HomeMy WebLinkAboutPD 2022-0020; ABSORPTION SYSTEMS; TRASH CAPTURE STORM WATER QUALITY MANAGEMENT PLAN (SWQMP); 2022-09-28
CITY OF CARLSBAD
TRASH CAPTURE
STORM WATER QUALITY MANAGEMENT PLAN (SWQMP)
FOR
[INSERT PROJECT NAME]
[INSERT PROJECT ID (CT/MS/SDP/CDP/PD)]
[INSERT DRAWING No. (DWG ___-__)]
[INSERT GR No. _________]
ENGINEER OF WORK:
[INSERT CIVIL ENGINEER'S NAME AND PE NUMBER HERE, PROVIDE WET
SIGNATURE AND STAMP ABOVE LINE]
PREPARED FOR:
[INSERT APPLICANT NAME]
[INSERT ADDRESS]
[INSERT CITY, STATE ZIP CODE]
[INSERT TELEPHONE NUMBER]
PREPARED BY:
[INSERT COMPANY NAME]
[INSERT ADDRESS]
[INSERT CITY, STATE ZIP CODE]
[INSERT TELEPHONE NUMBER]
DATE:
[INSERT MONTH, DAY, YEAR]
Samuel Michael Bellomio, RCE 90818
September 28, 2022
Ware Malcomb
3911 Sorrento Valley Blvd. Ste 120
Carlsbad, CA 92121
Project Name: Carlsbad Oaks East Lot 24
Project ID: SDP16-05
Drawing No.: DWG 495-1A
Absorption Systems California
7901 Vickers Street
San Diego, CA 92111
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 Trash Capture Structural BMPs
Attachment 1: Backup for Trash Capture BMPs
Attachment 1a: DMA Exhibit
Attachment 1b: Tabular Summary of DMAs
Attachment 1c: Trash Capture BMP Design Calculations
Attachment 2: Trash Capture BMP Maintenance Thresholds and Actions
Attachment 3: Single Sheet BMP (SSBMP) Exhibit
CERTIFICATION PAGE
Project Name: [Insert]
Project ID: [Insert]
I hereby declare that I am the Engineer in Responsible Charge of design of storm water BMPs for
this project, and that I have exercised responsible charge over the design of the project as defined
in Section 6703 of the Business and Professions Code, and that the design is consistent with the
requirements of the BMP Design Manual, which is based on the requirements of SDRWQCB
Order No. R9-2013-0001 (MS4 Permit) or the current Order.
I have read and understand that the City Engineer has adopted minimum requirements for
managing urban runoff, including storm water, from land development activities, as described in
the BMP Design Manual. I certify that this SWQMP has been completed to the best of my ability
and accurately reflects the project being proposed and the applicable source control and site
design BMPs proposed to minimize the potentially negative impacts of this project's land
development activities on water quality. 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
________________________________________________________
Print Name
________________________________________________________
Company
____________________________
Date
Samuel Michael Bellomio
Ware Malcomb
90818 12/31/2023
09/28/2022
PROJECT VICINITY MAP
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CARLSBAD
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:
Carlsbad Oaks East Lot 24
2820 Loker Avenue E.209-803-150
SDP16-05 16-21
3,650
3,650 .0837
.0837
C cityof
Carlsbad
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E-34 Page 2 of 4 REV 02/22
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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E-34 Page 4 of 4 REV 02/22
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:
Samuel Bellomio Civil Engineering Manager
09/28/2022
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SITE INFORMATION CHECKLIST
Project Summary Information
Project Name
Project ID
Project Address
Assessor's Parcel Number(s) (APN(s))
Project Watershed (Hydrologic Unit) Carlsbad 904
Parcel Area
________ Acres (____________ Square Feet)
Civil Engineering Manager
209-083-150
SDP16-05
4.92 214,190
2820 Loker Ave. E.,
Carlsbad, CA 92010
904.31
Description of Existing Site Condition and Drainage Patterns
Select applicable Land Use Category:
High Density Residential
R-23 (15-23 du/ac)
R-30 (23-30 du/ac)
Industrial
PI (Planned Industrial)
Commercial
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)
Mixed Urban
PI/O (Planned Industrial/Office)
Public Transportation Stations
Description / Additional Information:
Description of Existing Site Topography and Drainage [How is storm water runoff conveyed from
the site? At a minimum, this description should answer (1) whether existing drainage
conveyance is natural or urban; (2) describe existing constructed storm water conveyance
systems, if applicable; and (3) is runoff from offsite conveyed through the site? if so, describe]:
The project site drainage conveyance is urban. Stormwater runoff generally sheet
flows from the southeast corner of the site to the northwest corner of the site. A
network of curbs, gutters and spillways direct runoff to an existing biofiltration basin
BMP for water quality treatment. Runoff from smaller storm events infiltrate into the
basin's underground gravel layer and discharge via a pipe underdrain and into an
overflow structure. Runoff from larger storm events pond on the surface of the
basin and eventually flow into an orifice in the overflow structure. All runoff
collected within the overflow structure outlets out to an existing Type "F" catch
basin before discharging offsite via a public storm drain pipe.
No offsite runoff is conveyed through the site.
X
Description of Proposed Site Development and Drainage Patterns
Project Description / Proposed Land Use and/or Activities:
Does the project include grading and changes to site topography?
Yes
No
Description / Additional Information:
Does the project include changes to site drainage (e.g., installation of new storm water
conveyance systems)?
Yes
No
Description / Additional Information:
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.
The site is already developed. The proposed work will not
alter existing drainage patterns.
The site renovation work includes re-grading a section of concrete paving for a
generator enclosure pad and in-filling an existing loading dock to store equipment.
The proposed work does not alter existing drainge patterns.
The existing site is a developed property including: a
commercial building, parking lot, sidewalk and landscape
areas.
X
X
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
Carlsbad Oaks East Lot 24
SDP16-05
495-1A
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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
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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:
Samuel Bellomio
09/28/2022
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SUMMARY OF TRASH CAPTURE BMPS
Trash Capture BMPs
All projects subject to trash capture requirements must implement trash capture BMPs (see
Chapter 4 of the BMP Design Manual). Selection of trash capture BMPs must be based on the
selection process described in Chapter 4.
Trash capture 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 trash capture BMPs (see Section 1.12 of the BMP Design Manual). Trash capture 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 trash capture BMP
implementation at the project site in the box below. Then complete the trash capture BMP
summary information sheet for each trash capture BMP within the project (copy the BMP
summary information page as many times as needed to provide summary information for each
trash capture BMP).
Describe the general strategy for trash capture BMP implementation at the site. This information
must describe how the steps for selecting and designing trash capture BMPs presented in
Section 4.4 of the BMP Design Manual were followed, and the results (type of BMPs selected).
[Continue on next page as necessary.]
The proposed improvements will not add additional storm drain inlets. The
project will propose to retrofit the existing overflow structure within the
existing biofiltration basin BMP with a Bioclean Grate Inlet Filter, Model No.
