HomeMy WebLinkAboutSDP 2022-0003; FPC RESIDENTIAL - SB 330; STORM WATER QUALITY MANAGEMENT PLAN; 2022-11-29CITY OF CARLSBAD
PRELIMINARY
PRIORITY DEVELOPMENT PROJECT (PDP)
STORM WATER QUALITY MANAGEMENT PLAN (SWQMP)
FPC RESIDENTIAL
APN: 214-160-25, 214-171-11, 214-160-28
ENGINEER OF WORK:
PREPARED FOR:
H.G. Fenton
7577 Mission Valley Rd.
San Diego, CA, 92108
Telephone: (619) 400-0120
PREPARED BY:
DATE:
11.29.2022
Hunsaker & Associates, San Diego Inc.
9707 Waples Street
San Diego, CA 92121
(858) 558-4500
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 (when applicable)
Attachment 1d: Categorization of Infiltration Feasibility Condition (when applicable)
Attachment 1e: Pollutant Control BMP Design Worksheets / Calculations
Attachment 2: Backup for PDP Hydromodification Control Measures
Attachment 2a: Hydromodification Management Exhibit
Attachment 2b: Management of Critical Coarse Sediment Yield Areas
Attachment 2c: Geomorphic Assessment of Receiving Channels
Attachment 2d: Flow Control Facility Design
Attachment 3: Structural BMP Maintenance Thresholds and Actions
Attachment 4: Single Sheet BMP (SSBMP) Exhibit
CERTIFICATION PAGE
Project Name: FPC RESIDENTIAL
Project ID:
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
Alisa S. Vialpando
Hunsaker & Associates - San Diego, Inc.
PROJECT VICINITY MAP
FPC Residential
7200-7294 Ponto Drive Carlsbad, California 92011
214-160-25 and 214-171-11
240,400 5.52 Including Public Improvements
179,867 4.13
214-160-28
77,101
179,867
100
Alisa S. Vialpando Civil Engineer, President
11/29/2022
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)
Existing Impervious Area
(subset of Parcel Area)________ Acres (____________ Square Feet)
Area to be disturbed by the project
(Project Area)________ Acres (____________ Square Feet)
Project Proposed Impervious Area
(subset of Project Area)________ Acres (____________ Square Feet)
Project Proposed Pervious Area
(subset of Project Area)________ Acres (____________ Square Feet)
Note: Proposed Impervious Area + Proposed Pervious Area = Area to be Disturbed by the
Project.
This may be less than the Parcel Area.
214-160-25 and 214-171-11, 214-160-28
FPC Residential
4.64
1.77
202,221
77,101
5.52 240,400
4.13 179,867
1.39 60,533
The total disturbed area on site and offsite: 5.46 Acres
The disturb area offsite: (5.46-4.54 = 0.92 Acres)*
7200-7294 PONTO DRIVE, CARLSBAD,
CALIFORNIA 92011
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
NRCS 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:
The western lot north of Ponto Dr and east of Ponto Rd is currently occupied by a self-storage
facility, while the western lot is mostly undeveloped aside from two vacant structures.
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 western lot north of Ponto Drive and east of Ponto Road is currently occupied by
a self-storage facility while the western lot is mostly undeveloped aside from two va-
cant structures. The sites drainage area is approximately 10.13 acres including around
5.79 acres of offsite area. The elevation-range of the watershed is between 52 feet to
36 feet.
The runoff from the offsite drainage area and the eastern portion of the site is con-
veyed westerly via overland flow to enter the self storage facility, and then travel
through the facility v shaped driveways in a southwest direction to discharge into a de-
pression area at the southwest corner of the site and enter the existing dual 24" storm
drains crossing Ponto drive. The out-flow from the existing storm drain is conveyed
southerly to ultimately discharge into Batiquitos Lagoon
Description of Proposed Site Development and Drainage Patterns
Project Description / Proposed Land Use and/or Activities:
List/describe proposed impervious features of the project (e.g., buildings, roadways, parking
lots, courtyards, athletic courts, other impervious features):
List/describe proposed pervious features of the project (e.g., landscape areas):
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:
The site impervious feature will be buildings, driveways, Sidewalk, parking lots.
The site pervious features will be landscape areas.
The post-developed condition of the site will consist of improvements consisting of a multi-family residen-
tial development including housing units, driveways, access roads, sidewalks, and landscaped open spa-
ces. Additionally, the project proposes water quality facilities (Proprietary Biofiltration BMPs)to treat the
runoff from the site. The infrastructure will include streets and associated utilities including a storm drain
system (pipes, inlets, cleanouts) necessary to collect and convey site runoff through the project area.
Total Cut: 4,906 CY
Total Fill: 8,629 CY
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):
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
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
Nutrients
Heavy Metals
Organic Compounds
Trash & Debris
Oxygen Demanding
Substances
Oil & Grease
Bacteria & Viruses
Pesticides
Batiquitos Lagoon Toxicity
N/A
(X)
(X)
(X)
(P)
(P)
(P)
(X)
X = Anticipated
P = Potential
The general direction of flows for the subareas is relatively consistent with the existing condition. Unlike the existing conditions, the
redevelopment will collect the runoff with proposed inlets, convey it towards the southeast corner of the site, and will connect to the
existing 78” storm drain that runs southerly along the eastern boundary of the site. The 78” storm drain continues southerly and con-
nects into a 84” existing storm drain before ultimately discharging into the Batiquitos Lagoon.
Not listed
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:
Exempt per "Hydromodification Exemption analysis for selected Carlsbad watershed" dated 09/17/2015
by Wayne Chang
N/A. HMP Exempt
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.
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:
Discussion / Additional Information: (optional)N/A
Other Site Requirements and Constraints
When applicable, list other site requirements or constraints that will influence storm water
management design, such as zoning requirements including setbacks and open space, or City
codes governing minimum street width, sidewalk construction, allowable pavement types, and
drainage requirements.
Optional Additional Information or Continuation of Previous Sections As Needed
This space provided for additional information or continuation of information from previous
sections as needed.
E-36 Page 1 of 4 Revised 02/22
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
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)--
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
FPC Residential
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
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:
are not proposed will be labeled with stenciling or signage to
discourage dumping (SC-F)
Interior work surfaces, floor drains & are not proposed will not discharge directly or indirectly to the MS4
or receiving waters
Drain lines (e.g. air conditioning, boiler, are not proposed will not discharge directly or indirectly to the MS4
or receiving waters
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):
Additional comments for SC-6 BMPs
General Information and Maintenance Considerations
Proposed project is a multi family apartment complex.
There will be no outdoor material storage and/or outdoor work areas.
This project does not propose food service areas, refuse areas, industrial processes and
fuel dispensing areas are not proposed for this project.
Vehicle/equipment repair, maintenance and cleaning are discouraged.
