion. The northern portion is being proposed as a parking lot of
impervious surface.
List/describe proposed impervious features of the project (e.g., buildings, roadways, parking
lots, courtyards, athletic courts, other impervious features):
Roadways, parking, sidewalks.
List/describe proposed pervious features of the project (e.g., landscape areas):
Landscape areas
Does the project include grading and changes to site topography?
Ye
11 No
Description /Additional Information:
The dog park will retain the same drainage pattern but graded to flatten existing slopes and
utilize seat walls for major grade jumps. The parking lot will remain the same drainage pattern
but graded for impervious pavement.
Does the project include changes to site drainage (e.g., installation of new storm water
conveyance systems)?
Ye
11 No
Description / Additional Information:
The dog park will install 12"x12" catch basin and graded swale along the southwest perimeter of
the southern portion to capture all the site drainage. All onsite runoff will be conveyed to
proposed biofiltration (BFI) and connect via proposed 8" storm drain to existing inlet apron
located south west of the site. The parking lot will be constructed with valley gutters to capture
onsite drainage into proposed biofiltration (BF2). Once treated, this runoff will be conveyed via
new storm drain system into said north west inlet apron located north west of the site.
0
Identify whether any of the following features, activities, and/or pollutant source areas will be
present (select all that apply):
L1Jn-site storm drain inletd
Interior floor drains and elevator shaft sump pumps
II Interior parking garages
11 Need for future indoor & structural pest control
L!,,andscape/Outdoor Pesticide Us
ii Pools, spas, ponds, decorative fountains, and other water features
1 Food service
11 Refuse areas
El Industrial processes
11 Outdoor storage of equipment or materials
[]Vehicle and Equipment Cleaning
11 Vehicle/Equipment Repair and Maintenance
Ej Fuel. Dispensing Areas
Loading Docks
fl Fire Sprinkler Test Water
Miscellaneous Drain or Wash Water
El zas, sidewalks, and parkingjotg
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):
The storm drain systems for Poinsettia Park discharge to the canyon to the west. This canyon
hen flows north for about 0.4 miles to a confluence with Encina Creek. The creek then flows
about 0.8 miles west to discharge to 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
poll uta nt(s)/stresso r(s) causing impairment, and identify any TMDLs for the impaired water
bodies:
303(d) Impaired Water Body Pollutant(s)/Stressor(s) TMDLs
None
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):
Pollutant
Not Applicable to
the Project Site
Anticipated from the
Project Site
Also a Receiving
Water Pollutant of
Concern
Sediment
P
Nutrients
P
Heavy Metals
X
x
Organic Compounds
Trash _&_Debris
X
Oxygen Demanding
Substances
p
Oil _&_Grease
X
Bacteria & Viruses
P
Pesticides
P
Hydromodification Management Requirements
Do hydromodification management requirements apply (see Section 1.6 of the BMP Design
Manual)?
1 Yes, hydromodification management flow control structural BMPs requiredi
LI 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.
LI No, the project will discharge runoff directly to conveyance channels whose bed and bank
concrete-lined all the way from the point of discharge to water storage reservoirs, lakes,
enclosed embayments, or the Pacific Ocean.
LI 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 management requirements apply
Based on the maps provided within the WMAA, do potential critical coarse sediment yield areas
exist within the project drainage boundaries?
LI Yes
No critical coarse sediment yield areas to be protected based on WMAA map
If yes, have any of the optional analyses presented in Section 6.2 of the BMP Design Manual
been performed?
LI 6.2.1 Verification of Geomorphic Landscape Units (GLUs) Onsite
LI 6.2.2 Downstream Systems Sensitivity to Coarse Sediment
LI 6.2.3 Optional Additional Analysis of Potential Critical Coarse Sediment Yield Areas Onsite
LI 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?
LI No critical coarse sediment yield areas to be protected based on verification of GLUs onsite
LI Critical coarse sediment yield areas exist but additional analysis has determined that
protection is not required. Documentation attached in Attachment 8 of the SWQMP.
LI 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 Control for Post-Project Runoff*
*This Section only required if hvdrómodification manaaement reauirements aoDlv
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 located south west of Dog Park area and collect all proposed runoff within the dog park.
P00 2 located north west of the parking lot and collect all proposed runoff within parking lot
except De Minims Areas as shown on DMA/HMP Exhibit.
Has a geomorphic assessment been performed for the receiving channel(s)?
No, the low flow threshold is 0.1 Q2 (default low flow threshold)
EYes, the result is the low flow threshold is 0.1Q2
LI yes, the result is the low flow threshold is 0.3Q2 El 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.
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.
C"City 0f
Carlsbad
STANDARD PROJECT
REQUIREMENT
CHECKLIST
E-36
Development Services
Land Development Engineering
1635 Faraday Avenue
(760) 602-2750
www.carlsbadca.gov
- Project Information
Project Name: Poinsettia Community Park Phase IV Dog Park & Parking Lot
Project ID:
DWG No. or Building Permit No.: 525-1A
Source Control BMPs
All development projects must implement source control BMPs SC-1 through SC-6 where applicable and feasible. See
Chapter 4 and Appendix EA 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 EA 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 li Yes U No U N/A
Discussion/justification if SC-1 not implemented:
SC-2 Storm Drain Stenciling or Signage III Yes U No U N/A
Discussion/justification if SC-2 not implemented:
SC-3 Protect Outdoor Materials Storage Areas from Rainfall, Run-On Runoff, and Wind [E] Yes U No ii N/A Dispersal
Discussion/justification if SC-3 not implemented:
E-36 Page 1 of 4 Revised 09/16
Source Control Requirement (continued) Applied? - -
SC-4 Protect Materials Stored in Outdoor Work Areas from Rainfall, Run-On, Runoff, and
Wind Dispersal U Yes U No UI N/A
Discussion/justification if SC-4 not implemented:
SC-5 Protect Trash Storage Areas from Rainfall, Run-On, Runoff, and Wind Dispersal LI Yes U No UI 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 Appendix E.1 of BMP Manual for guidance).
