HomeMy WebLinkAboutCDP 05-46; MOSS RESIDENCE; PRIORITY DEVELOPMENT PROJECT (PDP) STORM WATER MANAGEMENT PLAN (SWQMP); 2018-03-05CITY OF CARLSBAD
PRIORITY DEVELOPMENT PROJECT (PDP)
STORM WATER QUALITY MANAGEMENT PLAN (SWQMP)
Moss Residence
5015 Tierra Del Oro
Carlsbad CA 92008
APN: 210-020-15
CDP0546 I DWG 508-IA I GR2017-0061
ENGINEER OF WORK:
Michael Kinnear, RCE 76785
[INSERT CIVIL ENGINEER'S NAME AND PE NUMBER HERE, PROVIDE WET SIGNATURE
AND STAMP ABOVE LINE]
c FESOV
C.
N Clo-4L#~' ~&ZQO 317K
PREPARED FOR:
Steve and Janet Moss
Moss Living Trust
25408 Colette Way
Calabasas, CA 91302
PREPARED BY: APR 09 2018
Coffey Engineering 9666 LAND DEV
Businesspark Avenue, Suite 210 San ENGELOPMENT Diego, CA 92131 (858)831-0111
michael@coffeyengineering.com
DATE:
3/05/2018
I
1
I
r~',
11,
I
I
TABLE OF CONTENTS
I Certification Page
Project Vicinity Map
I FORM E-34 Storm Water Standard Questionnaire
Site Information
FORM E-36 Standard Project Requirement Checklist
I
Summary of POP Structural BMPs
Attachment 1: Backup for PDP Pollutant Control BMPs
Attachment la: DMA Exhibit
Attachment ib: Tabular Summary of DMAs and Design Capture Volume Calculations
I Attachment Ic: Harvest and Use Feasibility Screening (when applicable)
Attachment Id: Categorization of Infiltration Feasibility Condition (when applicable)
Attachment le: Pollutant Control BMP Design Worksheets / Calculations
I Attachment 2: Backup for PDP Hydromodification Control Measures
Attachment 2a: Hydromodification Management Exhibit
Attachment 2b: Management of Critical Coarse Sediment Yield Areas
I
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
3/05/2018
[s :74 91 a 111_i9 Is]ki I -Jxei
Project Name: Moss Residence
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
Michael Kinnear
Print Name
Coffey Engineering, Inc
I
I
[1
r:i
I
Company
3/05/18
Date cWESSio,,
C7678
61 IVIV
FC
3/05/2018
PROJECT VICINITY MAP
3/05/2018
SITE
5
U c&O
VICINITY MAP
NO SCALE
THOMAS BROS. 1126, F2
I
(dy of
Carlsbad
STORM WATER STANDARDS
QUESTIONNAIRE
E-34
Development Services
Land Development Engineering
1635 Faraday Avenue
(760) 602-2750
www.carlsbadca.gov
INSTRUCTIONS:
To address post-development pollutants that may be generated from development projects, the city requires that new
development and significant redevelopment priority projects incorporate Permanent Storm Water Best Management
Practices (BMPs) into the project design per Carlsbad BMP Design Manual (BMP Manual). To view the BMP Manual,
refer to the Engineering Standards (Volume 5).
This questionnaire must be completed by the applicant in advance of submitting for a development application
(subdivision, discretionary permits and/or construction permits). The results of the questionnaire determine the level of
storm water standards that must be applied to a proposed development or redevelopment project. Depending on the
outcome, your project will either be subject to 'STANDARD PROJECT' requirements or be subject to 'PRIORITY
DEVELOPMENT PROJECT' (PDP) requirements.
Your responses to the questionnaire represent an initial assessment of the proposed project conditions and impacts. City
staff has responsibility for making the final assessment after submission of the development application. If staff
determines that the questionnaire was incorrectly filled out and is subject to more stringent storm water standards than
initially assessed by you, this will result in the return of the development application as incomplete. In this case, please
make the changes to the questionnaire and resubmit to the city.
If you are unsure about the meaning of a question or need help in determining how to respond to one or more of the
questions, please seek assistance from Land Development Engineering staff.
A completed and signed questionnaire must be submitted with each development project application. Only one
completed and signed questionnaire is required when multiple development applications for the same project are
submitted concurrently.
PROJECT INFORMATION
PROJECT NAME: MOSS RESIDENCE PROJECT ID: CDP05-46
ADDRESS: 5015 Tierra Del Oro Street APN: 210-020-15
The project is (check one): E New Development IZ Redevelopment
The total proposed disturbed area is: 4421 ft2 (_0.101_) acres
The total proposed newly created and/or replaced impervious area is: 3,813 ft (0.088 ) acres
If your project is covered by an approved SWQMP as part of a larger development project, provide the project ID and the
SWQMP # of the larger development project:
Project ID SWQMP #:
Then, go to Step 1 and follow the instructions. When completed, sign the form at the end and submit this with your
application to the city.
E-34 Page 1 of 4 REV 02116
I
M' L TO1 BE 9PMPJWFRJALJ. PQJECT r
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 LI i or structure that do not alter the size (See Section 1.3 of the BMP Design Manual for guidance)?
If you answered "yes" to the above question, provide justification below then go to Step 5, mark the third box stating "my
project is not a 'development project' and not subject to the requirements of the BMP manual' and complete applicant
information.
Justification/discussion: (e.g. the project includes only interior remodels within an existing building):
If you answered "no" to the above question, the project is a 'development project', go to Step 2.
TBE C9MPIETED FOR qVELOJV1ET PR1S
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:
Designed and constructed to direct storm water runoff to adjacent vegetated areas, or other non-
erodible permeable areas; El Z Designed and constructed to be hydraulically disconnected from paved streets or roads;
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 o 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? LI Lzi
If you answered "yes" to one or more of the above questions, provide discussion/justification below, then go to Step o, 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"totheabovequestions,yourprojectisnotexempt from PDP, goto Stop 3.
E-34 Page 2of4 REV 02/16
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, LI
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
g site of 10,000 square feet or impervious surface collectively over the entire project site on an existin El 0 more of impervious surface? This includes commercial, industrial, residential, mixed-use, and pub/ic
development projects on public or private land.
Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more
of impervious surface collectively over the entire project site and supports a restaurant? A restaurant is
a facility that sells prepared foods and drinks for consumption, including stationary lunch counters and LI
refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial
Classification (SIC) code 5812).
Is your project a new or redevelopment project that creates 5,000 square feet or.... more of impervious
surface collectively over the entire project site and supports a hillside development project? A hillside El IZI
development project includes development on any natural slope that is twenty-five percent or greater.
Is your project a new or redevelopment project that creates and/or replaces 50QQ...square feet or more
of impervious surface collectively over the entire project site and supports a parking lot? A parking lot is El 91 a land area or facility for the temporary parking or storage of motor vehicles used personally for
business or for commerce.
Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet r more.
of impervious surface collectively over the entire project site and supports a street road highway
freeway or driveway? A street road highway, freeway or driveway is any paved impervious surface
used for the transportation of automobiles, trucks, motorcycles, and other vehicles.