On site storm drain inlets
All inlets are shown on exhibits.
All inlets will be marked with the words “No dumping! Flows to Bay” or similar.
Inlet markings will be maintained; periodically, markings will be re-painted and replaced.
Storm water pollution prevention information will be provided to new owners, lessees, or
operations.
Need for future indoor & structural pest control
Proposed building will integrate features that discourage entry of pests.
Integrated pest management information will be provided to owners, lessees, and
operators.
Landscape/outdoor pesticide use
The Final Landscape Plans will accomplish the following.
Landscape design will: minimize irrigation and runoff, promote surface infiltration where
appropriate, and minimize the use of fertilizers and pesticides that can contribute to storm
water pollution.
Pest resistant plants will be implemented, especially adjacent to hardscape.
Plants appropriate to site soils, slopes, climate, sun, wind, rain, land use, air movement,
ecological consistency, and plant interactions will be selected to ensure successful
establishment.
Landscaping will be maintained using minimum or no pesticides.
Refuse areas
An adequate number of receptacles will be provided to accommodate tenants.
Receptacles will be inspected regularly and repaired/replaced if leaks are present.
In conjunction with SC-5 (i.e. trash enclosure will be covered), receptacles will be covered.
“No hazardous materials” signs will be posted maintained.
Refuse Areas will be inspected daily to ensure that litter and spills will be cleaned up
immediately. Spill control materials will be available onsite.
Fire sprinkler test water
Fire sprinkler test water will be plumbed to sanitary sewer
For plazas, sidewalks, and parking lots
Plazas, sidewalks, and parking lots will be swept regularly to prevent the accumulation of
litter and debris
Debris from pressure washing will be collected to prevent non-stormwater discharge.
Wash-water containing any cleaning agent or degreaser will be collected and discharged
to the sanitary sewer.
E-36 Page 4 of 4 Revised 02/22
Form Certification
This E-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:
11/29/2022
Alisa S. Vialpando
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 construc-
tion 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.
Step 1.
Determine DCV for each DMA per SD County Worksheet B.1.
A. 0.57 in rainfall depth was determined per 85th percentile 24-hr Isopluvial map
B.Delineate Tributary area for each BMP
C. determine runoff factor for each DMAD. for DMA5.1-3, tree wells were proposed to retain the entire DCV, except for
DMA-5-3 and a hybrid of proprietary biofiltration (MWS or equivalent) and a tree well
is proposed to meet water quality requirements.
Step 2.
Worksheet B.2 was used to determine the minimum retention requirements for each
DMA. Per the Preliminary Infiltration Feasibility Study, proposed Multi-Family
Residential Development, 7200-7294 Ponto Drive, Carlsbad, California. Full
infiltration is infeasible due to to the loss of dwelling units. A density bonus waiver
has been requested.
Step3.
Form I-7 (harvest and Use Feasibility Checklist), Harvest has been deemed infeasible.
Furthermore, the proposed site improvements, and the potential issue with infiltration occurring so close to the building foundation limited the structural BMPs footprint. For
these reasons, we decided to incorporate proprietary Type BF-3 BMPs (Proprietary
Biofiltration BMPs).
Worksheet B.6-1 was used to calculate the treatment flow rate for each BMPThe retained volume within each DMA was calculated and minimum retention require-
ments were met.
Design of Off-site BMP (DMA5)
Due to limited space, Street Trees were implemented, per Appendix E.1 of the BMP Design Manual to ensure that the contributing drainage area will meet storm water quality requirements without implementing Structural BMPs .
Structural BMP Summary Information
[Copy this page as needed to provide information for each individual proposed
structural BMP]
Structural BMP ID No.
DWG _________ Sheet No. __________
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
Combined pollutant control and hydromodification control
Pre-treatment/forebay for another structural BMP
Other (describe in discussion section below)
Discussion (as needed):
Type of BMP: BF-3, Proprietary Biofiltration BMP.
Description of BMP: Modular Wetland® Model MWS-L-8-8 (or Equivalent)
BF-3-1
Structural BMP Summary Information
[Copy this page as needed to provide information for each individual proposed
structural BMP]
Structural BMP ID No.
DWG _________ Sheet No. __________
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
Combined pollutant control and hydromodification control
Pre-treatment/forebay for another structural BMP
Other (describe in discussion section below)
Discussion (as needed):
BF-3-2
Type of BMP: BF-3, Proprietary Biofiltration BMP.
Description of BMP: Modular Wetland® Model MWS-L-4-21 (or Equivalent)
Structural BMP Summary Information
[Copy this page as needed to provide information for each individual proposed
structural BMP]
Structural BMP ID No.
DWG _________ Sheet No. __________
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
Combined pollutant control and hydromodification control
Pre-treatment/forebay for another structural BMP
Other (describe in discussion section below)
Discussion (as needed):
BF-3-3
Type of BMP: BF-3, Proprietary Biofiltration BMP.
Description of BMP: Modular Wetland® Model MWS-L-4-4 (or Equivalent)
Structural BMP Summary Information
[Copy this page as needed to provide information for each individual proposed
structural BMP]
Structural BMP ID No.
DWG _________ Sheet No. __________
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
Combined pollutant control and hydromodification control
Pre-treatment/forebay for another structural BMP
Other (describe in discussion section below)
Discussion (as needed):
BF-3-4
Type of BMP: BF-3, Proprietary Biofiltration BMP.
Description of BMP: Modular Wetland® Model MWS-L-8-16 (or Equivalent)
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.
ypically 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 1a
DMA Exhibit
Use this checklist to ensure the required information has been included on the DMA
Exhibit:
The DMA Exhibit must identify:
Underlying hydrologic soil group
Approximate depth to groundwater
Existing natural hydrologic features (watercourses, seeps, springs, wetlands)
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)
STOP
B L D G . 1 6
B L D G . 1 7
B L D G . 1 8
B L D G . 1 9
P =4 5 .0FF=4 5 .5
P =4 3 .6 5FF=4 4 .1 5
P =4 4 .0FF=4 4 .5
P =4 4 .7 5FF=4 5 .2 5
P =4 5.4 5FF=4 5 .9 5
P =4 5.9 5FF=4 6 .4 5
P =4 5 .5 5FF=4 6 .0 5
P =4 4.8 5FF=4 5 .3 5
P=4 1.75FF=4 2.25
P =4 0 .25FF=4 0 .7 5
P=41.35
FF=41.85
P=41.45
FF=41.95
P=44.05
FF=44.55
P=43.95
FF=44.45
P=44.15
FF=44.65
P=44.05
FF=44.55
P =4 3 .6 5FF=4 4 .1 5
P =4 4 .5FF=4 5 .0
P=42.65
FF=43.15
P=42.55FF=43.05
OS-A
B L D G . 2 0
B L D G . 2 1
B L D G . 2 2 B L D G . 2 3
B L D G . 4
BLDG. 5
BLDG. 8
BLDG. 9
BLDG. 10
BLDG. 11
BLDG. 12
BLDG. 13
B L D G . 1 4
B L D G . 1 5
BLDG. 1
OS-B
OS-A
P=44.45FF=44.95
P=42.15
FF=42.65
P=41.25FF=4 1.75
P=43.95FF=44.45
P=43.05FF=43.55
BLDG. 2
BLDG. 6
B L D G . 3
S E E D E T AI L D - S H E E T 4
F O R O F F S I T E P RIV A T E S E W E R C O N N E C T I O N
P=41.5
FF=42.0
P=40.5
FF=41.0
P=40.0
FF=40.5
P=41.5
FF=42.0
P=40.5
FF=41.0
P=40.0
FF=40.5
BLDG. 7
P=41.5
FF=42.0
P=40.0FF=40.5
P=40.5
FF=41.0
P=40.85
FF=41.35
P=40.95
FF=41.45
P=43.55
FF=44.05
P=43.45
FF=43.90
P=43.65
FF=44.15
EXIST. PONT O RD
EXIST. PONTO DR
N O R T H S A N D I E G O C O U N T Y
T R A N S I T D E V E L O P M E N T
EXIST. PONTO DR
NCTD R.O .W.