UI On-site storm drain inlets U Yes U No U N/A
U Interior floor drains and elevator shaft sump pumps U Yes U No UI N/A
U Interior parking garages U Yes U No UI N/A
UI Need for future indoor & structural pest control UI Yes U No 0 N/A
UI Landscape/Outdoor Pesticide Use UI Yes 0 No U N/A
U Pools, spas, ponds, decorative fountains, and other water features U Yes U No UI N/A
U Food service 0 Yes U No UI N/A
0 Refuse areas U Yes 0 No UI N/A
U Industrial processes U Yes U No II N/A
U Outdoor storage of equipment or materials 0 Yes 0 No UI N/A
U Vehicle and Equipment Cleaning U Yes U No UI N/A
U Vehicle/Equipment Repair and Maintenance U Yes U No UI N/A
U Fuel Dispensing Areas U Yes U No UI N/A
U Loading Docks 0 Yes U No UI N/A
U Fire Sprinkler Test Water U Yes U No UI N/A
U Miscellaneous Drain or Wash Water U Yes U No UI N/A
UI Plazas, sidewalks, and parking lots UI Yes U No U N/A
For "Yes" answers, identify the additional BMP per Appendix El. Provide justification for "No" answers.
On-site storm drain inlets: Mark all inlets with the words "No Dumping! Flows to Bay" or similar.
Need for future indoor & structural pest control: Provide Integrated Pest Management information to
owners
Landscape/Outdoor Pesticide Use: Provide IPM information to owners
Plazas, sidewalks, and parking lots: Plazas, sidewalks, and parking lots shall be swept regularly to
prevent the accumulation of litter and debris. Debris from washing shall be collected to prevent entry
into the storm drain system.
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 Applied?
SD-11 Maintain Natural Drainage Pathways and Hydrologic Features U Yes I LI No I 0 N/A
Discussion/justification if SD-1 not implemented:
SD-2 Conserve Natural Areas, Soils, and Vegetation I Eli Yes U No U N/A
Discussion/justification if SD-2 not implemented:
SD-3 Minimize Impervious Area I Eli Yes I 0 No LI N/A
Discussion/justification if SD-3 not implemented:
SD-4 Minimize Soil Compaction I Eli Yes U No I U N/A
Discussion/justification if SD-4 not implemented:
SD-5 Impervious Area Dispersion Ill Yes I U No I 0 N/A
Discussion/justification if SD-5 not implemented:
E-36 Page 3 of 4 Revised 09/16
Site Design Requirement (continued) J Applied?
SD-6 Runoff Collection N Yes El No 0 N/A
Discussion/justification if SD-6 not implemented:
SD-7 Landscaping with Native or Drought Tolerant Species I ii Yes I 0 No I 0 N/A
Discussion/justification if SD-7 not implemented:
SD-8 Harvesting and Using Precipitation 0 Yes M No I 0 N/A
Discussion/justification if SD-8 not implemented:
Harvest and Use infeasible per Form 1-7
E-36 Page 4 of 4 Revised 09/16
SUMMARY OF PDP STRUCTURAL BMPS
PDP Structural BMPs
All POPs must implement structural BMPs for storm water pollutant control (see Chapter 5 of
the BMP Design Manual). Selection of PDP structural BMPs for storm water pollutant control
must be based on the selection process described in Chapter 5. PDPs subject to
hydromodification management requirements must also implement structural BMPs for flow
control for hydromodification management (see Chapter 6 of the BMP Design Manual). Both
storm water pollutant control and flow control for hydromodification management can be
achieved within the same structural BMP(s).
PDP structural BMPs must be verified by the City at the completion of construction. This may
include requiring the project owner or project owner's representative to certify construction of
the structural BMPs (see Section 1.12 of the BMP Design Manual). PDP structural BMPs must
be maintained into perpetuity, and the City must confirm the maintenance (see Section 7 of the
BMP Design Manual).
Use this form to provide narrative description of the general strategy for structural BMP
implementation at the project site in the box below. Then complete the PDP structural BMP
summary information sheet for each structural BMP within the project (copy the BMP summary
information page as many times as needed to provide summary information for each individual
structural BMP).
Describe the general strategy for structural BMP implementation at the site. This information
must describe how the steps for selecting and designing storm water pollutant control BMPs
presented in Section 5.1 of the BMP Design Manual were followed, and the results (type of
BMPs selected). For projects requiring hydromodification flow control BMPs, indicate whether
pollutant control and flow control BMPs are integrated together or separate.
The Poinsettia Community Park project proposes to utilize standard biofiltration to provide both
polutant control and flow control. Harvest and reuse of storm water is considered infeasible due to
he lack of indoor demand, and the infeasibility of modifying the existing irrigation system to
integrate storm water reuse. Retention by infiltration or bioretention is considered infeasible
downstream of the existing dual culvert systems due to the low percolation rates (400 mm/in).
[Continue on next page as necessary.]