Bio-Grate-KMF 36-36-24 (selected from the "Certified Capture System List of
Trash Treatment Control Devices Updated September 2021"). The trash
capture BMP was sized by calculating the site-specific one-year, one-hour
flow rate and comparing it to the trash capture device treatment flow rate
(See Attachment 1c for calculations). The selected trash capture BMP was
selected to meet the requirements set forth in the City of Carlsbad BMP
Design Manual revised September 1, 2021.
[Continued from previous page – This page is reserved for continuation of description of general
strategy for trash capture BMP implementation at the site.]
Trash Capture BMP Summary Information
BMP ID No. Type of Trash Capture BMP Permit No. Drawing No.
Bioclean Grate Inlet Filter SDP16-05 495-1ABMP -1
ATTACHMENT 1
BACKUP FOR TRASH CAPTURE 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 Trash Capture BMP Design
Worksheets / Calculations (Required)
Refer to Appendices J of the BMP
Design Manual for trash capture BMP
design guidelines
Included
Included on
Attachment 1c
X
X
X
Use this checklist to ensure the required information has been included on the DMA
Exhibit:
The DMA Exhibit must identify:
Site topography and impervious areas
Site drainage network and connections to drainage offsite
Proposed grading (if applicable)
Drainage management area (DMA) boundaries, DMA ID numbers, and DMA areas (square
footage or acreage)
Trash Capture BMPs (identify location and type of BMP)
X
X
X
X
X
INSTALL BIOCLEAN
BIO-GRATE-KMF
36-36-24 TRASH CAPTURE DEVICE
PER MANUFACTURER'S SPECIFICATIONS
INSTALL BIOCLEAN
BIO-GRATE-KMF
36-36-24 TRASH CAPTURE DEVICE
PER MANUFACTURER'S SPECIFICATIONS
2 ADD NEW SHEET 6
7/1/22 SB
24
"
2
2
ADD TRASH CAPTURE BMP DETAILS
2
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I
UNOERDRAIN
CONNECTION 6" PIPE (PERF.)
,,-r--.....,6" X 6" PRECAST-CATCH BASIN PER MODIFIED
PLAN
DRSD D-08 TYPE G-2 SURFACE SLOT
WIDTH = 2'
HEIGHT = 0.25'
ELEVATION ABOVE FG= 0.5'
j\ '18" MIN WELL L-'imAINED soiL v----....
12·
ORIFICE PLATE MIN. SCUARE
DIMENSIDNS-1.0 FT GREATER
THAN PIPE DIA. HOT-DIP
GALVAN I ZED PLATE AFTER
HOLES HAVE BEEN DRILLED
NOTE: SEE SHEET 3-4 FOR BASIN LOiC,,:OONS-...._/
i/2" MAX ,INFlOW PIPE,
=)c.~~v ,--ORIFICE DIAMETER
(SEE TABLE RIGHT) ' 0 -------3/8• DIA. HOLE
FLOW CONTROL ORIFICE PLATE
**1 SS ! L --"" LA-.:ER ,AROUND ALL PIPES!
IMPERMEABLE LINER ~BM-P~-0-RI-FlC_E_S_lZE-,_ SIDES AND BOTTOM
1 2.so· UNDERDRAIN
CONNECTION
6" PERF. PVC
PRIVATE BIOFILTRATION OUTLET DETAIL
NTS
PLATT: SEE DET. THIS
I
40 20 0 40
e 1·1 ' •,1.1-ln .I
• ,-SCALE: 1 "· =
RETENTION AREA
SHALL BE LEVEL
AND DEPRESSED
A MINIMUM OF 18"
f;ROM THE
SURROUNDING ,
GRADE
EXTEND LINER TO A TLEAST--~
6" HIGHER THAN RISER
STRUCTURE OVERFLOW
INLET ELEVATION
INSTALL ,3" LAYER OF
3 /8" GRAVEL AT BIOMIX
SOil /GRAVEL. INTERFACE
6'" PERFORATE
PVC PIPE
80
□-I Ft
40'
BMP ID # BMP TYPE SYMBOL CASQA NO.
HYDROMODIFICATION & TREATMENT CONTROL
CD
BIOFIL TRA TION
AREA
SOURCE CONTROL/LID
® CLrRB INt'ET
FILTER
(BIOCLEAN
OR EQUAL)
0 -0 TRASH ENCLOSURE
STENCILS
TRASH CAPTURE
&fffi!ij
oP
NO DUMPING
DRAINS TO OCEAN
5 GRATE INLET FILTER
PARTY RESPONSIBLE FOR MAINTENANCE:
NAME CARLSBAD OAKS EAST VENTURES, LP
TC-32
S0-32
SD-13
ADDRESS:· 3575 KEN~ON STREET
SAN DIEGO, CA 92110 CONTACT TED JCHANG
PHONE NO.: (619)'=223-1663
PLAN PREPARED BY:
NAME: RJD
COMPANY: REC CON.SULIANTS INC.
ADDRESS:, 2442 SECOND, AVENUE:
SAN DIEGO, CA '92101
.
PHONE NO.: (619)-326-6021
120
at 71
NOTES:
SOIL MIX PER ClTY QF
SAN DIEGO LID MANUAL
SEAL
PLANTING PER CITY OF SAN DIEGO APPROVED
PLANT LIST -SAN _ DIEGO SEDGE ( GRASS)
& MULEFAT (SHRUBS)
NLET WITH APPROVED, GRATE
36," X 36" PRECAST CATCH BASIN PER
MODIFIED SDRSO D-08 TYPE G-2
. ~\..o'II
,._c'<.--
c,\l'<-~
*18" MIN WELL
DRAINED SOIL
MPERMEABLE LINER
SIDies AND BOTTOM
OUTLET PIPE TO EXIST STOR
DRAIN SYSTEM.
**12" CLASS II GRAVEL
LAYER AROUND ALL
PIPES
SLOPE BOTTOM OFF BIOFIL TRATION
BASIN TOWARDS SUBDR.AIN
TG PER PLAN
1 SECTION 1, . 1i
"' ii '1-
36' _ 36," RRECAST CATCH
E! IN AS PER MODIFIED
SD SD D-08 TYPE G-2
CONTROL ORIFICE
SEE DET. THIS
-Ol/TFALL PIPE,
SIZE PER PLAN
FLOW
'BIOFIL TRA TION ENGINEERED SOIL SflALL BE MTNTM-UM 18" DEEP "SANDY LOAM"
SOIL MIX WITH NO MORE THAN 5% CLAY CONTENT. THE MIX SflALL CONTAIN 50-60%
SAND, 20-30% COMPOST OR HARDWOOD MULCfl, AND 20-30% TOPSOIL.
"3/4" CRUSHED ROCK LAYER. 12" GRAVEL DEPTH VARY PER SWQMP #16-21
PRIVATE BIOFILTRATION DETAIL FOR BMP
NTS
/\
DATE INITIAL
BMP 'TABLE
QUANTITY
7,427 Sf
1 [)\
2 EA
8 EA
1 EA
DRA\\iNG NO. SHEET NO.(S)
495-1A 3, 4
495-'1A 4
495-1A 3, 5
495-1A 3, 4
495-1A 3
INSPECTION *
FREQUENCY
QUARTERLY
AS-NEEDED
S S A
RECOMMENDATIONS OR THESE PLANS.