PVT. BEACH WAY
DMA 1
55,025 SF
DMA 2
56,812 SF
DMA 4
78,289 SF
DMA 3
2,285 SF
DMA 5-3
22,288 SF
DMA 5-2
8,999 SF
DMA 5-1
7,791 SF
DMA 5-4
6,663 SF
OF
1
1
PREPARED BY:
CITY OF CARLSBAD, CALIFORNIA
FPC RESIDENTIAL
DMA MAP
LEGEND:
PROJECT BOUNDARY...........................................................................................
DMA BOUNDARY....................................................................................................
DAYLIGHT...............................................................................................................
PROPOSED STORM DRAIN..................................................................................
EXISTING STORM DRAIN......................................................................................
FLOW LINE.............................................................................................................
SUBAREA ACREAGE.............................................................................................
DMA ICON...............................................................................................................
IMPERVIOUS - ROAD............................................................................................
IMPERVIOUS - ROOF............................................................................................
IMPERVIOUS - SIDEWALK....................................................................................
PERVIOUS AREAS.................................................................................................
INLET......................................................................................................................
HYDROLOGIC SOIL TYPE.....................................................................................
POINT OF COMPLIANCE.......................................................................................
STRUCTURAL BMP\ MWS UNIT............................................................................
TREE WELL (SD-A)......................................................................................
SYMBOL:
SITE DESIGN BMPs:
SD-2 CONSERVE NATURAL AREAS, SOILS, VEGETATION
SD-3 MINIMIZE IMPERVIOUS AREAS
SD-4 MINIMIZE SOIL COMPACTION
SD-5 IMPERVIOUS AREA DISPERSION
SD-7 LANDSCAPING WITH NATIVE OR DROUGHT TOLERANT SPECIES
SOURCE CONTROL BMPs:
SC-1 PREVENTION OF ILLICIT DISCHARGES TO MS4
SC-2 STORM DRAIN STENCILING OR SIGNAGE
SC-6 ADDITIONAL BMPS BASED ON POTENTIAL SOURCES OF
RUNOFF POLLUTANTS
SC-6A ON-SITE STORM DRAIN INLETS
SC-6D NEED FOR FUTURE INDOOR & STRUCTURAL PEST
CONTROL
SC-6E LANDSCAPE/OUTDOOR PESTICIDE USE
SC-6Q PLAZAS, SIDEWALKS, AND PARKING LOTS
UNDERLYING SOIL GROUP : B
APPROXIMATE DEPTH TO GROUNDWATER: 10' < GW Deprh < 20'
VICINITY MAP
SITEPROJECT
REDEVELOPMENT
DMA 4
STORM DRAIN STENCIL PER DS-1
Attachment 1b
Tabular Summary of DMAs
AREA BREAKDOWN
DMA CALCULATIONS
Imp. RF
Pervious
RF % Imp
DMA1 Fraction of
Total Imp Area
Pervious
Area
Summation
RF x A
DMA-2 Fraction of
Total Imp Area
Pervious
Area
Summation
RF x A
DMA-3 Fraction
of Total Imp Area
Pervious
Area
Summation
RF x A
LANDSCAPE 0.90 0.10 0 14222 0.04 0 14222 1422 15775 0.04 0 15775 1578 325 0.02 0 325 32
ROOF 0.90 0.10 100 22885 0.54 22885 0 20596 23077 0.54 23077 0 20769 0 0.00 0 0 0
ROAD 0.90 0.10 100 13517 0.32 13517 0 12165 12052 0.28 12052 0 10847 1585 0.67 1585 0 1427
DRIVEWAY 0.90 0.10 100 1507 0.04 1507 0 1356 1849 0.04 1849 0 1664 0 0.00 0 0 0
SIDEWALK 0.90 0.10 100 2894 0.07 2894 0 2605 4059 0.09 4059 0 3653 754 0.32 754 0 679
55025 1.00 40803 14222 38145 56812 1.00 41037 15775 38511 2664 1.00 2339 325 2138
%Imperv 74.15 Weighted C =0.69 72.23 Weighted C =0.68 87.82 Weighted C =0.80
Imp. RF
Pervious
RF % Imp DMA 4 Fraction of
Total Imp Area
Pervious
Area
Summation
RF x A DMA-5-1 Fraction of
Total Imp Area
Pervious
Area
Summation
RF x A
SQFT SQFT SQFT SQFT SQFT SQFT
LANDSCAPE 0.90 0.10 0 22136 0.04 0 22136 2214 1478 0.03 0 1478.00 148
ROOF 0.90 0.10 100 29824 0.51 29824 0 26841 0 0.00 0 0.00 0
ROAD 0.90 0.10 100 16670 0.28 16670 0 15003 5017 0.77 5017 0.00 4515
DRIVEWAY 0.90 0.10 100 2261 0.04 2261 0 2035 0 0.00 0 0.00 0
SIDEWALK 0.90 0.10 100 7398 0.13 7398 0 6658 1296 0.20 1296 0.00 1166
78289 1.00 56153 22136 52751 7791 1.00 6313 1478 5830
%Imperv 71.73 Weighted C =0.67 81.03 Weighted C =0.75
Imp. RF
Pervious
RF % Imp DMA-5-2 Fraction of
Total Imp Area
Pervious
Area
Summation
RF x A DMA-5-3 Fraction of
Total Imp Area
Pervious
Area
Summation
RF x A DMA-5-4 Fraction
of Total Imp Area
Pervious
Area
Summation
RF x A
SQFT SQFT SQFT SQFT SQFT SQFT SQFT SQFT SQFT
LANDSCAPE 0.90 0.10 0 697 0.01 0 697.00 70 2497 0.01 0 2497.00 250 1535 0.03 0 1535.00 154
ROOF 0.90 0.10 100 0 0.00 0 0.00 0 0 0.00 0 0.00 0 0 0.00 0 0.00 0
ROAD 0.90 0.10 100 5917 0.71 5917 0.00 5325 14952 0.75 14952 0.00 13457 2641 0.50 2641 0.00 2377
DRIVEWAY 0.90 0.10 100 0 0.00 0 0.00 0 0 0.00 0 0.00 0 0 0.00 0 0.00 0
SIDEWALK 0.90 0.10 100 2385 0.28 2385 0.00 2147 4839 0.24 4839 0.00 4355 2487 0.47 2487 0.00 2238
0
8999 1.00 8302 697 7542 22288 1.00 19791 2497 18062 6663 1.00 5128 1535 4769
%Imperv 92.25 Weighted C =0.84 88.80 Weighted C =0.81 76.96 Weighted C =0.72
11/29/2022 R:\1744\Hyd\SWQMP\Calcs\07-05-2022-1744-Volume 5 - City BMP Sizing Worksheet.xlsx
Attachment 1c
Attachment 1c Form I-7, Harvest and Use Feasibility
Toilet and urinal flushing demand:
Irrigation demand:
Total = 515 + 354 = 869 cft
6231 cft
Attachment 1d
Form I-8, Categorization of Infiltration Feasibility Condition
Infiltration testing in the upper soils yielded highly variable preliminary design
infiltration rates ranging between 0.0 to 0.55 inches per hour. Due to the presence of
less permeable layers within the Old Paralic Deposits, infiltrating water may flow
vertically until encountering a less permeable layer, where the water may then flow
laterally. Determining the ultimate flow paths would be very difficult.