[Continued from previous page - This page is reserved for continuation of description of general
strategy for structural BMP implementation at the site.]
Structural BMP Summary Information
[Copy this page as needed to provide information for each individual proposed
structural BMP]
Structural BMP ID No. BF1
DWG525-lA Sheet No. 4
Type of structural BMP:
Retention by harvest and use (HU-l)
E Retention by infiltration basin (INF-l)
L Retention by bioretention (INF-2)
D Retention by permeable pavement (INF-3)
u Partial retention by biofiltration with partial retention (PR-1)
LiBiofiltration(jj
Flow-thru treatment control included as pre-treatment/forebay for an onsite retention a
biofiltration BMP (provide BMP type/description and indicate which onsite retention or
biofiltration BMP it serves in discussion section below)
11 Detention pond or vault for hydromodification management
D Other (describe in discussion section below)
Purpose:
fl Pollutant control only
Hydromodification control only
11 Combined pollutant control and hydromodification control
E Pre-treatment/forebay for another structural BMP
LI 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. BF2
DWG525-iA Sheet No. 5
Type of structural BMP:
Retention by harvest and use (HU-1)
Retention by infiltratiCn basin (lNF-l)
D Retention by bioretention (INF-2)
11 Retention by permeable pavement (lNF-3)
Partial retention by biofiltration with partial retention (PR-1)
Biofiltration BF-i
Flow-thru treatment control included as pre-treatment/forebay for an onsite retention cr
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
1 Hydromodification control only
F—C6-m--bined pollutant control and hydromodification contr1
Pre-treatment/forebay for another structural BMP
Other (describe in discussion section below)
Discussion (as needed):
ATTACHMENT I
BACKUP FOR PDP POLLUTANT CONTROL BMPS
This is the cover sheet for Attachment I.
Check which Items are Included behind this cover sheet:
Attachment Contents Checklist
Sequence
Attachment la DMA Exhibit (Required) h Included (Combined with I___I'H _
ydromodification Managementl
See DMA Exhibit Checklist on the back LExhibit) Attachment 2a'—
of this Attachment cover sheet.
(24"x36" Exhibit typically required)
Attachment lb Tabular Summary of DMAs Showing Included- on biAbif3
DMA ID matching DMA Exhibit, DMA Attachment l aF—
Area, and DMA Type (Required)* Included as Attachment lL
separate from DMA Exhibit *Prov de table in this Attachment OR
on DMA Exhibit in Attachment la
Attachment Ic Form 1-7, Harvest and Use Feasibility Included
Screening Checklist (Required unless Not included because the entire
the entire project will use infiltration project will use infiltration BMPs
BM Ps)
Refer to Appendix 13.3-11 of the BMP
Design Manual to complete Form 1-7.
Attachment id Form 1-8, Categorization of Infiltration I1IncIude
Feasibility Condition (Required unless LI Not included because the entire
the project will use harvest and use project will use harvest and use
BMPs" BMPs
Refer to Appendices C and D of the
BMP Design Manual to complete Form
1-8.
Attachment le Pollutant Control BMP Design LncIuded,
Worksheets I Calculations (Required)
Refer :o Appendices B and E of the
BMP Design Manual for structural
pollutant control BMP design
guidelines
Use this checklist to ensure the required information has been included on the DMA
Exhibit:
The DMA Exhibit must identify:
Underlying hydrologic soil group
Approximate depth to groundwater
Existing natural hydrologic features (watercourses, seeps, springs, wetlands)
ri Critical coarse sediment yield areas to be protected (if present)
Existing topography and impervious areas
11 Existing and proposed site drainage network and connections to drainage offsite
El Proposed grading
Proposed impervious features
Proposed design features and surface treatments used to minimize imperviousness
Drainage management area (DMA) boundaries, DMA ID numbers, and DMA areas (square
footage or acreage), and DMA type (i.e., drains to BMP, self-retaining, or self-mitigating)
fl Structural BMPs (identify location'and type of BMP)
Use this checklist to ensure the required information has been included on the
Hydromodification Management Exhibit:
The Hydromodification Management Exhibit must identify:
LI Underlying hydrologic soil group
LI Approximate depth to groundwater
Existing natural hydrologic features (watercourses, seeps, springs, wetlands)
LI Critical coarse sediment yield areas to be protected (if present)
LI Existing topography
LI Existing and proposed site drainage network and connections to drainage offsite
LI Proposed grading
LI Proposed impervious features
LI Proposed design features and surface treatments used to minimize imperviousness
LI Point(s) of Compliance (POC) for Hydromodification Management
LI Existing and proposed drainage boundary and drainage area to each POC (when necessary,
create separate exhibits for pre-development and post-project conditions)
LI Structural BMPs for hydromodification management (identify location, type of BMP, and
size/detail)
LEGEND SITE DATA
SPOT
Eo
[lE0000TI _lLi&i5
IF- ololl-l-
Ioor If
*
/Li,_JiHIHT lLOl - -----
NIT" PARK
ISSPSSPPOS (SO) 555(5005 (SO) 000
5))
O00POO 1. IL 11A 11 _ess J
...........................................
Appendix I: Forms and Checklists
Harvest and
I. Is there a demand for harvested water (check all that apply) at the project site that is reliably present during
the wet season?
Toilet and urinal flushing
O Landscape irrigation - Tjc.t tgjTD 3IZt-r tPavr I) ItlC of k1#r1t
Other:__________ wiv VIAXT104 çtiø& ro(Z-:Zr- 1i
-rai4NcA4- L*
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.
