HomeMy WebLinkAboutCDP 2022-0008; MARTIN RESIDENCE; PRELIMINARY STORM WATER QUALITY MANAGEMENT PLAN; 2022-05-01
CITY OF CARLSBAD
PRIORITY DEVELOPMENT PROJECT (PDP) PRELIMINARY STORM WATER QUALITY MANAGEMENT PLAN (SWQMP)
FOR MARTIN RESIDENCE
(UNASSIGNED) BUENA VISTA CIRCLE APN: 155-221-05-00
CDP 2022-0008
ENGINEER OF WORK:
_____________________________________________
TYLER G LAWSON, PE #80356
PREPARED FOR: PAMELA KAYE SULLIVAN MARTIN, TRUSTEE OF THE PAMELA KAYE SULLIVAN MARTIN LIVING TRUST VACANT LOT ON BUENA VISTA CIRCLE CARLSBAD, CA 92008 PH: (760) 402-9874
PREPARED BY:
PASCO, LARET, SUITER & ASSOCIATES 1911 SAN DIEGO AVENUE, SUITE 100 SAN DIEGO, CA 92110
PH: (858) 259-8212 DATE: MAY 2022
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 1a: DMA Exhibit Attachment 1b: Tabular Summary of DMAs and Design Capture Volume Calculations Attachment 1c: Harvest and Use Feasibility Screening Attachment 1d: Categorization of Infiltration Feasibility Condition Attachment 1e: Pollutant Control BMP Design Worksheets / Calculations Attachment 1f: Trash Capture BMP Requirements 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 (Not Included)
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: MARTIN RESIDENCE Project ID: (CDP 2022-0008)
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. ________________________________________________________ Engineer of Work's Signature, PE Number & Expiration Date
Tyler Lawson_____________________________________________
Print Name
Pasco, Laret, Suiter & Associates_____________________________ Company ____________________________ Date
PROJECT VICINITY MAP
BUENA VISTA
CIRCLE
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VICINITY MAP
SCALE: NTS
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, ‘STANDARD PROJECT’ with TRASH CAPTURE 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: APN:
ADDRESS:
The project is (check one): New Development Redevelopment
The total proposed disturbed area is: ft2 ( ) acres
The total proposed newly created and/or replaced impervious area is: ft2 ( ) 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.
This Box for City Use Only
City Concurrence:
YES NO Date: Project ID:
By:
E-34 Page 1 of 4 REV 02/22
Development Services
Land Development Engineering
1635 Faraday Avenue
442-339-2750
www.carlsbadca.gov
STORM WATER STANDARDS
QUESTIONNAIRE E-34
INSTRUCTIONS:
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Carlsbad
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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 6, mark the 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 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: 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; OR b) Designed and constructed to be hydraulically disconnected from paved streets or roads; OR
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 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 6, 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.
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* Environmentally 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 Plan; and any other equivalent environmentally sensitive areas which have been identified by the City.
STEP 3 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, 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, motorcycles, and other vehicles.
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 overland 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 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 6, 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, complete the trash capture questions..
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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) = 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 6, 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 6, check the first box stating, “My project is a PDP …” and complete applicant information.
STEP 5 TO BE COMPLETED FOR STANDARD PROJECTS
Complete the question below regarding your Standard Project (SDRWQCB Order No. 2017-0077): YES NO
Is the Standard Project within any of the following Priority Land Use (PLU) categories?
R-23 (15-23 du/ac), R-30 (23-30 du/ac), PI (Planned Industrial), CF (Community Facilities), GC (General
Commercial), L (Local Shopping Center), R (Regional Commercial), V-B (Village-Barrio), VC (Visitor Commercial), O (Office), VC/OS (Visitor Commercial/Open Space), PI/O (Planned Industrial/Office), or
Public Transportation Station
If you answered “yes”, the ‘STANDARD PROJECT’ is subject to TRASH CAPTURE REQUIREMENTS. Go to step 6, check the third box stating, “My project is a ‘STANDARD PROJECT’ subject to TRASH CAPTURE REQUIREMENTS …” and complete applicant information.
If you answered “no”, your project is a ‘STANDARD PROJECT’. Go to step 6, check the second box stating, “My project is a ‘STANDARD PROJECT’…” and complete applicant information. STEP 6 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) per E-35 template 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.
My project is a ‘STANDARD PROJECT’ subject to TRASH CAPTURE REQUIREMENTS and must comply with TRASH CAPTURE REQUIREMENTS of the BMP Manual. I understand I must prepare a TRASH CAPTURE Storm Water Quality Management Plan (SWQMP) per E-35A template for submittal at time of application.
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.
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:
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SITE INFORMATION CHECKLIST
Project Summary Information
Project Name MARTIN RESIDNECE
Project ID (CDP 2022-0008)
Project Address
Vacant lot on Buena Vista Circle
Carlsbad, CA 92008
Assessor's Parcel Number(s) (APN(s)) 155-221-05-00
Project Watershed (Hydrologic Unit) Carlsbad 904.21 (Buena Vista Creek)
Parcel Area
0.616 Acres (26,811 Square Feet)
Existing Impervious Area
(subset of Parcel Area)
0.00 Acres (100 Square Feet)
Area to be disturbed by the project
(Project Area)
0.323 Acres (14,091 Square Feet)
Project Proposed Impervious Area
(subset of Project Area)
0.228 Acres (9,949 Square Feet)
Project Proposed Pervious Area
(subset of Project Area)
0.103 Acres (4,142 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):
Existing Development
Previously graded but not built out
Agricultural or other non-impervious use
Vacant, undeveloped/natural
Description / Additional Information:
Existing Land Cover Includes (select all that apply):
Vegetative Cover
Non-Vegetated Pervious Areas
Impervious Areas
Description / Additional Information:
Underlying Soil belongs to Hydrologic Soil Group (select all that apply):
NRCS Type A
NRCS Type B
NCRS Type C
NRCS Type D
Approximate Depth to Groundwater (GW):
GW Depth < 5 feet
5 feet < GW Depth < 10 feet
10 feet < GW Depth < 20 feet
GW Depth > 20 feet
Existing Natural Hydrologic Features (select all that apply):
Watercourses
Seeps
Springs
Wetlands
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]:
(1) Existing drainage conveyance can be categorized as natural. There is not any significant
drainage infrastructure onsite to convey storm water, and water travels through the site on the
surface by way of sheet flow. Water eventually leaves the site in two locations. The majority of
the site drains towards the western property line and onto Buena Vista Lagoon. The remaining
eastern portion of the site drains to the eastern property line. Runoff from the eastern portion of
the site continues to sheet flow on Buena Vista Circle before entering a culvert that drains to
Buena Vista Lagoon.
(2) There are not any existing onsite storm water conveyance systems on site. Water
eventually leaves the subject property at the western and eastern property lines.
(3) No, there does not appear to be any runoff from offsite entering the project site.
Description of Proposed Site Development and Drainage Patterns
Project Description / Proposed Land Use and/or Activities:
The project proposes to demolish all existing onsite structures, clear and grub the site, and
construct 1 new single-family homes with other hardscape and landscape improvements typical
of single-family development.
List/describe proposed impervious features of the project (e.g., buildings, roadways, parking
lots, courtyards, athletic courts, other impervious features):
Proposed impervious features onsite include buildings / roof areas, concrete walkways,
driveways, pool/spa.
List/describe proposed pervious features of the project (e.g., landscape areas):
Proposed pervious features onsite include landscaping and a biofiltration treatment control
BMP.
Does the project include grading and changes to site topography?
Yes
No
Description / Additional Information:
Project proposes to precise grade the site along with some changes to onsite topography. The
onsite grading consists of approximately 10 CY of cut and 1,200 CY of fill, resulting in 1,190 CY
of import. The proposed drainage system has been designed to flow from east to west into a
biofiltration basin with partial retention for treatment control and detention.
Does the project include changes to site drainage (e.g., installation of new storm water
conveyance systems)?
Yes
No
Description / Additional Information:
Although the project proposes onsite grading, the drainage patterns after precise grading mimic
pre-development patterns. The majority of the site will continue to drain from east to west, and
discharge to Buena Vista Lagoon after being treated in a biofiltration basin. In the post-
development condition new drainage infrastructure will be installed to direct drainage from east
to west toward a biofiltration basin near the 100-foot wetland set back. Drainage swales, area
drains, storm drainpipes will be used to manage storm water flows to the biofiltration basin. The
remaining portion of the site draining to the eastern property line will meet pollutant and
hydromodification control after being routed to a proposed 20-foot diameter tree well.
Identify whether any of the following features, activities, and/or pollutant source areas will be
present (select all that apply):
On-site storm drain inlets
Interior floor drains and elevator shaft sump pumps
Interior parking garages
Need for future indoor & structural pest control
Landscape/Outdoor Pesticide Use
Pools, spas, ponds, decorative fountains, and other water features
Food service
Refuse areas
Industrial processes
Outdoor storage of equipment or materials
Vehicle and Equipment Cleaning
Vehicle/Equipment Repair and Maintenance
Fuel Dispensing Areas
Loading Docks
Fire Sprinkler Test Water
Miscellaneous Drain or Wash Water
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):
Drainage leaving the site eventually makes its way to Buena Vista Lagoon by means of sheet
flow and a culvert draining directly to Buena Vista Lagoon. Runoff continues in Buena Vista
Lagoon before entering into 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
Buena Vista Lagoon Indicator Bacteria
Nutrients
Sedimentation / Siltation
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):
Pollutant
Not Applicable to
the Project Site
Anticipated from the
Project Site
Also a Receiving
Water Pollutant of
Concern
Sediment X
Nutrients X
Heavy Metals
Organic Compounds
Trash & Debris X
Oxygen Demanding
Substances X
Oil & Grease X
Bacteria & Viruses X
Pesticides X
Hydromodification Management Requirements
Do hydromodification management requirements apply (see Section 1.6 of the BMP Design
Manual)?
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 management requirements apply
Based on the maps provided within the WMAA, do potential critical coarse sediment yield areas
exist within the project drainage boundaries?
Yes
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 Control for Post-Project Runoff*
*This Section only required if hydromodification management requirements apply
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.
The project has two POCs, which is identified as “POC-1” and “POC-2” on the HMP Exhibit of
this report. POC-1 is located at the outlet of the biofiltration basin adjacent to the 100-foot
wetland setback. POC-2 is located toward the southeastern corner of the site.
Has a geomorphic assessment been performed for the receiving channel(s)?
No, the low flow threshold is 0.1Q2 (default low flow threshold)
Yes, the result is the low flow threshold is 0.1Q2
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:
N/A
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.
Constraints that influenced storm water management design included the size and scale of the
proposed site plan; however, site grading was done to allow drainage to resemble existing
drainage patterns. There is a 100-foot wetland set back for the Buena Vista Lagoon, since this
area cannot be disturbed the project will use a flow spreader out of the BMP to mimic pre-
development conditions of sheet flow down to the lagoon.
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.
E-36 Page 1 of 4 Revised 02/22
Development Services
Land Development Engineering
1635 Faraday Avenue
442-339-2750
www.carlsbadca.gov
STANDARD PROJECT
REQUIREMENT CHECKLIST
E-36
Project Information
Project Name:
Project ID:
DWG No. or Building Permit No.:
Baseline BMPs for Existing and Proposed Site Features
Complete the Table 1 - Site Design Requirement to document existing and proposed site features and the BMPs to be
implemented for them. All BMPs must be implemented where applicable and feasible. Applicability is generally assumed if a feature exists or is proposed.
BMPs must be implemented for site design features where feasible. Leaving the box for a BMP unchecked means it will not be implemented (either partially or fully) either because it is inapplicable or infeasible. Explanations must be provided in the area below. The table provides specific instructions on when explanations are required.
Table 1 - Site Design Requirement
A. Existing Natural Site Features (see Fact Sheet BL-1)
1. Check the boxes below for each existing feature on the site. 1. Select the BMPs to be implemented for each identified feature. Explain why any BMP not selected is infeasible in the area below.
SD-G Conserve natural features
SD-H Provide buffers around waterbodies
Natural waterbodies
Natural storage reservoirs & drainage corridors -- Natural areas, soils, & vegetation (incl. trees) --
B. BMPs for Common Impervious Outdoor Site Features (see Fact Sheet BL-2)
1. Check the boxes below for each proposed feature. 2. Select the BMPs to be implemented for each proposed feature. If neither BMP SD-B nor
SD-I is selected for a feature, explain why both BMPs are infeasible in the area below.
SD-B Direct runoff to pervious areas
SD-I Construct surfaces from permeable materials
Minimize size of impervious areas
Streets and roads Check this box to confirm that all impervious areas on the site will be minimized
where feasible.
If this box is not checked, identify the surfaces that cannot be minimized in area
below, and explain why it is
Sidewalks & walkways
Parking areas & lots
Driveways
Patios, decks, & courtyards
Hardcourt recreation areas
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E-36 Page 2 of 4 Revised 02/22
Other: _______________ infeasible to do so.
C. BMPs for Rooftop Areas: Check this box if rooftop areas are proposed and select at least one BMP
below.
If no BMPs are selected, explain why they are infeasible in the area below.
(see Fact Sheet BL-3)
SD-B Direct runoff to pervious areas
SD-C Install green roofs
SD-E Install rain barrels
D. BMPs for Landscaped Areas: Check this box if landscaping is proposed and select the BMP below
SD-K Sustainable Landscaping
If SD-K is not selected, explain why it is infeasible in the area below.
(see Fact Sheet BL-4)
Provide discussion/justification for site design BMPs that will not be implemented (either partially or fully):
Baseline BMPs for Pollutant-generating Sources
All development projects must complete Table 2 - Source Control Requirement to identify applicable requirements for documenting pollutant-generating sources/ features and source control BMPs.
BMPs must be implemented for source control features where feasible. Leaving the box for a BMP unchecked means it will not be implemented (either partially or fully) either because it is inapplicable or infeasible. Explanations must be provided in the area below. The table provides specific instructions on when explanations are required.
Table 2 - Source Control Requirement
A. Management of Storm Water Discharges
1. Identify all proposed outdoor
work areas below
Check here if none are proposed
2. Which BMPs will be used to prevent materials from contacting rainfall or runoff? (See Fact Sheet BL-5) Select all feasible BMPs for each work area
3. Where will runoff from the work area be routed? (See Fact Sheet BL-6) Select one or more option for each
work area SC-A Overhead covering
SC-B Separation flows from adjacent areas
SC-C Wind protection
SC-D Sanitary sewer
SC-E Containment system
Other
Trash & Refuse Storage
Materials & Equipment Storage
□ □ □
D
□ □ □
D
D
□
□ □ □ □ □ □ □
□ □ □ □ □ □ □
E-36 Page 3 of 4 Revised 02/22
Loading & Unloading
Fueling
Maintenance & Repair
Vehicle & Equipment Cleaning
Other: _________________
B. Management of Storm Water Discharges (see Fact Sheet BL-7)
Select one option for each feature below:
• Storm drain inlets and catch basins … are not proposed will be labeled with stenciling or signage to discourage dumping (SC-F)
• Interior work surfaces, floor drains &
sumps …
are not proposed will not discharge directly or indirectly to the MS4 or receiving waters
• Drain lines (e.g. air conditioning, boiler,
etc.) …
are not proposed will not discharge directly or indirectly to the MS4 or receiving waters
• Fire sprinkler test water … are not proposed will not discharge directly or indirectly to the MS4 or receiving waters
Provide discussion/justification for source control BMPs that will not be implemented (either partially or fully):
□ □ □ □ □ □ □
□ □ □ □ □ □ □
□ □ □ □ □ □ □
□ □ □ □ □ □ □
□ □ □ □ □ □ □
□ □
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E-36 Page 4 of 4 Revised 02/22
Form Certification
This E-36 Form is intended to comply with applicable requirements of the city’s BMP Design Manual. I certify that it has been completed to the best of my ability and accurately reflects the project being proposed and the applicable BMPs proposed to minimize the potentially negative impacts of this project's land development activities on water quality. I understand and acknowledge that the review of this form by City staff is confined to a review and does not relieve me as the person in charge of overseeing the selection and design of storm water BMPs for this project, of my responsibilities for project design. Preparer Signature: Date:
Print preparer name:
I
SUMMARY OF PDP STRUCTURAL BMPS
PDP Structural BMPs
All PDPs 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.
After development of the project site plan (including size of proposed structures) in accordance
with City of Carlsbad General Plan and local zoning ordinance, the structural BMP deemed
most feasible for the site was a biofiltration basin. The project proposes one biofiltration basin to
be located onsite. Biofiltration basin BMP-1 will be constructed adjacent to the 100-foot wetland
setback at a surface elevation of 43.5 and surface area of 960 sf. The majority of the site will
drain into biofiltration basin BMP-1 with storm water to be conveyed through a series of area
drains, and PVC drain-pipes.
The biofiltration basins will include a 36” x 36” brooks box outlet structure to further facilitate the
conveyance of mitigated water and flows from large storm events. BMP-1 will have 12” of
ponding from the basin surface to the grate inlet at the top of the brooks box. The basin will
have an 18” layer of engineered soil and 10” gravel layer beneath. The brooks box of the BMP
will outlet water into an 8” PVC perforated flow spreader drain-pipe that will discharge water
along the 100-foot wetland setback, similar to the pre-development condition.
The remaining portion of the site will be captured and piped over to the proposed 20-foot
diameter tree well adjacent to Buena Vista Circle, which has been sized for pollutant control and
hydromodification flow-control requirements. The DCV multiplier based on proposed structural
soil volume depth and hydrologic soil type have been applied to the tree well to size a 20-foot
diameter tree. The structural soil volume (23’ x 7’ x 4’ deep) has been sized to provide 2 cubic
feet per area of mature tree canopy in accordance with fact sheet SD-1.