MAINTENANCE *
FREQUENCY
SEMI-ANNUALLY
AS-NEEDED
2. NO CHANGES TO THE PROPOSED BMPS ON THIS SHEET VviTHOUT PRIOR
APPROVAL FJlQM THE CITY ENGINEER.
3. NO SUBSTITUTIONS TO 1HE IMA TERIAL OR TYPES OR PLANTING TYPES
WITHOUT PRJOR, APPROVAL FROM THE Clfi ENGINEER.
4. NO OCCUPANCY \\ill BE GRANTED UNTIL THE CITY INSPECTION STAFF
HAS INSPECTED THIS PROJECT FOR APPROPRIATE BMP CONSTRUCTION
AND INSTALLATION.
5. REFER TO MAINTENANCE AGREEMENT DOCUMENT.
6. SEE PROJECT SWMP FOR ADDITIONAL INFORMATION.
4'' PVC SCREW' CAP ,-
RIM IS '12"' ABOVE
GRADE
4" NON
PERFORATED
STANJl.PIPE
"12" CLASS II GRAVEl
LAYE~ AROUND AILL ~IPES
WATER TIGHT
CAP ON
TmMINAL
END OF PIPE
l/SE 45' WYE AND FITTING OR
EQUIVALENT DIRECTIONAL
CLEANOUT TO_CONNECT
DERDRAIN TO STANDPIPE
=--18" MIN WELL
DRAINED SOIL
INSTALL 3" LA-.:ER
OF 3 /B" GRAVEL
CONNECT PIPE [0
DOWNSTREAM! CLEl<N
Ol/T.
6" PERFORATED
., PVC UNDERDRAIN
, ~NATIVE S~IL
IMPERMEABLE LINER
_SJDES AND BOTTOM
BIOF IL TRA TION CLEAN OUT DETAIL
Civil Engineering• Environmental
244 2 Second Avenue
So11 D,ego, Cl\ 92101
(619)232-9200 (6 19)232~9210 Fa,
Consultants, Inc.
W I CITY OF CARLSBAD
ENGINEERING DEPARTMENT
I SH~ETS I
SINGLE SHEET BMP SITE PLAN
CARLSBAD OAKS EAST
L0:'f-24
RECORD COPY PROJECT NO.
.SDP IG, -r:JS Jj DRAWING NO. DATE INITIAL QATE INITIAL
ENGINEER OF WORK REVISION DESCRIPTION OTHER APPROVAL CITY APPROVAL INITIAL
11/2~/f&
DATE I 4q5 -IA I
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Data description
Data type:Precipitation intensity Units:English Time series type:Partial duration
Select location
1) Manually:
a) By location (decimal degrees, use "-" for S and W): Latitude:Longitude:Submit
b) By station (list of CA stations): Select station
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Show stations on map
Location information:
Name: Carlsbad, California, USA*
Latitude:33.1320°
Longitude:-117.2516°
Elevation:406.6 ft **
* Source: ESRI Maps
** Source: USGS
PF tabular PF graphical Supplementary information
Curves PF estimates with confidence intervals
NOAA ATLAS 14 POINT PRECIPITATION FREQUENCY ESTIMATES: CA
POINT PRECIPITATION FREQUENCY (PF) ESTIMATES
WITH 90% CONFIDENCE INTERVALS AND SUPPLEMENTARY INFORMATION
NOAA Atlas 14, Volume 6, Version 2
Print page
2820 Loker Ave E, Carlsbad, CA, 92010, USA
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–
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1mi
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PF Map: Contiguous US https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=nm
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2 of 2 7/5/2022, 5:12 PM
PDS-based intensity-duration-frequency (IDF) curves
Latitude: 33.1320°, Longitude: -117.2516°
0.001 C: C: C: E E E .;., 6 .;., ... ...
10.000
~
1.000 ~---
~
,--i-.---:-
C: E 6 "'
0.10 0 ~
L--::.::: -0.010 ~ .. ~ ~-
C: ~ E .s;;; "' 6 "'
~ ~ >, >, >, >, >, .s;;; .s;;; .s;;; .s;;; "' "'"' "' "' rl, <h " .. -0 -0 -0 -0 -0 ... N "' rl," r.:.. 0
DJration ...
>, >, >, >, "' "' "'"' -0 -0 -0-0 6 6 J-iO N "' <t"'
O.OOll~-~2----5~--l~0----2~5--5~0--l-0~0--2~0-0---5-0~0--10~00
Average recurrence interval (years)
NOAA Atlas 14, Volume 6, Version 2 Created (GMT): Wed Jul 6 00:12:10 2022
Average recurrence
interval
(years)
2
-5
-10
-25
-50
-100
-200
500
-1000
Duration
5-mln -2-<lay
1<Hnln -3-<lay
15-mln -4-day
-3<Hnln -7-<lay
-6<Hnln -10-<lay
-2-11, -20-<lay
-3-11r -30-<lay
-6-11r -45-<lay
-12-11, -60-<lay
-24--lir
NOAA Atlas 14, Volume 6, Version 2
Location name: Carlsbad, California, USA*
Latitude: 33.132°, Longitude: -117.2516°
Elevation: 406.6 ft**
* source: ESRI Maps
** source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
Sanja Perica, Sarah Dietz, Sarah Heim, Lillian Hiner, Kazungu Maitaria, Deborah Martin, Sandra Pavlovic,
Ishani Roy, Carl Trypaluk, Dale Unruh, Fenglin Yan, Michael Yekta, Tan Zhao, Geoffrey Bonnin, Daniel
Brewer, Li-Chuan Chen, Tye Parzybok, John Yarchoan
NOAA, National Weather Service, Silver Spring, Maryland
PF_tabular | PF_graphical | Maps_&_aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)1
Duration Average recurrence interval (years)
1 2 5 10 25 50 100 200 500 1000
5-min 1.44
(1.21-1.74)
1.82
(1.54-2.20)
2.35
(1.97-2.83)
2.80
(2.33-3.40)
3.43
(2.75-4.32)
3.95
(3.10-5.08)
4.49
(3.43-5.94)
5.08
(3.76-6.92)
5.92
(4.20-8.44)
6.61
(4.52-9.78)
10-min 1.04
(0.870-1.24)
1.31
(1.10-1.57)
1.69
(1.41-2.03)
2.00
(1.66-2.44)
2.46
(1.97-3.10)
2.83
(2.21-3.64)
3.22
(2.45-4.25)
3.64
(2.69-4.96)
4.24
(3.01-6.05)
4.74
(3.24-7.01)
15-min 0.836
(0.704-1.00)
1.06
(0.888-1.27)
1.36
(1.14-1.64)
1.62
(1.34-1.96)
1.98
(1.59-2.50)
2.28
(1.78-2.94)
2.59
(1.98-3.43)
2.93
(2.17-4.00)
3.42
(2.42-4.88)
3.82
(2.61-5.65)
30-min 0.592
(0.498-0.710)
0.748
(0.630-0.898)
0.962
(0.806-1.16)
1.14
(0.950-1.39)
1.40
(1.13-1.77)
1.61
(1.27-2.08)
1.84
(1.40-2.43)
2.08
(1.54-2.83)
2.42
(1.72-3.45)
2.71
(1.85-4.00)
60-min 0.427
(0.359-0.512)
0.540
(0.454-0.648)
0.694
(0.582-0.836)