[Provide a summary of calculations here]
Calculate the DCV using worksheet B-2.1.
DCV = __________ (cubic feet)
3a. Is the 36 hour demand greater 3b. Is the 36 hour demand greater than 3c. Is the 36 hour demand
than or equal to the DCV? 0.25DCV but less than the full DCV? less than 0.25DCV?
D Yes / 0 No 0 Yes / 0 No 0 ye
Harvest and use appears to be Harvest and use may be feasible. Harvest and use is
feasible Conduct more detailed Conduct more detailed evaluation and considered to be infeasible.
evaluation and sizing calculations sizing calculations to determine
to confirm that DCV can be used feasibility. Harvest and use may only be
at an adequate rate to meet able to be used for a portion of the Site,
drawdown criteria, or (optionally) the storage may need to be
upsized to meet long term capture targets
while draining in longer than 36 hours.
Is harvest and use feasible based on further evaluation?
Yes, refer to Appendix E to select and size harvest and use BMPs.
No, select alternate BMPs.
1-26 June 2015
Appendix I: Forms and Checklists
I
Part I - 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 Yes No
Is the estimated reliable infiltration rate below proposed facility
1 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:
4Lf-T7OJ 164i- *JMZ.. T4 ti 1t'o 34
AVE. *0 MIdI,i a- 1i
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability.
Can infiltration greater than 0.5 inches per hour be allowed
without increasing risk of geotechnical hazards (slope stability,
2 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:
€E
Summarize findings of studies; provide reference to studies, calculations, snaps, data sources, etc Provide narrative
discussion of study/data source applicability.
1-27 June 2015
Appendix 1; Forms and Checklists
-I Criteria
--
Screening Question Yes No
-
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:
Summanié Endings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability.
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 1K
Screening Question shall be based on a comprehensive evaluation of
the factors presented in Appendix C.3.
Provide basis:
Summarize Endings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability.
If all answers to ro's 1 - 4 are "Yes" a full infiltration design is potentially feasible. The
Pan I feasibility screening category is Full Infiltration
Result ... 1-4 is 'No , infiltration may be possible to some extent but
easible or desirable to achieve a "full infiltration" design. j
=~Pl=ft
_ io be completed using gathered site mtotmatlon and best protesslonal Judgment considering the debniüon of MEP in
the MS4 Permit. Additional testing and/or studies may be required by Agency/Jurisdictions to substantiate findings
1-28 June 2015
Appendix I: Forms and Checklists
Part 2— Partial Infiltration vs. No Infiltration Feasibility Screening Criteria
Would infiltration of water in any appreciable amount be physically feasible without any negative
consequences that cannot be reasonably mitigated?
Criteria Screening Question Yes No
Do soil and geologic conditions allow for infiltration in any
D 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 Appendix D.
Provide basis:
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.
Can Infiltration in any appreciable quantity be allowed -without
increasing risk of geotechnical hazards (slope stability,
6 groundwater mounding, utilities, or other factors) that cannot
be mitigated to an acceptable 1ev-el? The response to this Screening
Question shall be based on a comprehensive evaluation of the factors
presented in Appendix C.2.
Provide basis
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.
1-29 June 2015
Appendix It Forms and Checklists
Criteria Screening Question Yes No
Can Infiltration in any appreciable quantity be allowed without
posing significant risk for groundwater related concerns
7 (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:
Summarize flndings 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.
Can infiltration be allowed without violating downstream water
8 sights? The response to this Screening Question shall be based on a K
comprehensive evaluation of the factors presented in Appendix C.3.
Provide basis:
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 inkration rates.
If all answers from ro~14 ~yespthen partial~infilt
'
riti~o-design easible.
T" 2 tial Infil ____
Result* 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.
To be completed using gathered site information and best professional judgment considering the definition of ME? in
the MS4 Permit Additional testing and/or studies may be required by Agency/Jurisdictions to substantiate findings
1-30 June 2015
........................................... BMP Sizing Spreadsheet V3.0
Project Name: Poinsettia Dog Park Hydrologic Unit: Carlsbad
Project Applicant: City of Carlsbad Rain Gauge: Oceanside
Jurisdiction: City of Carlsbad Total Project Area: 0
Parcel (APN(: 214-140-13 Low Flow Threshold: 0.102
BMP Name: BP1 BMP Type: Blulllt,atlor,
BMP Native Soil Type: D BMP Infiltration Rate (In/hr): 0.025
Areas Draining to BMP HMP Sizing Factors Minimum BMP Size
DMA
Name Area (sf)
Pre Project Soil
Type Pre-Project Slope
Post Project
Surface Type
Area Weighted Runoff
Factor
(Table 0.2-1)'
Surface Area Surface Area (SF)
Impervious 3,817 D Moderate Concrete 1.0 0.07 267
Pervious 44,586 D Moderate Landscape 0.1 0.07 312
0
BMP Tributary Area 48,403
Surface Pvndirig Depth
Bioretention Soil Media Depth
Filter Coarse
Gravel Storage Layer Depth
Underdrain Offset
Minimum BMP Size 5/9
Proposed BMP Size* 600
10.00 in
18.00 in
5.00 in
12 lin
3.0 lin
Assumes standard configuration
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 Mam
Describe the BMP's in sufficient detail in your PDP SWOMP 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.