Structural BMP Summary Information
[Copy this page as needed to provide information for each individual proposed
structural BMP]
Structural BMP ID No. BMP-1 (BF-1)
DWG CDP-2022-0008 Sheet No. 2
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)
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
Combine pollutant control and hydromodification control
Pre-treatment/forebay for another structural BMP
Other (describe in discussion section below)
Discussion (as needed):
SF bioretention basin located at the corner where the 100-foot wetland setback meets with
the southernly property line with a finished surface elevation of 43.5. Refer to project DMA
Exhibit for size of drainage area tributary to basin and cross-section of BMP. Emergency
overflow structure included in BMP for higher intensity storm events to convey water offsite also
provided.
Structural BMP Summary Information
[Copy this page as needed to provide information for each individual proposed
structural BMP]
Structural BMP ID No. BMP-2 (BF-1)
DWG CDP-2022-0008 Sheet No. 2-4
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)
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
Combine pollutant control and hydromodification control
Pre-treatment/forebay for another structural BMP
Other (describe in discussion section below)
Discussion (as needed):
20-ft diameter tree well (23’ x 7’ x 4’) is proposed onsite in the front yard adjacent Buena Vista
Circle. Tree well has been sized to comply with pollutant control and hydromodification flow-
control requirements.
Refer to project DMA Exhibit for size of drainage area tributary to tree well. Refer to separate
Coastal Development Permits drawings prepared by PLSA for preliminary details on the
proposed tree well. Sides of tree well are lined with impervious liner, with no liner on bottom in
accordance with recommendations provided by geotechnical engineer.
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
Sequence
Contents Checklist
Attachment 1a DMA Exhibit (Required)
See DMA Exhibit Checklist on the
back of this Attachment cover sheet.
(24”x36” Exhibit typically required)
Included
Attachment 1b Tabular Summary of DMAs Showing
DMA ID matching DMA Exhibit, DMA
Area, and DMA Type (Required)*
*Provide table in this Attachment OR
on DMA Exhibit in Attachment 1a
Included on DMA Exhibit in
Attachment 1a
Included as Attachment 1b,
separate from DMA Exhibit
Attachment 1c Form I-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 I-7.
Included
Not included because the entire
project will use infiltration BMPs
Attachment 1d Form I-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 I-8.
Included
Not included because the entire
project will use harvest and use
BMPs
Attachment 1e Pollutant Control BMP Design
Worksheets / Calculations (Required)
Refer to Appendices B and E of the
BMP Design Manual for structural
pollutant control BMP design
guidelines
Included
Attachment 1f Trash Capture BMP Design
Calculations
Refer to Appendices J of the BMP
Design Manual for Trash Capture
BMP design guidelines
Included
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
(N/A) Existing natural hydrologic features (watercourses, seeps, springs, wetlands)
(N/A) 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 (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)
√ Structural BMPs (identify location and type of BMP)
S
S
S
S
S
S
S
S
S
S
W
W
W
W
W
W
W
W
W
OE
OE
OE
OE
OE
OE
OE
OE
OEOEOEOEOEOEOEOEOE
///
///
///
SDSDSDSD
SD SD SD SD
///
///
///
48"TD
40"TD
18"TD
18"TD
18"TD 18"TD
12"TD16"TD
SW
X
XXXXXXXX
XXX
XX
XX
XX OE OE
RF
=
56
.
2
RF
=
57
.
1
RF=
53.2RF =
53.9
VEGE
VEGE
CO
N
C
44
44
44
44
44
44
44
43
43
4
3
43
43
43
43
43
43
42
42
42
42
42
41
41
41
40
40
40
39
39
39
38
38
38
37
37
37
36
36
36
35
35
35
34
34
34
33
33
33
32
32
32
31
31
31
30
30
30
29
29
29
28
28
28
27
27
27
26
26
26
25
25
25
24
24
24
23
23
23
22
22
22
21
21
21
20
20
20
19
19
19
18
18
18
17
17
17
16
16
16
15
15
15
14
14
14
13
13
13
12
12
12
11
11
11
10
10
10
9
9
9
9
9
8
8
8
8
8
8
8 8
7
AS
P
H
X
X
X
X
X
X
XX
X
X
X
X
X
X 42.4
42.5 43.3
43.6 43.9
42.5
42.3
42.5
42.5
42.6
42.8
42.8
42.8 43.3
43.2
43.2
43.3
43.6
43.6
43.6
43.7
43.7
43.5
43.7
44.3
43.9
42.742.4
43.4 43.8 43.9
44.3
42.9
TC
=
4
3
.
6
5
TC=
4
3
.
6
7
TC=
4
3
.
7
3
TC=4
3
.
5
8
TC=43
.
4
1
TC=43.
2
1
TC=
4
3
.
8
4
TC=
4
3
.
7
0
TC=
4
3
.
6
2
TC=4
3
.
4
7
TC=4
3
.
3
0
TC=43
.
1
0
45.3 FG45.3 TW(42.7 BW)
BU
E
N
A
V
I
S
T
A
C
I
R
C
L
E
N 5
6
°
0
2
'
2
0
"
E
1
1
4
.
8
2
'
N 64°00'37" W 276.98'
N 64°01'09" W 266.00'
BU
E
N
A
V
I
S
T
A
L
A
G
O
O
N
LANDSCAPEDRAINAGESWALE
DMA - 2AREA = 1,810 SF
(0.042 AC)
BMP 1 (BF-1)
BIOFILTRATIONBASINFG = 43.5A = 960 SF
45.0 TG43.8 IE46.8 TW(42.8 BW)45.3 TW(42.8 BW)
44.9 TG
44.3 IE 45.1 HP
44.6 TG43.6 IE
44.7 FG
45.1 HP
43.5 IE
45.3 FG
DMA -1AREA = 11,935 SF(0.274 AC)44.9 FG
45.8 FS / HP
44.7 TG43.6 IE
46.3 TG43.6 IE
43.5 IE
44.8 TG43.6 IE
43.5 IE
45.7 TG44.5 IE45.7 TG
44.3 IE
45.6 TG44.1 IE
A1
A2
A3
A4
A5
A6
A1
A4
A4
A5 A5
B1
B2
B3 B4
DMA - 3AREA = 612 SF(0.014 AC)
BMP 220-FT DIAMTERTREE WELL
L=109.92'
D=10°09'28"
DMA - 4AREA = 168 SF(0.004 AC)
DMA - 5AREA = 198 SF(0.005 AC)
20 40 60
GRAPHIC SCALE 1" = 20'
020
LEGEND
PROPERTY BOUNDARY
CENTERLINE OF ROAD
ADJACENT PROPERTY LINE /RIGHT-OF-WAY
GRADE LIMIT LINE
EXISTING CONTOUR LINE
PROPOSED CONTOUR LINE
DMA 1 BOUNDARY
DMA 2 BOUNDARY
DMA 3 BOUNDARY (SELF-MITIGATING)
DMA 4 BOUNDARY (SELF-MITIGATING)
DMA 5 (DE MINIMIS)
PROPOSED / REMOVED AND REPLACEDIMPERVIOUS AREA WITHIN DISTURBEDAREA OF SITE
PROPOSED BMP / BIOFILTRATION BASINAREA (BF-1)
SELF-MITIGATING AREA PER BMP DESIGN
MANNUAL SECTION 5.2.1
DE MINIMIS AREA PER BMP DESIGNMANNUAL SECTION 5.2.2
PROPOSED 20-FT DIAMETER TREE WELL(HMP SIZED)
256
256
PROJECT SITE AREA CALCULATIONS
TOTAL GROSS SITE AREA 26,811 SF (0.616 AC)TOTAL AREA DISTURBED ON-SITE 14,091 SF (0.323 AC)TOTAL AREA DISTURBED ROW 632 SF (0.015 AC)TOTAL OVERALL DISTURBED AREA 14,723 SF (0.338 AC)EXISTING IMPERVIOUS AREA 100 SF (0.002 AC)PROPOSED ON-SITE IMPERVIOUS AREA 9,949 SF (0.228 AC)
PROPOSED ROW IMPERVIOUS AREA 277 SF (0.006 AC)
PROPOSED ON-SITE PERVIOUS AREA 4,142 SF (0.095 AC)PROPOSED ROW PERVIOUS AREA 355 SF (0.008 AC)*PART OF DISTURBED AREA
DMA AREA (DMA 1)11,935 SF (0.278 AC)DMA AREA (DMA 2)1,810 SF (0.042 AC)DMA AREA (DMA 3) 612 SF (0.014 AC)DMA AREA (DMA 4)168 SF (0.004 AC)
DMA AREA (DMA 5)198 SF (0.005 AC)
SD-1
SD-2
SD-3
SD-5
SD-6
SD-7
SC-1
SC-2
SC-3
SC-4
SC-5
SC-6
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
BMP LEGEND
POST-CONSTRUCTION SITE DESIGN BMPs
MAINTAIN NATURAL DRAINAGEPATHWAYS AND HYDROLOGICFEATURES
CONSERVE NATURAL AREAS,
SOILS, AND VEGETATION
MINIMIZE IMPERVIOUS AREA
SOURCE CONTROL BMPs APPLIED
PREVENTION OF ILLICIT DISCHARGES INTO THE MS4 YES
STORM DRAIN STENCILING AND POSTING OF SIGNAGE YES
PROTECTED OUTDOOR MATERIALS STORAGE AREAS N/A
PROTECT MATERIALS STORED IN OUTDOOR WORK AREAS N/A
PROTECT TRASH STORAGE AREAS N/A
ADDITIONAL BMPs BASED ON POTENTIAL RUNOFF POLLUTANTS:
ONSITE STORM DRAIN INLET YES
INTERIOR FLOOR DRAINS & ELEVATOR SHAFT SUMPS N/A
INTERIOR PARKING GARAGES N/A
NEED FOR FUTURE INDOOR & STR. PEST CONTROL YES
LANDSCAPE / OUTDOOR PESTICIDE USE YES
POOLS, SPAS, PONDS, FOUNTAIN, & WATER FEATURES YES
FOOD SERVICE N/A
TRASH OR REFUSE AREAS N/A
INDUSTRIAL PROCESSES N/A
OUTDOOR STORAGE OF EQUIP. OR MATERIALS N/A
VEHICLE AND EQUIPMENT CLEANING N/A
FUEL DISPENSING AREAS N/A
LOADING DOCKS N/A
FIRE SPRINKLER TEST WATER N/A
MISCELLANEOUS DRAIN OR WASH WATER N/A
PLAZAS, SIDEWALKS, DRIVEWAYS, AND PARKING LOTS YES
VEHICLE / EQUIPMENT REPAIR AND MAINTENANCE N/A
DMA 1 - DCV CALCS
IMPERVIOUS AREA (BUILDING / ROOF)5,667 SF(PCC GAZEBO)378 SF(POOL/SPA)1,967 SF(HARDSCAPE)947 SF
TOTAL 8,959 SF
PERVIOUS AREA (LANDSCAPING / PERVIOUS) 2,016 SF(BIOFILTRATION BASIN) 960 SFTOTAL2,976 SF
TOTAL BASIN AREA 11,935 SF
% IMPERVIOUS AREA 75.1%
IMPERVIOUS AREADISPERSION
RUNOFF COLLECTION
LANDSCAPING WITH NATIVE
OR DROUGHT TOLERANTSPECIES
TOTAL DMA SIZE = 8,764 SF
IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS)
MIN. AREA REQUIRED = 0.03 * 8,764 SF = 263 SF
** 960 SF PROPOSED > 263 SF; THEREFORE STANDARD BIOFILTRATION MIN. AREA REQUIREMENTSMET**
PLAN VIEW - DMA
SCALE: 1" = 20'
ATTACHMENT 1A - DMA EXHIBIT
MARTIN RESIDENCE - VACANT LOT ON BUENA
VISTA CIRCLE
CITY OF CARLSBAD
SHEET 1 OF 2
PLSA 3628J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\REPORTS\SWQMP\DISCRETIONARY\ATTACHMENT 1 - POLLUTANT CONTROL\ATT_1A-B-DMA.DWG
SOIL TYPE INFORMATION
SOIL: TYPE B HYDROLOGIC SOILS PER WEB SOIL SURVEYAPPLICATION AVAILABLE THROUGH UNITED STATESDEPARTMENT OF AGRICULTURE (USDA) WEBSITE
GROUNDWATER INFORMATION
GROUNDWATER WAS NOT ENCOUNTERED. GROUNDWATERDEPTH IS GREATER THAN 20.
TREATMENT CONTROL BMPS
BIOFILTRATION BF-1
TREE WELL SD-A
COARSE SEDIMENT YIELD
NO CRITICAL COARSE SEDIMENT YIELD AREAS TO BEPROTECTED ONSITE OR UPSTREAM OF SUBJECT PROPERTY.REFER TO PRIORITY DEVELOPMENT PROJECT SWQMP
PREPARED BY PASCO, LARET, SUITER & ASSOCIATES DMA 2 - AREA CALCULATIONS
DMA 4 - SELF-MITIGATING
TOTAL BASIN SIZE (A)= 168 SF
SELF-MITIGATING IMPERV. AREA = 0 SFPERCENTAGE IMPERV. AREA = 0.0%
SECTION 5.2.1 OF CITY OF CARLSBAD BMP DESIGN MANUAL ALLOWS SELF-MITIGATING DMAAREAS THAT DRAIN DIRECTLY OFFISTE OR TO THE PUBLIC STORM DRAIN SYSTEM, WITHINCIDENTAL IMPERVIOUS AREAS THAT ARE LESS THAN 5% OF THE SELF-MITIGATING AREA
DMA SUMMARY TABLE
DMA DMA TYPE
TOTAL AREA : 14,723 SF
1 BIOFILTRATION BASIN
2
3
11,935 SF
1,810 SF
612 SF
AREA
TREE WELL
SELF-MITIGATING
DMA 5 - DE MINIMIS
TOTAL BASIN SIZE (A)= 198 SF
TOTAL IMPERVIOUS AREA = 198 SF
SECTION 5.2.2 OF CITY OF CARLSBAD BMP DESIGN MANUAL ALLOWS FOR DE MINIMIS DMAAREAS THAT ARE LESS THAN 250 SQUARE FEET. ALL THE DE MINIMIS AREAS REPRESENTLESS THAN TWO PERCENT OF THE TOTAL ADDED OR REPLACED IMPERVIOUS AREA ANDARE NOT HYDRAULICALLY CONNECTED TO OTHER DE MINIMIS AREAS
IMPERVIOUS AREA (PCC DRIVEWAY)700 SF(HARDSCAPE)443 SFTOTAL1,143 SF
PERVIOUS AREA (LANDSCAPE)507 SF(TREE WELL)160 SFTOTAL667 SF
TOTAL BASIN AREA 1,810 SF
% IMPERVIOUS AREA 63.1%
DMA 2 - DCV CALCS
AREA TRIBUTARY TO BMP (A)= 1,810 SF (0.042 AC)
TOTAL DMA SIZE (Cx*Ax)= 1,197 SF (0.027 AC)WEIGHTED RUNOFF COEFFICIENT = 0.6685TH PERCENTILE STORM DEPTH = 0.60 IN
DCV (C*D*A*3,600)= 59.85 CU. FTHMP SIZING FACTOR (X)= 3.0HMP DVC (DVC*X)= 179.55 CU. FT
20-FT DIAMETER TREE WELL DVC CREDIT = 180 CU. FT
179.55 CU. FT < 180 CU.FT
AREA TRIBUTARY TO BMP (A)= 11,935 SF / 0.274 AC
TOTAL DMA SIZE = 8,764 SF
WEIGHTED RUNOFF FACTOR (Cx) = 0.7385TH PERCENTILE RAINFALL DEPTH (d) = 0.60 INCHES
DCV (C*d*A*3,630)= 438 CU. FT
DMA 1 - AREA CALCULATIONS
DMA 3 - SELF-MITIGATING
TOTAL BASIN SIZE (A)= 612 SF
SELF-MITIGATING IMPERV. AREA = 26 SFPERCENTAGE IMPERV. AREA = 4.2%
SECTION 5.2.1 OF CITY OF CARLSBAD BMP DESIGN MANUAL ALLOWS SELF-MITIGATING DMAAREAS THAT DRAIN DIRECTLY OFFISTE OR TO THE PUBLIC STORM DRAIN SYSTEM, WITHINCIDENTAL IMPERVIOUS AREAS THAT ARE LESS THAN 5% OF THE SELF-MITIGATING AREA
4 168 SF
5 198 SFDI MINIMIS
SELF-MITIGATING
\ I I
I I
I l.,__--i-1 __ '!"'1 ...... ~I I L ____ c __ s ___ _
,-
(
'
I
/
OMA TABLE -TREATMENT (OMA 1)
OMA/ AREA POST-PROJECT SURFACE ADJUSTMENT AREAX
BMP (SF) SURFACE TYPE RUNOFF FACTOR ADJUSTED
FACTOR RUNOFF (SF)
Al 5667 ROOF 0.9 1 5100
A2 378 PCCGAZEBO 0.9 1 340
A3 1967 POOUSPA 0.9 1 1770
A4 947 HARDSCAPE WALKWAYS 0.9 1 852
A5 2016 LANDSCAPE 0.3 1 605
A6 960 BMP 0.1 1 96
TOTAL 8764
I
I
I
I
I
I
OMA/
BMP
B1
B2
B3
B4
TOTAL
AREA
(SF)
700
443
507
160
\\
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
OMA TABLE -TREATMENT (OMA 2)
POST-PROJECT SURFACE
RUNOFF ADJUSTMENT
SURFACE TYPE FACTOR FACTOR
PCC DRIVEWAY 0.9 1
HARDS CAPE 09 1
LANDSCAPE 0.3 1
TREE WELL 0.1 1
AREAX
ADJUSTED
RUNOFF (SF)
630
399
152
16
1197
--------
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+++++++++++++++++++ +++++++++++++++++++
1 ////////////////////✓✓1
((((((((((((((((((((((
PASCO LARET SUITER
I 1-\~~(C))tl.\l!E~
San Diego I Solana Beach I Orange Coun1y
Phone 858.259.8212 I www.plsaengineering.com
PLANT MIX PERLANDSCAPEARCHITECT PLAN
PROPOSED 36" X 36" BROOKSBOX WITH GRATED INLET;TOP OF GRATE = PER PLAN
PROPOSED 6" GRAVELSTORAGE LAYER OF 3/4"CRUSHED ROCKPROPOSED 4"
LAYER OF WASHED
3/8" PEA GRAVEL
FG = PERPLAN
PROPOSED 18"ENGINEERED SOILLAYER;*SEE NOTE BELOW
PROPOSED 6" PERFORATED PVC PIPELATERAL WITH FILTER FABRICPERFORATIONS AT THE INVERT;LATERAL TO CONNECT TO 6"TRUNKLINE; 41.25 IE
12"
BOTTOM OF BMPELEV = 41.0
3" LAYERHYDRAULIC MULCH
IMPERVIOUS LINERALONG SIDES ANDBOTTOM OF BMP
IMPERVIOUS LINERALONG SIDES ANDBOTTOM OF BMP
100-FT WETLAND
SETBACK
X
X PRIVACY FENCE
ON RETAININGWALL X
X PROTECTIVERAILING / FALLPROTECTION
PONDINGDEPTH
PROPOSED 4" PVC STORM DRAIN
OUTLET PIPE FROM BROOKS BOX FORLOW FLOW STORM EVENTS W/ FLOWCONTROL; 41.25 IE
PROPOSED 6" PVC STORM DRAIN
OUTLET PIPE FROM BROOKSBOX FOR HIGH FLOW STORMEVENTS; 42.2 IE
6" FREEBOARD
FLOW SPREADERAND RIP RAP
PROPOSED 6" PERFORATED PIPE
TRUNKLINE TO CONNECT TO BROOKS BOXFROM STORAGE LAYER WITH ORIFICEPLATE PER DETAIL THIS SHEET
*BIOFILTRATION "ENGINEERED SOIL" LAYER SHALL BE EVENLYMIXED COMPOSITION OF WASHED SAND, SANDY LOAM TOPSOIL,AND HUMIC COMPOST. THE MIX SHALL CONTAIN 65% SAND, 20%TOPSOIL, AND 15% COMPOST OR HARDWOOD MULCH INACCORDANCE WITH COUNTY OF SAN DIEGO LID BIOSWALE MEDIABIO65 CUT SHEET.