Is your project a new or redevelopment project that creates and.or, .eplaç. se ?,.0O 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 IZI LI
200 feet or less from the project to the ESA, or conveyed in a pipe or open channel any distance as an
isolated flow from the project to the ESA (i.e. not commingled with flows from adjacent lands). *
Is your project a new development or redevelopment project that createsand/or replaces 5,000 square
feet or more of impervious surface that supports an automotive repair shopJJf? An automotive repair El 0 shop is a facility that is categorized in any one of the following Standard Industrial Classification (SIC)
codes: 5013, 5014, 5541, 7532-7534, or 7536-7539.
Is your project a new development or redevelopment project .that creates .pdlpr replaces 5,000 square
feet or more of impervious area that supports ia retail gasoline outlet (RGO)9 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 El 0 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 El [ZJ
21,203.040)
If you answered "yes" to one or more of the above questions, your project is a PDP. If your project is a redevelopment
project, go to step 4. If your project is a new project, go to step 5, check the first box stating "My project is a POP
and complete applicant information,
If you answered "no" to all of the above questions, your project is a 'STANDARD PROJECT.' Go to step 5, check the
second box stating "My project is a 'STANDARD PROJECT'..." and complete applicant information.
E-34 Page 3 of 4 REV 02/16
tto BE COMPLETED FOR REDEVELOPMENT PROJECTS THAT ARE PRIORITY DEVELOPMENT PROJEC
qN LY
DP
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) = 3,538 sq. ft.
Total proposed newly created or replaced impervious area (B) = 3,813 sq. ft.
Percent impervious area created or replaced (B/A)*100 = 107.7
If you answered 'yes', the structural BMPs required for PDP apply only to the creation or replacement of impervious
surface and not the entire development. Go to step 5, check the first box stating 'My project is a PDP .....and complete
applicant information.
If you answered 'no," the structural BMP's required for PDP apply to the entire development. Go to step 5, check the
check the first box stating "My project is a POP and complete applicant information.
qp~ 75 T E ..
MATf " 00. LE E,APPJ Ti
My project is a POP and must comply with PDP stormwater requirements of the BMP Manual. I understand I must
prepare a Storm Water Quality Management Plan (SWQMP) for submittal at time of application.
LI My project is a 'STANDARD PROJECT' OR EXEMPT from PDP and must only comply with 'STANDARD PROJECT'
stormwater requirements of the BMP Manual. As part of these requirements, I will submit a "Standard Project
Requirement Checklist Form E-36" and incorporate low impact development strategies throughout my project.
Note: For projects that are close to meeting the PDP threshold, staff may require detailed impervious area calculations
and exhibits to verify if 'STANDARD PROJECT' stormwater requirements apply.
LI 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: Michael Rein Applicant Title: Engineering Designer
Applicant Signature:/*---'" ' Date: __________________________________
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.
Thk Rrw fr,r (itv / fr.p ()nIt,
City Concurrence:
YES NO p LI [I]
By:
Date:
Project ID:
E-34 Page 4 of 4 REV 02116
I
SITE INFORMATION CHECKLIST
Project Summary Information
Project Name Moss Residence
Project ID
Project Address 5015 Tierra Del Oro
Carlsbad CA 92008
APN: 210-020-15
Carlsbad 904.31
Assessor's Parcel Number(s) (APN(s))
Project Watershed (Hydrologic Unit)
Parcel Area 0.312 Acres ( 13,600 Square Feet)
Existing Impervious Area 0.081 Acres (_3,542
(subset of Parcel Area)
Square Feet)
Area to be disturbed by the project 0.101 Acres (_4,421
(Project Area) Square Feet)
Project Proposed Impervious Area 0.088 Acres (_3,813
(subset of Project Area)
Square Feet)
Project Proposed Pervious Area 0.014 608 (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.
3/05/2018
Description of Existing Site Condition and Drainage Patterns
Current Status of the Site (select all that apply):
f Existing development
LI Previously graded but not built out
LI Agricultural or other non-impervious use
Li Vacant, undeveloped/natural
Description I Additional Information:
Existing is a 2,560 sqft single-family residence, with brick walkway, rear yard wood
deck, and concrete driveway.
Existing Land Cover Includes (select all that apply):
'Vegetative Cover
Non-Vegetated Pervious Areas
'Impervious Areas
Description I Additional Information:
Existing residence surrounded by hardscape, vegetation, and pervious wood deck.
Underlying Soil belongs to Hydrologic Soil Group (select all that apply):
,Z'NRCS Type A
LI NRCS Type B
Li NRCS Type C
Li NRCS Type D
Approximate Depth to Groundwater (GW):
LJGW Depth <5 feet
Li5 feet <GW Depth< 10 feet
LI 10 feet < GW Depth <20 feet
,VGW Depth > 20 feet
Existing Natural Hydrologic Features (select all that apply):
Li Watercourses
LI Seeps
Li Springs
Li Wetlands
None
Description /Additional Information:
I
I
I 3/05/2018
I
I
I
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]:
Existing storm water conveyance is urban.
Roof runoff discharges via downspouts and rooftop sheet flow to the surrounding
hardscape and landscape areas.
Runoff from offsite is not conveyed through the site. Any storm water from the street
is collected by the rolled curb.
3/05/2018
Description of Proposed Site Development and Drainage Patterns
Project Description I Proposed Land Use and/or Activities:
Proposed is the demolition of the existing single family residence. The new construction
will also include a 2,575 sqft single family residence, hardscape walkways, and rear yard
deck/patio.
List/describe proposed impervious features of the project (e.g., buildings, roadways, parking
lots, courtyards, athletic courts, other impervious features):
The proposed impervious features of the site will include a 2,575 sqft single family
residence, and 1,238 sqft of impervious surfaces for a total of 3,813 sqft.
List/describe proposed pervious features of the project (e.g., landscape areas):
Disturbed surfaces that are intended to remain or be replaced by landscaping areas will total
approximately 583 sqft. These areas will be located around the perimeter of the site. There is a 118
sqft bioretention basin proposed on the southeasterly corner of the site for pollutant control.
Does the project include grading and changes to site topography?
El Yes
0 N
Description / Additional Information:
450 cu yd. of cut, proposed retaining wall along rear yard patio.
Does the project include changes to site drainage (e.g., installation of new storm water
conveyance systems)?
Yes
LINo
Description /Additional Information:
The majority of storm water runoff draining from rooftop downspouts will be collected by
landscape drains and directed to a proposed dual sump pump system, after which it will
be pumped to a proposed 118 sqft bioretention basin. Surface flows on the upper portion
of the site adjacent to the easterly property line will be collected by landscape drains and
pumped to the bioretention basin as well, where combined flows will discharge to Tierra
Del Oro Street through a D-25 curb outlet.
3/05/2018
Identify whether any of the following features, activities, and/or pollutant source areas will be
present (select all that apply):
U On-site storm drain inlets
U Interior floor drains and elevator shaft sump pumps
U Interior parking garages
U Need for future indoor & structural pest control
Landscape/Outdoor Pesticide Use
U Pools, spas, ponds, decorative fountains, and other water features
U Food service
U Refuse areas
U Industrial processes
U Outdoor storage of equipment or materials
Li Vehicle and Equipment Cleaning
U Vehicle/Equipment Repair and Maintenance
U Fuel Dispensing Areas
U Loading Docks
WFire Sprinkler Test Water
'Miscellaneous Drain or Wash Water
U Plazas, sidewalks, and parking lots
3/05/2018
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):
Runoff from the site enters the public storm drain system at a storm water inlet 250 feet southeast
of the site, where storm water discharges to the Pacific Ocean apprx. 200 feet west of the inlet.