Uesignated Staff have Sinai 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: Poinsettia Dog Park Hydrologic Unit: Carlsbad
Project Applicant: City of Carlsbad Rain Gauge: Oceanside
Jurisdiction: City of Carlsbad Total Project Area: 0 - 0.102 Parcel (APN): 214440-1 Low Flow Threshold:
BMP Name BFI jBMP Type: Biofiltration
DMA
Name
Rain Gauge Pre-developed Condition Unit Runoff Ratio
(cfs/ac)
DMA Area (ac) Orifice Flow - Q2
(cfs)
Orifice Area
(in 2) Soil Type Slope
Impervious Oceanside D Moderate 0.575 0.088 0.005 0.07
Pervious Oceanside D Moderate 0.575 1.024 0.059 0.86
3.58 0.064 0.93 1.09
Max Tot. Allowable Max Tot. Allowable Max Orifice Max Orifice Head Orifice Flow Orifice Area Diameter
(feet) (cfs) (in') (in)
0.051 0.054 0.79 1.000
Average outflow during Max Orifice Outflow Actual Orifice Area Selected
surface drawdown Orifice Diameter
(cfs) (cfs) (in ') (in)
Drawdown (Hrs) 2.7
BMP Sizing Spreadsheet V3.0
Project Name: Poinsettia Dog Park Hydrologic Unit: Carlsbad
Project Applicant: City of Carlsbad Rain Gauge: Oceanside
Jurisdiction: City of Carlsbad Total Project Area: 0
Parcel (APN): 214-140-13 Low Flow Threshold: 0.102
BMP Name: 8P2 - BMP Type: - - -Bjofiltratinn
IMP Native Soil Typn. U BMP Infiltration Rate (in/hr): 0.025
Areas Draining to BMP HMP Sizing Factors Minimum BMP Size
DMA
Name Area (sf)
Pre Project Soil
Type Pre-Project Slope
Post Project
Surface Type
Area Weighted KueOtt
Factor
(Table 0,2.1(r
Surface Area Surface Area (SF)
Parking Lot 11,329 D Moderate Concrete 1.0 0.07 793
Pervious 8,443 D Moderate Landscape 0.1 0.07 59
Restroom Building 716 D Moderate Roofs 1.0 0.07 50
Walkway 2,668 D Moderate Roofs 1.0 0.07 187
Driveway 447 D Moderate Roofs 1.0 0.07 31
0
0
0
0
0
0
BMP Tributary Area 23,603 .
Surface Pending Depth
Bioretention Soil Media Depth
Filter Coarse
Gravel Storage Layer Depth
Underdrain Offset
Minimum BMP Size 1120
Proposed BMP Size* 1120
12.00 in
18.00 in
6.00 in
12 in
3.0 in
Assumes standard configuration
Notes:
1. Runoff factors which are used for hydrorraodification 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 Man
Describe the BMP's insufficient detail in your PDP SWQMP to demonstrate the area, volume, and other criteria can be met within the constraints of the site.
BMPs 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: Poinsettia Dog Park Hydrologic Unit: Carlsbad
Project Applicant: City of Carlsbad Rain Gauge: Oceanside
Jurisdiction: City of Carlsbad Total Project Area: 0
Parcel (APN): 214-140-13 Low Flow Threshold: 0.102
BMP Name BF2 BMP Type: Biofiltration
DMA
Name
Rain Gauge Pre-developed Condition Unit Runoff Ratio
(cfs/ac)
DMA Area (ac) Orifice Flow -
(cfs)
Orifice Area
(in 2) Soil Type Slope
Parking Lot Oceanside D Moderate 0.575 0.260 0.015 0.21
Pervious Oceanside D Moderate 0.575 0.194 0.011 0.16
Restroom Building Oceanside D Moderate 0.575 0.016 0.001 0.01
Walkway Oceanside D Moderate - - Moderate
0.575 0.061 0.004 0.05
Driveway Oceanside 0 0.575 0.010 0.001 0.01
3.75 0.031 0.44 0.75
Max Tot. Allowable Max Tot. Allowable Max Orifice Max Orifice Head Orifice Flow Orifice Area Diameter
(feet) (cfs) (in') (in)
0.018 0.020 0.28 0.600
Average outflow during Selected Max Orifice Outflow Actual Orifice Area surface drawdown Orifice Diameter
(cfs) (cfs) 2 (in ) (in)
Drawdown (Hrs) 16.8
ATTACHMENT 2
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 Udornbined with DMA Exhibli]
Exhibit (Required) kttachment 1 a)
Attachment 2b Management of Critical Coarse , Exhibit showing project drainageJ
Sediment Yield Areas (WMAA Exhibit poundaries marked on WMAAL
is required, additional analyses are Critical Coarse Sediment Yield]
optional) Area Map
See Section 6.2 of the BMP Design Optional analyses for Critical Coarse
Manual. Sediment Yield Area Determination
L 6.2.1 Verification of Geomorphic
Landscape Units Onsite
16.2.2 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 LL performed]
Channels (Optional) D Included
See Section 6.3.4 of the BMP Design
Manual.
Attachment 2d Flow Control Facility Design and L Included See Attachment 1
Structural BMP Drawdown
Calculations (Required)
See Chapter 6 and Appendix G of the
BMP Design Manual
ATTACHMENT 2b
WMAA Map with Potential Critical Coarse Sediment Areas
and Project Boundary
ATTACHMENT 3
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:
1 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:
1 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)
E How to access the structural BMP(s) to inspect and perform maintenance
U 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)
U Manufacturer and part number for proprietary parts of structural BMP(s) when
applicable
iii 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.)