PLANT MIX PER
LANDSCAPE
ARCHITECT PLAN PROPOSED 36" X 36" BROOKSBOX WITH GRATED INLET;TOP OF GRATE = PER PLAN
PONDINGDEPTH
PROPOSED 6" GRAVELSTORAGE LAYER OF 3/4"CRUSHED ROCKPROPOSED 4"LAYER OF WASHED3/8" PEA GRAVEL
FG = PERPLAN
PROPOSED 6" PERFORATED PIPETRUNKLINE TO CONNECT TO BROOKS BOXFROM STORAGE LAYER WITH ORIFICEPLATE PER DETAIL THIS SHEET; 41.25 IE
PROPOSED 18"ENGINEERED SOILLAYER;*SEE NOTE BELOW
12"
BOTTOM OF BMPELEV = 41.0
3" LAYERHYDRAULIC MULCH
PROPOSED 4" PVC STORM DRAINOUTLET PIPE FROM BROOKS BOX FORLOW FLOW STORM EVENTS W/ FLOWCONTROL; 41.25 IE
IMPERVIOUS LINERALONG SIDES ANDBOTTOM OF BMP
IMPERVIOUS LINERALONG SIDES ANDBOTTOM OF BMP
ORIFICEPLATEDRILLED TOINSIDE OFBOX PER
DETAIL THIS
SHEET
X
X PRIVACY FENCEON RETAININGWALL
X
X PROTECTIVE
RAILING / FALLPROTECTION
PROPOSED 6" PVC STORMDRAIN OUTLET PIPE FROMBROOKS BOX FOR HIGH FLOWSTORM EVENTS; 42.2 IE
6" FREEBOARD
OFFICE PLATE TO RESTRICT FLOWFOR LOW FLOW STROM EVENTS;
0.425" LOW-FLOW ORIFICE
PL
0.425" LOW FLOW ORIFICE
20' DIAMETER STREET TREE WITH644 CF MIN STRUCTURAL SOIL (7'WIDE X 23' LONG X 4' DEEP)
B B
A
A 7' X 23' LIMIT OFSTRUCTUAL SOIL
LA
LIMITS OF 30 MIL PLASTICIMPERMEABLE LINERAROUND STRUCTURAL SOIL
LA
LA
4" PVC STORM DRAIN
4" PVC STORM DRAIN
MODIFIED PCC HEADWALL PER DETAILTHIS SHEET
MODIFIED PCC HEADWALL PER DETAILTHIS SHEET
SPLASH
PAD PER SDC GS
DS GS-5.06
SPLASHPAD PER SDC GSDS GS-5.06
PROPERTY LINE
PROPERTY LINE
6" SAND FILTERLAYER
ROOT BARRIERPER SDRSD L-6
30 MIL PLASTICIMPERMEABLE LINER
48" DEEPSTRUCTURAL SOIL*
DEEP ROOT TREEBUBBLER PERSDRSD DWG I-4
UNCOMPACTED SUBGRADE
COMPACTED
SUBGRADE
ROOTBALL
30 MIL PLASTIC
IMPERMEABLE LINER
3" MULCH
ADJACENT LANDSCAPEDWITHIN PROPERTY
FRONTAGE
COMPACTEDSUBGRADE
4:1
10"
4:1
ADJACENT LANDSCAPEDWITHIN PROPERTY
FRONTAGE
ROOT BARRIERPER SDRSD L-6SPLASHPAD PER SDC GS
DS GS-5.06
*MODIFIED FROM STANDARD
23'
SD
MODIFIED PCC CUT OFFWALL SEE DETAIL THISSHEET
MODIFIED PCC CUT OFFWALL SEE DETAIL THISSHEET
4" PVC STORMDRAIN
4" PVC STORMDRAIN
SD
SPLASHPAD PER SDC GSDS GS-5.06
LANDSCAPEAREA
COMPACTEDSUBGRADE
COMPACTED
SUBGRADE
6" SANDFILTER LAYER
ROOT BARRIERPER SDRSD L-6
30 MIL PLASTICIMPERMEABLE LINER
48" DEEPSTRUCTURAL SOIL*
DEEP ROOT TREEBUBBLER PERSDRSD DWG I-4
UNCOMPACTED SUBGRADE
3" MIN MULCHLAYER
ROOTBALL
30 MIL PLASTICIMPERMEABLE LINER
4:110"
*MODIFIED FROMSTANDARD
7' LIMITS OF STRUCTURAL SOIL
PL
LANDSCAPEAREA
INFLOW PIPE FROM
STORAGE LAYER
LOW-FLOW 0.425"
ORIFICE
ORIFICE PLATE: MIN SQUAREDIMENSIONS 1.0 FT GREATERTHAN PIPE DIA. HOT DIPGALVANIZED PLATE AFTER HOLESHAVE BEEN DRILLED; CONNECT
TO INSIDE WALL OF OUTLET
STRUCTURE
MIN. 6" (TYP.)
NOTE: ORIFICE AND FLANGECONNECTION TO CONCRETESHALL BE FILLED WITH 30DUROMETER NEOPRENE RING
12"
M
A
X
3/8" DIA.HOLE (TYP.)
3"
TY
P
.
STORM DRAIN PIPE(SIZE PER PLAN)
PCC HEADWALLTHICKNESS=8"
DASHED LINEREPRESENTS EXISTINGGRADE AT INVERT
DD
8"D
D
PLSA 3628J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\REPORTS\SWQMP\DISCRETIONARY\ATTACHMENT 1 - POLLUTANT CONTROL\ATT_1A-B-DMA.DWG
TYPICAL SECTION - BIOFILTRATION BASIN BMP-1
SCALE: NOT TO SCALE
TYPICAL SECTION - BIOFILTRATION BASIN BMP-1
SCALE: NOT TO SCALE
SECTION A-A-TREE WELL W/O GRATE MODIFIED
SDC GS DS SD-1.04A+GS-1.04B
SCALE: NOT TO SCALE
PLAN VIEW - CURB CUT @ TREE WELL
SDC GS DS GS-5.01
SCALE: NOT TO SCALE
SECTION A-A-TREE WELL W/O GRATE
MODIFIED SDC GS DS SD-1.04A+GS-1.04B
SCALE: NOT TO SCALE
TYPICAL DETAIL - FLOW CONTROL ORIFICE PLATE
NOT TO SCALE
ATTACHMENT 1A - DMA EXHIBIT
MARTIN RESIDENCE - VACANT LOT ON BUENA
VISTA CIRCLE
CITY OF CARLSBAD
SHEET 2 OF 2
TYPICAL DETAIL - MODIFIED PCC CUTOFF WALL
NOT TO SCALE
-
7
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----q--------:;--,,
• •
•
PASCO LARET SUITER
I 1-\~~(C))tl.\l!E~
San Diego I Solana Beach I Orange Coun1y
Phone 858.259.8212 I www.plsaengineering.com
Appendix K: Forms and Checklists
K-2 Sept. 2021
Harvest and Use Feasibility Checklist Form K-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?
Toilet and urinal flushing
Landscape irrigation
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.
[Provide a summary of calculations here]
3. Calculate the DCV using worksheet B-2.1.
DCV = __________ (cubic feet)
3a. Is the 36 hour demand greater
than or equal to the DCV?
Yes / No
3b. Is the 36 hour demand greater than
0.25DCV but less than the full DCV?
Yes / No
3c. Is the 36 hour demand
less than 0.25DCV?
Yes
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.
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.
Harvest and use is
considered to be infeasible.
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.
Note: 36-hour demand calculations are for feasibility analysis only. Once feasibility analysis is complete the
applicant may be allowed to use a different drawdown time provided they meet the 80% annual capture standard
(refer to B.4.2) and 96-hour vector control drawdown requirement.
1t 1t ~ ¢::l ¢:I
□
□
□
B-2
B-1 B-4
B-3
B-1
Qop
Tsa
Tsa
Qop
Tsa A'A PT-3 PT-4
PT-1
PT-2 Approximate Boring Location
(CWE 2021)
Approximate Boring Location
(SGC 2000)
Approximate Percolation Test Location
Old Paralic Deposits overSantiago Formation
Santiago Formation
Geologic Contact
Geologic Cross Section
QopTsa
CWE LEGEND
B-1
B-4
Note: Topsoils Not Mapped
Tsa
PT-4
DATE: SEPTEMBER 2022
BY: SD
JOB NO.: 2210558.02
PLATE NO.: 1
SITE PLAN AND GEOTECHNICAL MAP
PROPOSED SINGLE-FAMILY RESIDENCELOT 5 OF BUENA VISTA CIRCLECARLSBAD, CALIFORNIA
CHRISTIAN WHEELER
E N G I N E E R I N G
00 30'60'
SCALE: 1" = 30'
I
/
LOT6
BUENA VISTA
GARDENS
MAP2492
PLAN VIEW -PRELIMINARY SITE PLAN
EX/STINGSmucnJRE
TOREJIAIN
r'1¼.,../r
; • <:;:
,,r~ "
•
PASCO LAREY SUITER
<I ~SSIOC!~iilES
San Diego I Solana Beach I Orange County
Phone 858.259.82121 www.plsaengineering.com
Appendix D: Geotechnical Engineer Analysis
Appendix D Geotechnical Engineer
Analysis
.1 Analysis of Infiltration Restrictions
This section is only applicable if the analysis of infiltration restrictions is performed by a
licensed engineer practicing in geotechnical engineering. The SWQMP Preparer and
Geotechnical Engineer must work collaboratively to identify any infiltration restrictions identified in
Table D.1-1 below. Upon completion of this section, the Geotechnical Engineer must characterize
each DMA as Restricted or Unrestricted for infiltration and provide adequate support/ discussion in
the geotechnical report. A DMA is considered restricted when one or more restrictions exist which
cannot be reasonably resolved through site design changes.
Table D.1-1: Considerations for Geotechnical Analysis oflnfiltration Restrictions
Mandatory
Considerations
Optional
Considerations
Result
Restriction Element
BMP is within 100' of Contaminated Soils
BMP is within 100' of Industrial Activities Lacking Source Control
BMP is within 100' of Well/ Groundwater Basin
BMP is within 50' of Septic Tanks/Leach Fields
BMP is within 10' of Structures/Tanks/Walls
BMP is within 1 O' of Sewer Utilities
BMP is within 10' of Groundwater Table
BMP is within Hydric Soils
BMP is within Highly Liquefiable Soils and has Connectivity to Structures
BMP is within 1.5 Times the Height of Adjacent Steep Slopes (~25%)
County Staff has Assigned "Restricted" Infiltration Category
BMP is within Predominantly Type D Soil
BMP is within 1 O' of Property Line
BMP is within Fill Depths of ~5' (Existing or Proposed)
BMP is within 10' of Underground Utilities
BMP is within 250' of Ephemeral Stream
Other (Provide detailed geotechnical support)
Based on examination of the best available information,
Is Element
Applicable?
(Yes/No)
□
I have not identified any restrictions above. Unrestricted
Based on examination of the best available information, D
I have identified one or more restrictions above. Restricted
Table D.1-1 1s divided into Mandatory Considerations and Optional Considerations. Mandatory
D-1 Sept. 2021
Appendix D: Geotechnical Engineer Analysis
Appendix D Geotechnical Engineer
Analysis
.1 Analysis of Infiltration Restrictions
This section is only applicable if the analysis of infiltration restrictions is performed by a
licensed engineer practicing in geotechnical engineering. The SWQMP Preparer and
Geotechnical Engineer must work collaboratively to identify any infiltration restrictions identified in
Table D.1-1 below. Upon completion of this section, the Geotechnical Engineer must characterize
each DMA as Restricted or Unrestricted for infiltration and provide adequate support/ discussion in
the geotechnical report. A DMA is considered restricted when one or more restrictions exist which
cannot be reasonably resolved through site design changes.
Table D.1-1: Considerations for Geotechnical Analysis oflnfiltration Restrictions
Mandatory
Considerations
Optional
Considerations
Result
Restriction Element
BMP is within 100' of Contaminated Soils
BMP is within 100' of Industrial Activities Lacking Source Control
BMP is within 100' of Well/ Groundwater Basin
BMP is within 50' of Septic Tanks/Leach Fields
BMP is within 10' of Structures/Tanks/Walls
BMP is within 1 O' of Sewer Utilities
BMP is within 10' of Groundwater Table
BMP is within Hydric Soils
BMP is within Highly Liquefiable Soils and has Connectivity to Structures
BMP is within 1.5 Times the Height of Adjacent Steep Slopes (~25%)
County Staff has Assigned "Restricted" Infiltration Category
BMP is within Predominantly Type D Soil
BMP is within 1 O' of Property Line
BMP is within Fill Depths of ~5' (Existing or Proposed)
BMP is within 10' of Underground Utilities
BMP is within 250' of Ephemeral Stream
Other (Provide detailed geotechnical support)
Based on examination of the best available information,
Is Element
Applicable?
(Yes/No)
□
I have not identified any restrictions above. Unrestricted
Based on examination of the best available information, D
I have identified one or more restrictions above. Restricted
Table D.1-1 1s divided into Mandatory Considerations and Optional Considerations. Mandatory
D-1 Sept. 2021
Appendix D: Geotechnical Engineer Analysis
D-2 Sept. 2021
Considerations include elements that may pose a significant risk to human health and safety and must
always be evaluated. Optional Considerations include elements that are not necessarily associated with
human health and safety, so analysis is not mandated through this guidance document. All elements
presented in this table are subject to the discretion of the Geotechnical Engineer if adequate
supporting information is provided.
Applicants must evaluate infiltration restrictions through use of the best available data. A list of
resources available for evaluation is provided in Section B.2
Determination of Design Infiltration Rates
This section is only applicable if the determination of design infiltration rates is performed
by a licensed engineer practicing in geotechnical engineering. The guidance in this section
identifies methods for identifying observed infiltration rates, corrected infiltration rates, safety factors,
and design infiltration rates for use in structural BMP design. Upon completion of this section, the
Geotechnical Engineer must recommend a design infiltration rate for each DMA and provide
adequate support/discussion in the geotechnical report.
Table D.2-1: Elements for Determination of Design Infiltration Rates
Item Value Unit
Initial Infiltration Rate
Identify per Section D.2.1 in/hr
Corrected Infiltration Rate
Identify per Section D.2.2 in/hr
Safety Factor
Identify per Section D.2.3 unitless
Design Infiltration Rate
Corrected Infiltration Rate ÷ Safety Factor in/hr
D.2
Suitability
Assessment
(A)
Design
(B)
Appendix D: Approved Infiltration Rate Assessment Methods
Table D.2-3: Determination of Safety Factor
Infiltration Testing Method 0.25
Soil Texture Class 0.25 Refer to
Soil Variability 0.25 Table D.2-4
Depth to Groundwater/Obstruction 0.25
Pretreatment
Resiliency
Compaction
Suitability Assessment Safety Factor, SA = I.p
0.50
0.25
0.25
Refer to
Table D.2-4
Design Safety Factor, SB = I.p
Safety Factor, S = SA x SB
(Must be always greater than or equal to 2)
The geotechnical engineer should reference Table D.2-4 below in order to determine appropriate
factor values for use in the table above. The values in the table below are subjective in nature and the
geotechnical engineer may use professional discretion in how the points are assigned.