0.825
(0.686-1.00)
1.01
(0.812-1.28)
1.16
(0.913-1.50)
1.33
(1.01-1.75)
1.50
(1.11-2.04)
1.75
(1.24-2.49)
1.95
(1.34-2.89)
2-hr 0.300
(0.252-0.360)
0.376
(0.316-0.451)
0.479
(0.402-0.578)
0.568
(0.472-0.690)
0.693
(0.556-0.873)
0.794
(0.622-1.02)
0.902
(0.689-1.19)
1.02
(0.754-1.39)
1.19
(0.840-1.69)
1.32
(0.904-1.96)
3-hr 0.241
(0.203-0.289)
0.301
(0.253-0.362)
0.384
(0.322-0.463)
0.454
(0.377-0.552)
0.553
(0.444-0.697)
0.634
(0.497-0.817)
0.719
(0.549-0.951)
0.810
(0.600-1.11)
0.942
(0.667-1.34)
1.05
(0.717-1.55)
6-hr 0.164
(0.138-0.197)
0.206
(0.173-0.247)
0.262
(0.220-0.316)
0.309
(0.257-0.376)
0.376
(0.301-0.474)
0.430
(0.337-0.553)
0.486
(0.371-0.643)
0.546
(0.404-0.744)
0.631
(0.447-0.899)
0.701
(0.479-1.04)
12-hr 0.108
(0.091-0.130)
0.137
(0.115-0.164)
0.175
(0.146-0.210)
0.206
(0.171-0.250)
0.250
(0.200-0.314)
0.284
(0.223-0.366)
0.319
(0.244-0.423)
0.357
(0.264-0.487)
0.409
(0.290-0.583)
0.451
(0.308-0.667)
24-hr 0.068
(0.060-0.079)
0.087
(0.077-0.101)
0.112
(0.098-0.130)
0.132
(0.115-0.154)
0.159
(0.135-0.192)
0.181
(0.150-0.223)
0.203
(0.165-0.256)
0.226
(0.178-0.293)
0.258
(0.196-0.347)
0.283
(0.208-0.393)
2-day 0.042
(0.037-0.049)
0.054
(0.048-0.063)
0.070
(0.061-0.081)
0.083
(0.072-0.097)
0.100
(0.085-0.121)
0.114
(0.095-0.140)
0.128
(0.104-0.162)
0.143
(0.113-0.185)
0.164
(0.124-0.220)
0.180
(0.132-0.250)
3-day 0.031
(0.028-0.036)
0.041
(0.036-0.047)
0.053
(0.046-0.061)
0.062
(0.054-0.073)
0.076
(0.064-0.092)
0.087
(0.072-0.107)
0.098
(0.079-0.123)
0.109
(0.086-0.142)
0.125
(0.095-0.169)
0.138
(0.101-0.192)
4-day 0.026
(0.023-0.030)
0.033
(0.030-0.039)
0.044
(0.038-0.051)
0.052
(0.045-0.061)
0.063
(0.054-0.077)
0.072
(0.060-0.089)
0.082
(0.066-0.103)
0.092
(0.072-0.119)
0.105
(0.080-0.142)
0.116
(0.085-0.161)
7-day 0.017
(0.015-0.020)
0.023
(0.020-0.026)
0.029
(0.026-0.034)
0.035
(0.031-0.041)
0.043
(0.037-0.052)
0.050
(0.041-0.061)
0.056
(0.046-0.071)
0.063
(0.050-0.082)
0.073
(0.055-0.098)
0.080
(0.059-0.112)
10-day 0.013
(0.012-0.015)
0.018
(0.015-0.020)
0.023
(0.020-0.027)
0.028
(0.024-0.032)
0.034
(0.029-0.041)
0.039
(0.033-0.048)
0.045
(0.036-0.056)
0.050
(0.040-0.065)
0.058
(0.044-0.078)
0.064
(0.047-0.089)
20-day 0.008
(0.007-0.009)
0.011
(0.010-0.013)
0.014
(0.013-0.017)
0.017
(0.015-0.020)
0.022
(0.018-0.026)
0.025
(0.021-0.031)
0.028
(0.023-0.036)
0.032
(0.025-0.041)
0.037
(0.028-0.050)
0.041
(0.030-0.058)
30-day 0.007
(0.006-0.008)
0.009
(0.008-0.010)
0.012
(0.010-0.013)
0.014
(0.012-0.016)
0.017
(0.015-0.021)
0.020
(0.017-0.025)
0.023
(0.019-0.029)
0.026
(0.021-0.034)
0.031
(0.023-0.041)
0.034
(0.025-0.048)
45-day 0.005
(0.005-0.006)
0.007
(0.006-0.008)
0.009
(0.008-0.011)
0.011
(0.010-0.013)
0.014
(0.012-0.017)
0.016
(0.013-0.020)
0.018
(0.015-0.023)
0.021
(0.017-0.027)
0.025
(0.019-0.033)
0.028
(0.020-0.038)
60-day 0.004
(0.004-0.005)
0.006
(0.005-0.007)
0.008
(0.007-0.009)
0.010
(0.008-0.011)
0.012
(0.010-0.015)
0.014
(0.012-0.017)
0.016
(0.013-0.020)
0.018
(0.015-0.024)
0.022
(0.017-0.029)
0.025
(0.018-0.034)
1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates
(for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds
are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
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PF graphical
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D 1 II II II II D I II II II II D I II II II II D I II II II II D I II II II II
II II II II
D II II II II
D I II II II II
D I II II II II
D I II II II II
D I II II II II
D I II II II II
D I II II II II
D I II II II II D I II II II II D I II II II II
D I II II II II D I II II II II D I II II II II D I II II II II
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Maps & aerials
Small scale terrain
Precipitation Frequency Data Server https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=33.1320...
2 of 4 7/5/2022, 5:10 PM
.~ "' r:: QJ .µ
C
r:: 0 ·.o 2 'ii
u E c..
~ ..c ---C
.~ "' r:: QJ .µ C
r:: 0 ·.o re .µ 'ii
u E c..
0.001 r:: C:
E .E
PDS-based intensity-duration-frequency (IDF) curves
Latitude: 33 1320•, Longitude: -117 .2516°
C: C C: I.. I.. I.. L. L. >, >,>, >, >, .E .E .E .r:: .r:: .r:: .r:: .r:: re re re re re -c -c-c -c "' ~ lh N ~ "9 .;, 6 .;, I I "' ~-.;\-6 0 0 P"i r--P"i P"i m \0
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0.001 ..._ __ ..__, ___ _., ___ ..__, ___ __,_i ___ .__,· __ ___,__i __ __,,, ____ ..._,· ----'
1 2 5 10 25 50 100 200 500 1000
Average recurrence interval (years)
NOAA Atlas 14, Volume 6, Version 2 Created (GMT}: Wed Jul 6 00:09:40 2022
Average r,ecurrence
interval
(years)
2
5
10
26
50
100
200
500
1000
Dura ion
!Hnln
10-mln
1!Hnln
JO-min
60-mln
2--tir
J--tir
6--tir
12-hr
24-hr
2-day
3-day
4-day
7-day
10-day
20-day
JO-day
45-day
60-day
Large scale terrain
Large scale map
Large scale aerial
+
–
3km
2mi
+
–
100km
60mi
+
–
100km
60mi
Precipitation Frequency Data Server https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=33.1320...