There are no impaired water bodies downstream between the site and the Pacific Ocean.
List any 303(d) impaired water bodies within the path of storm water from the project site to the
Pacific Ocean (or bay, lagoon, lake or reservoir, as applicable), identify the
pollutant(s)/stressor(s) causing impairment, and identify any TMDLs for the impaired water
bodies: N/A.
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 13.6):
Pollutant
Not Applicable to
the Project Site
Anticipated from the
Project Site
Also a Receiving
Water Pollutant of
Concern
Sediment X
Nutrients X
Heavy Metals X
Organic Compounds X
Trash & Debris X
Oxygen Demanding
Substances
Oil & Grease X
Bacteria & Viruses X
Pesticides X
3/05/2018
Hydromodification Management Requirements
Do hydromodification management requirements apply (see Section 1.6 of the BMP Design
Manual)?
LI Yes, hydromodification management flow control structural BMPs required.
LI No, the project will discharge runoff directly to existing underground storm drains discharging
directly to water storage reservoirs, lakes, enclosed embayments, or the Pacific Ocean.
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.
LI No, the project will discharge runoff directly to an area identified as appropriate for an
exemption by the WMAA for the watershed in which the project resides.
Description I Additional Information (to be provided if a 'No' answer has been selected above):
Site flows will be discharged to the concrete-lined curb
and gutter, where it will enter a storm drain inlet and
discharge to the Pacific Ocean.
Critical Coarse Sediment Yield Areas*
*This Section only required if hydromodification management requirements apply
Based on the maps provided within the WMAA, do potential critical coarse sediment yield areas
exist within the project drainage boundaries?
LI Yes
'No, 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?
LI 6.2.1 Verification of Geomorphic Landscape Units (GLUs) Onsite
LI 6.2.2 Downstream Systems Sensitivity to Coarse Sediment
LI 6.2.3 Optional Additional Analysis of Potential Critical Coarse Sediment Yield Areas Onsite
LI No optional analyses performed, the project will avoid critical coarse sediment yield areas
identified based on WMAA maps
If optional analyses were performed, what is the final result?
LI No critical coarse sediment yield areas to be protected based on verification of GLUs onsite
LI Critical coarse sediment yield areas exist but additional analysis has determined that
protection is not required. Documentation attached in Attachment 8 of the SWQMP.
LI Critical coarse sediment yield areas exist and require protection. The project will implement
management measures described in Sections 6.2.4 and 6.2.5 as applicable, and the areas
are identified on the SWQMP Exhibit.
Discussion I Additional Information:
3/05/2018
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 P00, 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)?
LI No, the tow flow threshold is 0.1Q2 (default low flow threshold)
LI Yes, the result is the low flow threshold is 0.1 Q2
LI Yes, the result is the low flow threshold is 0.3Q2
LI Yes, the result is the low flow threshold is 0.5Q2
If a geomorphic assessment has been performed, provide title, date, and preparer:
Discussion /Additional Information: (optional)
Other Site Requirements and Constraints
When applicable, list other site requirements or constraints that will influence storm water
management design, such as zoning requirements including setbacks and open space, or City
codes governing minimum street width, sidewalk construction, allowable pavement types, and
drainage requirements.
The only constraint to the bioretention basin design is the difference in elevation from the
bioretention outlet pipe to the street. A raised biofiltration basin will be implemented in
order to allow for the required fall from the outlet to the street.
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.
I
[Insert City's Standard Project Requirement Checklist Form E-36 (here)]
Iu1 I J1 r. I] I aui. iii 71U :] Ji J:&1
STANDARD PROJECT Development Services (City of REQUIREMENT Land Development Engineering
Faraday Avenue 1635 F Carlsbad CHECKLIST
(760)602-2750 E36 www.carlsbadca.gov
Project Information
Project Name: Moss Residence
Project ID:
DWG No. or Building Permit No.:
Source Control BMPs
All development projects must implement source control BMPs SC-1 through SC-6 where applicable and feasible. See
Chapter 4 and Appendix E.1 of the BMP Design Manual for information to implement source control BMPs shown in this
checklist.
Answer each category below pursuant to the following.
"Yes" means the project will implement the source control BMP as described in Chapter 4 and/or Appendix E.1 of the
Model BMP Design Manual. Discussion/justification is not required.
"No" means the BMP is applicable to the project but it is not feasible to implement. Discussion/justification must be
provided. Please add attachments if more space is needed.
"N/A" means the BMP is not applicable at the project site because the project does not include the feature that is
addressed by the BMP (e.g., the project has no outdoor materials storage areas). Discussion/justification may be
provided.
Source Control Requirement Applied?
SC-I Prevention of Illicit Discharges into the MS4 0 Yes 0 No 0 N/A
Discussion/justification if SC-i not implemented:
SC-2 Storm Drain Stenciling or Signage 0 Yes 0 No 0 N/A
Discussion/justification if SC-2 not implemented:
Only small on-site landscape drains will be implemented.
SC-3 Protect Outdoor Materials Storage Areas from Rainfall Run-On Runoff, and Wind DYes 0No [I N/A Dispersal
Discussion/justification if SC-3 not implemented:
There will be no permanent outdoor material storage areas (project is a single family residence).
E-36 Page 1 of 4 Revised 03/16
Source Control Requirement (continued) I Applied?
SC-4 Protect Materials Stored in Outdoor Work Areas from Rainfall Run-On Runoff, and
Wind Dispersal 0 Yes 121 No El N/A
Discussion/justification if SC-4 not implemented:
There will be no permanent outdoor work areas where materials would be stored (project is a single family residence).
SC-5 Protect Trash Storage Areas from Rainfall, Run-On, Runoff, and Wind Dispersal 121 Yes El No 0 N/A
Discussion/justification if SC-5 not implemented:
Trash bins shall have lids that will be kept closed or are stored in garage.
SC-6 Additional BMPs based on Potential Sources of Runoff Pollutants must answer for each source listed below and
identify additional BMPs. (See Table in Appendix E.1 of BMP Manual for guidance).
A El On-site storm drain inlets 0 Yes El No 121 N/A
B El Interior floor drains and elevator shaft sump pumps 0 Yes 0 No 121 N/A
C 0 Interior parking garages 0 Yes 0 No 121 N/A
Dl Need for future indoor & structural pest control 121 Yes 0 No 0 N/A
D2 121 Landscape/Outdoor Pesticide Use 121 Yes 0 No El N/A
E El Pools, spas, ponds, decorative fountains, and other water features El Yes El No 121 N/A
F El Food service 0 Yes 0 No 0 N/A
G El Refuse areas 0 Yes El No 121 N/A
H El Industrial processes 0 Yes El No 121 N/A
I El Outdoor storage of equipment or materials El Yes El No 121 N/A
J El Vehicle and Equipment Cleaning El Yes El No 121 N/A
K El Vehicle/Equipment Repair and Maintenance El Yes El No 121 N/A
L El Fuel Dispensing Areas El Yes El No 171 N/A
M El Loading Docks El Yes El No 171 N/A
N 0 Fire Sprinkler Test Water 121 Yes El No El N/A
0 Miscellaneous Drain or Wash Water 121 Yes El No El N/A
P El Plazas, sidewalks, and parking lots El Yes El No 1 121 N/A
For "Yes" answers, identify the additional BMP per Appendix E.I. Provide justification for "No' answers.