Table D.2-4: Guidance for Determining Individual Factor Values
----... -------. -, .. . _)~~F;J'ilTTTi"'i\ -, •• . I ,-, .. . -I I • Ill - -- -11• 1 Ill IIL--I-• I I I .. .... ...... ....
Infiltration At least 4 tests within BMP
Testing Any At least 2 tests of any kind footprint, OR Large/Small Scale
Method within 50' ofBMP. Pilot Infiltration Testing over at
least 5% of BMP footprint.
Soil Texture Unknown, Silty, or Granular/Slightly Loamy Class Clayey Loamy
Soil Variability Unknown or High Moderately Homogeneous Significantly Homogeneous
Depth to
Groundwater/ <5' below BMP 5-15' below BMP > 15' below BMP
Obstruction
Provides good pretreatment OR Provides excellent pretreatment
Pretreatment None/Minimal does not receive significant OR only receives runoff from
runoff from unpaved areas rooftops and road surfaces.
Includes underdrain/backup Includes underdrain/backup
Resiliency None/Minimal drainage that ensures ponding drainage AND supports easy
draws down in <96 hours restoration of impacted
infiltration rates.
Compaction Moderate Likelihood Low Likelihood Very Low Likelihood
www.sandiegocounty.gov/ stormwater D-9 Effective September 15, 2020
Test #
Gravel
Adjustment
Factor
Effective
Radius
(inches) r
Depth of
Hole
Below
Existing
Grade
(inches)
Time
Interval
(min.) ∆t
Height of
pipe
above
surface
(feet)
Initial
Water
Depth
without
correction
(feet)
Final Water
Depth
without
correction
(feet)
Initial
Water
Height
with
correction
(inches) Ho
Final
Water
Height
with
correction
(inches) Hf
Change in
head
(inches) ∆H
Average
Head
Height
(inches)
Havg
Gravel
Adjusted
Percolation
Rate
(inch/hour)
Tested
Infiltration
Rate
(inch/hour) It
PT-1 0.44 4 55 10 0.42 3.53 3.85 17.64 13.80 3.84 15.72 10.14 1.14
PT-2 0.44 4 51 10 0.58 3.77 4.08 12.76 9.04 3.72 10.90 9.82 1.52
PT-3 0.44 4 52 10 0.67 3.74 4.15 15.16 10.24 4.92 12.70 12.99 1.77
PT-4 0.44 4 36 10 2.00 3.96 4.16 12.48 10.08 2.40 11.28 6.34 0.95
1.35
"Initial and final water depth without correction" are measurements taken from top of pipe if pipe is sticking out of ground (most cases)
"Initial and final water height with correction" factors in the height of pipe above surface, and provides measurement of water above bottom of pipe
If measurements are taken from grade "Height of pipe above surface" = 0
Gravel Adjustment Factor:
4-inch Diameter Pipe: 1.00 - No Gravel Used (No Caving) 3-inch Diameter Pipe: 1.00 - No Gravel Used (No Caving)
0.51 - 3/4 inch gravel with 8 inch diameter hole 0.44 - 3/4 inch gravel with 8 inch diameter hole
0.56 - 3/4 inch gravel with 7 inch diameter hole 0.47 - 3/4 inch gravel with 7 inch diameter hole
0.64 - 3/4 inch gravel with 6 inch diameter hole 0.51 - 3/4 inch gravel with 6 inch diameter hole
Porchet Method - Tested Percolation Rate Conversion to Tested Infiltration Rate
It = tested infiltration rate, inches per hour
∆H = change in head over the time interval, inches
∆t = time interval, minutes
r = effective radius of test hole
Havg = average head over the time interval, inches
Percolation to Infiltration Rate Conversion (Porchet Method)
It = ∆H 60 r
∆t (r+2Havg )
CWE 2210558.02
PROPOSED MARTIN RESIDENCE
Average Filed Infiltration Rate
Category #Description i Units
1 Drainage Basin ID or Name 1 unitless
2 85th Percentile 24-hr Storm Depth 0.60 inches
3 Impervious Surfaces Not Directed to Dispersion Area (C=0.90) 8,959 sq-ft
4 Semi-Pervious Surfaces Not Serving as Dispersion Area (C=0.30)sq-ft
5 Engineered Pervious Surfaces Not Serving as Dispersion Area (C=0.10) 2,976 sq-ft
6 Natural Type A Soil Not Serving as Dispersion Area (C=0.10)sq-ft
7 Natural Type B Soil Not Serving as Dispersion Area (C=0.14)sq-ft
8 Natural Type C Soil Not Serving as Dispersion Area (C=0.23)sq-ft
9 Natural Type D Soil Not Serving as Dispersion Area (C=0.30)sq-ft
10 Does Tributary Incorporate Dispersion, Tree Wells, and/or Rain Barrels?No yes/no
11 Impervious Surfaces Directed to Dispersion Area per SD-B (Ci=0.90) sq-ft
12 Semi-Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.30)sq-ft
13 Engineered Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.10)sq-ft
14 Natural Type A Soil Serving as Dispersion Area per SD-B (Ci=0.10)sq-ft
15 Natural Type B Soil Serving as Dispersion Area per SD-B (Ci=0.14)sq-ft
16 Natural Type C Soil Serving as Dispersion Area per SD-B (Ci=0.23)sq-ft
17 Natural Type D Soil Serving as Dispersion Area per SD-B (Ci=0.30)sq-ft
18 Number of Tree Wells Proposed per SD-A #
19 Average Mature Tree Canopy Diameter ft
20 Number of Rain Barrels Proposed per SD-E #
21 Average Rain Barrel Size gal
22 Total Tributary Area 11,935 sq-ft
23 Initial Runoff Factor for Standard Drainage Areas 0.70 unitless
24 Initial Runoff Factor for Dispersed & Dispersion Areas 0.00 unitless
25 Initial Weighted Runoff Factor 0.70 unitless
26 Initial Design Capture Volume 418 cubic-feet
27 Total Impervious Area Dispersed to Pervious Surface 0 sq-ft
28 Total Pervious Dispersion Area 0 sq-ft
29 Ratio of Dispersed Impervious Area to Pervious Dispersion Area n/a ratio
30 Adjustment Factor for Dispersed & Dispersion Areas 1.00 ratio
31 Runoff Factor After Dispersion Techniques 0.70 unitless
32 Design Capture Volume After Dispersion Techniques 418 cubic-feet
33 Total Tree Well Volume Reduction 0 cubic-feet
34 Total Rain Barrel Volume Reduction 0 cubic-feet
35 Final Adjusted Runoff Factor 0.70 unitless
36 Final Effective Tributary Area 8,355 sq-ft
37 Initial Design Capture Volume Retained by Site Design Elements 0 cubic-feet
38 Final Design Capture Volume Tributary to BMP 418 cubic-feet
False
False
Automated Worksheet B.1: Calculation of Design Capture Volume (V2.0)
Dispersion
Area, Tree Well
& Rain Barrel
Inputs
(Optional)
Standard
Drainage Basin
Inputs
Results
Tree & Barrel
Adjustments
Initial Runoff
Factor
Calculation
Dispersion
Area
Adjustments
No Warning Messages
Category #Description i Units
1 Drainage Basin ID or Name 1 unitless
2 85th Percentile Rainfall Depth 0.60 inches
3 Predominant NRCS Soil Type Within BMP Location B unitless
4 Is proposed BMP location Restricted or Unrestricted for Infiltration Activities? Restricted unitless
5 Nature of Restriction n/a unitless
6 Do Minimum Retention Requirements Apply to this Project? Yes yes/no
7 Are Habitable Structures Greater than 9 Stories Proposed? No yes/no
8 Has Geotechnical Engineer Performed an Infiltration Analysis? Yes yes/no
9 Design Infiltration Rate Recommended by Geotechnical Engineer 0.000 in/hr
10 Design Infiltration Rate Used To Determine Retention Requirements 0.000 in/hr
11 Percent of Average Annual Runoff that Must be Retained within DMA 4.5% percentage
12 Fraction of DCV Requiring Retention 0.02 ratio
13 Required Retention Volume 8 cubic-feet
False
False
Automated Worksheet B.2: Retention Requirements (V2.0)
Advanced
Analysis
Basic Analysis
Result
No Warning Messages
Category #Description i Units
1 Drainage Basin ID or Name 1 sq-ft
2 Design Infiltration Rate Recommended 0.000 in/hr
3 Design Capture Volume Tributary to BMP 418 cubic-feet
4 Is BMP Vegetated or Unvegetated?Vegetated unitless
5 Is BMP Impermeably Lined or Unlined?Lined unitless
6 Does BMP Have an Underdrain?Underdrain unitless
7 Does BMP Utilize Standard or Specialized Media?Standard unitless
8 Provided Surface Area 960 sq-ft
9 Provided Surface Ponding Depth 12 inches
10 Provided Soil Media Thickness 20 inches
11 Provided Gravel Thickness (Total Thickness)10 inches
12 Underdrain Offset 3 inches
13 Diameter of Underdrain or Hydromod Orifice (Select Smallest)0.43 inches
14 Specialized Soil Media Filtration Rate in/hr
15 Specialized Soil Media Pore Space for Retention unitless
16 Specialized Soil Media Pore Space for Biofiltration unitless
17 Specialized Gravel Media Pore Space unitless
18 Volume Infiltrated Over 6 Hour Storm 0 cubic-feet
19 Ponding Pore Space Available for Retention 0.00 unitless
20 Soil Media Pore Space Available for Retention 0.05 unitless
21 Gravel Pore Space Available for Retention (Above Underdrain)0.00 unitless
22 Gravel Pore Space Available for Retention (Below Underdrain)0.40 unitless
23 Effective Retention Depth 2.20 inches
24 Fraction of DCV Retained (Independent of Drawdown Time)0.42 ratio
25 Calculated Retention Storage Drawdown Time 120 hours
26 Efficacy of Retention Processes 0.41 ratio
27 Volume Retained by BMP (Considering Drawdown Time)170 cubic-feet
28 Design Capture Volume Remaining for Biofiltration 248 cubic-feet
29 Max Hydromod Flow Rate through Underdrain 0.0085 cfs
30 Max Soil Filtration Rate Allowed by Underdrain Orifice 0.38 in/hr
31 Soil Media Filtration Rate per Specifications 5.00 in/hr
32 Soil Media Filtration Rate to be used for Sizing 0.38 in/hr
33 Depth Biofiltered Over 6 Hour Storm 2.30 inches
34 Ponding Pore Space Available for Biofiltration 1.00 unitless
35 Soil Media Pore Space Available for Biofiltration 0.20 unitless
36 Gravel Pore Space Available for Biofiltration (Above Underdrain)0.40 unitless
37 Effective Depth of Biofiltration Storage 18.80 inches
38 Drawdown Time for Surface Ponding 31 hours
39 Drawdown Time for Effective Biofiltration Depth 49 hours
40 Total Depth Biofiltered 21.10 inches
41 Option 1 - Biofilter 1.50 DCV: Target Volume 372 cubic-feet
42 Option 1 - Provided Biofiltration Volume 372 cubic-feet
43 Option 2 - Store 0.75 DCV: Target Volume 186 cubic-feet
44 Option 2 - Provided Storage Volume 186 cubic-feet
45 Portion of Biofiltration Performance Standard Satisfied 1.00 ratio
46 Do Site Design Elements and BMPs Satisfy Annual Retention Requirements?Yes yes/no
47 Overall Portion of Performance Standard Satisfied (BMP Efficacy Factor)1.00 ratio
48 Deficit of Effectively Treated Stormwater 0 cubic-feet
Retention
Calculations
Automated Worksheet B.3: BMP Performance (V2.0)
False
False
BMP Inputs
Biofiltration
Calculations
False
False
-Vegetated BMPs with surface ponding drawdown times over 24 hours must be certified by a landscape architect or agronomist. All BMPs must
False
Result
False
False
Attention!
Category #Description i Units
1 Drainage Basin ID or Name 2 unitless
2 85th Percentile 24-hr Storm Depth 0.60 inches
3 Is Hydromodification Control Applicable? Yes yes/no
4 Impervious Surfaces Not Directed to Dispersion Area (C=0.90) 1,143 sq-ft
5 Semi-Pervious Surfaces Not Serving as Dispersion Area (C=0.30) 507 sq-ft
6 Engineered Pervious Surfaces Not Serving as Dispersion Area (C=0.10) 160 sq-ft
7 Natural Type A Soil Not Serving as Dispersion Area (C=0.10)sq-ft
8 Natural Type B Soil Not Serving as Dispersion Area (C=0.14)sq-ft
9 Natural Type C Soil Not Serving as Dispersion Area (C=0.23)sq-ft
10 Natural Type D Soil Not Serving as Dispersion Area (C=0.30)sq-ft
11 Does Tributary Incorporate Dispersion and/or Rain Barrels?yes/no
12 Does Tributary Incorporate Tree Wells? Yes yes/no
13 Impervious Surfaces Directed to Dispersion Area per SD-B (Ci=0.90) sq-ft
14 Semi-Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.30)sq-ft
15 Engineered Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.10)sq-ft
16 Natural Type A Soil Serving as Dispersion Area per SD-B (Ci=0.10)sq-ft
17 Natural Type B Soil Serving as Dispersion Area per SD-B (Ci=0.14)sq-ft
18 Natural Type C Soil Serving as Dispersion Area per SD-B (Ci=0.23)sq-ft
19 Natural Type D Soil Serving as Dispersion Area per SD-B (Ci=0.30)sq-ft
20 Number of Rain Barrels Proposed per SD-E #
21 Average Rain Barrel Size gal
22 Total Tributary Area 1,810 sq-ft
23 Initial Runoff Factor for Standard Drainage Areas 0.66 unitless
24 Initial Runoff Factor for Dispersed & Dispersion Areas 0.00 unitless
25 Initial Weighted Runoff Factor 0.66 unitless
26 Initial Design Capture Volume 60 cubic-feet
27 Total Impervious Area Dispersed to Pervious Surface 0 sq-ft
28 Total Pervious Dispersion Area 0 sq-ft
29 Ratio of Dispersed Impervious Area to Pervious Dispersion Area for DCV Reduction n/a ratio
30 Adjustment Factor for Dispersed & Dispersion Areas 1.00 ratio
31 Runoff Factor After Dispersion Techniques 0.66 unitless
32 Design Capture Volume After Dispersion Techniques 60 cubic-feet
33 Total Rain Barrel Volume Reduction 0 cubic-feet
34 Final Adjusted Runoff Factor 0.66 unitless
35 Final Effective Tributary Area 1,195 sq-ft
36 Initial Design Capture Volume Retained by Dispersion Area and Rain Barrel(s)0 cubic-feet
37 Remaining Design Capture Volume Tributary to Tree Well(s) 60 cubic-feet
False
False
SSD-BMP Automated Worksheet I-1: Step 1. Calculation of Design Capture Volume (V1.0)
Standard
Drainage Basin
Inputs
Results
No Warning Messages
Dispersion Area
Adjustment &
Rain Barrel
Adjustment
SSD-BMPs
Proposed
Dispersion Area
& Rain Barrel
Inputs
(Optional)
Initial Runoff
Factor
Calculation
False
Category #Description i Units
1 Drainage Basin ID or Name 2 unitless
2 Design Capture Volume Tributary to BMP 60 cubic-feet
3 Is Hydromodification Control Applicable? Yes yes/no
4 Predominant NRCS Soil Type Within Tree Well(s) Location B unitless
5 Select a Tree Species for the Tree Well(s) Consistent with SD-A Tree Palette Table
Note: Numbers shown in list are Tree Species Mature Canopy Diameters
20' - Strawberry
Tree unitless
6 Tree Well(s) Soil Depth (Installation Depth)
Must be 30, 36, 42, or 48 Inches; Select from Standard Depths**48 inches
7 Number of Identical* Tree Wells Proposed for this DMA 1 trees
8 Proposed Width of Tree Well(s) Soil Installation for One (1) Tree 7.0 feet
9 Proposed Length of Tree Well(s) Soil Installation for One (1) Tree 23.0 feet
10 Botanical Name of Tree Species Arbutus Unedo unitless
11 Tree Species Mature Height per SD-A 30 feet
12 Tree Species Mature Canopy Diameter per SD-A 20 feet
13 Minimum Soil Volume Required In Tree Well
(2 Cubic Feet Per Square Foot of Mature Tree Canopy Projection Area)628 cubic-feet
14 Credit Volume Per Tree 180 cubic-feet
15 DCV Multiplier To Meet Flow Control Requirements 3.00 unitless
16 Required Retention Volume (RRV) To Meet Flow Control Requirements 180 cubic-feet
17 Number of Trees Required 1 trees
18 Total Area of Tree Well Soil Required for Each Tree 157 sq-ft
19 Approximate Required Width of Tree Well Soil Area for Each Tree 13 feet
20 Approximate Required Length of Tree Well Soil Area for Each Tree 13 feet
21 Number of Trees Proposed for this DMA 1 trees
22 Total Area of Tree Well Soil Proposed for Each Tree 161 sq-ft
23 Minimum Spacing Between Multiple Trees To Meet Soil Area Requirements
(when applicable)***n/a feet
24 Are Tree Well Soil Installation Requirements Met? Yes yes/no
25 Is Remaining DCV Requirement Fully Satisfied by Tree Well(s)? Yes yes/no
26 Is Hydromodification Control Requirement Satisfied by Tree Well(s)? Yes yes/no
Notes:
*If using more than one mature canopy diameter within the same DMA, only the smallest mature canopy diameter should be entered. Alternatively, if more than one mature canopy diameter is proposed and/or the dimensions of multiple tree well installations will vary, separate DMAs may be delineated.
**If the actual proposed installation depth is not available in the table of standard depths, select the next lower depth.