3 of 4 7/5/2022, 5:10 PM
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Data description
Data type:Precipitation intensity Units:English Time series type:Partial duration
Select location
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Show stations on map
Location information:
Name: Carlsbad, California, USA*
Latitude:33.1320°
Longitude:-117.2516°
Elevation:406.6 ft **
* Source: ESRI Maps
** Source: USGS
PF tabular PF graphical Supplementary information
Curves PF estimates with confidence intervals
NOAA ATLAS 14 POINT PRECIPITATION FREQUENCY ESTIMATES: CA
POINT PRECIPITATION FREQUENCY (PF) ESTIMATES
WITH 90% CONFIDENCE INTERVALS AND SUPPLEMENTARY INFORMATION
NOAA Atlas 14, Volume 6, Version 2
Print page
2820 Loker Ave E, Carlsbad, CA, 92010, USA
+
–
2km
1mi
Map
Terrain
PF Map: Contiguous US https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=nm
1 of 2 7/5/2022, 5:12 PM
L __j ® 0 D
XI 0.. I
D
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PF Map: Contiguous US https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=nm
2 of 2 7/5/2022, 5:12 PM
PDS-based intensity-duration-frequency (IDF) curves
Latitude: 33.1320°, Longitude: -117.2516°
0.001 C: C: C: E E E .;., 6 .;., ... ...
10.000
~
1.000 ~---
~
,--i-.---:-
C: E 6 "'
0.10 0 ~
L--::.::: -0.010 ~ .. ~ ~-
C: ~ E .s;;; "' 6 "'
~ ~ >, >, >, >, >, .s;;; .s;;; .s;;; .s;;; "' "'"' "' "' rl, <h " .. -0 -0 -0 -0 -0 ... N "' rl," r.:.. 0
DJration ...
>, >, >, >, "' "' "'"' -0 -0 -0-0 6 6 J-iO N "' <t"'
O.OOll~-~2----5~--l~0----2~5--5~0--l-0~0--2~0-0---5-0~0--10~00
Average recurrence interval (years)
NOAA Atlas 14, Volume 6, Version 2 Created (GMT): Wed Jul 6 00:12:10 2022
Average recurrence
interval
(years)
2
-5
-10
-25
-50
-100
-200
500
-1000
Duration
5-mln -2-<lay
1<Hnln -3-<lay
15-mln -4-day
-3<Hnln -7-<lay
-6<Hnln -10-<lay
-2-11, -20-<lay
-3-11r -30-<lay
-6-11r -45-<lay
-12-11, -60-<lay
-24--lir
TRASH CAPTURE CALCULATIONS
DMA
TOTAL AREA
(SF)
AREA
(AC)
PERVIOUS AREA
(SF)
IMPERVIOUS AREA
(SF) % IMPERVIOUS C
Q1yr-1hr
(CFS) BMP TYPE MODEL NO.
TRASH CAPTURE
TREATMENT FLOW RATE
(CFS)
1 201,159 4.618 52,636 148,523 74% 0.69 1.361 Grate Inlet Filter
BIO-GRATE-KMF
36-36-24 17.14
Surface Type C-Values
0.1
Impervious Surface 0.9
The weighted runoff factor has been calculated per the City of Carslbad Design Manual, Appendix B.
The 1-year, 1-hour design flow rate has been caculated per the City of Carlsbad Design Manual, Appendix J.
Q1yr,1hr = C x 1yr,1hr x A
Q1yr,1hr = (0.69) x (0.427 in/hr)(4.618 aces) = 1.361 cfs
1yr,1hr = 0.427 in/hr (per NOAA Atlas 14 Point Precipitation Frequency Estimates)
Landscape
I I I I I I I
I I I
Grate Inlet Filter
A Stormwater Trash Capture Solution
A Forterra Company
Bio ~Clean
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t t
GRATE INLET MLS
The Bio Clean Multi-Level Screening Grate Inlet Filter
is the standard configuration used for more than a decade and provides the best overall performance for all pollutants of concern.
The Bio Clean Grate Inlet Media Filter is an advanced-level
filtration device designed with Kraken membrane cartridges
for increased removal efficiencies.
PERFORMANCE
OPERATION
MULTI-LEVELSCREENING
80%
100%
100% REMOVAL
OF
TRASH
• MEDIUM LEVEL REMOVAL FOR
PARTICULATE METALS AND NUTRIENTS
• INCLUDES HYDROCARBON BOOM FOR
REMOVAL OF OILS AND GREASE
REMOVAL
OF
SEDIMENTS
REMOVAL
OF
FOLIAGE
SPECIFICATIONS
BYPASS FLOW (cfs)SCREEN
TREATMENT FLOW (cfs)MODEL #
1.551.19BIO-GRATE-MLS-12-12-12
3.684.32BIO-GRATE-MLS-18-18-18
4.837.67BIO-GRATE-MLS-24-24-24
6.2112.97BIO-GRATE-MLS-30-30-24
6.5913.53BIO-GRATE-MLS-25-38-24
7.6019.64BIO-GRATE-MLS-36-36-24
10.1324.84BIO-GRATE-MLS-48-48-18
GRATE INLET MEDIA FILTER
PERFORMANCE
OPERATION
KRAKENTYPE
85% 72% REMOVAL OF
TOTAL PHOSPHORUS
REMOVAL
OF
FINE TSS
52% 58% 81% 60% REMOVAL
OF
COPPER
REMOVAL
OF
ZINC
REMOVAL
OF OILS &
GREASE
REMOVAL
OF FECAL
COLIFORM
SPECIFICATIONS
BYPASS FLOW (cfs)MEDIA
TREATMENT FLOW (cfs)MODEL #
1.55.04BIO-GRATE-KMF-12-12-30
3.68.04BIO-GRATE-KMF-18-18-30
4.83.11BIO-GRATE-KMF-24-24-30
6.21.27BIO-GRATE-KMF-36-36-30
7.60.49BIO-GRATE-KMF-48-48-30
Bypass Flow Path
Treatment Flow Path
Kraken MembraneCartridges
Cartridge HandleHigh Flow Bypass
Cartridge Mount
Hydrocarbon Boom
CoarseScreen
Medium Screen
Fine Screen
Bypass Flow Path
Treatment Flow Path
INSTALLATION
Highly effective trash capture.
MAINTENANCE
Filters can be lifted out by hand for routine
maintenance and inspections.
Bio Clean's Grate Inlet Filters are easily installed
directly under grated inlets with no special
equipment.
Perfect for retrofit applications like parking lots,
roadways, and bioswale bypass structures.