Attachment 1e
Pollutant Control BMP Design Worksheets / Calculations
Project
Category #Description i ii iii iv v vi vii viii ix x Units
1 Drainage Basin ID or Name DMA 1 DMA 2 DMA 3 DMA 4 DMA 5-1 DMA 5-2 DMA 5-3 DMA 5-4 unitless
2 85th Percentile 24-hr Storm Depth 0.57 0.57 0.57 0.57 0.57 0.57 0.57 0.57 inches
3 Impervious Surfaces Not Directed to Dispersion Area (C=0.90) 40,803 41,037 2,339 56,153 6,313 8,302 19,791 5,128 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)14,222 15,775 325 22,136 1,478 697 2,497 1,535 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 No No No Yes Yes Yes Yes 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 7 2 3 4 #
19 Average Mature Tree Canopy Diameter 10 20 25 15 ft
20 Number of Rain Barrels Proposed per SD-E 0 0 0 0 #
21 Average Rain Barrel Size 0 0 0 0 gal
22 Total Tributary Area 55,025 56,812 2,664 78,289 7,791 8,999 22,288 6,663 0 0 sq-ft
23 Initial Runoff Factor for Standard Drainage Areas 0.69 0.68 0.80 0.67 0.75 0.84 0.81 0.72 0.00 0.00 unitless
24 Initial Runoff Factor for Dispersed & Dispersion Areas 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless
25 Initial Weighted Runoff Factor 0.69 0.68 0.80 0.67 0.75 0.84 0.81 0.72 0.00 0.00 unitless
26 Initial Design Capture Volume 1,803 1,835 101 2,492 278 359 858 228 0 0 cubic-feet
27 Total Impervious Area Dispersed to Pervious Surface 0 0 0 0 0 0 0 0 0 0 sq-ft
28 Total Pervious Dispersion Area 0 0 0 0 0 0 0 0 0 0 sq-ft
29 Ratio of Dispersed Impervious Area to Pervious Dispersion Area n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a ratio
30 Adjustment Factor for Dispersed & Dispersion Areas 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 ratio
31 Runoff Factor After Dispersion Techniques 0.69 0.68 0.80 0.67 0.75 0.84 0.81 0.72 n/a n/a unitless
32 Design Capture Volume After Dispersion Techniques 1,803 1,835 101 2,492 278 359 858 228 0 0 cubic-feet
33 Total Tree Well Volume Reduction 0 0 0 0 280 360 870 400 0 0 cubic-feet
34 Total Rain Barrel Volume Reduction 0 0 0 0 0 0 0 0 0 0 cubic-feet
35 Final Adjusted Runoff Factor 0.69 0.68 0.80 0.67 0.00 0.00 0.00 0.00 0.00 0.00 unitless
36 Final Effective Tributary Area 37,967 38,632 2,131 52,454 0 0 0 0 0 0 sq-ft
37 Initial Design Capture Volume Retained by Site Design Elements 0 0 0 0 280 360 870 400 0 0 cubic-feet
38 Final Design Capture Volume Tributary to BMP 1,803 1,835 101 2,492 0 0 0 0 0 0 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 ii iii iv v vi vii viii ix x Units
1 Drainage Basin ID or Name DMA 1 DMA 2 DMA 3 DMA 4 DMA 5-1 DMA 5-2 DMA 5-3 DMA 5-4 --unitless
2 85th Percentile Rainfall Depth 0.57 0.57 0.57 0.57 0.57 0.57 0.57 0.57 --inches
3 Predominant NRCS Soil Type Within BMP Location B B B B B B B B unitless
4 Is proposed BMP location Restricted or Unrestricted for Infiltration Activities? Restricted Restricted Restricted Restricted Unrestricted Unrestricted Restricted Restricted unitless
5 Nature of Restriction n/a n/a n/a n/a n/a n/a n/a n/a unitless
6 Do Minimum Retention Requirements Apply to this Project?Yes Yes Yes Yes Yes Yes Yes Yes yes/no
7 Are Habitable Structures Greater than 9 Stories Proposed?yes/no
8 Has Geotechnical Engineer Performed an Infiltration Analysis?yes/no
9 Design Infiltration Rate Recommended by Geotechnical Engineer in/hr
10 Design Infiltration Rate Used To Determine Retention Requirements 0.000 0.000 0.000 0.000 0.200 0.200 0.000 0.000 --in/hr
11 Percent of Average Annual Runoff that Must be Retained within DMA 4.5%4.5%4.5%4.5%37.0%37.0%4.5%4.5%--percentage
12 Fraction of DCV Requiring Retention 0.02 0.02 0.02 0.02 0.29 0.29 0.02 0.02 --ratio
13 Required Retention Volume 36 37 2 50 0 0 0 0 --cubic-feet
False
False
Automated Worksheet B.2: Retention Requirements (V2.0)
Advanced
Analysis
Basic Analysis
Result
No Warning Messages
Minimum Retention Caculation
DMA ID DMA 1 DMA 2 DMA 3 DMA 4 DMA 5-1 DMA 5-2 DMA 5-3 DMA 5-4
Required Retention Volume 36 37 2 50 0 0 0 0
MWS size 4-21 4-21 4-4 8-16 Tree Well Tree Well Tree Well Tree Well
Modular Wetland Media
Volume Calculation 477.2 477.2 92.94 881.61
Volume retained on site
within the 38% Void Space in
the MWS wetland Media
181.336 181.336 35.3172 335.0118
Min Reten Met yes yes yes yes
CALCULATION SHEET FOR EVAPOTRANSPIRATION INSIDE THE MODULAR
WETLAND SYSTEM LINEAR
The Modular Wetland System Linear is a biofiltration system utilizing a highly porous bioretention media
bed capable of maximizing pollutant removal and reducing volume through evapotranspiration. The
media used in the system, known as WetlandMedia, is composed of a non-organic material mix which
has a large percentage of interparticle and internal pore space:
Porosity:
Interparticle Void Percentage = 0.48
Internal Pore Space (inside particles) = 0.24
Total Void Space Percentage = 0.72
Benefits:
Physically Inert
Greater Surface Area & Porosity
Excellent Hydraulic Conductivity
Reduced Weight
Employs Ion Exchange
Absorbs High Levels of Moisture for Better Plant Propagation
Lightweight
Contains various oxides for removal of dissolved pollutants
Calculating Evapotranspiration:
Several studies have been performed to calculate the amount of evapotranspiration from the
biofiltration system. It has been found that it is a function of the moisture holding capacity of the
material and it’s relation to the “welting point”. Much of this work has been done by Geosyntec. In
2016, the City of San Diego released the new “Storm Water Standards Manual” and “Part 1: BMP Design
Manual – Appendices”. The manual and appendices was prepared by Geosyntec Consultants and
Michael Baker International.