***Tree Canopy or Agency Requirements May Also Influence the Minimum Spacing of Trees.
False
False
False
False
SSD-BMP Automated Worksheet I-3: Step 3. Tree Well Sizing (V1.0)
False
False
Standard Tree
Well Inputs
No Warning Messages
Tree Data
Tree Well Sizing
Calculations
Results
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
Sequence
Contents Checklist
Attachment 2a Hydromodification Management
Exhibit (Required)
Included
Attachment 2b Management of Critical Coarse
Sediment Yield Areas (WMAA Exhibit
is required, additional analyses are
optional)
See Section 6.2 of the BMP Design
Manual.
Exhibit showing project drainage
boundaries marked on WMAA
Critical Coarse Sediment Yield
Area Map (Required)
Optional analyses for Critical Coarse
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
Channels (Optional)
See Section 6.3.4 of the BMP Design
Manual.
Not performed
Included
Attachment 2d Flow Control Facility Design and
Structural BMP Drawdown
Calculations (Required)
See Chapter 6 and Appendix G of the
BMP Design Manual
Included
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
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)
S
S
S
S
S
S
S
S
S
S
W
W
W
W
W
W
W
W
W
OE
OE
OE
OE
OE
OE
OE
OE
OEOEOEOEOEOEOEOEOE
S
///
///
///
SDSDSDSD
SD SD SD SD
S
///
///
///
W
48"TD
40"TD
18"TD
18"TD
18"TD 18"TD
12"TD16"TD
SW
X
XXXXXXXX
XXX
XX
XX
XX OE
OE
RF
=
56
.
2
RF
=
57
.
1
RF=
53.2RF =
53.9
VEGE
VEGE
CO
N
C
44
44
44
44
44
44
44
43
43
4
3
43
43
43
43
43
43
42
42
42
42
42
41
41
41
40
40
40
39
39
39
38
38
38
37
37
37
36
36
36
35
35
35
34
34
34
33
33
33
32
32
32
31
31
31
30
30
30
29
29
29
28
28
28
27
27
27
26
26
26
25
25
25
24
24
24
23
23
23
22
22
22
21
21
21
20
20
20
19
19
19
18
18
18
17
17
17
16
16
16
15
15
15
14
14
14
13
13
13
12
12
12
11
11
11
10
10
10
9
9
9
9
9
8
8
8
8
8
8
8 8
7
AS
P
H
X
X
X
X
X
X
XX
X
X
X
X
X
X 42.4
42.5 43.3
43.6 43.9
42.5
42.3
42.5
42.5
42.6
42.8
42.8
42.8 43.3
43.2
43.2
43.3
43.6
43.6
43.6
43.7
43.7
43.5
43.7
44.3
43.9
42.742.4
43.4 43.8 43.9
44.3
42.9
TC
=
4
3
.
6
5
TC=
4
3
.
6
7
TC=
4
3
.
7
3
TC=4
3
.
5
8
TC=43
.
4
1
TC=43
.
2
1
TC=
4
3
.
8
4
TC=
4
3
.
7
0
TC=
4
3
.
6
2
TC=4
3
.
4
7
TC=4
3
.
3
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TC=43
.
1
0
BU
E
N
A
V
I
S
T
A
C
I
R
C
L
E
BU
E
N
A
V
I
S
T
A
L
A
G
O
O
N
N 56
°
0
2
'
2
0
"
E
1
1
4
.
8
2
'
N 64°00'37" W 276.98'
N 64°01'09" W 266.00'
45.3 FG45.3 TW(42.7 BW)
BU
E
N
A
V
I
S
T
A
C
I
R
C
L
E
N 56
°
0
2
'
2
0
"
E
1
1
4
.
8
2
'
N 64°00'37" W 276.98'
N 64°01'09" W 266.00'
BU
E
N
A
V
I
S
T
A
L
A
G
O
O
N
LANDSCAPEDRAINAGE
SWALE
DMA - 2AREA = 1,810 SF(0.042 AC)
BMP 1 (BF-1)BIOFILTRATIONBASIN
FG = 43.5A = 960 SF
45.0 TG43.8 IE46.8 TW(42.8 BW)45.3 TW(42.8 BW)
44.9 TG44.3 IE 45.1 HP
44.6 TG43.6 IE
44.7 FG
45.1 HP
43.5 IE
45.3 FG
DMA -1
AREA = 11,935 SF(0.274 AC)
44.9 FG
45.8 FS / HP
44.7 TG43.6 IE
46.3 TG43.6 IE
43.5 IE
44.8 TG43.6 IE
43.5 IE
45.7 TG44.5 IE45.7 TG44.3 IE45.6 TG44.1 IE
A3
DMA - 3AREA = 612 SF(0.014 AC)
BMP 220-FT DIAMTERTREE WELL
L=109.92'
D=10°09'28"
DMA - 4AREA = 168 SF(0.004 AC)
DMA - 5AREA = 198 SF(0.005 AC)
POC -1
POC -2
20 40 60
GRAPHIC SCALE 1" = 20'
020
PLAN VIEW - HMP
SCALE: 1" = 20'
ATTACHMENT 2A - HMP EXHIBIT
MARTIN RESIDENCE - VACANT LOT ON BUENA
VISTA CIRCLE
CITY OF CARLSBAD
SHEET 1 OF 2
PLSA 3628J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\REPORTS\SWQMP\DISCRETIONARY\ATTACHMENT 2 - HMP\ATT_2A-HMP.DWG
SOIL TYPE INFORMATION
SOIL: TYPE B HYDROLOGIC SOILS PER WEB SOIL SURVEYAPPLICATION AVAILABLE THROUGH UNITED STATESDEPARTMENT OF AGRICULTURE (USDA) WEBSITE
GROUNDWATER INFORMATION
GROUNDWATER WAS NOT ENCOUNTERED. GROUNDWATERDEPTH IS GREATER THAN 20.
TREATMENT CONTROL BMPS
BIOFILTRATION BF-1TREE WELL SD-A
COARSE SEDIMENT YIELD
NO CRITICAL COARSE SEDIMENT YIELD AREAS TO BEPROTECTED ONSITE OR UPSTREAM OF SUBJECT PROPERTY.REFER TO PRIORITY DEVELOPMENT PROJECT SWQMPPREPARED BY PASCO, LARET, SUITER & ASSOCIATES
HYDROMODIFICATION MANAGEMENT EXHIBIT
MARTINS RESIDENCES
LEGEND
PROPERTY BOUNDARY
CENTERLINE OF ROAD
ADJACENT PROPERTY LINE /
RIGHT-OF-WAY
GRADE LIMIT LINE
EXISTING CONTOUR LINE
PROPOSED CONTOUR LINE
DMA 1 BOUNDARY
DMA 2 BOUNDARY
DMA 3 BOUNDARY (SELF-MITIGATING)
DMA 4 BOUNDARY (SELF-MITIGATING)
DMA 5 (DE MINIMIS)
PROPOSED / REMOVED AND REPLACEDIMPERVIOUS AREA WITHIN DISTURBEDAREA OF SITE
PROPOSED BMP / BIOFILTRATION BASINAREA (BF-1)
SELF-MITIGATING AREA PER BMP DESIGNMANNUAL SECTION 5.2.1
DE MINIMIS AREA PER BMP DESIGN
MANNUAL SECTION 5.2.2
PROPOSED 20-FT DIAMETER TREE WELL(HMP SIZED)
POINT OF COMPLIANCE (POC)
256
256
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PASCO LARET SUITER
I 1-\~~(C))tl.\l!E~
San Diego I Solana Beach I Orange Coun1y
Phone 858.259.8212 I www.plsaengineering.com
PLANT MIX PERLANDSCAPEARCHITECT PLAN
PROPOSED 36" X 36" BROOKSBOX WITH GRATED INLET;TOP OF GRATE = PER PLAN
PROPOSED 6" GRAVELSTORAGE LAYER OF 3/4"CRUSHED ROCKPROPOSED 4"
LAYER OF WASHED
3/8" PEA GRAVEL
FG = PERPLAN
PROPOSED 18"ENGINEERED SOILLAYER;*SEE NOTE BELOW
PROPOSED 6" PERFORATED PVC PIPELATERAL WITH FILTER FABRICPERFORATIONS AT THE INVERT;LATERAL TO CONNECT TO 6"TRUNKLINE; 41.25 IE
12"
BOTTOM OF BMPELEV = 41.0
3" LAYERHYDRAULIC MULCH
IMPERVIOUS LINERALONG SIDES ANDBOTTOM OF BMP
IMPERVIOUS LINERALONG SIDES ANDBOTTOM OF BMP
100-FT WETLAND
SETBACK
PRIVACY FENCE
ON RETAININGWALL
PROTECTIVERAILING / FALLPROTECTION
PONDINGDEPTH
PROPOSED 4" PVC STORM DRAIN
OUTLET PIPE FROM BROOKS BOX FORLOW FLOW STORM EVENTS W/ FLOWCONTROL; 41.25 IE
PROPOSED 6" PVC STORM DRAIN
OUTLET PIPE FROM BROOKSBOX FOR HIGH FLOW STORMEVENTS; 42.2 IE
6" FREEBOARD
FLOW SPREADERAND RIP RAP
PROPOSED 6" PERFORATED PIPE
TRUNKLINE TO CONNECT TO BROOKS BOXFROM STORAGE LAYER WITH ORIFICEPLATE PER DETAIL THIS SHEET
*BIOFILTRATION "ENGINEERED SOIL" LAYER SHALL BE EVENLYMIXED COMPOSITION OF WASHED SAND, SANDY LOAM TOPSOIL,AND HUMIC COMPOST. THE MIX SHALL CONTAIN 65% SAND, 20%TOPSOIL, AND 15% COMPOST OR HARDWOOD MULCH INACCORDANCE WITH COUNTY OF SAN DIEGO LID BIOSWALE MEDIABIO65 CUT SHEET.
PLANT MIX PER
LANDSCAPE
ARCHITECT PLAN PROPOSED 36" X 36" BROOKSBOX WITH GRATED INLET;TOP OF GRATE = PER PLAN
PONDINGDEPTH
PROPOSED 6" GRAVELSTORAGE LAYER OF 3/4"CRUSHED ROCKPROPOSED 4"LAYER OF WASHED3/8" PEA GRAVEL
FG = PERPLAN
PROPOSED 6" PERFORATED PIPETRUNKLINE TO CONNECT TO BROOKS BOXFROM STORAGE LAYER WITH ORIFICEPLATE PER DETAIL THIS SHEET; 41.25 IE
PROPOSED 18"ENGINEERED SOILLAYER;*SEE NOTE BELOW
12"
BOTTOM OF BMPELEV = 41.0
3" LAYERHYDRAULIC MULCH
PROPOSED 4" PVC STORM DRAINOUTLET PIPE FROM BROOKS BOX FORLOW FLOW STORM EVENTS W/ FLOWCONTROL; 41.25 IE
IMPERVIOUS LINERALONG SIDES ANDBOTTOM OF BMP
IMPERVIOUS LINERALONG SIDES ANDBOTTOM OF BMP
ORIFICEPLATEDRILLED TOINSIDE OFBOX PER
DETAIL THIS
SHEET
PRIVACY FENCEON RETAININGWALL
PROTECTIVE
RAILING / FALLPROTECTION
PROPOSED 6" PVC STORMDRAIN OUTLET PIPE FROMBROOKS BOX FOR HIGH FLOWSTORM EVENTS; 42.2 IE
6" FREEBOARD
OFFICE PLATE TO RESTRICT FLOWFOR LOW FLOW STROM EVENTS;
0.425" LOW-FLOW ORIFICE
PL
0.425" LOW FLOW ORIFICE
20' DIAMETER STREET TREE WITH644 CF MIN STRUCTURAL SOIL (7'WIDE X 23' LONG X 4' DEEP)
B B
A
A 7' X 23' LIMIT OFSTRUCTUAL SOIL
LA
LIMITS OF 30 MIL PLASTICIMPERMEABLE LINER
AROUND STRUCTURAL SOIL
LA
LA
4" PVC STORM DRAIN
4" PVC STORM DRAIN
MODIFIED PCC HEADWALL PER DETAILTHIS SHEET
MODIFIED PCC HEADWALL PER DETAILTHIS SHEET
SPLASH
PAD PER SDC GSDS GS-5.06
SPLASHPAD PER SDC GSDS GS-5.06
PROPERTY LINE
PROPERTY LINE
INFLOW PIPE FROMSTORAGE LAYER
LOW-FLOW 0.425"ORIFICE
ORIFICE PLATE: MIN SQUARE
DIMENSIONS 1.0 FT GREATER
THAN PIPE DIA. HOT DIPGALVANIZED PLATE AFTER HOLESHAVE BEEN DRILLED; CONNECTTO INSIDE WALL OF OUTLETSTRUCTURE
MIN. 6" (TYP.)
NOTE: ORIFICE AND FLANGECONNECTION TO CONCRETESHALL BE FILLED WITH 30
DUROMETER NEOPRENE RING
12"
M
A
X
3/8" DIA.
HOLE (TYP.)
3"
TY
P
.