122018R1A
5796 Armada Drive Suite 250
Carlsbad, CA 92008
855.566.3938
stormwater@forterrabp.com
biocleanenvironmental.com
A Forterra Company
INSTALLATION NOTES:
PLAN VIEW
(GRATE NOT SHOWN)
ELEVATION VIEW
FLOW DIAGRAM
GRATE INLET FILTER
FULL CAPTURE
STANDARD DETAIL
L
~"'0'"'0'"-0' "<7""'7""'7""'7""'7
V~"'0'"-0'"-0''"U' "<7 ""'7 ""'7 ""'7 ""'7
"iQ"°'i;(?'~""Q'~"'V" "'V"~~"-0'~
v~~""<:7'~"-V" "'V"~~"-0'~
L - - - - -J _---,.._,....
""'7""'7""'7""'7 "'V"~""C"'"-0'~
"<:?'""'7""'7""'7""'7"<7 "'V"~~"'-<:7'~
"<:?' ""'7 ""'7 ""'7 ""'7 "<7 "'V"~"'0'"-0'~
"<:?' ""'7 ""'7 ""'7 ""'7 "<7 "'V"~~"'-<:7'"<':7'
OUTFLOW
NON-CLOGGING SCREEN
MEETS FULL CAPTURE
REQUIREMENTS
BO"OM SCREEN
MEETS FULL CAPTURE
REQUIREMENTS
1. ALL HARDWARE, FLANGE, FRAME, SCREENS SHALL BE STAINLESS STEEL
2. HYDROCARBON BOOM SHALL BE r DIAMETER AND CONNECTED,
MECHANICALLY TO THE FILTER FRAME WITH RAILS ALLOWING IT TO FLOAT
ON THE WATER SURFACE REGARDLESS OF H£/GHT.
3. SEE PERFORMANCE REPORTS IN MANUFACTURES SPECIF/CATIONS.
4. OTHER STANDARD AND CUSTOM MODEL SIZES AVAILABLE -CONTACT
BIO CLEAN FOR MORE INFORMATION.
5. BASED ON 37% OPEN AREA.
6. CONSIDERS A SAFETY FACTOR OF 2. 0.
7. CONSIDERS A LOCAL DEPRESSION POND/ING DEPTH OF 6 INCHES ..
8. STORAGE CAPACITY BASED ON THE BASKET HALF FULL
9. CONCRETE STRUCTURES SOLD SEPARATELY.
1:15 SCALE
MODEL#
810-GRATE-KMF
12-12-12
810-GRATE-KMF
18-18-12
810-GRATE-KMF
26-26-12
810-GRATE-KMF
24-40-12
810-GRATE-KMF
26-26-24
810-GRATE-KMF
24-40-24
810-GRATE-KMF
36-36-24
PROPRIETARY AND CONFIDENTIAL:
TH£ INFORMATION CONTAINED IN THIS DOCUMENT IS TH£ SOI.£
PROP£RTY OF FOKTfRRA ANO ITS COMPANIES. THIS DOCUMENT,
NOR ANY PAKT TH£R£0F, "4Y 8£ IJS£0, R£PROOUC£D OR MOOIF/£0
IN ANY "4NN£R WTTH OUT TH£ WRfTTfN CONS£NT OF FORTfRRA.
Bio 6-Clean
AForterraCGlnpany
TREATMENT
FLOW
RATE
{CFS)
0.97
1.86
2.78
6.71
9.49
13.53
17.14
BYPASS
FLOW
{CFS)
1.55
3.68
4.83
6.59
4.83
6.59
7.60
SOLIDS
STORAGE
CAPACITY
{CF)
0.14
0.35
0.60
1.04
1.80
3.12
4.45
ATTACHMENT 2
Trash Capture 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 2 must identify:
Typical maintenance indicators and actions for proposed trash capture BMP(s)
based on Section 7.7 of the BMP Design Manual
Final Design level submittal:
Attachment 2 must identify:
Specific maintenance indicators and actions for proposed trash capture BMP(s).
This shall be based on Section 7.7 of the BMP Design Manual and enhanced to
reflect actual proposed components of the trash capture BMP(s)
How to access the trash capture 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 trash capture BMP and compare to maintenance thresholds)
Manufacturer and part number for proprietary parts of trash capture 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
X
X
X
X
X
OPERATION & MAINTENANCE
Bio Clean Environmental Services, Inc.
398 Via El Centro
Oceanside, CA 92058
www.BioCleanEnvironmental.com
p: 760.433.7640
f: 760.433.3176
Grate Inlet Filter
Bio~Clean
A Forterra Company
1 | Page
OPERATION & MAINTENANCE
The Bio Clean Grate Inlet Filter is a stormwater device designed to remove high levels of trash,
debris, sediments and hydrocarbons. The filter is available in several configurations including trash
full capture, multi‐level screening, Kraken membrane filter and media filter variations. This manual
covers maintenance procedures of the trash full capture and multi‐level screening configurations. A
supplemental manual is available for the Kraken and media filter variations. This filter is made of
100% stainless steel and is available and various sizes and depths allowing it to fit in any grated
catch basin inlet. The filters heavy duty construction allows for cleaning with any vacuum truck. The
filet can also easily be cleaned by hand.
As with all stormwater BMPs, inspection and maintenance on the Grate Inlet Filter is necessary.
Stormwater regulations require BMPs be inspected and maintained to ensure they are operating as
designed to allow for effective pollutant removal and provide protection to receiving water bodies.
It is recommended that inspections be performed multiple times during the first year to assess site‐
specific loading conditions. This is recommended because pollutant loading can vary greatly from
site to site. Variables such as nearby soil erosion or construction sites, winter sanding of roads,
amount of daily traffic and land use can increase pollutant loading on the system. The first year of
inspections can be used to set inspection and maintenance intervals for subsequent years. Without
appropriate maintenance a BMP can exceed its storage capacity which can negatively affect its
continued performance in removing and retaining captured pollutants.
System Diagram:
Hllighi Flow
Bypass
Outl9t Pipe
Bio ~Clean
A Forterra Company
Hydroceubon
Boom
~---Mountllng1
Flange
2 | Page
Inspection Equipment
Following is a list of equipment to allow for simple and effective inspection of the Grate Inlet Filter:
Bio Clean Environmental Inspection Form (contained within this manual).
Manhole hook or appropriate tools to remove access hatches and covers.
Appropriate traffic control signage and procedures.
Protective clothing and eye protection.
Note: entering a confined space requires appropriate safety and certification. It is generally
not required for routine inspections or maintenance of the system.
Inspection Steps
The core to any successful stormwater BMP maintenance program is routine inspections. The
inspection steps required on the Grate Inlet Filter are quick and easy. As mentioned above the first
year should be seen as the maintenance interval establishment phase. During the first year more
frequent inspections should occur in order to gather loading data and maintenance requirements
for that specific site. This information can be used to establish a base for long‐term inspection and
maintenance interval requirements.
The Grate Inlet Filter can be inspected though visual observation. All necessary pre‐inspection steps
must be carried out before inspection occurs, such as safety measures to protect the inspector and
nearby pedestrians from any dangers associated with an open grated inlet. Once the grate has been
safely removed the inspection process can proceed:
Prepare the inspection form by writing in the necessary information including project name,
location, date & time, unit number and other info (see inspection form).
Observe the filter with the grate removed.
Look for any out of the ordinary obstructions on the grate or in the filter and its bypass.
Write down any observations on the inspection form.