Project is a single family residence.
E-36 Page 2 of 4 Revised 03/16
Site Design BMPs
All development projects must implement site design BMPs SD-1 through SD-8 where applicable and feasible. See
Chapter 4 and Appendix E.2 thru E.6 of the BMP Design Manual for information to implement site design BMPs shown in
this checklist.
Answer each category below pursuant to the following.
"Yes" means the project will implement the site design BMPs as described in Chapter 4 and/or Appendix E.2 thru E.6 of
the Model BMP Design Manual. Discussion /justification is not required.
"No" means the BMPs is applicable to the project but it is not feasible to implement. Discussion/justification must be
provided. Please add attachments if more space is needed.
"N/A" means the BMPs is not applicable at the project site because the project does not include the feature that is
addressed by the BMPs (e.g., the project site has no existing natural areas to conserve). Discussion/justification may be
provided.
Source Control Requirement Applied?
SD-11 Maintain Natural Drainage Pathways and Hydrologic Features 0 Yes I 0 No I 0 N/A
Discussion/justification if SD-1 not implemented:
Sump pump will be installed to divert storm water from bluff.
SD-2 Conserve Natural Areas, Soils, and Vegetation ---FO -Yes I 0 No I 0 N/A
Discussion/justification if SD-2 not implemented:
SD-3 Minimize Impervious Area I Zl Yes I D No I 0 N/A
Discussion/justification if SD-3 not implemented:
SD-4 Minimize Soil Compaction I z Yes 0 No I 0 N/A
Discussion/justification if SD-4 not implemented:
SD-5 Impervious Area Dispersion ZJ Yes 0 No 0 N/A
Discussion/justification if SD-5 not implemented:
E-36 Page 3 of 4 Revised 03/16
Source Control Requirement (continued) Applied?
SD-6 Runoff Collection L?'J Yes I D No 0 N/A
Discussion/justification if SD-6 not implemented:
SD-7 Landscaping with Native or Drought Tolerant Species I i Yes I 0 No 0 N/A
Discussion/justification if SD-7 not implemented:
SD-8 Harvesting and Using Precipitation 0 Yes 0 No 0 N/A
Discussion/justification if SD-8 not implemented:
Minimal amount of landscaping with native, drought tolerant species. Not sufficient demand for harvest & re-use.
E-36 Page 4 of 4 Revised 03/16
I
PDP Structural BMPs
All POPs must implement structural BMPs for storm water pollutant control (see Chapter 5 of
the BMP Design Manual). Selection of PDP structural BMPs for storm water pollutant control
must be based on the selection process described in Chapter 5. PDPs subject to
hydromodification management requirements must also implement structural BMPs for flow
control for hydromodification management (see Chapter 6 of the BMP Design Manual). Both
storm water pollutant control and flow control for hydromodification management can be
achieved within the same structural BMP(s).
PDP structural BMPs must be verified by the City at the completion of construction. This may
include requiring the project owner or project owner's representative to certify construction of
the structural BMPs (see Section 1.12 of the BMP Design Manual). PDP structural BMPs must
be maintained into perpetuity, and the City must confirm the maintenance (see Section 7 of the
BMP Design Manual).
Use this form to provide narrative description of the general strategy for structural BMP
implementation at the project site in the box below. Then complete the PDP structural BMP
summary information sheet for each structural BMP within the project (copy the BMP summary
information page as many times as needed to provide summary information for each individual
structural BMP).
Describe the general strategy for structural BMP implementation at the site. This information
must describe how the steps for selecting and designing storm water pollutant control BMPs
presented in Section 5.1 of the BMP Design Manual were followed, and the results (type of
BMPs selected). For projects requiring hydromodification flow control BMPs, indicate whether
pollutant control and flow control BMPs are integrated together or separate.
To address the primary and secondary pollutants of concern, structural BMP treatment
control options were evaluated for required pollutant removal efficiency. A bioretention
facility was selected which meets the required removal efficiency for all anticipated
pollutants from the project.
Runoff from the flat graded area which will contain the house and majority of the
landscaping & hardscape will be collected by area drains and will be directed to the dual
sump pump located at the rear yard patio. Runoff will be pumped to a raised bioretention
basin, will it will filter through an 18" engineered soil binder layer before infiltrating into
the native soils. If ponding occurs greater than the 12" allowed, storm water will
discharge from the bioretention area through an outlet in the overflow control catch
basin to a small landscaped area, where it flows to a D-25 curb outlet discharging from
the site (see plan sheet C.1 - Drainage & Grading Plan reproduced in Appendix A).
I
I
I
I
I
[Continued from previous page - This page is reserved for continuation of description of general
strategy for structural BMP implementation at the site.]
Structural BMP Summary Information
[Copy this page as needed to provide information for each individual proposed
structural BMP]
Structural BMP ID No. IMP A
DWG Sheet No. C.1
Type of structural BMP:
LI Retention by harvest and use (HU-1)
LI Retention by infiltration basin (IN F-1)
WRetention by bioretention (INF-2)
LI Retention by permeable pavement (INF-3)
LI Partial retention by biofiltration with partial retention (PR-1)
LI Biofiltration (BF-1)
LI Flow-thru treatment control included as pre-treatment/fore bay 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)
LI Detention pond or vault for hydromodification management
LI Other (describe in discussion section below)
Purpose:
Pollutant control only
LI Hydromodification control only
LI Combined pollutant control and hydromodification control
LI Pre-treatment/forebay for another structural BMP
LI Other (describe in discussion section below)
Discussion (as needed):
I
El
Iii
I
I
1
3/05/2018
ATTACHMENT I
BACKUP FOR POP POLLUTANT CONTROL BMPS
This is the cover sheet for Attachment 1.
Check which Items are Included behind this cover sheet:
Attachment Contents Checklist
Sequence
Attachment la DMA Exhibit (Required) lncIuded
See DMA Exhibit Checklist on the
back of this Attachment cover sheet.
(24"x36" Exhibit typically required)
Attachment lb Tabular Summary of DMAs Showing Included on DMA Exhibit in
DMA ID matching DMA Exhibit, DMA Attachment la
Area, and DMA Type (Required)* 0 Included as Attachment 1 b,
separate from DMA Exhibit *Provide table in this Attachment OR
on DMA Exhibit in Attachment 1
Attachment ic Form 1-7, Harvest and Use Feasibility Vincluded
Screening Checklist (Required unless fl Not included because the entire
the entire project will use infiltration project will use infiltration BMPs
BMPs)
Refer to Appendix B.3-1 of the BMP
Design Manual to complete Form 1-7.
Attachment ld Form 1-8, Categorization of Infiltration lncluded
Feasibility Condition (Required unless 0 Not included because the entire
the project will use harvest and use project will use harvest and use
BMPs) BMPs
Refer to Appendices C and D of the
BMP Design Manual to complete
Form 1-8.