STORM DRAIN PIPE
(SIZE PER PLAN)
PCC HEADWALLTHICKNESS=8"
DASHED LINEREPRESENTS EXISTINGGRADE AT INVERT
DD
8"D
D
6" SAND FILTERLAYER
ROOT BARRIERPER SDRSD L-6
30 MIL PLASTICIMPERMEABLE LINER
48" DEEP
STRUCTURAL SOIL*
DEEP ROOT TREEBUBBLER PERSDRSD DWG I-4
UNCOMPACTED SUBGRADE
COMPACTEDSUBGRADE
ROOTBALL
30 MIL PLASTICIMPERMEABLE LINER
3" MULCH
ADJACENT LANDSCAPEDWITHIN PROPERTYFRONTAGE
COMPACTEDSUBGRADE
4:1
10"
4:1
ADJACENT LANDSCAPEDWITHIN PROPERTYFRONTAGE
ROOT BARRIERPER SDRSD L-6SPLASHPAD PER SDC GSDS GS-5.06
*MODIFIED FROM STANDARD
23'
SD
MODIFIED PCC CUT OFFWALL SEE DETAIL THIS
SHEET
MODIFIED PCC CUT OFF
WALL SEE DETAIL THISSHEET
4" PVC STORMDRAIN
4" PVC STORMDRAIN
SD
SPLASHPAD PER SDC GSDS GS-5.06
LANDSCAPEAREA
COMPACTEDSUBGRADE
COMPACTEDSUBGRADE
6" SANDFILTER LAYER
ROOT BARRIERPER SDRSD L-6
30 MIL PLASTICIMPERMEABLE LINER
48" DEEPSTRUCTURAL SOIL*
DEEP ROOT TREE
BUBBLER PER
SDRSD DWG I-4
UNCOMPACTED SUBGRADE
3" MIN MULCH
LAYER
ROOTBALL
30 MIL PLASTICIMPERMEABLE LINER
4:110"
*MODIFIED FROMSTANDARD
7' LIMITS OF STRUCTURAL SOIL
PL
LANDSCAPE
AREA
PLSA 3628J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\REPORTS\SWQMP\DISCRETIONARY\ATTACHMENT 2 - HMP\ATT_2A-HMP.DWG PLSA 3628J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\REPORTS\SWQMP\DISCRETIONARY\ATTACHMENT 2 - HMP\ATT_2A-HMP.DWG
TYPICAL SECTION - BIOFILTRATION BASIN BMP-1
SCALE: NOT TO SCALE
TYPICAL SECTION - BIOFILTRATION BASIN BMP-1
SCALE: NOT TO SCALE
PLAN VIEW - CURB CUT @ TREE WELL
SDC GS DS GS-5.01
SCALE: NOT TO SCALE
ATTACHMENT 2A - HMP EXHIBIT
MARTIN RESIDENCE - VACANT LOT ON BUENA
VISTA CIRCLE
CITY OF CARLSBAD
SHEET 2 OF 2
TYPICAL DETAIL - FLOW CONTROL ORIFICE PLATE
NOT TO SCALE
TYPICAL DETAIL - MODIFIED PCC CUTOFF WALL
NOT TO SCALE
SECTION A-A-TREE WELL W/O GRATE MODIFIED
SDC GS DS SD-1.04A+GS-1.04B
SCALE: NOT TO SCALE
SECTION A-A-TREE WELL W/O GRATE
MODIFIED SDC GS DS SD-1.04A+GS-1.04B
SCALE: NOT TO SCALE
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PASCO LARET SUITER
I J.\SSOllCIJ.\llES
San Diego I Solana Beach I Orange County
Phone 858.259.8212 I www.plsaengineering.com
3628 Martin
11/1/2022
SWMM MODEL SCHEMATICS
PRE-DEVELOPMENT MODEL POST-PROJECT MODEL
J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\REPORTS\SWQMP\Discretionary\SWMM\Output\3628_SWMM_Schematics.xlsx
E
'
3628 Martin
11/1/2022
DMA Area (ac)
Width
(Area/Flow
Length) (ft)% Slope
%
Impervious % "B" Soils
% "C"
Soils
Weighted
Conductivity
(in/hr):
Weighted
Suction
Head (in):
Weighted
Initial
Deficit:N-perv
1 0.294 88 1.0%0%100%0%0.200 3.000 0.320 0.08
Total:0.294
DMA Area (ac)
Width
(Area/Flow
Length) (ft)
%
Impervious % Slope % "B" Soils
% "C"
Soils
Weighted
Conductivity
(in/hr):
Weighted
Suction
Head (in):
Weighted
Initial
Deficit:N-perv
1 0.252 343 80%1.0%0%100%0.100 6.000 0.310 0.06
BMP-1 0.02204 48 0%0.0%100%0%0.200 3.000 0.320 0.06
Total:0.274
B:0.2 in/hr B:3 in B:0.32
C:0.1 in/hr C:6 in C:0.31
Suction Head:Initial DeficitConductivity:
POC-1
PRE-DEVELOPMENT
POST-PROJECT
J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\REPORTS\SWQMP\Discretionary\SWMM\3628_SWMM_Input.xlsx
POC-1
[TITLE]
;;Project Title/Notes
3628 Martin
Pre-Development Condition
[OPTIONS]
;;Option Value
FLOW_UNITS CFS
INFILTRATION GREEN_AMPT
FLOW_ROUTING KINWAVE
LINK_OFFSETS DEPTH
MIN_SLOPE 0
ALLOW_PONDING NO
SKIP_STEADY_STATE NO
START_DATE 08/28/1951
START_TIME 05:00:00
REPORT_START_DATE 08/28/1951
REPORT_START_TIME 05:00:00
END_DATE 05/23/2008
END_TIME 23:00:00
SWEEP_START 01/01
SWEEP_END 12/31
DRY_DAYS 0
REPORT_STEP 01:00:00
WET_STEP 00:15:00
DRY_STEP 04:00:00
ROUTING_STEP 0:01:00
RULE_STEP 00:00:00
INERTIAL_DAMPING PARTIAL
NORMAL_FLOW_LIMITED BOTH
FORCE_MAIN_EQUATION H-W
VARIABLE_STEP 0.75
LENGTHENING_STEP 0
MIN_SURFAREA 12.557
MAX_TRIALS 8
HEAD_TOLERANCE 0.005
SYS_FLOW_TOL 5
LAT_FLOW_TOL 5
MINIMUM_STEP 0.5
THREADS 1
[EVAPORATION]
;;Data Source Parameters
;;-------------- ----------------
MONTHLY .06 .08 .11 .15 .17 .19 .19 .18 .15 .11 .08 .06
DRY_ONLY NO
[RAINGAGES]
;;Name Format Interval SCF Source
POC-1
;;-------------- --------- ------ ------ ----------
Oceanside INTENSITY 1:00 1.0 TIMESERIES Oceanside
[SUBCATCHMENTS]
;;Name Rain Gage Outlet Area %Imperv Width %Slope CurbLen SnowPack
;;-------------- ---------------- ---------------- -------- -------- -------- -------- -------- ----------------
DMA-1 Oceanside POC-1 0.294 0 88 1 0
[SUBAREAS]
;;Subcatchment N-Imperv N-Perv S-Imperv S-Perv PctZero RouteTo PctRouted
;;-------------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
DMA-1 0.012 0.08 0.05 0.1 25 OUTLET
[INFILTRATION]
;;Subcatchment Suction Ksat IMD
;;-------------- ---------- ---------- ----------
DMA-1 3 0.2 .32
[OUTFALLS]
;;Name Elevation Type Stage Data Gated Route To
;;-------------- ---------- ---------- ---------------- -------- ----------------
;Basin 1
POC-1 0 FREE NO
[TIMESERIES]
;;Name Date Time Value
;;-------------- ---------- ---------- ----------
Oceanside FILE "J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-
CARLSBAD\CIVIL\REPORTS\SWQMP\Discretionary\SWMM\Rainfall\oceanside.dat"
[REPORT]
;;Reporting Options
SUBCATCHMENTS ALL
NODES ALL
LINKS ALL
[TAGS]
[MAP]
DIMENSIONS 0.000 0.000 10000.000 10000.000
Units None
[COORDINATES]
;;Node X-Coord Y-Coord
;;-------------- ------------------ ------------------
POC-1 785.219 2528.868
[VERTICES]
;;Link X-Coord Y-Coord
;;-------------- ------------------ ------------------
POC-1
[Polygons]
;;Subcatchment X-Coord Y-Coord
;;-------------- ------------------ ------------------
DMA-1 762.125 5369.515
[SYMBOLS]
;;Gage X-Coord Y-Coord
;;-------------- ------------------ ------------------
Oceanside 747.985 6731.113
POC-1
[TITLE]
;;Project Title/Notes
3628 Martin
Post-Project Condition
[OPTIONS]
;;Option Value
FLOW_UNITS CFS
INFILTRATION GREEN_AMPT
FLOW_ROUTING KINWAVE
LINK_OFFSETS DEPTH
MIN_SLOPE 0
ALLOW_PONDING NO
SKIP_STEADY_STATE NO
START_DATE 08/28/1951
START_TIME 05:00:00
REPORT_START_DATE 08/28/1951
REPORT_START_TIME 05:00:00
END_DATE 05/23/2008
END_TIME 23:00:00
SWEEP_START 01/01
SWEEP_END 12/31
DRY_DAYS 0
REPORT_STEP 01:00:00
WET_STEP 00:15:00
DRY_STEP 04:00:00
ROUTING_STEP 0:01:00
RULE_STEP 00:00:00
INERTIAL_DAMPING PARTIAL
NORMAL_FLOW_LIMITED BOTH
FORCE_MAIN_EQUATION H-W
VARIABLE_STEP 0.75
LENGTHENING_STEP 0
MIN_SURFAREA 12.557
MAX_TRIALS 8
HEAD_TOLERANCE 0.005
SYS_FLOW_TOL 5
LAT_FLOW_TOL 5
MINIMUM_STEP 0.5
THREADS 1
[EVAPORATION]
;;Data Source Parameters
;;-------------- ----------------
MONTHLY .06 .08 .11 .15 .17 .19 .19 .18 .15 .11 .08 .06
DRY_ONLY NO
[RAINGAGES]
;;Name Format Interval SCF Source
POC-1
;;-------------- --------- ------ ------ ----------
Oceanside INTENSITY 1:00 1.0 TIMESERIES Oceanside
[SUBCATCHMENTS]
;;Name Rain Gage Outlet Area %Imperv Width %Slope CurbLen SnowPack
;;-------------- ---------------- ---------------- -------- -------- -------- -------- -------- ----------------
DMA-1 Oceanside BMP-1 0.252 80 343 1 0
BMP-1 Oceanside POC-1 0.02204 0 48 0 0
[SUBAREAS]
;;Subcatchment N-Imperv N-Perv S-Imperv S-Perv PctZero RouteTo PctRouted
;;-------------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
DMA-1 0.012 0.06 0.05 0.1 25 OUTLET
BMP-1 0.012 0.06 0.05 0.1 25 OUTLET
[INFILTRATION]
;;Subcatchment Suction Ksat IMD
;;-------------- ---------- ---------- ----------
DMA-1 6 .1 .31
BMP-1 3 0.2 .32
[LID_CONTROLS]
;;Name Type/Layer Parameters
;;-------------- ---------- ----------
BMP-1 BC
BMP-1 SURFACE 12 0 0 0 5
BMP-1 SOIL 20 0.4 0.2 0.1 5 5 1.5
BMP-1 STORAGE 10 0.67 0 0
BMP-1 DRAIN 0.0621 0.5 3 6 0 0
[LID_USAGE]
;;Subcatchment LID Process Number Area Width InitSat FromImp ToPerv RptFile DrainTo
FromPerv
;;-------------- ---------------- ------- ---------- ---------- ---------- ---------- ---------- ------------------------ ------------
---- ----------
BMP-1 BMP-1 1 960.06 0 0 100 0 * *
0
[OUTFALLS]
;;Name Elevation Type Stage Data Gated Route To
;;-------------- ---------- ---------- ---------------- -------- ----------------
;Basin 1
POC-1 0 FREE NO
[TIMESERIES]
;;Name Date Time Value
;;-------------- ---------- ---------- ----------
Oceanside FILE "J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-
CARLSBAD\CIVIL\REPORTS\SWQMP\Discretionary\SWMM\Rainfall\oceanside.dat"
[REPORT]
POC-1
;;Reporting Options
SUBCATCHMENTS ALL
NODES ALL
LINKS ALL
[TAGS]
[MAP]
DIMENSIONS 0.000 0.000 10000.000 10000.000
Units None
[COORDINATES]
;;Node X-Coord Y-Coord
;;-------------- ------------------ ------------------
POC-1 426.667 640.000
[VERTICES]
;;Link X-Coord Y-Coord
;;-------------- ------------------ ------------------
[Polygons]
;;Subcatchment X-Coord Y-Coord
;;-------------- ------------------ ------------------
DMA-1 392.610 5346.420
BMP-1 480.000 3213.333
[SYMBOLS]
;;Gage X-Coord Y-Coord
;;-------------- ------------------ ------------------
Oceanside 415.704 7170.901
SWMM OUTPUT REPORT PRE-DEVELOPMENT CONDITION
J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-
CARLSBAD\CIVIL\REPORTS\SWQMP\Discretionary\SWMM\Output\3628_PreProject_SWMM_results.docx
EPA STORM WATER MANAGEMENT MODEL - VERSION 5.1 (Build 5.1.013)
--------------------------------------------------------------
3628 Martin
Pre-Development Condition
*********************************************************
NOTE: The summary statistics displayed in this report are
based on results found at every computational time step,
not just on results from each reporting time step.
*********************************************************
****************
Analysis Options
****************
Flow Units ............... CFS
Process Models:
Rainfall/Runoff ........ YES
RDII ................... NO
Snowmelt ............... NO
Groundwater ............ NO
Flow Routing ........... NO
Water Quality .......... NO
Infiltration Method ...... GREEN_AMPT
Starting Date ............ 08/28/1951 05:00:00
Ending Date .............. 05/23/2008 23:00:00
Antecedent Dry Days ...... 0.0
Report Time Step ......... 01:00:00
Wet Time Step ............ 00:15:00
Dry Time Step ............ 04:00:00
************************** Volume Depth
Runoff Quantity Continuity acre-feet inches
************************** --------- -------
Total Precipitation ...... 16.540 675.090
Evaporation Loss ......... 0.052 2.105
Infiltration Loss ........ 16.058 655.412
Surface Runoff ........... 0.469 19.148
Final Storage ............ 0.000 0.000
Continuity Error (%) ..... -0.233
************************** Volume Volume
Flow Routing Continuity acre-feet 10^6 gal
************************** --------- ---------
Dry Weather Inflow ....... 0.000 0.000
Wet Weather Inflow ....... 0.469 0.153
Groundwater Inflow ....... 0.000 0.000
RDII Inflow .............. 0.000 0.000
External Inflow .......... 0.000 0.000
External Outflow ......... 0.469 0.153
SWMM OUTPUT REPORT PRE-DEVELOPMENT CONDITION
J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-
CARLSBAD\CIVIL\REPORTS\SWQMP\Discretionary\SWMM\Output\3628_PreProject_SWMM_results.docx
Flooding Loss ............ 0.000 0.000
Evaporation Loss ......... 0.000 0.000
Exfiltration Loss ........ 0.000 0.000
Initial Stored Volume .... 0.000 0.000
Final Stored Volume ...... 0.000 0.000
Continuity Error (%) ..... 0.000
***************************
Subcatchment Runoff Summary
***************************
------------------------------------------------------------------------------------------------------------------------------
Total Total Total Total Imperv Perv Total Total Peak Runoff
Precip Runon Evap Infil Runoff Runoff Runoff Runoff Runoff Coeff
Subcatchment in in in in in in in 10^6 gal CFS
------------------------------------------------------------------------------------------------------------------------------
DMA-1 675.09 0.00 2.11 655.41 0.00 19.15 19.15 0.15 0.29 0.028
Analysis begun on: Tue Nov 1 10:13:47 2022
Analysis ended on: Tue Nov 1 10:14:26 2022
Total elapsed time: 00:00:39
SWMM OUTPUT REPORT POST-PROJECT CONDITION
J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\REPORTS\SWQMP\Discretionary\SWMM\Output\3628 PostProject
SWMM_results.docx
EPA STORM WATER MANAGEMENT MODEL - VERSION 5.1 (Build 5.1.013)
--------------------------------------------------------------
3628 Martin
Post-Project Condition
*********************************************************
NOTE: The summary statistics displayed in this report are
based on results found at every computational time step,
not just on results from each reporting time step.
*********************************************************
****************
Analysis Options
****************
Flow Units ............... CFS
Process Models:
Rainfall/Runoff ........ YES
RDII ................... NO
Snowmelt ............... NO
Groundwater ............ NO
Flow Routing ........... NO
Water Quality .......... NO
Infiltration Method ...... GREEN_AMPT
Starting Date ............ 08/28/1951 05:00:00
Ending Date .............. 05/23/2008 23:00:00
Antecedent Dry Days ...... 0.0
Report Time Step ......... 01:00:00
Wet Time Step ............ 00:15:00
Dry Time Step ............ 04:00:00
************************** Volume Depth
Runoff Quantity Continuity acre-feet inches
************************** --------- -------
Initial LID Storage ...... 0.004 0.161
Total Precipitation ...... 15.417 675.090
Evaporation Loss ......... 3.512 153.793
Infiltration Loss ........ 2.583 113.123
Surface Runoff ........... 0.252 11.018
LID Drainage ............. 9.288 406.721
Final Storage ............ 0.005 0.223
Continuity Error (%) ..... -1.426
************************** Volume Volume
Flow Routing Continuity acre-feet 10^6 gal
************************** --------- ---------
Dry Weather Inflow ....... 0.000 0.000
Wet Weather Inflow ....... 9.540 3.109
Groundwater Inflow ....... 0.000 0.000
RDII Inflow .............. 0.000 0.000
SWMM OUTPUT REPORT POST-PROJECT CONDITION
J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\REPORTS\SWQMP\Discretionary\SWMM\Output\3628 PostProject
SWMM_results.docx
External Inflow .......... 0.000 0.000
External Outflow ......... 9.540 3.109
Flooding Loss ............ 0.000 0.000
Evaporation Loss ......... 0.000 0.000
Exfiltration Loss ........ 0.000 0.000
Initial Stored Volume .... 0.000 0.000
Final Stored Volume ...... 0.000 0.000
Continuity Error (%) ..... 0.000
***************************
Subcatchment Runoff Summary
***************************
------------------------------------------------------------------------------------------------------------------------------
Total Total Total Total Imperv Perv Total Total Peak Runoff
Precip Runon Evap Infil Runoff Runoff Runoff Runoff Runoff Coeff
Subcatchment in in in in in in in 10^6 gal CFS
------------------------------------------------------------------------------------------------------------------------------
DMA-1 675.09 0.00 80.79 123.02 469.55 12.19 481.73 3.30 0.30 0.714
BMP-1 675.09 5507.97 988.51 0.00 0.00 0.00 5194.06 3.11 0.32 0.840
***********************
LID Performance Summary
***********************
--------------------------------------------------------------------------------------------------------------------
Total Evap Infil Surface Drain Initial Final Continuity
Inflow Loss Loss Outflow Outflow Storage Storage Error
Subcatchment LID Control in in in in in in in %
--------------------------------------------------------------------------------------------------------------------
BMP-1 BMP-1 6183.06 988.55 0.00 137.00 5057.27 2.00 2.40 -0.00
Analysis begun on: Tue Nov 1 10:20:54 2022
Analysis ended on: Tue Nov 1 10:21:32 2022
Total elapsed time: 00:00:38
POC-1
Peak Flow Frequency Summary
Return Period Pre-development Qpeak
(cfs)
Post-project - Mitigated Q
(cfs)
LF = 0.1xQ2 0.009 0.001
2-year 0.087 0.009
5-year 0.138 0.077
10-year 0.184 0.120
J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\REPORTS\SWQMP\Discretionary\SWMM\3628 SWMM_PostProcessing.xlsx
0.000
0.020
0.040
0.060
0.080
0.100
0.120
0.140
0.160
0.180
0.200
012345678910
Pe
a
k
F
l
o
w
i
n
c
f
s
Return Period in Years
POC-1
Peak Flow Frequency Curves
Pre-project Qpeak
Post-project Mitigated Qpeak
I I I , 1 1 -
,J I
I '
J r J
~ ./' I ,~I
I ,~ ~ .JI --d ~ ~
-0-~.,_ ~
I .,. -1 I
I I I ~ ~ ~ ~
I I -J,.11' JP
I ., I ...-t::t"""' I ---. rt --K ----.... IJ -1:
I ~.i:
I -_,. ,,,,
.,,,. -7 .,,,. i.--_,.