Through observation and/or digital photographs estimate the amount of trash, foliage and
sediment accumulated inside the filter basket. Record this information on the inspection
form.
Observe the condition and color of the hydrocarbon boom. Record this information on the
inspection form.
Finalize inspection report for analysis by the maintenance manager to determine if
maintenance is required.
Bio ~Clean
A Forterra Company
3 | Page
Maintenance Indicators
Based upon observations made during inspection, maintenance of the system may be required
based on the following indicators:
Missing or damaged internal components.
Obstructions in the filter basket and its bypass.
Excessive accumulation of trash, foliage and sediment in the filter basket. Maintenance is
required when the basket is greater than half‐full.
The following chart shows the 50% and 100% storage capacity of each filter height:
Model Filter Basket
Diameter (in)
Filter Basket
Height (in)
50% Storage
Capacity (cu ft)
100% Storage
Capacity (cu ft)
BC‐GRATE‐12‐12‐12 10.00 12.00 0.27 0.55
BC‐GRATE‐18‐18‐18 16.00 18.00 1.05 2.09
BC‐GRATE‐24‐24‐24 21.00 24.00 2.41 4.81
BC‐GRATE‐30‐30‐24 27.00 24.00 3.98 7.95
BC‐GRATE‐36‐36‐24 33.00 24.00 5.94 11.88
BC‐GRATE‐48‐48‐18 44.00 18.00 7.92 15.84
Maintenance Equipment
It is recommended that a vacuum truck be utilized to minimize the time required to maintain the
Curb Inlet Filter, though it can easily cleaned by hand:
Bio Clean Environmental Maintenance Form (contained in O&M Manual).
Manhole hook or appropriate tools to remove the grate.
Appropriate safety signage and procedures.
Protective clothing and eye protection.
Note: entering a confined space requires appropriate safety and certification. It is generally
not required for routine maintenance of the system. Small or large vacuum truck (with
pressure washer attachment preferred).
Maintenance Procedures
It is recommended that maintenance occurs at least two days after the most recent rain event to
allow debris and sediments to dry out. Maintaining the system while flows are still entering it will
increase the time and complexity required for maintenance. Cleaning of the Grate Inlet Filter can be
performed utilizing a vacuum truck. Once all safety measures have been set up cleaning of the
Grate Inlet Filter can proceed as followed:
Bio ~Clean
A Forterra Company
4 | Page
Remove grate (traffic control and safety measures to be completed prior).
Using an extension on a vacuum truck position the hose over the opened catch basin. Insert
the vacuum hose down into the filter basket and suck out trash, foliage and sediment. A
pressure wash is recommended and will assist in spraying of any debris stuck on the side or
bottom of the filter basket. Power wash off the filter basket sides and bottom.
Next remove the hydrocarbon boom that is attached to the inside of the filter basket. The
hydrocarbon boom is fastened to rails on two opposite sides of the basket (vertical rails).
Assess the color and condition of the boom using the following information in the next
bullet point. If replacement is required install and fasten on a new hydrocarbon boom.
Booms can be ordered directly from the manufacturer.
Follow is a replacement indication color chart for the hydrocarbon booms:
The last step is to replace the grate and remove all traffic control.
All removed debris and pollutants shall be disposed of following local and state
requirements.
Disposal requirements for recovered pollutants may vary depending on local guidelines. In
most areas the sediment, once dewatered, can be disposed of in a sanitary landfill. It is not
anticipated that the sediment would be classified as hazardous waste.
In the case of damaged components, replacement parts can be ordered from the
manufacturer. Hydrocarbon booms can also be ordered directly from the manufacturer as
previously noted.
Excellent
Condition
Good Condition
Minimal Capacity
Replacement Required
Bio ~Clean
A Forterra Company
5 | Page
Maintenance Sequence
Insert the vacuum hose down into the filter basket and suck out debris. Use a pressure washer to assist in vacuum removal.
Pressure wash off screens.
Remove grate and set up vacuum truck to clean the filter basket.
Bio ~Clean
A Forterra Company
6 | Page
For Maintenance Services or
Information Please Contact Us At:
760‐433‐7640
Or Email:
info@biocleanenvironmental.com
Remove the hydrocarbon boom
that is attached to the inside of the
filter basket. The hydrocarbon
boom is fastened to rails on two
opposite sides of the basket
(vertical rails). Assess the color and
condition of the boom using the
following information in the next
bullet point. If replacement is
required install and fasten on a
new hydrocarbon boom.
Close up and replace the
grate and remove all traffic
control. All removed debris
and pollutants shall be
disposed of following local
and state requirements.
Bio ~Clean
A Forterra Company
For Office Use Only
(city) (Zip Code)(Reviewed By)
Owner / Management Company
(Date)
Contact Phone ( )_
Inspector Name Date / / Time AM / PM
Weather Condition Additional Notes
Site
Map #
Long:
Storm Event in Last 72-hours? No Yes
GPS Coordinates of
Insert Catch Basin Size
Evidence of
Illicit
Discharge?
Trash
Accumulation
Type of Inspection Routine Follow Up Complaint Storm
Lat:
Long:
Lat:
Long:
Sediment
Accumulation
Office personnel to complete section to the
left.
Functioning Properly or
Maintenance Needed?
398 Via El Centro, Oceanside, CA 92058 P. 760.433.7640 F. 760.433.3176
Comments:
Foliage
Accumulation
Long:
Lat:
Long:
Lat:
3 Lat:
2
1
Long:
Inspection and Maintenance Report
Catch Basin Only
Signs of Structural
Damage?
5
4
6 Lat:
Lat:
Lat:
Long:
7
Lat:
Long:
10
8
Long:
Project Name
Project Address
12 Lat:
11 Lat:
Long:
Long:
Bio ~Clean
A Forterra Company
-----
□ □ □ □ □
ATTACHMENT 3
City standard Trash Capture BMP Exhibit
[Use the City’s standard Trash Capture BMP Plan.]
INSTALL BIOCLEAN
BIO-GRATE-KMF
36-36-24 TRASH CAPTURE DEVICE
PER MANUFACTURER'S SPECIFICATIONS
INSTALL BIOCLEAN
BIO-GRATE-KMF
36-36-24 TRASH CAPTURE DEVICE
PER MANUFACTURER'S SPECIFICATIONS
2 ADD NEW SHEET 6
7/1/22 SB
24
"
2
2
ADD TRASH CAPTURE BMP DETAILS
2
\
\
\
I
UNOERDRAIN
CONNECTION 6" PIPE (PERF.)
,,-r--.....,6" X 6" PRECAST-CATCH BASIN PER MODIFIED
PLAN
DRSD D-08 TYPE G-2 SURFACE SLOT
WIDTH = 2'
HEIGHT = 0.25'
ELEVATION ABOVE FG= 0.5'
j\ '18" MIN WELL L-'imAINED soiL v----....