U Recommended equipment to perform maintenance
U When applicable, necessary special training or certification requirements for
inspection and maintenance personnel such as confined space entry or
hazardous waste management
BF-1
Biofiltration
BMP MAINTENANCE FACT SHEET
FOR
STRUCTURAL BMP BF-1 BIOFILTRATION
Biofiltration facilities are vegetated surface water systems that filter water through vegetation, and soil or
engineered media prior to discharge via underdrain or overflow to the downstream conveyance system.
Biofiltration facilities have limited or no infiltration. They are typically designed to provide enough hydraulic head
to move flows through the underdrain connection to the storm drain system. Typical biofiltration components
include:
Inflow distribution mechanisms (e.g., perimeter flow spreader or filter strips)
Energy dissipation mechanism for concentrated inflows (e.g., splash blocks or riprap)
Shallow surface ponding for captured flows
Side slope and basin bottom vegetation selected based on climate and ponding depth
Non-floating mulch layer
Media layer (planting mix or engineered media) capable of supporting vegetation growth
Filter course layer consisting of aggregate to prevent the migration of fines into uncompacted native soils
or the aggregate storage layer
Aggregate storage layer with underdrain(s)
Impermeable liner or uncompacted native soils at the bottom of the facility
Overflow structure
Normal Expected Maintenance
Biofiltration requires routine maintenance to: remove accumulated materials such as sediment, trash or debris;
maintain vegetation health; maintain infiltration capacity of the media layer; replenish mulch; and maintain
integrity of side slopes, inlets, energy dissipators, and outlets. A summary table of standard inspection and
maintenance indicators is provided within this Fact Sheet.
Non-Standard Maintenance or BMP Failure
If any of the following scenarkos are observed, the BMP is not performing as intended to protect downstream
waterways from pollution and/or erosion. Corrective maintenance, increased inspection and maintenance, BMP
replacement, or a different BMP type will be required.
The BMP is not drained between storm events. Surface ponding longer than approximately 24 hours
following a storm event may be detrimental to vegetation health, and surface ponding longer than
approximately 96 hours following a storm event poses a risk of vector (mosquito) breeding. Poor drainage
can result from clogging of the media layer, filter course, aggregate storage layer, underdrain, or outlet
structure. The specific cause of the drainage issue must be determined and corrected.
Sediment, trash, or debris accumulation greater than 25% of the surface ponding volume within one
month. This means the load from the tributary drainage area is too high, reducing BMP function or
clogging the BMP. This would require pretreatment measures within the tributary area draining to the
BMP to intercept the materials. Pretreatment components, especially for sediment, will extend the life of
components that are more expensive to replace such as media, filter course, and aggregate layers.
Erosion due to concentrated storm water runoff flow that is not readily corrected by 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 Engineer] shall be contacted prior to any additional repairs or reconstruction.
BF-1 Page 1 of 11
January 12, 2017
BF-1
Biofiltration
Other Special Considerations
Biofiltration is a vegetated structural BMP. Vegetated structural BMPs that are constructed in the vicinity of, or
connected to, an existing jurisdictional water or wetland could inadvertently result in creation of expanded waters
or wetlands. As such, vegetated structural BMPs have the potential to come under the jurisdiction of the United
States Army Corps of Engineers, SDRWQCB, California Department of Fish and Wildlife, or the United States Fish
and Wildlife Service. This could result in the need for specific resource agency permits and costly mitigation to
perform maintenance of the structural BMP. Along with proper placement of a structural BMP, routine
maintenance is key to preventing this scenario.
BF-1 Page 2 of 11
January 12, 2017
........................................... BF-1
Biofiltration
SUMMARY OF STANDARD INSPECTION AND MAINTENANCE FOR BF-1 BIOFILTRATION
The property owner is responsible to ensure inspection, operation and maintenance of permanent BMPs on their property unless responsibility has been formally transferred to
an agency, community facilities district, homeowners association, property owners association, or other special district.
Maintenance frequencies listed in this table are average/typical frequencies. Actual maintenance needs are site-specific, and maintenance may be required more frequently.
Maintenance must be performed whenever needed, based on maintenance indicators presented in this table. The BMP owner is responsible for conducting regular inspections
to see when maintenance is needed based on the maintenance indicators. During the first year of operation of a structural BMP, inspection is recommended at least once prior
to August 31 and then monthly from September through May. Inspection during a storm event is also recommended. After the initial period of frequent inspections, the
minimum inspection and maintenance frequency can be determined based on the results of the first year inspections. -
Threshold/Indicator Maintenance Action Typical Maintenance Frequency
Accumulation of sediment, litter, or debris Remove and properly dispose of accumulated materials, Inspect monthly. If the BMP is 25% full* or more in
without damage to the vegetation or compaction of the one month, increase inspection frequency to monthly
media layer. plus after every 0.1-inch or larger storm event.
Remove any accumulated materials found at each
inspection.
Obstructed inlet or outlet structure Clear blockage. Inspect monthly and after every 0.5-inch or larger
storm event.
Remove any accumulated materials found at each
inspection.
Damage to structural components such as weirs, inlet or Repair or replace as applicable Inspect annually.
outlet structures Maintenance when needed.
Poor vegetation establishment Re-seed, re-plant, or re-establish vegetation per original Inspect monthly.
plans. Maintenance when needed.
Dead or diseased vegetation Remove dead or diseased vegetation, re-seed, re-plant, Inspect monthly.
or re-establish vegetation per original plans. Maintenance when needed.