.... ...-1 .... .,,,.
l..Cl --i.--
~
Low-flow Threshold:10%POC-1
0.1xQ2 (Pre):0.009 cfs
Q10 (Pre):0.184 cfs
Ordinate #:100
Incremental Q (Pre):0.00175 cfs
Total Hourly Data:497370 hours The proposed BMP:PASSED
Permavoid Layer Pre-project Flow
(cfs)Pre-project Hours Pre-project %
Time Exceeding
Post-project %
Time Exceeding Percentage Pass/Fail
0 0.009 129 2.59E-04 93 1.87E-04 72%Pass
1 0.010 120 2.41E-04 90 1.81E-04 75%Pass
2 0.012 115 2.31E-04 86 1.73E-04 75%Pass
3 0.014 113 2.27E-04 85 1.71E-04 75%Pass
4 0.016 111 2.23E-04 81 1.63E-04 73%Pass
5 0.017 104 2.09E-04 73 1.47E-04 70%Pass
6 0.019 104 2.09E-04 67 1.35E-04 64%Pass
7 0.021 99 1.99E-04 64 1.29E-04 65%Pass
8 0.023 92 1.85E-04 45 9.05E-05 49%Pass
9 0.024 91 1.83E-04 45 9.05E-05 49%Pass
10 0.026 90 1.81E-04 44 8.85E-05 49%Pass
11 0.028 87 1.75E-04 42 8.44E-05 48%Pass
12 0.030 85 1.71E-04 41 8.24E-05 48%Pass
13 0.031 79 1.59E-04 41 8.24E-05 52%Pass
14 0.033 67 1.35E-04 41 8.24E-05 61%Pass
15 0.035 65 1.31E-04 41 8.24E-05 63%Pass
16 0.037 63 1.27E-04 39 7.84E-05 62%Pass
17 0.038 63 1.27E-04 36 7.24E-05 57%Pass
18 0.040 62 1.25E-04 36 7.24E-05 58%Pass
19 0.042 62 1.25E-04 34 6.84E-05 55%Pass
20 0.044 57 1.15E-04 34 6.84E-05 60%Pass
21 0.045 55 1.11E-04 32 6.43E-05 58%Pass
22 0.047 55 1.11E-04 28 5.63E-05 51%Pass
23 0.049 54 1.09E-04 26 5.23E-05 48%Pass
24 0.051 53 1.07E-04 22 4.42E-05 42%Pass
25 0.052 53 1.07E-04 21 4.22E-05 40%Pass
26 0.054 52 1.05E-04 20 4.02E-05 38%Pass
27 0.056 52 1.05E-04 20 4.02E-05 38%Pass
28 0.058 49 9.85E-05 20 4.02E-05 41%Pass
29 0.059 47 9.45E-05 20 4.02E-05 43%Pass
30 0.061 46 9.25E-05 18 3.62E-05 39%Pass
31 0.063 44 8.85E-05 18 3.62E-05 41%Pass
32 0.065 43 8.65E-05 18 3.62E-05 42%Pass
33 0.066 42 8.44E-05 18 3.62E-05 43%Pass
34 0.068 42 8.44E-05 18 3.62E-05 43%Pass
35 0.070 39 7.84E-05 17 3.42E-05 44%Pass
36 0.072 38 7.64E-05 15 3.02E-05 39%Pass
37 0.073 38 7.64E-05 15 3.02E-05 39%Pass
38 0.075 38 7.64E-05 14 2.81E-05 37%Pass
39 0.077 37 7.44E-05 14 2.81E-05 38%Pass
40 0.079 37 7.44E-05 14 2.81E-05 38%Pass
41 0.080 36 7.24E-05 14 2.81E-05 39%Pass
42 0.082 35 7.04E-05 14 2.81E-05 40%Pass
43 0.084 34 6.84E-05 13 2.61E-05 38%Pass
44 0.086 34 6.84E-05 13 2.61E-05 38%Pass
45 0.087 32 6.43E-05 13 2.61E-05 41%Pass
46 0.089 32 6.43E-05 13 2.61E-05 41%Pass
47 0.091 30 6.03E-05 13 2.61E-05 43%Pass
48 0.093 28 5.63E-05 13 2.61E-05 46%Pass
49 0.094 26 5.23E-05 13 2.61E-05 50%Pass
50 0.096 26 5.23E-05 13 2.61E-05 50%Pass
51 0.098 26 5.23E-05 12 2.41E-05 46%Pass
52 0.100 26 5.23E-05 12 2.41E-05 46%Pass
53 0.101 24 4.83E-05 9 1.81E-05 38%Pass
54 0.103 24 4.83E-05 8 1.61E-05 33%Pass
II II
Permavoid Layer Pre-project Flow
(cfs)Pre-project Hours Pre-project %
Time Exceeding
Post-project %
Time Exceeding Percentage Pass/Fail
55 0.105 21 4.22E-05 8 1.61E-05 38%Pass
56 0.107 21 4.22E-05 8 1.61E-05 38%Pass
57 0.108 20 4.02E-05 8 1.61E-05 40%Pass
58 0.110 20 4.02E-05 8 1.61E-05 40%Pass
59 0.112 18 3.62E-05 8 1.61E-05 44%Pass
60 0.114 17 3.42E-05 8 1.61E-05 47%Pass
61 0.115 17 3.42E-05 8 1.61E-05 47%Pass
62 0.117 17 3.42E-05 8 1.61E-05 47%Pass
63 0.119 17 3.42E-05 7 1.41E-05 41%Pass
64 0.121 17 3.42E-05 6 1.21E-05 35%Pass
65 0.122 17 3.42E-05 6 1.21E-05 35%Pass
66 0.124 17 3.42E-05 6 1.21E-05 35%Pass
67 0.126 16 3.22E-05 6 1.21E-05 38%Pass
68 0.128 16 3.22E-05 6 1.21E-05 38%Pass
69 0.129 16 3.22E-05 6 1.21E-05 38%Pass
70 0.131 15 3.02E-05 6 1.21E-05 40%Pass
71 0.133 15 3.02E-05 5 1.01E-05 33%Pass
72 0.135 15 3.02E-05 5 1.01E-05 33%Pass
73 0.136 15 3.02E-05 5 1.01E-05 33%Pass
74 0.138 13 2.61E-05 5 1.01E-05 38%Pass
75 0.140 12 2.41E-05 5 1.01E-05 42%Pass
76 0.142 12 2.41E-05 5 1.01E-05 42%Pass
77 0.143 11 2.21E-05 5 1.01E-05 45%Pass
78 0.145 10 2.01E-05 5 1.01E-05 50%Pass
79 0.147 10 2.01E-05 5 1.01E-05 50%Pass
80 0.149 9 1.81E-05 5 1.01E-05 56%Pass
81 0.150 9 1.81E-05 5 1.01E-05 56%Pass
82 0.152 9 1.81E-05 5 1.01E-05 56%Pass
83 0.154 8 1.61E-05 5 1.01E-05 63%Pass
84 0.156 8 1.61E-05 5 1.01E-05 63%Pass
85 0.157 7 1.41E-05 5 1.01E-05 71%Pass
86 0.159 7 1.41E-05 5 1.01E-05 71%Pass
87 0.161 6 1.21E-05 5 1.01E-05 83%Pass
88 0.163 6 1.21E-05 5 1.01E-05 83%Pass
89 0.164 6 1.21E-05 5 1.01E-05 83%Pass
90 0.166 6 1.21E-05 5 1.01E-05 83%Pass
91 0.168 6 1.21E-05 5 1.01E-05 83%Pass
92 0.170 6 1.21E-05 5 1.01E-05 83%Pass
93 0.171 6 1.21E-05 5 1.01E-05 83%Pass
94 0.173 6 1.21E-05 5 1.01E-05 83%Pass
95 0.175 6 1.21E-05 5 1.01E-05 83%Pass
96 0.177 5 1.01E-05 4 8.04E-06 80%Pass
97 0.178 5 1.01E-05 3 6.03E-06 60%Pass
98 0.180 5 1.01E-05 3 6.03E-06 60%Pass
99 0.182 5 1.01E-05 3 6.03E-06 60%Pass
100 0.184 5 1.01E-05 3 6.03E-06 60%Pass
0.000
0.020
0.040
0.060
0.080
0.100
0.120
0.140
0.160
0.180
0.200
1.0E-06 1.0E-05 1.0E-04 1.0E-03 1.0E-02
Fl
o
w
(
c
f
s
)
% Time Exceeding
POC-1
Flow Duration Curve
[Pre vs. Post (Mitigated)]
Pre-project Q
Post-project (Mitigated) Q
I
t -
I I
I ~~ I I
I I 7 1 I ... b
..._I ~ ~
I z ~ ---........
--1:r-
'L ~
9, 11
I ij.,
~ I ii l ~
I ~ t_.~
POC-1
BMP-1
PARAMETER ABBREV.
Ponding Depth PD 12.0 in
Bioretention Soil Layer S 20 in
Gravel Layer G 10 in
3.5 ft
42 in
Orifice Coefficient cg 0.6 --
Low Flow Orifice Diameter D 0.425 in
Drain exponent n 0.5 --
Flow Rate (volumetric)Q 0.009 cfs
Ponding Depth Surface Area APD 960 ft2
AS, AG 960 ft2
AS, AG 0.0220 ac
Porosity of Bioretention Soil n 0.40 -
Flow Rate (per unit area)q 0.996 in/hr
Effective Ponding Depth PDeff 12.00 in
Flow Coefficient C 0.0621 --
Bio-Retention Cell
LID BMP
Bioretention Surface Area
TOTAL
SWMM Model Flow Coefficient Calculation and
Effective Ponding Depth Calculation
Drawdown Calculation for BMP-1
Project Name Martin
Project No 3628
Surface Drawdown Time: 31.3 hr
Surface Area 960 sq ft
Underdrain Orifice Diameter:
in 0.425 in
C:0.6
Surface Ponding (to invert of lowest
surface discharge opening in outlet
structure):
1
ft
Amended Soil Depth: 1.67 ft
Gravel Depth: 0.583 ft
Orifice Q =0.009 cfs
Effective Depth 18.8064 in
Infiltration controlled by orifice 0.384 in/hr
Manning’s n Values for Overland Flow1
The BMP Design Manuals within the County of San Diego allow for a land surface description other than
short prairie grass to be used for hydromodification BMP design only if documentation provided is
consistent with Table A.6 of the SWMM 5 User’s Manual.
In January 2016, the EPA released the SWMM Reference Manual Volume I – Hydrology (SWMM
Hydrology Reference Manual). The SWMM Hydrology Reference Manual complements the SWMM 5
User’s Manual by providing an in-depth description of the program’s hydrologic components. Table 3-5
of the SWMM Hydrology Reference Manual expounds upon Table A.6 of the SWMM 5 User’s Manual by
providing Manning’s n values for additional overland flow surfaces. Therefore, in order to provide
SWMM users with a wider range of land surfaces suitable for local application and to provide
Copermittees with confidence in the design parameters, we recommend using the values published by
Yen and Chow in Table 3-5 of the EPA SWMM Reference Manual Volume I – Hydrology. The values are
provided in the table below:
Overland Surface Manning value (n)
Smooth asphalt pavement 0.010
Smooth impervious surface 0.011
Tar and sand pavement 0.012
Concrete pavement 0.014
Rough impervious surface 0.015
Smooth bare packed soil 0.017
Moderate bare packed soil 0.025
Rough bare packed soil 0.032
Gravel soil 0.025
Mowed poor grass 0.030
Average grass, closely clipped sod 0.040
Pasture 0.040
Timberland 0.060
Dense grass 0.060
Shrubs and bushes 0.080
Land Use
Business 0.014
Semibusiness 0.022
Industrial 0.020
Dense residential 0.025
Suburban residential 0.030
Parks and lawns 0.040
1Content summarized from Improving Accuracy in Continuous Simulation Modeling: Guidance for
Selecting Pervious Overland Flow Manning’s n Values in the San Diego Region (TRWE, 2016).
TORY R. WALKER ENGINEERING
RELIABLE SOLUTIONS IN WATER RESOURCES
WATERSHED, FLOODPLAIN e? STORM WATER MANAGEMENT · RIVER RESTORATION· FLOOD FACILITIES DESIGN· SEDIMENT e? EROSION
122 CIVIC CENTER DRIVE, SUITE 206, VISTA CA 92084 • 760-414-9212 • TRWENGINEERING.COM
Hydrologic Soil Group—San Diego County Area, California
Natural ResourcesConservation Service Web Soil SurveyNational Cooperative Soil Survey 12/2/2021Page 1 of 4
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467180 467190 467200 467210 467220 467230 467240 467250 467260 467270 467280 467290
467180 467190 467200 467210 467220 467230 467240 467250 467260 467270 467280 467290
33° 10' 2'' N
11
7
°
2
1
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7
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W
33° 10' 2'' N
11
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2
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33° 10' 0'' N
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N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 11N WGS84
0 25 50 100 150Feet
0 5 10 20 30Meters
Map Scale: 1:560 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
USDA =
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Rating Polygons
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Lines
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Points
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at 1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map measurements.
Source of Map: Natural Resources Conservation ServiceWeb Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as of the version date(s) listed below.
Soil Survey Area: San Diego County Area, CaliforniaSurvey Area Data: Version 16, Sep 13, 2021
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jan 24, 2020—Feb
12, 2020
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.
Hydrologic Soil Group—San Diego County Area, California
Natural ResourcesConservation Service Web Soil SurveyNational Cooperative Soil Survey 12/2/2021Page 2 of 4USDA =
□
D
D
D
D
D
D
D
D
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,,..,,,.
□
■
■
□
□
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~
•
Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
LG-W Lagoon water 0.7 42.9%
MlC Marina loamy coarse sand, 2 to 9 percent
slopes
B 0.2 12.7%
TeF Terrace escarpments 0.7 44.5%
Totals for Area of Interest 1.6 100.0%
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive
precipitation from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when
thoroughly wet. These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in
their natural condition are in group D are assigned to dual classes.
Hydrologic Soil Group—San Diego County Area, California
Natural ResourcesConservation Service Web Soil SurveyNational Cooperative Soil Survey 12/2/2021Page 3 of 4USDA =
Appendix G: Guidance for Continuous Simulation and Hydromodification Management Sizing
Factors
G-4 Sept. 2021
Zone Map"), prepared by California Department of Water Resources, dated January 2012. The CIMIS
ETo Zone Map is available from www.cimis.gov, and is provided in this Appendix as Figure G.1-2.
Determine the appropriate reference evapotranspiration zone for the project from the CIMIS ETo
Zone Map. The monthly average reference evapotranspiration values are provided below in Table
G.1-1.
Figure G.1-2: California Irrigation Management Information System "Reference Evapotranspiration Zones"
SAN BERNARDINO t
9
117/
R
17
V E R S
D I E G 0
16
D E
16
M P E R
18 EL CENTRO
t
18
A L
Appendix G: Guidance for Continuous Simulation and Hydromodification Management Sizing Factors
G-6 Sept. 2021
Table G.1-1: Monthly Average Reference Evapotranspiration by ETo Zone (inches/month and inches/day) for use in SWMM Models for Hydromodification Management Studies in San Diego County
CIMIS Zones 1, 4, 6, 9, and 16 (See CIMIS ETo Zone Map)
January February March April May June July August September October November December
Zone in/month in/month in/month in/month in/month in/month in/month in/month in/month in/month in/month in/month
1 0.93 1.4 2.48 3.3 4.03 4.5 4.65 4.03 3.3 2.48 1.2 0.62
4 1.86 2.24 3.41 4.5 5.27 5.7 5.89 5.58 4.5 3.41 2.4 1.86
6 1.86 2.24 3.41 4.8 5.58 6.3 6.51 6.2 4.8 3.72 2.4 1.86
9 2.17 2.8 4.03 5.1 5.89 6.6 7.44 6.82 5.7 4.03 2.7 1.86
16 1.55 2.52 4.03 5.7 7.75 8.7 9.3 8.37 6.3 4.34 2.4 1.55
January February March April May June July August September October November December
Days 31 28 31 30 31 30 31 31 30 31 30 31
Zone in/day in/day in/day in/day in/day in/day in/day in/day in/day in/day in/day in/day
1 0.030 0.050 0.080 0.110 0.130 0.150 0.150 0.130 0.110 0.080 0.040 0.020
4 0.060 0.080 0.110 0.150 0.170 0.190 0.190 0.180 0.150 0.110 0.080 0.060
6 0.060 0.080 0.110 0.160 0.180 0.210 0.210 0.200 0.160 0.120 0.080 0.060
9 0.070 0.100 0.130 0.170 0.190 0.220 0.240 0.220 0.190 0.130 0.090 0.060
16 0.050 0.090 0.130 0.190 0.250 0.290 0.300 0.270 0.210 0.140 0.080 0.050
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:
√ 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:
√ 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)
√ How to access the structural BMP(s) to inspect and perform maintenance
√ 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)
Manufacturer and part number for proprietary parts of structural BMP(s) when applicable
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.)
√ Recommended equipment to perform maintenance
When applicable, necessary special training or certification requirements for inspection
and maintenance personnel such as confined space entry or hazardous waste management
BMP DESCRIPTION
BMP 1
BIOFILTRATION BASIN ( SF)
ATTACHMENT -3a
BMP MAINTENANCE THRESHOLDS
STORM WATER MANAGEMENT AND DISCHARGE CONTROL MAINTENANCE AGREEMENT APPROVAL NO:
O&M RESPONSIBLE PARTY DESIGNEE: PAMELA KAYE SULLIVAN MARTIN, TRUSTEE OF THE PAMELA KAYE SULLIVAN MARTIN LIVING TRUST
POS~CONSTRUCTTONPERMANENTBMP
OPERATION & MAINTENANCE PROCEDURE DETAILS
MAINTENANCE INDICATORS MAINTENANCE ACTION
ACCUMULATION OF SEDIMENT, LITTER, OR DEBRIS REMOVE AND PROPERLY DISPOSE OF ACCUMULATED MATERIALS, WITHOUT DAMAGE TO THE VEGETATION
POOR VEGETATION ESTABLISHMENT
OVERGROWN VEGETATION
EROSION DUE TO CONCENTRATED IRRIGATION FLOW
EROSION DUE TO CONCENTRATED STORM WATER RUNOFF FLOW
STANDING WATER IN BIOFILTRATIONAREAS
OBSTRUCTED INLET OR OUTLET STRUCTURE
DAMAGE TO INLET OR OUTLET STRUCTURE
MAINTENANCE EQUIPMENT AND ACCESS
USE LANDSCAPE EQUIPMENT FOR MAINTENANCE; ACCESS BMPS FROM THE WESTERLY CORNER OF THE
PRIVATE BACKYARD.
INSPECTION FACILITATION
INSTALL 36" X 36" OUTLET RISER STRUCTURE TO SERVE AS CLEANOUT AND PROVIDE
OBSERVATION ACCESS FOR INSPECTION OF MAINTENANCE THRESHOLDS; MARKING TO BE
PROVIDED ON BMP COMPONENTS TO DETERMINE HOW FULL BMP IS.
RE-SEED, RE-PLANT, OR RE-ESTABLISH VEGETATION PER ORIGINAL PLANS
MOW OR TRIM AS APPROPRIATE, BUT NOT LESS THAT THE DESIGN HEIGHT OF THE VEGETATION PER ORIGINAL PLANS.