Page G-23 of the above referenced manual provides the following method of calculating the amount of
evapotranspiration that can occur within the soil layer of biofiltration systems:
This process layer is typically composed of an amended soil or compost mix. Water that infiltrates
into this component is stored in the soil void space and is available for evapotranspiration via plant
roots or can percolate into the storage layer below. The following parameters are used:
Thickness: This parameter represents the depth of the amended soil layer.
Porosity: Ratio of pore space volume to soil volume.
Field Capacity: Pore water volume ratio after the soil has been drained.
Wilting Point: Pore water volume ratio after the soil has been dried.
Conductivity: This represents the saturated hydraulic conductivity.
Conductivity Slope: Rate at which conductivity decreases with decreasing soil moisture
content.
Suction Head: This represents the capillary tension of water in the soil.
Porosity, conductivity and suction head values as a function of soil texture were included in
Table G.1-5. The flow of water through partially saturated soil is less than under fully
saturated conditions. The SWMM program accounts for this reduced hydraulic conductivity
to predict the rate at which infiltrated water moves through a layer of unsaturated soil when
modeling groundwater or LID controls. The conductivity slope is a dimensionless curve-fitting
parameter that relates the partially saturated hydraulic conductivity to the soil moisture
content.
The Modular Wetland System Linear has the following parameters related to evapotranspiration as
described above:
Thickness: 20”
Porosity (interparticle + internal): 0.72
Field Capacity: 0.24 (50% of interparticle void space at 0.48 due to capillary tension + 100% of
internal void space at 0.24 = (50% x 0.48) + (100% x 0.24)): 0.48
Welting Point: 0.1 (standard from Manual based on field research done by Geosyntec)
Conductivity: > 395 in/hr
The following diagram taken from the San Diego Manual illustrates soil saturation, field capacity and
permanent wilting point:
The following worksheet can be used to calculate the amount of volume reduction provided through the
process of evapotranspiration in the Modular Wetland System Linear:
Sizing Method of Evapotranspiration Losses in Biofiltration BMPs
Project Name
Model #
Media Volume Calculations
1 Media bed width ft
2 Media bed length
ft
3 Media bed height
ft
4 Total media volume [Line 1 x 2 x 3] cu ft
Evapotranspiration Calculations
5 Porosity
6 Field Capacity
7 Welting Point
8 Water Storage Capacity [Line 4 x Line 5] cu ft
9 Field Capacity - Welting Point [Line 6 - Line 7]
10 Total Evapotranspiration [ Line 4 x Line 9] cu ft
This worksheet and supporting data can be used and can be included in your technical report. If you
have any questions please call us at 760-433-7640 or email us at info@modularwetlands.com
DCV CALCULATION
1 85th percentile 24-hr storm depth from Figure
B.1-1 d=0.57 inches
2 Area tributary to BMP (s)A=1.263 acres
3 Area weighted runoff factor (estimate using
Appendix B.1.1 and B.2.1)C=0.69 unitless
4 Street trees volume reduction TCV=0.00 cubic-feet
5 Rain barrels volume reduction RCV=0.00 cubic-feet
6 Calculate DCV= (3630 x C x d x A) - TCV - RCV DCV=1,803 cubic-feet
1 85th percentile 24-hr storm depth from Figure
B.1-1 d=0.57 inches
2 Area tributary to BMP (s)A=1.30 acres
3 Area weighted runoff factor (estimate using
Appendix B.1.1 and B.2.1)C=0.68 unitless
4 Street trees volume reduction TCV=0.00 cubic-feet
5 Rain barrels volume reduction RCV=0.00 cubic-feet
6 Calculate DCV= (3630 x C x d x A) - TCV - RCV DCV=1,835 cubic-feet
1 85th percentile 24-hr storm depth from Figure
B.1-1 d=0.57 inches
2 Area tributary to BMP (s)A=0.06 acres
3 Area weighted runoff factor (estimate using
Appendix B.1.1 and B.2.1)C=0.80 unitless
4 Street trees volume reduction TCV=0.00 cubic-feet
5 Rain barrels volume reduction RCV=0.00 cubic-feet
6 Calculate DCV= (3630 x C x d x A) - TCV - RCV DCV=101 cubic-feet
1 85th percentile 24-hr storm depth from Figure
B.1-1 d=0.57 inches
2 Area tributary to BMP (s)A=1.80 acres
3 Area weighted runoff factor (estimate using
Appendix B.1.1 and B.2.1)C=0.67 unitless
4 Street trees volume reduction TCV=0.00 cubic-feet
5 Rain barrels volume reduction RCV=0.00 cubic-feet
6 Calculate DCV= (3630 x C x d x A) - TCV - RCV DCV=2,492 cubic-feet
DMA 1: Design Capture Volume Worksheet B-2.1
DMA 2: Design Capture Volume Worksheet B-2.1
DMA 3: Design Capture Volume Worksheet B-2.1
DMA 4: Design Capture Volume Worksheet B-2.1
10/4/2022 R:\1744\Hyd\SWQMP\Calcs\07-05-2022-1744-Volume 5 - City BMP Sizing Worksheet.xlsx
DCV CALCULATION
1 85th percentile 24-hr storm depth from Figure