Overgrown vegetation Mow or trim as appropriate. Inspect monthly.
Maintenance when needed.
2/3 of mulch has decomposed, or mulch has been Remove decomposed fraction and top off with fresh Inspect monthly.
removed mulch to a total depth of 3 inches. Replenish mulch annually, or more frequently when
needed based on inspection.
"25% full" is defined as Y. of the depth from the design bottom elevation to the crest of the outflow structure (e.g., it the height to the outflow opening is 12 Inches from the
bottom elevation, then the materials must be removed when there is 3 inches of accumulation - this should be marked on the outflow structure).
BF-1 Page 3 of 11
January 12, 2017
BF-1
Biofiltration
SUMMARY OF STANDARD INSPECTION AND MAINTENANCE FOR BF-1 BIOFILTRATION (Continued from previous page)
Threshold/Indicator Maintenance Action Typical Maintenance Frequency
Erosion due to concentrated irrigation flow Repair/re-seed/re-plant eroded areas and adjust the Inspect monthly.
irrigation system. Maintenance when needed.
Erosion due to concentrated storm water runoff flow Repair/re-seed/re-plant eroded areas, and make Inspect after every 0.5-inch or larger storm event. If
appropriate corrective measures such as adding erosion erosion due to storm water flow has been observed,
control blankets, adding stone at flow entry points, or increase inspection frequency to after every 0.1-inch
minor re-grading to restore proper drainage according or larger storm event.
to the original plan. If the issue is not corrected by Maintenance when needed. If the issue is not
restoring the BMP to the original plan and grade, the corrected by restoring the BMP to the original plan
[City Engineer] shall be contacted prior to any additional and grade, the [City Engineer] shall be contacted prior
repairs or reconstruction, to any additional repairs or reconstruction.
Standing water in BMP for longer than 24 hours Make appropriate corrective measures such as adjusting Inspect monthly and after every 0.5-inch or larger
following a storm event irrigation system, removing obstructions of debris or storm event. If standing water is observed, increase
invasive vegetation, clearing underdrains, or inspection frequency to after every 0.1-inch or larger Surface ponding longer than approximately 24 hours repairing/replacing clogged or compacted soils, storm event. following a storm event may be detrimental to Maintenance when needed. vegetation health
Presence of mosquitos/larvae If mosquitos/larvae are observed: first, immediately Inspect monthly and after every 0.5-inch or larger
remove any standing water by dispersing to nearby storm event. If mosquitos are observed, increase
For images of egg rafts, larva, pupa, and adult landscaping; second, make corrective measures as inspection frequency to after every 0.1-inch or larger
mosquitos, see applicable to restore BMP drainage to prevent standing storm event.
http://www.mosouito.org/biology water. Maintenance when needed.
If mosquitos persist following corrective measures to
remove standing water, or if the BMP design does not
meet the 96-hour drawdown criteria due to release
rates controlled by an orifice installed on the
underdrain, the [City Engineer] shall be contacted to
determine a solution. A different BMP type, or a Vector
Management Plan prepared with concurrence from the -
County of San Diego Department of Environmental
Health, may be required.
Underdrain clogged Clear blockage. Inspect if standing water is observed for longer than
24-96 hours following a storm event.
Maintenance when needed.
BF-1 Page 4 of ii
January 12, 2017
........................................... BF-1
Biofiltration
References
American Mosquito Control Association.
http://www.mosguito.org/
California Storm Water Quality Association (CASQA). 2003. Municipal BMP Handbook.
https://www.casga.org/resou rces/bmp-handbooks/municipal-bmp-handbook
County of San Diego. 2014. Low Impact Development Handbook.
http://www.sandiegocounty.gov/content/sdc/dpw/watersheds/susmp/lid.html
San Diego County Copermittees. 2016. Model BMP Design Manual, Appendix E, Fact Sheet BF-1.
http://www.projectcleanwater.org/index.php?option=com content&view=article&id=250<emid=220
BF-1 Page 5 of ii
January 12, 2017
BF-1
Biofiltration
Page Intentionally Blank for Double-Sided Piiniiug
BF-1 Page 6 of 11
January 12, 2017
BF-1
Biofiltration
Date: Inspector: j 13MP IL) No.:
Permit No.: APN(s):
Property / Development Name: Responsible Party Name and Phone Number: -
Property Address of BMP: Responsible Party Address:
INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 1 of 5
Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted
Accumulation of sediment, litter, or debris E Remove and properly dispose of
Maintenance Needed? accumulated materials, without damage
to the vegetation
EYES D If sediment, litter, or debris accumulation ENO exceeds 25% of the surface ponding E N/A volume within one month (25% full*),
add a forebay or other pre-treatment
measures within the tributary area
draining to the BMP to intercept the
materials.
E Other/ Comments:
Poor vegetation establishment LI Re-seed, re-plant, or re-establish
Maintenance Needed? vegetation per original plans
LI YES LI Other / Comments:
El NO
0 N/A
*25% full" is defined as % of the depth from the design bottom elevation to the crest of the outflow structure (e.g., if the height to the outflow opening is 12 inches from the
bottom elevation, then the materials must be removed when there is 3 inches of accumulation - this should be marked on the outflow structure).