Attachment le Pollutant Control BMP Design VIncluded
Worksheets I Calculations (Required)
Refer to Appendices B and E of the
BMP Design Manual for structural
pollutant control BMP design
guidelines
[1
I
I
I
Use this checklist to ensure the required information has been included on the DMA
Exhibit:
The DMA Exhibit must identify:
I VrUnderlying hydrologic soil group
Approximate depth to groundwater
I
'Existing natural hydrologic features (watercourses, seeps, springs, wetlands)
'Critical coarse sediment yield areas to be protected (if present)
f Existing topography and impervious areas
U
'Existing and proposed site drainage network and connections to drainage offsite
'Proposed grading
t Proposed impervious features
'Proposed design features and surface treatments used to minimize imperviousness
IVf 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)
I
LEGEND
/Z/1 , N16'51101 ~10.0
DESCRIPTION
PROPERTY LINE
EXISTING CONTOUR
PROPOSED CONTOUR
DIRECTION OF FLOW
PVC PIPE
DMA LIMIT
IMPERVIOUS AREAS
PERVIOUS AREAS
PACIFIC OCEAN
SYMBOL
go—
S 5, to9.66
JJ. S
SITE CHARA CTERIS TICS
A . HYDROLOGIC SOIL GROUP...........A
BASINXj . APPROXIMATE DEPTH TO GROUND
Li
WA TER ......... >24'
' ' • CRITICAL COARSE SEDIMENT
YIELD AREAS...........NONE PRESENT ON SITE
iS S'.S
/ ( / - S S
N665410E 227.69
c7A1
DMA Impervious Area Pervious Area Total (SF) Total (AC) C-Value Q(CFS) %lmp.
Pre
X (Sheet flow to Street) 1,712.00 546.00 2,258.00 0.052 0.71 0.25 75.82
Y (Sheet flow to Bluff) 1,830.00 4,663.00 6,493.00 0.149 0.33 0.33 28.18
Z (Ocean) 4,849.00 0.111
Total 3,542.00 5,209.00 13,600.00 0.312 0.58 SCALE: 1"-20'
DMA MAP A EXISTING CONDITIONS
MOSS RESIDENCE
KI COFFEY ENGINEERING, INC. 5015 TIERRA DEL ORO ST CARLSBAD CA 92008-4351
LEGEND
DESCRIPTION
PROPERTY LINE
EXISTING CONTOUR
PROPOSED CONTOUR
DIRECTION OF FLOW
PVC PIPE
DMA LIMIT
IMPERVIOUS AREAS
PERVIOUS AREAS
SYMBOL
BASIN PACIFIC OCEAN
ti
)J
I
iT
jJ Jj
.
J-
SITE CHARACTERISTICS
- • HYDROLOGIC SOIL GROUP...........A
APPROXIMATE DEPTH TO GROUND
WATER.........>24'
CRITICAL COARSE SEDIMENT
.. YIELD AREAS...........NONE PRESENT ON SITE
DMA Impervious Area Pervious Area Total (SF) Total (AC) C-Value Q (CFS) % Imp.
Post
A(Biofiltration) 3,607.00 608.00 4,215.00 0.097 0.78 0.52 85.58
B (Sheetflow to Bluff) 0.00 4,330.00 4,330.00 0.099 0.10 0.07 0.00
C(Ocean) 4,849.001 0.1111
D (Sheet Flow to Street) 206.001 0.001 206.001 0.0051 0.901 0.031 100.00
Total -
3,813.00
-
4,938.00 13,600.00 0.312 0.62 SCALE: 1"=20'
DMA MAP 'Bl PROPOSED CONDITIONS
MOSS RESIDENCE
HS: COFFEY ENGINEERING, INC. 5015 TIERRA DEL ORO ST CARLSBAD CA 92008-4351
Appendix I:
Forms and Checklists
Is there a demand for harvested water (check all that apply) at the project site that is reliably present during
the wet season?
66 Toilet and urinal flushing
j Landscape irrigation
Other:_________________
If there is a demand; estimate the anticipated average wet season demand over a period of 36 hours.
Guidance for planning level demand calculations for toilet/urinal flushing and landscape irrigation is provided
in Section B.3.2.
[Provide a summary of calculations here]
4 residents/residence x 9.3 gallons/resident/day / 7.48 gallons/cubic foot x 36 hours /
24h0ur5/day = 7.45 cubic feet/residence
I Residence x 7.45 cubic feet/residence = 7.45 cubic feet
Calculate the DCV using worksheet B-2.1.
DCV = 158.906 (cubic feet)
3a. Is the 36 hour demand greater than or
equal to the DCV?
11 Yes / lNo t
Harvest and use appears to be feasible.
Conduct more detailed evaluation and
siring calculations to confirm that DCV
can be used at an adequate rate to meet
drawdown criteria.
3b. Is the 36 hour demand greater than 3c. Is the 36 hour
0.25DCV but less than the full DCV? demand less than
Yes /16 No 0.25DCV?
fl ''Yes
Harvest and use may be feasible. Conduct Harvest and use is
more detailed evaluation and sizing considered to be
calculations to determine feasibility, infeasible.
Harvest and use may only be able to be
used for a portion of the site, or
(optionally) the storage may need to be
upsized to meet long term capture targets
while draining in loner than 36 hours.
Is harvest and use feasible based on further evaluation?
Li Yes, refer to Appendix E to select and size harvest and use BMPs.
No, select alternate BMPs.
BMP Design Manual-Appendices
December 2015 1-3
CITY OF CHULk VISTA
Moss 07-9342
Appendix I: Forms and Checklists
"C
91' $3 Now,
P 1- Full Infiltration Feasibility Screening Criteria
Would infiltration of the full design volume be feasible from a physical perspective without any undesirable
consequences that cannot be reasonably mitigated?
Criteris Screening Question Yea No
Is the estimated reliable Infiltration rate below proposed
facility locations greater than 0.5 Inches per hour? The response
1 to this Screening Question shall be based on a comprehensive X
evaluation of the factors presented in Appendix C.2 and Appendix
D.
Provide basis:
The infiltration test results below the proposed facility location were 3.522 and 3.428 inches per hour with a minimum factor of safety
of 2 applied. Simple open pit testing was performed at 2 locations on the site within or adjacent to the proposed Infiltration basin in
accordance with Appendix D of the City of Carlsbad liMP design manual. In addition, a comprehensive evaluation of the site was
conducted in accordance with Appendix C.2.
Please refer to our Report of Limited Geotechnical Investigation Proposed Storm Water Infiltration BMPs' for details of the
comprehensive evaluation and investigation conducted, simple open pit test rates and simple open pit rate to infiltration rate
calculations and maps representative of the study.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability.
Can infiltration greater than 0.3 Inches per hour be allowed
without increasing risk of geotechnical hazards (slope stability,
2 groundwater mounding, utilities, or other factors) that cannot x be mitigated to an acceptable level? The response to this
Screening Question shall be based on a comprehensive evaluation of
the factors presented in Appendix C.2.
Provide basin:
The infiltration test results below the proposed facility locations ranged from 3.522 to 3.428 inches per hour with a minimum factor of safety of 2 applied. In our opinion, any long term full infiltration at the site will not result in geotechnical hazards which cannot be reasonable mitigated to an acceptable level.
Please refer to our Report of Limited Geotechnical Investigation Proposed Storm Water Infiltration BMPs' for details of the
comprehensive evaluation and investigation conducted, simple open pit test rates and simple open pit rate to infiltration rate calculations and maps representative of the study.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability.
I
I
I 1-3 February 2016
Li
I
I
I
Li
I
I
Moss 079342
Appendix I: Forms and Checklists
Mal
Cnters Screening Question Yes No
Can infiltration greater than 0.5 inches per hour be allowed
without increasing risk of groundwater contamination (shallow
water table, storm water pollutants or other factors) that cannot x be mitigated to an acceptable level? The response to this
Screening Question shall be bated on a comprehensive evaluation of
the factors presented in Appendix C.3.