B.1-1 d=0.57 inches
2 Area tributary to BMP (s)A=0.18 acres
3 Area weighted runoff factor (estimate using
Appendix B.1.1 and B.2.1)C=0.75 unitless
4 Street trees volume reduction TCV=280.00 cubic-feet
5 Rain barrels volume reduction RCV=0.00 cubic-feet
6 Calculate DCV= (3630 x C x d x A) - TCV - RCV DCV=-3 cubic-feet
1 85th percentile 24-hr storm depth from Figure
B.1-1 d=0.57 inches
2 Area tributary to BMP (s)A=0.21 acres
3 Area weighted runoff factor (estimate using
Appendix B.1.1 and B.2.1)C=0.84 unitless
4 Street trees volume reduction TCV=360.00 cubic-feet
5 Rain barrels volume reduction RCV=0.00 cubic-feet
6 Calculate DCV= (3630 x C x d x A) - TCV - RCV DCV=-2 cubic-feet
1 85th percentile 24-hr storm depth from Figure
B.1-1 d=0.57 inches
2 Area tributary to BMP (s)A=0.51 acres
3 Area weighted runoff factor (estimate using
Appendix B.1.1 and B.2.1)C=0.81 unitless
4 Street trees volume reduction TCV=870.00 cubic-feet
5 Rain barrels volume reduction RCV=0.00 cubic-feet
6 Calculate DCV= (3630 x C x d x A) - TCV - RCV DCV=-12 cubic-feet
1 85th percentile 24-hr storm depth from Figure
B.1-1 d=0.57 inches
2 Area tributary to BMP (s)A=0.15 acres
3 Area weighted runoff factor (estimate using
Appendix B.1.1 and B.2.1)C=0.72 unitless
4 Street trees volume reduction TCV=400.00 cubic-feet
5 Rain barrels volume reduction RCV=0.00 cubic-feet
6 Calculate DCV= (3630 x C x d x A) - TCV - RCV DCV=-172 cubic-feet
DMA 5-1: Design Capture Volume Worksheet B-2.1
DMA 5-2: Design Capture Volume Worksheet B-2.1
DMA 5-3: Design Capture Volume Worksheet B-2.1
DMA 5-4: Design Capture Volume Worksheet B-2.1
11/29/2022 R:\1744\Hyd\SWQMP\Calcs\07-05-2022-1744-Volume 5 - City BMP Sizing Worksheet.xlsx
PROPRIETARY BIOFILTRATION FLOW-THRU SIZING CALCULATION
1 DCV DCV 1,803 cubic-feet
2 DCV Retained DCV Retained 0.00 cubic-feet
3 DCV Biofiltered DCV Biofiltered 0.00 cubic-feet
4 1.5 DCV requiring flow-thru (Line 1 - Line 2 -
0.67*Line 3)DCV flow-thru 1,803 cubic-feet
5 Adjustment Factor (Line 4 / Line1)AF=1.00 unitless
6 Design rainfall intensity i=0.2 in/hr
7 Area tributary to BMP(s)A=1.263 acres
8 Area-weighted runoff factor (estimate using
Appendix B.2)C=
0.69 unitless
9 Calculate Flow Rate = AF x (C x i x A)Q=0.174 cfs
10 Treamtent Flow Rate = 1.5 X Q Q=0.261 cfs
1)
2)
3)
MWS vault type 8-8, 3.95' Operation Head
Capacity = 0.268 cfs
DMA 1: Flow-thru Design Flows Worksheet B.6-1
Adjustment factor shall be estimated considering only retention and biofiltration BMPs
located upstream of flow-thru BMPs. That is, if the flow-thru BMP is upstream of the
project's retention and biofiltration BMPs then the flow-thru BMP shall be sized using an
adjustment factor of 1.
Volume based (e.g., dry extended detention basin) flow-thru treatment control BMPs shall be
sized to the volume in Line 4 and dlow based )e.g., vegetated swales) shall be sized to flow
rate in Line 9. Sand filter and media filter can be designed by either volume in :ie 4 or flow
Propietary BMPs, if used, shall provide certified treatment capacity equal to or greater than
the calculated flow rate in Line 9; certified treatment capacity per unit shall be consistent
with third party certifications.
10/4/2022 R:\1744\Hyd\SWQMP\Calcs\07-05-2022-1744-Volume 5 - City BMP Sizing Worksheet.xlsx
PROPRIETARY BIOFILTRATION FLOW-THRU SIZING CALCULATION
1 DCV DCV 1,835 cubic-feet
2 DCV Retained DCV Retained 0.00 cubic-feet
3 DCV Biofiltered DCV Biofiltered 0.00 cubic-feet
4 1.5 DCV requiring flow-thru (Line 1 - Line 2 -
0.67*Line 3)DCV flow-thru 1,835 cubic-feet
5 Adjustment Factor (Line 4 / Line1)AF=1.00 unitless
6 Design rainfall intensity i=0.2 in/hr
7 Area tributary to BMP(s)A=1.30 acres
8 Area-weighted runoff factor (estimate
using Appendix B.2)C=0.68 unitless
9 Calculate Flow Rate = AF x (C x i x A)Q=0.177 cfs
10 Treamtent Flow Rate = 1.5 X Q Q=0.266 cfs
1)
2)
3)
MWS curb type inlet 4-21
capaity = 0.268cfs
DMA 2: Flow-thru Design Flows Worksheet B.6-1
Adjustment factor shall be estimated considering only retention and biofiltration BMPs
located upstream of flow-thru BMPs. That is, if the flow-thru BMP is upstream of the
project's retention and biofiltration BMPs then the flow-thru BMP shall be sized using an
adjustment factor of 1.
Volume based (e.g., dry extended detention basin) flow-thru treatment control BMPs shall
be sized to the volume in Line 4 and dlow based )e.g., vegetated swales) shall be sized to
flow rate in Line 9. Sand filter and media filter can be designed by either volume in :ie 4 or
Propietary BMPs, if used, shall provide certified treatment capacity equal to or greater than
the calculated flow rate in Line 9; certified treatment capacity per unit shall be consistent
with third party certifications.