12·
ORIFICE PLATE MIN. SCUARE
DIMENSIDNS-1.0 FT GREATER
THAN PIPE DIA. HOT-DIP
GALVAN I ZED PLATE AFTER
HOLES HAVE BEEN DRILLED
NOTE: SEE SHEET 3-4 FOR BASIN LOiC,,:OONS-...._/
i/2" MAX ,INFlOW PIPE,
=)c.~~v ,--ORIFICE DIAMETER
(SEE TABLE RIGHT) ' 0 -------3/8• DIA. HOLE
FLOW CONTROL ORIFICE PLATE
**1 SS ! L --"" LA-.:ER ,AROUND ALL PIPES!
IMPERMEABLE LINER ~BM-P~-0-RI-FlC_E_S_lZE-,_ SIDES AND BOTTOM
1 2.so· UNDERDRAIN
CONNECTION
6" PERF. PVC
PRIVATE BIOFILTRATION OUTLET DETAIL
NTS
PLATT: SEE DET. THIS
I
40 20 0 40
e 1·1 ' •,1.1-ln .I
• ,-SCALE: 1 "· =
RETENTION AREA
SHALL BE LEVEL
AND DEPRESSED
A MINIMUM OF 18"
f;ROM THE
SURROUNDING ,
GRADE
EXTEND LINER TO A TLEAST--~
6" HIGHER THAN RISER
STRUCTURE OVERFLOW
INLET ELEVATION
INSTALL ,3" LAYER OF
3 /8" GRAVEL AT BIOMIX
SOil /GRAVEL. INTERFACE
6'" PERFORATE
PVC PIPE
80
□-I Ft
40'
BMP ID # BMP TYPE SYMBOL CASQA NO.
HYDROMODIFICATION & TREATMENT CONTROL
CD
BIOFIL TRA TION
AREA
SOURCE CONTROL/LID
® CLrRB INt'ET
FILTER
(BIOCLEAN
OR EQUAL)
0 -0 TRASH ENCLOSURE
STENCILS
TRASH CAPTURE
&fffi!ij
oP
NO DUMPING
DRAINS TO OCEAN
5 GRATE INLET FILTER
PARTY RESPONSIBLE FOR MAINTENANCE:
NAME CARLSBAD OAKS EAST VENTURES, LP
TC-32
S0-32
SD-13
ADDRESS:· 3575 KEN~ON STREET
SAN DIEGO, CA 92110 CONTACT TED JCHANG
PHONE NO.: (619)'=223-1663
PLAN PREPARED BY:
NAME: RJD
COMPANY: REC CON.SULIANTS INC.
ADDRESS:, 2442 SECOND, AVENUE:
SAN DIEGO, CA '92101
.
PHONE NO.: (619)-326-6021
120
at 71
NOTES:
SOIL MIX PER ClTY QF
SAN DIEGO LID MANUAL
SEAL
PLANTING PER CITY OF SAN DIEGO APPROVED
PLANT LIST -SAN _ DIEGO SEDGE ( GRASS)
& MULEFAT (SHRUBS)
NLET WITH APPROVED, GRATE
36," X 36" PRECAST CATCH BASIN PER
MODIFIED SDRSO D-08 TYPE G-2
. ~\..o'II
,._c'<.--
c,\l'<-~
*18" MIN WELL
DRAINED SOIL
MPERMEABLE LINER
SIDies AND BOTTOM
OUTLET PIPE TO EXIST STOR
DRAIN SYSTEM.
**12" CLASS II GRAVEL
LAYER AROUND ALL
PIPES
SLOPE BOTTOM OFF BIOFIL TRATION
BASIN TOWARDS SUBDR.AIN
TG PER PLAN
1 SECTION 1, . 1i
"' ii '1-
36' _ 36," RRECAST CATCH
E! IN AS PER MODIFIED
SD SD D-08 TYPE G-2
CONTROL ORIFICE
SEE DET. THIS
-Ol/TFALL PIPE,
SIZE PER PLAN
FLOW
'BIOFIL TRA TION ENGINEERED SOIL SflALL BE MTNTM-UM 18" DEEP "SANDY LOAM"
SOIL MIX WITH NO MORE THAN 5% CLAY CONTENT. THE MIX SflALL CONTAIN 50-60%
SAND, 20-30% COMPOST OR HARDWOOD MULCfl, AND 20-30% TOPSOIL.
"3/4" CRUSHED ROCK LAYER. 12" GRAVEL DEPTH VARY PER SWQMP #16-21
PRIVATE BIOFILTRATION DETAIL FOR BMP
NTS
/\
DATE INITIAL
BMP 'TABLE
QUANTITY
7,427 Sf
1 [)\
2 EA
8 EA
1 EA
DRA\\iNG NO. SHEET NO.(S)
495-1A 3, 4
495-'1A 4
495-1A 3, 5
495-1A 3, 4
495-1A 3
INSPECTION *
FREQUENCY
QUARTERLY
AS-NEEDED
S S A
RECOMMENDATIONS OR THESE PLANS.
MAINTENANCE *
FREQUENCY
SEMI-ANNUALLY
AS-NEEDED
2. NO CHANGES TO THE PROPOSED BMPS ON THIS SHEET VviTHOUT PRIOR
APPROVAL FJlQM THE CITY ENGINEER.
3. NO SUBSTITUTIONS TO 1HE IMA TERIAL OR TYPES OR PLANTING TYPES
WITHOUT PRJOR, APPROVAL FROM THE Clfi ENGINEER.
4. NO OCCUPANCY \\ill BE GRANTED UNTIL THE CITY INSPECTION STAFF
HAS INSPECTED THIS PROJECT FOR APPROPRIATE BMP CONSTRUCTION
AND INSTALLATION.
5. REFER TO MAINTENANCE AGREEMENT DOCUMENT.
6. SEE PROJECT SWMP FOR ADDITIONAL INFORMATION.
4'' PVC SCREW' CAP ,-
RIM IS '12"' ABOVE
GRADE
4" NON
PERFORATED
STANJl.PIPE
"12" CLASS II GRAVEl
LAYE~ AROUND AILL ~IPES
WATER TIGHT
CAP ON
TmMINAL
END OF PIPE
l/SE 45' WYE AND FITTING OR
EQUIVALENT DIRECTIONAL
CLEANOUT TO_CONNECT
DERDRAIN TO STANDPIPE
=--18" MIN WELL
DRAINED SOIL
INSTALL 3" LA-.:ER
OF 3 /B" GRAVEL
CONNECT PIPE [0
DOWNSTREAM! CLEl<N
Ol/T.
6" PERFORATED
., PVC UNDERDRAIN
, ~NATIVE S~IL
IMPERMEABLE LINER
_SJDES AND BOTTOM
BIOF IL TRA TION CLEAN OUT DETAIL
Civil Engineering• Environmental
244 2 Second Avenue
So11 D,ego, Cl\ 92101
(619)232-9200 (6 19)232~9210 Fa,
Consultants, Inc.
W I CITY OF CARLSBAD
ENGINEERING DEPARTMENT
I SH~ETS I
SINGLE SHEET BMP SITE PLAN
CARLSBAD OAKS EAST
L0:'f-24
RECORD COPY PROJECT NO.
.SDP IG, -r:JS Jj DRAWING NO. DATE INITIAL QATE INITIAL
ENGINEER OF WORK REVISION DESCRIPTION OTHER APPROVAL CITY APPROVAL INITIAL
11/2~/f&
DATE I 4q5 -IA I