REPAIR/RE-SEED/RE-PLANT ERODED AREAS AND ADJUST THE IRRIGATION SYSTEM
REPAIR/RE-SEED/RE-PLANT ERODED AREAS AND MAKE APPROPRIATE CORRECTIVE MEASURES SUCH AS
ADDING STONE AT FLOW ENTRY POINTS OR MINOR RE-GRADING TO RESTORE PROPER DRAINAGE
ACCORDING TO THE ORIGINAL PLAN.
MAKE APPROPRIATE CORRECTIVE MEASURES SUCH AS ADJUSTING IRRIGATION SYSTEM, REMOVING OBSTRUCTION OF
DEBRIS OR INVASIVE VEGETATION, OR CLEANING UNDERDRAINS
CLEAR OBSTRUCTIONS
REPAIR OR REPLACE AS APPLICABLE
MAINTENANCE FREQUENCY
BIOFILTRATION BMP TO BE MAINTAINED ANNUALLY &AS-NEEDED
PASCO LARET SUITER
& A880CIATE8
CIVIL EHINEERINI + LAND PLANNINI + LAND aJRVEYINI
lllllartla BlplMJIDI. Ill.A. 8alaaBIICII.CAat75
p1aUU1t.a121 &UUSM1121,..........._
I.I A l"'\'T"II ,,... IJ"'"\nt"'lll,,J".11,.,n AAA n"T"IAI n, lr-"AIA 1111"\"T"A l"'\ln l"'\A n, t"\n II nl/"\11.111 1nr-nl""'\n"T"t"'lllt"'IIIA./J""'\ll ,ln\nlt"'lll"'\nr-Tll"'\AIA n,11 JI. 'T"'T"Jl./"I IAAr-"AIT",, A.IA IAl'T"A A.lr-"A.ll"'\r-1 A nnr-a.,n,v ,,JI. l,IJI. IA.l'T"r-AIJI All"'\r-"Tl ,nr-t"'llf '"'' nt"'lo nJA//"'\ DI C'A ?a'>O
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 scenarios 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,
without damage to the vegetation or compaction of the
media layer.
• Inspect monthly. If the BMP is 25% full* or more in
one month, increase inspection frequency to monthly
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
outlet structures
Repair or replace as applicable • Inspect annually.
• Maintenance when needed.
Poor vegetation establishment Re-seed, re-plant, or re-establish vegetation per original
plans.
• Inspect monthly.
• Maintenance when needed.
Dead or diseased vegetation Remove dead or diseased vegetation, re-seed, re-plant,
or re-establish vegetation per original plans.
• Inspect monthly.
• 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
removed
Remove decomposed fraction and top off with fresh
mulch to a total depth of 3 inches.
• Inspect monthly.
• Replenish mulch annually, or more frequently when
needed based on inspection.
*“25% full” is defined as ¼ 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 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
irrigation system. • Inspect monthly.
• Maintenance when needed.
Erosion due to concentrated storm water runoff flow Repair/re-seed/re-plant eroded areas, and make
appropriate 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 Engineer] shall be contacted prior to any additional
repairs or reconstruction.
• Inspect after every 0.5-inch or larger storm event. If
erosion due to storm water flow has been observed,
increase inspection frequency to after every 0.1-inch
or larger storm event.
• Maintenance when needed. 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.
Standing water in BMP for longer than 24 hours
following a storm event
Surface ponding longer than approximately 24 hours
following a storm event may be detrimental to
vegetation health
Make appropriate corrective measures such as adjusting
irrigation system, removing obstructions of debris or
invasive vegetation, clearing underdrains, or
repairing/replacing clogged or compacted soils.
• Inspect monthly and after every 0.5-inch or larger
storm event. If standing water is observed, increase
inspection frequency to after every 0.1-inch or larger
storm event.
• Maintenance when needed.
Presence of mosquitos/larvae
For images of egg rafts, larva, pupa, and adult
mosquitos, see
http://www.mosquito.org/biology
If mosquitos/larvae are observed: first, immediately
remove any standing water by dispersing to nearby
landscaping; second, make corrective measures as
applicable to restore BMP drainage to prevent standing
water.
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.
• Inspect monthly and after every 0.5-inch or larger
storm event. If mosquitos are observed, increase
inspection frequency to after every 0.1-inch or larger
storm event.
• Maintenance when needed.
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 11
January 12, 2017
BF-1
Biofiltration
References
American Mosquito Control Association.
http://www.mosquito.org/
California Storm Water Quality Association (CASQA). 2003. Municipal BMP Handbook.
https://www.casqa.org/resources/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&Itemid=220
BF-1 Page 5 of 11
January 12, 2017
BF-1
Biofiltration
Page Intentionally Blank for Double-Sided Printing
BF-1 Page 6 of 11
January 12, 2017
BF-1
Biofiltration
Date: Inspector: BMP ID 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
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Remove and properly dispose of
accumulated materials, without damage
to the vegetation
☐ If sediment, litter, or debris accumulation
exceeds 25% of the surface ponding
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.
☐ Other / Comments:
Poor vegetation establishment
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Re-seed, re-plant, or re-establish
vegetation per original plans
☐ Other / Comments:
*“25% full” is defined as ¼ 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
I I
I
BF-1
Biofiltration
Date: Inspector: 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
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Remove dead or diseased vegetation, re-
seed, re-plant, or re-establish vegetation
per original plans
☐ Other / Comments:
Overgrown vegetation
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Mow or trim as appropriate
☐ Other / Comments:
2/3 of mulch has decomposed, or mulch has
been removed
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Remove decomposed fraction and top off
with fresh mulch to a total depth of 3
inches
☐ Other / Comments:
BF-1 Page 8 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 3 of 5
Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted
Erosion due to concentrated irrigation flow
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Repair/re-seed/re-plant eroded areas and
adjust the irrigation system
☐ Other / Comments:
Erosion due to concentrated storm water runoff
flow
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Repair/re-seed/re-plant eroded areas,
and make appropriate 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 Engineer] shall be contacted
prior to any additional repairs or
reconstruction
☐ 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
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Clear blockage
☐ Other / Comments:
Underdrain clogged (inspect underdrain if
standing water is observed for longer than 24-96
hours following a storm event)
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Clear blockage
☐ Other / Comments:
Damage to structural components such as weirs,
inlet or outlet structures
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Repair or replace as applicable
☐ Other / Comments:
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
hours following a storm event*
Surface ponding longer than approximately 24
hours following a storm event may be
detrimental to vegetation health
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Make appropriate corrective measures
such as adjusting irrigation system,
removing obstructions of debris or
invasive vegetation, clearing
underdrains, or repairing/replacing
clogged or compacted soils
☐ Other / Comments:
Presence of mosquitos/larvae
For images of egg rafts, larva, pupa, and adult
mosquitos, see
http://www.mosquito.org/biology
Maintenance Needed?
☐ YES
☐ NO
☐ N/A
☐ Apply corrective measures to remove
standing water in BMP when standing
water occurs for longer than 24-96
hours following a storm event.**
☐ Other / Comments:
*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-1 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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N 64°00'37" W 276.98'
N 64°01'09" W 266.00'
L=109.92'
D=10°09'28"
BU
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LANDSCAPEDRAINAGESWALE
LA
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6
7
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PLANT MIX PER
LANDSCAPEARCHITECT PLAN PROPOSED 36" X 36" BROOKSBOX WITH GRATED INLET;TOP OF GRATE = PER PLAN
PONDINGDEPTH
PROPOSED 6" GRAVELSTORAGE LAYER OF 3/4"CRUSHED ROCKPROPOSED 4"LAYER OF WASHED3/8" PEA GRAVEL
FG = PERPLAN
PROPOSED 6" PERFORATED PIPETRUNKLINE TO CONNECT TO BROOKS BOXFROM STORAGE LAYER WITH ORIFICEPLATE PER DETAIL THIS SHEET; 41.25 IE
PROPOSED 18"ENGINEERED SOILLAYER;*SEE NOTE BELOW
12"
BOTTOM OF BMPELEV = 41.0
3" LAYERHYDRAULIC MULCH
PROPOSED 4" PVC STORM DRAINOUTLET PIPE FROM BROOKS BOX FORLOW FLOW STORM EVENTS W/ FLOWCONTROL; 41.25 IE
IMPERVIOUS LINERALONG SIDES ANDBOTTOM OF BMP
IMPERVIOUS LINERALONG SIDES ANDBOTTOM OF BMP
ORIFICEPLATEDRILLED TOINSIDE OF
BOX PER
DETAIL THISSHEET
X
X PRIVACY FENCEON RETAININGWALL
X
X PROTECTIVE
RAILING / FALLPROTECTION
PROPOSED 6" PVC STORMDRAIN OUTLET PIPE FROMBROOKS BOX FOR HIGH FLOW
STORM EVENTS; 42.2 IE
6" FREEBOARD
OFFICE PLATE TO RESTRICT FLOW
FOR LOW FLOW STROM EVENTS;
0.425" LOW-FLOW ORIFICE
PL
0.425" LOW FLOW ORIFICE
*BIOFILTRATION "ENGINEERED SOIL" LAYER SHALL BE EVENLY
MIXED COMPOSITION OF WASHED SAND, SANDY LOAM TOPSOIL,AND HUMIC COMPOST. THE MIX SHALL CONTAIN 65% SAND, 20%TOPSOIL, AND 15% COMPOST OR HARDWOOD MULCH INACCORDANCE WITH COUNTY OF SAN DIEGO LID BIOSWALE MEDIABIO65 CUT SHEET.
20' DIAMETER STREET TREE WITH644 CF MIN STRUCTURAL SOIL (7'WIDE X 23' LONG X 4' DEEP)
B B
A
A 7' X 23' LIMIT OFSTRUCTUAL SOIL
LA
LIMITS OF 30 MIL PLASTICIMPERMEABLE LINERAROUND STRUCTURAL SOIL
LA
LA
4" PVC STORM DRAIN
4" PVC STORM DRAIN
MODIFIED PCC HEADWALL PER DETAILTHIS SHEET
MODIFIED PCC HEADWALL PER DETAILTHIS SHEET
SPLASHPAD PER SDC GS
DS GS-5.06
SPLASH
PAD PER SDC GSDS GS-5.06
PROPERTY LINE
PROPERTY LINE
6" SAND FILTERLAYER
ROOT BARRIER
PER SDRSD L-6
30 MIL PLASTICIMPERMEABLE LINER
48" DEEPSTRUCTURAL SOIL*
DEEP ROOT TREEBUBBLER PERSDRSD DWG I-4
UNCOMPACTED SUBGRADE
COMPACTEDSUBGRADE
ROOT
BALL
30 MIL PLASTICIMPERMEABLE LINER
3" MULCH
ADJACENT LANDSCAPEDWITHIN PROPERTYFRONTAGE
COMPACTEDSUBGRADE
4:1
10"
4:1
ADJACENT LANDSCAPEDWITHIN PROPERTYFRONTAGE
ROOT BARRIERPER SDRSD L-6SPLASH
PAD PER SDC GSDS GS-5.06
*MODIFIED FROM STANDARD
23'
SD
MODIFIED PCC CUT OFFWALL SEE DETAIL THISSHEET
MODIFIED PCC CUT OFFWALL SEE DETAIL THIS
SHEET
4" PVC STORMDRAIN
4" PVC STORMDRAIN
SD
SPLASHPAD PER SDC GSDS GS-5.06
LANDSCAPEAREA
COMPACTEDSUBGRADE
COMPACTEDSUBGRADE
6" SANDFILTER LAYER
ROOT BARRIER
PER SDRSD L-6
30 MIL PLASTICIMPERMEABLE LINER
48" DEEPSTRUCTURAL SOIL*
DEEP ROOT TREEBUBBLER PERSDRSD DWG I-4
UNCOMPACTED SUBGRADE
3" MIN MULCHLAYER
ROOTBALL
30 MIL PLASTICIMPERMEABLE LINER
4:110"
*MODIFIED FROMSTANDARD
7' LIMITS OF STRUCTURAL SOIL
PL
LANDSCAPEAREA
INFLOW PIPE FROM
PERMAVOID SYSTEM
(PER PLAN)
LOW-FLOW
ORIFICE (SIZE PERDETAIL SHEET 2)
ORIFICE PLATE: MIN SQUAREDIMENSIONS 1.0 FT GREATERTHAN PIPE DIA. HOT DIPGALVANIZED PLATE AFTER HOLESHAVE BEEN DRILLED; CONNECTTO INSIDE WALL OF OUTLET
STRUCTURE
MIN. 6" (TYP.)
NOTE: ORIFICE AND FLANGECONNECTION TO CONCRETESHALL BE FILLED WITH 30DUROMETER NEOPRENE RING
12"
M
A
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3/8" DIA.HOLE (TYP.)
3"
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20 40 60
GRAPHIC SCALE 1" = 20'
020
PLAN VIEW - SINGLE SHEET BMP
SCALE: 1" = 20'
PLSA 3628J:\ACTIVE JOBS\3628 MARTIN BUENA VISTA CIR-CARLSBAD\CIVIL\DRAWING\GRADING PLANS\3628-CV-BMP.DWG
REVIEWED BY:
DATEINSPECTOR
DATE
"AS BUILT"
ENGINEERING DEPARTMENT
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& ASSOCIATES
Phone 858.259.8212 | www.plsaengineering.com
San Diego | Solana Beach | Orange County
MARTIN RESIDENCE
XX BUENA VISTA CIRCLE
1. THESE BMPS ARE MANDATORY TO BE INSTALLED PER MANUFACTURER'S
RECOMMENDATIONS AND/OR THESE PLANS.
2. NO CHANGES TO THE PROPOSED BMPS ON THIS SHEET WITHOUT PRIOR
APPROVAL FROM THE CITY ENGINEER.
3. NO SUBSTITUTIONS TO THE MATERIAL OR TYPES OR PLANTING TYPES
WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER.
4. NO OCCUPANCY WILL BE GRANTED UNTIL THE CITY INSPECTION STAFF
HAS INSPECTED THIS PROJECT FOR APPROPRIATE BMP CONSTRUCTION
AND INSTALLATION.
BMP NOTES:
PARTY RESPONSIBLE FOR MAINTENANCE:
NAME
ADDRESS
PHONE NO.
CONTACT
PLAN PREPARED BY:
NAME
ADDRESS
PHONE NO.
CERTIFICATION
COMPANY
5. REFER TO MAINTENANCE AGREEMENT DOCUMENT.
6. SEE PROJECT SWQMP FOR ADDITIONAL INFORMATION.
SIGNATURE
BMP CONSTRUCTION AND INSPECTION NOTES:
THE EOW WILL VERIFY THAT PERMANENT BMPS ARE CONSTRUCTED ANDOPERATING IN COMPLIANCE WITH THE APPLICABLE REQUIREMENTS. PRIORTO OCCUPANCY THE EOW MUST PROVIDE:
1. PHOTOGRAPHS OF THE INSTALLATION OF PERMANENT BMPS PRIORTO CONSTRUCTION, DURING CONSTRUCTION, AND AT FINALINSTALLATION.
2. A WET STAMPED LETTER VERIFYING THAT PERMANENT BMPS ARECONSTRUCTED AND OPERATING PER THE REQUIREMENTS OF THEAPPROVED PLANS.3. PHOTOGRAPHS TO VERIFY THAT PERMANENT WATER QUALITYTREATMENT SIGNAGE HAS BEEN INSTALLED.
PRIOR TO RELEASE OF SECURITIES, THE DEVELOPER IS RESPONSIBLE FORENSURING THE PERMANENT BMPS HAVE NOT BEEN REMOVED OR MODIFIEDBY THE NEW HOMEOWNER OR HOA WITHOUT THE APPROVAL OF THE CITY
ENGINEER.
TYLER LAWSON
PLSA ENGINEERING
1911 SAN DIEGO AVENUNE
SAN DIEGO, CA 92110
(858) 259-8212
LEGEND
PROPERTY BOUNDARY
CENTERLINE OF ROAD
ADJACENT PROPERTY LINE
PUBLIC RIGHT-OF-WAY
PROPOSED WOOD DECK
PAMELA KAYE SULLIVAN MARTIN,
TRUSTEE OF THE PAMELA KAY SULLIVAN
MARTIN LIVING TRUST
CIRCLE, CARLSBAD, CA 92008
VACANT LOT ON BUENA VISTA
BMP TYPEBMP ID #SYMBOL CASQA NO.DRAWING NO.SHEET NO.(S)MAINTENANCEFREQUENCY
BMP TABLE
INSPECTION FREQUENCYQUANTITY
HYDROMODIFICATION & TREATMENT CONTROL
TREE WELL SEMI-ANNUALLYSD-A ______ANNUALLY &AS-NEEDED
SITE DESIGN
LA ANNUALLY MONTHLYSUBSTAINABLELANDSCAPING
DIRECT RUNOFFTO PERVIOUSAREAS 4 EA
SHEETS 2SD-K
SD-B ANNUALLY AS-NEEDED
SF.3,182
2
3 5
6 9
SINGLE SHEET BMP
SHEETS 2
SHEETS 2
PAMELA KAYE SULLIVAN MARTIN
BIOFILTRATIONBASIN SEMI-ANNUALLYBF-1 SF.______960 ANNUALLY &
AS-NEEDED1SHEETS 2
1 EA
TYPICAL SECTION - BIOFILTRATION BASIN BMP-1
SCALE: NOT TO SCALE
SECTION A-A-TREE WELL W/O GRATE
MODIFIED SDC GS DS SD-1.04A+GS-1.04B
SCALE: NOT TO SCALE
PLAN VIEW - CURB CUT @ TREE WELL
SDC GS DS GS-5.01
SCALE: NOT TO SCALE
SECTION B-B-TREE WELL W/O GRATE AT
MODIFIED SDC GS DS SD-1.04A+GS-1.04B
SCALE: NOT TO SCALE
TYPICAL DETAIL - FLOW CONTROL ORIFICE PLATE
NOT TO SCALE
7
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. DATE
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ENGINEER OF WORK REVISION DESCRIPTION
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