BF-1 Page 7 of 11
January 12, 2017
..............,............................ BF-1
Biofiltration
Date: Inspector: I BMP ID No.:
Permit No.: APN(s):
INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 2 of 5
Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted
Dead or diseased vegetation 0 Remove dead or diseased vegetation, re-
Maintenance Needed? seed, re-plant, or re-establish vegetation
per original plans
Q YES D Other / Comments: 1:1 NO
El N/A
Overgrown vegetation El Mow or trim as appropriate
Maintenance Needed? D Other / Comments:
U YES
U NO
U N/A
2/3 of mulch has decomposed, or mulch has U Remove decomposed fraction and top off
been removed with fresh mulch to a total depth of 3
Maintenance Needed? inches
U YES U Other / Comments:
U NO
U N/A
BF-1 Page 8 of 11
January 12, 2017
0000000000000000000000000000000060000000000
BF-1
Biofiltration
Date: - Inspector: BMP ID No.:
Permit No.: APN(s):
INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 3 of 5
Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted
Erosion due to concentrated irrigation flow El Repair/re-seed/re-plant eroded areas and
Maintenance Needed? adjust the irrigation system
U YES U Other / Comments:
U NO
El N/A
Erosion due to concentrated storm water runoff El Repair/re-seed/re-plant eroded areas,
flow and make appropriate corrective
Maintenance Needed? measures such as adding erosion
control blankets, adding stone at flow
U YES entry points, or minor re-grading to
U NO restore proper drainage according to
U N/A the original plan
U If the issue is not corrected by restoring
the BMP to the original plan and grade,
the [City Engineer] shall be contacted
prior to any additional repairs or
reconstruction
U Other / Comments:
BF-1 Page 9 of 11
January 12, 2017
........................................... BF-1
Biofiltration
Date: Inspector: - -. BMP ID NO.:
Permit No.: APN(s):
INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 4 of 5
Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted
Obstructed inlet or outlet structure E Clear blockage
Maintenance Needed? E Other/ Comments:
El YES - -
E NO
E N/A
Underdrain clogged (inspect underdrain if E Clear blockage
standing water is observed for longer than 24-96
hours following a storm event) E Other/ Comments:
Maintenance Needed?
EYES
E NO
D N/A
Damage to structural components such as weirs, E Repair or replace as applicable
inlet or outlet structures
E Other / Comments:
Maintenance Needed?
D YES
D NO
El N/A
BF-1 Page 10 of 11
January 12, 2017
BF-1
Biofiltration
Date: - - Inspector: BMP ID No.:
Permit No.: APN(s):
INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 5 of 5
Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted
Standing water in BMP for longer than 24-96 E Make appropriate corrective measures
hours following a storm event* such as adjusting irrigation system,
Surface ponding longer than approximately 24 removing obstructions of debris or
.
hours following a storm event may be invasive vegetation, clearing
. . . .
detrimental to vegetation health underdrains, or repairing/replacing
clogged or compacted soils
Maintenance Needed? E Other/ Comments:
L YES
E NO
Presence of mosquitos/larvae E Apply corrective measures to remove
standing water in BMP when standing
For images of egg rafts, larva, pupa, and adult water occurs for longer than 24-96
mosquitos, see hours following a storm event.**
http://www.mosguito.org/biology El Other / Comments:
Maintenance Needed?
YES
D NO
L N/A
*Surface ponding longer than approximately 24 hours following a storm event may be detrimental to vegetation health, and surface ponding longer than approximately 96 hours
following a storm event poses a risk of vector (mosquito) breeding. Poor drainage can result from clogging of the media layer, filter course, aggregate storage layer, underdrain,
or outlet structure. The specific cause of the drainage issue must be determined and corrected.
**If mosquitos persist following corrective measures to remove standing water, or if the BMP design does not meet the 96-hour drawdown criteria due to release rates
controlled by an orifice installed on the underdrain, the [City Engineer] shall be contacted to determine a solution. A different BMP type, or a Vector Management Plan prepared
with concurrence from the County of San Diego Department of Environmental Health, may be required.
BF-]. Page 11 of 11
January 12, 2017
ATTACHMENT 4
City standard Single Sheet BMP (SSBMP) Exhibit
[Use the City's standard Single Sheet BMP Plan.]
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PORTS RESPONSIBLE FOR MBJTOTCNNACE: SOP CONOIOOCT1OS 0000 INSPECTiON HOSTS
COCL5040. 11 11A CONTACT KEYN CTOBF000 PBTOOEoI000TNTEeNSMLSTPBoATON -
PL020PREPAREO BY: ABSSTBT000BCLFrTEBVASFVINGTINTFSRLWTBSTB00000T
T 170
SAN A0. CALIfCOYlY. 02121 PSESTOTS000BOFSAOLNITB&TSEOBVTLCOBABBTS0000BLO
SNAP NOTES caarniro 71503 12-31_2020
T.
BMP TABLE
I I0Y0ROMOEIFICATI0N & TREATMENT CONTROL
LOW IMPACT DESIGN
SOURCE CONTROL
"AS BUILT"
--
POIN`S-Ep417CpD—MMUNITY
PHASE IV - DOG PARK & PAPKING LOT
_________________________________________
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----
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PARK & PARKING LOT
________________________
-- A•UON• - I_
MATCHLINE
P9015 RESPONSIBLE FOR MBJNTtNANCE: BUT CONSTSUCEON AND INSPECiTON NOTES:
FI.9N PREPARED BY: BRNRBTAURNOLETTBRVNPWYBOTIATPERURRHTB&WSMA
SAY REAR CALWASMA 92122 pRRETonB.s9uramErRaERBBBSpaRaE
SUP NOTES MRTEEUTEUh1BRS12J1202O
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4. I-
4
SOURCE CONTROL
BTSTONS