10/4/2022 R:\1744\Hyd\SWQMP\Calcs\07-05-2022-1744-Volume 5 - City BMP Sizing Worksheet.xlsx
PROPRIETARY BIOFILTRATION FLOW-THRU SIZING CALCULATION
1 DCV DCV 101 cubic-feet
2 DCV Retained DCV Retained 0.00 cubic-feet
3 DCV Biofiltered DCV Biofiltered 0.00 cubic-feet
4 1.5 DCV requiring flow-thru (Line 1 -
Line 2 - 0.67*Line 3)DCV flow-thru 101 cubic-feet
5 Adjustment Factor (Line 4 / Line1)AF=1.00 unitless
6 Design rainfall intensity i=0.2 in/hr
7 Area tributary to BMP(s)A=0.06 acres
8 Area-weighted runoff factor (estimate
using Appendix B.2)C=0.80 unitless
9 Calculate Flow Rate = AF x (C x i x A)Q=0.010 cfs
10 Treamtent Flow Rate = 1.5 X Q Q=0.015 cfs
1)
2)
3)
MWS curb type inlet 4-4
Capacity = 0.052
DMA 3: Flow-thru Design Flows Worksheet B.6-1
Adjustment factor shall be estimated considering only retention and biofiltration BMPs
located upstream of flow-thru BMPs. That is, if the flow-thru BMP is upstream of the
project's retention and biofiltration BMPs then the flow-thru BMP shall be sized using an
adjustment factor of 1.
Volume based (e.g., dry extended detention basin) flow-thru treatment control BMPs
shall be sized to the volume in Line 4 and dlow based )e.g., vegetated swales) shall be
sized to flow rate in Line 9. Sand filter and media filter can be designed by either volume
Propietary BMPs, if used, shall provide certified treatment capacity equal to or greater
than the calculated flow rate in Line 9; certified treatment capacity per unit shall be
consistent with third party certifications.
10/4/2022 R:\1744\Hyd\SWQMP\Calcs\07-05-2022-1744-Volume 5 - City BMP Sizing Worksheet.xlsx
PROPRIETARY BIOFILTRATION FLOW-THRU SIZING CALCULATION
1 DCV DCV 2,492 cubic-feet
2 DCV Retained DCV Retained 0.00 cubic-feet
3 DCV Biofiltered DCV Biofiltered 0.00 cubic-feet
4 1.5 DCV requiring flow-thru (Line 1 -
Line 2 - 0.67*Line 3)DCV flow-thru 2,492 cubic-feet
5 Adjustment Factor (Line 4 / Line1)AF=1.00 unitless
6 Design rainfall intensity i=0.2 in/hr
7 Area tributary to BMP(s)A=1.80 acres
8 Area-weighted runoff factor (estimate
using Appendix B.2)C=0.67 unitless
9 Calculate Flow Rate = AF x (C x i x A)Q=0.241 cfs
10 Treamtent Flow Rate = 1.5 X Q Q=0.361 cfs
1)
2)
3)
MWS curb type inlet 8-16
Capacity = 0.462
DMA 4: Flow-thru Design Flows Worksheet B.6-1
Adjustment factor shall be estimated considering only retention and biofiltration BMPs
located upstream of flow-thru BMPs. That is, if the flow-thru BMP is upstream of the
project's retention and biofiltration BMPs then the flow-thru BMP shall be sized using an
adjustment factor of 1.
Volume based (e.g., dry extended detention basin) flow-thru treatment control BMPs
shall be sized to the volume in Line 4 and dlow based )e.g., vegetated swales) shall be
sized to flow rate in Line 9. Sand filter and media filter can be designed by either volume
Propietary BMPs, if used, shall provide certified treatment capacity equal to or greater
than the calculated flow rate in Line 9; certified treatment capacity per unit shall be
consistent with third party certifications.
10/4/2022 R:\1744\Hyd\SWQMP\Calcs\07-05-2022-1744-Volume 5 - City BMP Sizing Worksheet.xlsx
732971
FPC RESIDENTIAL REDEVELOP
CARLSBAD, CA
BF-3-1
0.268
OFFLINE
N/A
N/A
18"
N/A
N/A
HDPE
CURB
N/A
36
42.04
PEDESTRIAN
3.9
2.3
1.0
0.268
36
* PRELIMINARY NOT FOR CONSTRUCTION
42.04
FPC RESIDENTIAL
CARLSBAD, CA
BF-3-2
0.268
TBD
TBD
N/A
N/A
12"PVC
N/A
N/AN/A
N/A
36.0
40.04 40.04 40.04
TBD
TBD
FPC RESIDENTIAL
CARLSBAD, CA
0.052
TBD
N/A N/A N/A
N/A N/A N/A
36.0 PVC 12"
40.50 40.50 40.50
BF-3-3
TBD
TBD
FPC RESIDENTIAL
CARSLBAD, CA
BF-3-4
12"
12"
PVC
PVC
40.0
35.0
41.80
TBD
2.0
40
35
41.8
STREET TREE DETAIL
PREPARED BY:
CITY CARLSBAD, CALIFORNIA
HUNSAKER& ASSOCIATES
Modular Wetlands® Characteristics and Capacity Table
California Full Capture Certified Capacities
Table 1
MWS Model
MTFR
(Trash/Sediment)
Trash Storage
Capacity
Sediment Storage
Capacity
(cfs)(ft3)(ft3)
MWS-L-4-4 0.052 10.7 2.7
MWS-L-4-6 0.073 15.0 3.7
MWS-L-4-6.33 0.073 16.7 4.2
MWS-L-4-6.5 0.073 17.6 4.4
MWS-L-4-8 0.115 19.8 4.9
MWS-L-4-13 0.144 32.0 8.0
MWS-L-4-15 0.175 32.0 8.0
MWS-L-4-17 0.206 32.0 8.0
MWS-L-4-19 0.237 32.0 8.0
MWS-L-4-21 0.268 32.0 8.0
MWS-L-6-8 0.147 30.5 7.6
MWS-L-8-8 0.23 36.7 9.2
MWS-L-8-12 0.346 56.3 14.1
MWS-L-8-16 0.462 85.7 21.4
MWS-L-8-20 0.577 94.0 23.5
MWS-L-8-24 0.693 123.4 30.8
MWS-L-10-20 0.693 90.0 22.5
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
See Hydromodification Management
Exhibit Checklist on the back of this
Attachment cover sheet.
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)
HYDROMODIFICATION EXEMPTION
ANALYSES
FOR
SELECT CARLSBAD WATERSHEDS
September 17, 2015
Wayne W. Chang, MS, PE 46548
Chang
P.O. Box 9496
Rancho Santa Fe, CA 92067
(858) 692-0760
Project Location
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
www.modularwetlands.com
Maintenance Guidelines for
Modular Wetland System - Linear
Maintenance Summary
o
o
o
o
o
System Diagram
www.modularwetlands.com
Maintenance Procedures
Screening Device
1. Remove grate or manhole cover to gain access to the screening device in the Pre-
Treatment Chamber. Vault type units do not have screening device. Maintenance
can be performed without entry.
2. Remove all pollutants collected by the screening device. Removal can be done
manually or with the use of a vacuum truck. The hose of the vacuum truck will not
damage the screening device.
3. Screening device can easily be removed from the Pre-Treatment Chamber to gain
access to separation chamber and media filters below. Replace grate or manhole
cover when completed.