Provide basis:
The infiltration test results below the proposed facility locations ranged from 3.522 to 3.428 inches per hour With a minimum factor of safety of 2 applied. In our opinion, any long term full infiltration at the site will not result in a significant risk for groundwater related concerns.
Please refer to our 'Report of Limited Geotechsical Investigation Proposed Storm Water Infiltration SMPs' for details of the
comprehensive evaluation and investigation condseted, simple open pit test rates and simple open pit rate to infiltration rate
calculations and maps representative of the study.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability.
Can infiltration greater than 0.5 inches per hour be allowed
without causing potential water balance issues such as change
of seasonality of ephemeral streams or increased discharge of x contaminated groundwater to surface waters? The response to
this Screening Question shall be bated on a comprehensive
evaluation of the factors presented in Appendix C.3.
Provide basis:
Question In be answered by the design engineer.
Coffey Engineering: The site does not have
ephemeral streams or existing areas where
stormwater concentrates prior to leaving the
site.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability.
If all answers to rows I - 4 are "Yes" a full infiltration design is potentially feasible.
Part 1 The feasibility screening category is Full Infiltration Full
Result If any answer from row 1-4 is "No", infiltration may be possible to some extent but Inf
would not generally be feasible or desirable to achieve a "full infiltration" design.
Proceed to Part 2
i 0 DC completed using gathered site information and best professional judgment considering the definition of MEP in
the MS4 Permit. Additional testing and/on studies may be required by the City to substantiate findings.
1-4 February 2016
I
I
I
I
1
I
Li
I
LI
I
I
Moss 07-9342
Appendix I: Forms and Checklists
Part 2— Partial Infiltration vs. No Infiltration Feasibility Screening Criteria
Would infiltration of water in any appreciable amount be physically feasible without any negative
consequences that cannot be reasonably mitigated?
Criteria Screening Question Yes No
Do soil and geologic conditions allow for infiltration in any
appreciable rate or volume? The response to this Screening X Question shall be based on a comprehensive evaluation of the
factors presented in Appendix C.2 and Appendix D.
Provide basis:
The infiltration test results below the proposed facility location were 3.522 and 3.428 inches per hour with a minimum factor of safety
of 2 applied. Based on our infiltration rate findings and our geotechncial investigation conducted on the site, it is our opinion that the
geologic conditions allow for appreciable infiltration.
Please refer to our 'Report of Limited Geotechnical Investigation Proposed Storm Water Infiltration BMPs' for details of the
comprehensive evaluation and investigation conducted, simple open pit test rates and simple open pit rate to infiltration rate calculations and maps representative of the study.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability and why it was not feasible to mitigate low infiltration rates.
Can Infiltration in any appreciable quantity be allowed
without increasing risk of geotechnical hazards (slope
6 stability, groundwater mounding, utilities, or other factors) x that cannot be mitigated to an acceptable level? The response
to this Screening Question shall be based on a comprehensive
evaluation of the factors presented in Appendix C.2.
Provide basis:
In our opinion, any long terra partial infiltration at the site Will not result in geotechnical hazards which cannot be reasonable mitigated to an acceptable level.
Please refer to our 'Report of Limited Geotechnical Investigation Proposed Storm Water Infiltration BMPs" for details of the
comprehensive evaluation and investigation conducted, simple open pit test rates and simple open pit rate to Infiltration rate calculations and maps representative of the study.
Summariac findings of studies', provide reftrcnce to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability and why it was not feasible to mitigate low infiltration rates.
1-5 February 2016
I
Moss 07-9342
Appendix 1: Forms and Checklists
Criteria Screening Question Yes No
Can Infiltration in any appreciable quantity be allowed
without posing significant risk for groundwater related
concerns (shallow water table, storm water pollutants or other
factors)? The response to this Screening Question shall be based
on a comprehensive evaluation of the factors presented in
Appendix C,3.
Provide basis;
In our opinion, any long term partial Infiltration at the site will not result in a significant risk for groundwater related concerns.
Please refer to our 'Report of Limited Geolechnical Investigation Proposed Storm Water Infiltration BMPs' for details of the
comprehensive evaluation and investigation conducted, simple open pit test rates and simple open pit rate to infiltration rate calculations and maps representative of the study.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability and why it was not feasible to mitigate low infiltration rates.
Can infiltration be allowed without violating downstream
8 water rights? The response to this Screening Question shall be x based on a comprehensive evaluation of the factors presented in
Appendix C.3.
Provide basis:
Question to be answered by the design engineer.
Coffey Engineering: Site discharges nearby to public storm
drain, which outlets to Ocean. Water rights will not be
violated.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability and why it was not feasible to mitigate low infiltration rates.
If all answers from row 5-8 are yes then partial infiltration design is potentially feasible.
Part 2 The feasibility screening category is Partial Infiltration.
Result* If any answer from row 5-8 is no, then infiltration of any volume is considered to be
Infeasible within the drainage area. The feasibility screening category is No Infiltration.
1b be completed using gathered site information and best professional judgment considering the definition of MEP in
the MS4 Permit. Additional testing and/or studies may be required by the City to substantiate findings.
1-6 February 2016
- - - - - - - - - - - - - - - - - - - Appendix E: BMP Design Fact Sheets
1 2 3 4
Potential Sources of Permanent Controls—Show on Permanent Controls—List in Table Operational BMPs—Include in
Runoff Pollutants Drawings and Narrative Table and Narrative
A. Onsite storm drain 1 Locations of inlets. Mark all inlets with the words "No U Maintain and periodically repaint
inlets Dumping! Flows to Bay" or similar, or replace inlet markings.
See stencil template provided in U Provide storm water pollution
U Not Applicable Appendix 1-4 prevention information to new
site owners, lessees, or operators.
U See applicable operational BMPs
in Fact Sheet SC-44,"Drainage
System Maintenance," in the
CASQA Storm Water Quality
Handbooks at
wv.casga.org/resources /bmp-
handbooks /municipal-bmp-
handbook.
U Include the following in lease
agreements: "Tenant shall not
allow anyone to discharge
anything to storm drains or to
store or deposit materials so as to
create a potential discharge to
storm drains."
E-4 February 26, 2016
Appendix E: BMP Design Fact Sheets
Potential Sources of Permanent Controls—Show on Permanent Controls—List in Table Operational BMPs—Include in
Runoff Pollutants Drawings and Narrative Table and Narrative
U B. Interior floor U State that interior floor drains and U Inspect and maintain drains to
drains and elevator elevator shaft sump pumps will be prevent blockages and overflow.
shaft sump pumps plumbed to sanitary sewer.
Not Applicable
U C. Interior parking U State that parking garage floor U Inspect and maintain drains to
garages drains will be plumbed to the prevent blockages and overflow.
56 Not Applicable sanitary sewer.
U Dl. Need for future U Note building design features that U Provide Integrated Pest
indoor & structural discourage entry of pests. Management information to
pest control owners, lessees, and operators.
Not Applicable
E-5 February 26, 2016
- - - - - - - - - - - - - - - - - - - Appendix E: BMP Design Fact Sheets
-
2 3 4
Potential Sources of Permanent Controls—Show on Permanent Controls—List in Table and Operational BMPs—Include in
Runoff Pollutants Drawings Narrative Table and Narrative
(4' D2. Landscape/ 66 Show locations of existing State that final landscape plans will lid' Maintain landscaping using Outdoor Pesticide
Use trees or areas of shrubs and accomplish all of the following, minimum or no pesticides.