Separation Chamber
1. Perform maintenance procedures of screening device listed above before
maintaining the separation chamber.
2. With a pressure washer spray down pollutants accumulated on walls and cartridge
filters.
3. Vacuum out Separation Chamber and remove all accumulated pollutants. Replace
screening device, grate or manhole cover when completed.
Cartridge Filters
1. Perform maintenance procedures on screening device and separation chamber
before maintaining cartridge filters.
2. Enter separation chamber.
3. Unscrew the two bolts holding the lid on each cartridge filter and remove lid.
4. Remove each of 4 to 8 media cages holding the media in place.
5. Spray down the cartridge filter to remove any accumulated pollutants.
6. Vacuum out old media and accumulated pollutants.
7. Reinstall media cages and fill with new media from manufacturer or outside
supplier. Manufacturer will provide specification of media and sources to purchase.
8. Replace the lid and tighten down bolts. Replace screening device, grate or
manhole cover when completed.
Drain Down Filter
1. Remove hatch or manhole cover over discharge chamber and enter chamber.
2. Unlock and lift drain down filter housing and remove old media block. Replace with
new media block. Lower drain down filter housing and lock into place.
3. Exit chamber and replace hatch or manhole cover.
www.modularwetlands.com
Maintenance Notes
1. Following maintenance and/or inspection, it is recommended the maintenance
operator prepare a maintenance/inspection record. The record should include any
maintenance activities performed, amount and description of debris collected, and
condition of the system and its various filter mechanisms.
2. The owner should keep maintenance/inspection record(s) for a minimum of five
years from the date of maintenance. These records should be made available to
the governing municipality for inspection upon request at any time.
3. Transport all debris, trash, organics and sediments to approved facility for disposal
in accordance with local and state requirements.
4. Entry into chambers may require confined space training based on state and local
regulations.
5. No fertilizer shall be used in the Biofiltration Chamber.
6. Irrigation should be provided as recommended by manufacturer and/or landscape
architect. Amount of irrigation required is dependent on plant species. Some plants
may require irrigation.
www.modularwetlands.com
Maintenance Procedure Illustration
Screening Device
The screening device is located directly
under the manhole or grate over the
Pre-Treatment Chamber. It’s mounted
directly underneath for easy access
and cleaning. Device can be cleaned by
hand or with a vacuum truck.
Separation Chamber
The separation chamber is located
directly beneath the screening device.
It can be quickly cleaned using a
vacuum truck or by hand. A pressure
washer is useful to assist in the
cleaning process.
www.modularwetlands.com
Cartridge Filters
The cartridge filters are located in the
Pre-Treatment chamber connected to
the wall adjacent to the biofiltration
chamber. The cartridges have
removable tops to access the
individual media filters. Once the
cartridge is open media can be
easily removed and replaced by hand
or a vacuum truck.
Drain Down Filter
The drain down filter is located in the
Discharge Chamber. The drain filter
unlocks from the wall mount and hinges
up. Remove filter block and replace with
new block.
www.modularwetlands.com
Trim Vegetation
Vegetation should be maintained in the
same manner as surrounding vegetation
and trimmed as needed. No fertilizer shall
be used on the plants. Irrigation
per the recommendation of the
manufacturer and or landscape
architect. Different types of vegetation
requires different amounts of
irrigation.
www.modularwetlands.com
Inspection Form
Modular Wetland System, Inc.
P. 760.433-7640
F. 760-433-3176
E.Info@modularwetlands.com
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
Yes
Depth:
Yes No
Modular Wetland System Type (Curb, Grate or UG Vault):Size (22', 14' or etc.):
Other Inspection Items:
Storm Event in Last 72-hours? No YesType of Inspection Routine Follow Up Complaint Storm
Office personnel to complete section to
the left.
2972 San Luis Rey Road, Oceanside, CA 92058 P (760) 433-7640 F (760) 433-3176
Inspection Report
Modular Wetlands System
Is the filter insert (if applicable) at capacity and/or is there an accumulation of debris/trash on the shelf system?
Does the cartridge filter media need replacement in pre-treatment chamber and/or discharge chamber?
Any signs of improper functioning in the discharge chamber? Note issues in comments section.
Chamber:
Is the inlet/outlet pipe or drain down pipe damaged or otherwise not functioning properly?
Structural Integrity:
Working Condition:
Is there evidence of illicit discharge or excessive oil,grease, or other automobile fluids entering and clogging the
unit?
Is there standing water in inappropriate areas after a dry period?
Damage to pre-treatment access cover (manhole cover/grate) or cannot be opened using normal lifting
pressure?
Damage to discharge chamber access cover (manhole cover/grate) or cannot be opened using normal lifting
pressure?
Does the MWS unit show signs of structural deterioration (cracks in the wall, damage to frame)?
Project Name
Project Address
Inspection Checklist
CommentsNo
Does the depth of sediment/trash/debris suggest a blockage of the inflow pipe, bypass or cartridge filter? If yes,
specify which one in the comments section. Note depth of accumulation in in pre-treatment chamber.
Is there a septic or foul odor coming from inside the system?
Is there an accumulation of sediment/trash/debris in the wetland media (if applicable)?
Is it evident that the plants are alive and healthy (if applicable)? Please note Plant Information below.
Sediment / Silt / Clay
Trash / Bags / Bottles
Green Waste / Leaves / Foliage
Waste:Plant Information
No Cleaning Needed
Recommended Maintenance
Additional Notes:
Damage to Plants
Plant Replacement
Plant Trimming
Schedule Maintenance as Planned
Needs Immediate Maintenance
www.modularwetlands.com
Maintenance Report
Modular Wetland System, Inc.
P. 760.433-7640
F. 760-433-3176
E.Info@modularwetlands.com
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 #
Comments:
2972 San Luis Rey Road, Oceanside, CA 92058 P. 760.433.7640 F. 760.433.3176
Inlet and Outlet
Pipe Condition
Drain Down Pipe
Condition
Discharge Chamber
Condition
Drain Down Media
Condition
Plant Condition
Media Filter
Condition
Long:
MWS
Sedimentation
Basin
Total Debris
Accumulation
Condition of Media
25/50/75/100
(will be changed
@ 75%)
Operational Per
Manufactures'
Specifications
(If not, why?)
Lat:MWS
Catch Basins
GPS Coordinates
of Insert
Manufacturer /
Description / Sizing
Trash
Accumulation
Foliage
Accumulation
Sediment
Accumulation
Type of Inspection Routine Follow Up Complaint Storm Storm Event in Last 72-hours? No Yes
Office personnel to complete section to
the left.
Project Address
Project Name
Cleaning and Maintenance Report
Modular Wetlands System
ATTACHMENT 4
City standard Single Sheet BMP (SSBMP) Exhibit
[Use the City’s standard Single Sheet BMP Plan.]