U Not Applicable
ground cover to be (( Preserve existing drought tolerant U See applicable operational undisturbed and retained. trees, shrubs, and ground cover to the BMPs in Fact Sheet SC-41,
U Show self-retaining landscape maximum extent possible. "Building and Grounds areas, if any. 1' Design landscaping to minimize Maintenance," in the CASQA
Show storm water treatment
facilities, irrigation and runoff, to promote Storm Water Quality
surface infiltration where appropriate, Handbooks at
and to minimize the use of fertilizers www.casga.org/resources/bmp
-handbooks /municipal-bmp- and pesticides that can contribute to
storm water pollution. handbook.
L' Where landscaped areas are used to Provide IPM information to
retain or detain storm water, specify new owners, lessees and
plants that are tolerant of periodic operators.
saturated soil conditions.
5( Consider using pest-resistant plants,
especially adjacent to hardscape.
To ensure successful establishment,
select plants appropriate to site soils,
slopes, climate, sun, wind, rain, land
use, air movement, ecological
consistency, and plant interactions.
E-6 February 26, 2016
Appendix E: BMP Design Fact Sheets
I It
- -
1 2 - 3 4
Potential Sources of Permanent Controls—Show on Permanent Controls—List in Table Operational BMPs—Include
Runoff Pollutants Drawings and Narrative in
Table and Narrative
U E. Pools, spas, U Show location of water feature U If the local municipality requires U See applicable operational
ponds, decorative and a sanitary sewer cleanout in pools to be plumbed to the sanitary BMPs in Fact Sheet SC-72,
fountains, and other an accessible area within 10 feet. sewer, place a note on the plans and "Fountain and Pool
water features. state in the narrative that this Maintenance," in the CASQA
(' Not Applicable connection will be made according to Storm Water Quality
local requirements. Handbooks at
N~,\-,,\i,.c,,isqa.org/resources/bm
p-handbooks/municipal-
bmp-handbook. ________________________
U F. Food service LI For restaurants, grocery stores, LI Describe the location and features of
(' Not Applicable and other food service the designated cleaning area.
operations, show location U Describe the items to be cleaned in (indoors or in a covered area this facility and how it has been sized outdoors) of a floor sink or other to ensure that the largest items can be area for cleaning floor mats, accommodated. containers, and equipment.
U On the drawing, show a note that
this drain will be connected to a
grease interceptor before
discharging to the sanitary sewer.
E-7 February 26, 2016
- - - - - - - - - - - - - - - - - - - Appendix E: BMP Design Fact Sheets
-
Potential Sources Permanent Controls—Show Permanent Controls—List Operational BMPs—Include in
of on Drawings in Table and Narrative Table and Narrative
U G. Refuse areas U Show where site refuse and U State how site refuse will U State how the following will be implemented:
' Not Applicable recycled materials will be be handled and provide Provide adequate number of receptacles. Inspect handled and stored • for supporting detail to what receptacles regularly; repair or replace leaky pickup. See local municipal is shown on plans. receptacles. Keep receptacles covered. requirements for sizes and State that signs will be Prohibit/prevent dumping of liquid or hazardous other details of refuse areas. posted on or near wastes. Post "no hazardous materials" signs. Inspect
U If dumpsters or other dumpsters with the and pick up litter daily and clean up spills
receptacles are outdoors, words CCDO not dump immediately. Keep spill control materials available
show how the designated hazardous materials on- site. See Fact Sheet SC-34, Waste Handling and
area will be covered, graded, here" or similar. Disposal" in the CASQA Storm Water Quality
and paved to prevent run- Handbooks at www.casqa.org/resources/bmp-
on and show locations of handbooks/municipal-bmp-handbook.
berms to prevent runoff
from the area. Also show
how the designated area will
be protected from wind
dispersal.
U Any drains from dumpsters,
compactors, and tallow bin
areas must be connected to
a grease removal device
before discharge to sanitary
sewer.
E-8 February 26, 2016
- - - - - - - - - - - - - - - - - - - Appendix E: BMP Design Fact Sheets
J to
1 2 3 4
Potential Sources of Permanent Controls—Show on Permanent Controls—List in Table and Operational BMPs—Include
Runoff Pollutants Drawings Narrative in Table and Narrative
Table and Narrative
U H. Industrial U Show process area. U If industrial processes are to be located U See Fact Sheet SC-10, "Non -
processes. onsite, state: "All process activities to be Storm Water Discharges" in
I' Not Applicable performed indoors. No processes to the CASQA Storm Water
drain to exterior or to storm drain Quality Handbooks at
system." https://www.casQa.org/resou
rces/bmp-handbooks.
U I. Outdoor storage U Show any outdoor storage U Include a detailed description of U See the Fact Sheets SC-31,
of equipment or areas, including how materials materials to be stored, storage areas, and "Outdoor Liquid Container
materials. (See rows J will be covered. Show how structural features to prevent pollutants Storage" and SC-33,
and K for source areas will be graded and from entering storm drains. "Outdoor Storage of Raw
control measures for bermed to prevent run-on or Where appropriate, reference Materials" in the CASQA
vehicle cleaning, runoff from area and documentation of compliance with the Storm Water Quality
repair, and protected from wind dispersal. requirements of local Hazardous Handbooks at
maintenance.) U Storage of non-hazardous Materials Programs for: www.casqa.org/resources/bm
Not Applicable liquids must be covered by a Hazardous Waste Generation
p-handbooks /municipal-bmp-
roof and/or drain to the handbook.
sanitary sewer system, and be Hazardous Materials Release
contained by berms, dikes, Response and Inventory
liners, or vaults. California Accidental Release
U Storage of hazardous materials Prevention Program
and wastes must be in U Aboveground Storage Tank
compliance with the local
hazardous materials ordinance Uniform Fire Code Article 80
and a Hazardous Materials Section 103(b) & (c) 1991
Management Plan for the site. E Underground Storage Tank
E-9 February 26, 2016
- - - - - - - - - - - - - - - - - - - Appendix E: BMP Design Fact Sheets
-
2 3 4
Potential Sources of Permanent Controls—Show on Drawings Permanent Controls—List in Operational BMPs—Include in
Runoff Pollutants Table and Narrative Table and Narrative
U J. Vehicle and U Show on drawings as appropriate: U If a car wash area is not Describe operational measures to -
Equipment Cleaning provided, describe measures implement the following (if
Gif Not Applicable
Commercial/industrial facilities having taken to discourage onsite applicable): vehicle /equipment cleaning needs must car washing and explain how either provide a covered, bermed area for these will be enforced. washing activities or discourage U Washwater from vehicle and
vehicle/ equipment washing by removing equipment washing operations
hose bibs and installing signs prohibiting such must not be discharged to the
uses. storm drain system.
Multi-dwelling complexes must have a U Car dealerships an d similar
paved, bermed, and covered car wash area may rinse cars wi th water
only. (unless car washing is prohibited onsite and
hoses are provided with an automatic shut- U See Fact Sheet SC-21,
off to discourage such use). "Vehicle and Equipment
Cleaning," in the CASQA
Washing areas for cars, vehicles, and Storm Water Quality
equipment must be paved, designed to Handbooks at prevent run-on to or runoff from the area, ww\v.casqa.org/resources/bm
and plumbed to drain to the sanitary sewer. 12-handbooks/municipal-bmp-
handbook. Commercial car wash facilities must be
designed such that no runoff from the facility
is discharged to the storm drain system.
Wastewater from the facility must discharge
to the sanitary sewer, or a wastewater
reclamation system must be installed.
E-10 February 26, 2016
- - - - - - - - - - - - - - - - - - - Appendix E: BMP Design Fact Sheets
- I - - - -
1 2 3 4
Potential Sources of Permanent Controls—Show on Permanent Controls—List in Operational BMPs—Include in
Runoff Pollutants Drawings Table and Narrative Table and Narrative
U K. U Accommodate all vehicle U State that no vehicle repair or In the report, note that all of the following
Vehicle/Equipment equipment repair and maintenance will be done restrictions apply to use the site:
Repair and maintenance indoors. Or outdoors, or else describe the U No person must dispose of, nor permit Maintenance designate an outdoor work area required features of the the disposal, directly or indirectly of
64 Not Applicable and design the area to protect outdoor work area. vehicle fluids, hazardous materials, or from rainfall, run-on runoff, and Ll State that there are no floor rinsewater from parts cleaning into wind dispersal. drains or if there are floor storm drains.
U Show secondary containment for drains, note the agency from U No vehicle fluid removal must be exterior work areas where motor which an industrial waste performed outside a building, nor on oil, brake fluid, gasoline, diesel discharge permit will be asphalt or ground surfaces, whether fuel, radiator fluid, acid- obtained and that the design inside or outside a building, except in containing batteries or other meets that agency's such a manner as to ensure that any hazardous materials or hazardous requirements. spilled fluid will be in an area of wastes are used or stored. Drains U State that there are no tanks, secondary containment. Leaking must not be installed within the containers or sinks to be used vehicle fluids must be contained or secondary containment areas. for parts cleaning or rinsing drained from the vehicle immediately.
U Add a note on the plans that or, if there are, note the No person must leave unattended drip states either (1) there are no floor agency from which an parts or other open containers drains, or (2) floor drains are industrial waste discharge containing vehicle fluid, unless such connected to wastewater permit will be obtained and containers are in use or in an area of pretreatment systems prior to that the design meets that secondary containment. discharge to the sanitary sewer agency's requirements.
and an industrial waste discharge
permit will be obtained.
E-11 February 26, 2016
- - - - - - - - - - - - - - - - - - - Appendix E: BMP Design Fact Sheets
H*
Potential Sources of Permanent Controls—Show on Permanent Controls—List Operational BMPs—Include in
Runoff Pollutants Drawings in Table and Narrative Table and Narrative
Li L. Fuel Dispensing Li Fueling areas 16 must have Li The property owner must dry sweep
Areas impermeable floors (i.e., portland the fueling area routinely.
GA Not Applicable cement concrete or equivalent smooth Li See the Business Guide Sheet, impervious surface) that are (1) graded "Automotive Service—Service at the minimum slope necessary to Stations" in the CASQA Storm prevent ponding; and (2) separated Water Quality Handbooks at from the rest of the site by a grade https://ww\v.casqa.org/resources/b break that prevents run-on of storm mp-handbooks. water to the MEP.
Li Fueling areas must be covered by a
canopy that extends a minimum of ten
feet in each direction from each
pump. [Alternative: The fueling area
must be covered and the cover's
minimum dimensions must be equal
to or greater than the area within the
grade break or fuel dispensing areal.]
The canopy [or cover] must not drain
onto the fueling area.
16 The fueling area must be defined as the area extending a minimum of 6.5 feet from the corner of each fuel dispenser or the length at which the hose and nozzle assembly may be
operated plus a minimum of one foot, whichever is greater.
E-12 February 26, 2016
Appendix E: BMP Design Fact Sheets
77,
Potential Sources of Permanent Controls—Show on Permanent Operational BMPs—Include in
Runoff Pollutants Drawings Controls—List in Table and Narrative
M. Loading Docks U Show a preliminary design for the U Move loaded and unloaded items indoors as
' Not Applicable loading dock area, including soon as possible.
roofing and drainage. Loading U See Fact Sheet SC-30 "Outdoor Loading and docks must be covered and/or Unloading," in the CASQA Storm Water graded to minimize run-on to and Quality Handbooks at runoff from the loading area. Roof ww\v.casqa.or/resources/bmp- downspouts must be positioned to handbooks /municipal-bmp-handbook. direct storm water away from the
loading area. Water from loading
dock areas should be drained to
the sanitary sewer where feasible.
Direct connections to storm
drains from depressed loading
docks are prohibited.
U Loading dock areas draining
directly to the sanitary sewer must
be equipped with a spill control
valve or equivalent device, which
must be kept closed during
periods of operation.
U Provide a roof overhang over the
loading area or install door skirts
(cowling) at each bay that enclose
the end of the trailer.
E-13 February 26, 2016
- - - - - - - - - - - - - - - - - - - Appendix E: BMP Design Fact Sheets
Upo 4 JiI
2 3 4
Potential Sources of Permanent Controls— Permanent Controls—List in Table and Operational BMPs—Include in
Runoff Pollutants Show on Drawings Narrative Table and Narrative
U N. Fire Sprinkler 56 Provide a means to drain fire sprinkler test water See the note in Fact Sheet SC-
Test Water to the sanitary sewer. 41, "Building and Grounds
U Not Applicable Maintenance," in the CASQA
Storm Water Quality
Handbooks at
www.casca.org/resources/bm
p-handbooks /mucipal-bmp-
handbook ________________________
0. Miscellaneous Drain U Boiler drain lines must be directly or indirectly
or Wash Water connected to the sanitary sewer system and may
U Boiler drain lines not discharge to the storm drain system.
U Condensate drain U Condensate drain lines may discharge to
lines landscaped areas if the flow is small enough that
U Rooftop runoff will not occur. Condensate drain lines
equipment may not discharge to the storm drain system.
U Drainage sumps LI Rooftop mounted equipment with potential to
produce pollutants must be roofed and/or have U Roofing, gutters, secondary containment. and trim
U Any drainage sumps onsite must feature a
U Not Applicable sediment sump to reduce the quantity of
sediment in pumped water.
U Avoid roofing, gutters, and trim made of copper
or other unprotected metals that may leach into
runoff.
E-14 February 26, 2016
- - - - - - - - - - - - - - - - - - - Appendix E: BMP Design Fact Sheets
Potential Sources of Permanent Controls—Show on Permanent Controls—List in Operational BMPs—Include in
Runoff Pollutants Drawings Table and Narrative Table and Narrative
' P. Plazas, Plazas, sidewalks, and parking lots must
sidewalks, and be swept regularly to prevent the
parking lots, accumulation of litter and debris.
U Not Applicable Debris from pressure washing must be
collected to prevent entry into the
storm drain system. Washwater
containing any cleaning agent or
degreaser must be collected and
discharged to the sanitary sewer and
not discharged to a storm drain.
E-15 February 26, 2016
Appendix B: Storm Water Pollutant Control Hydrologic Calculations and Sizing Methods
0
SITE
'85=0.58"
I r f\ \\\\
San Diego County
85 th Percentile Isopluvuals
: (
-
0
Legend
INCORPORATED CITY
NOTE: ---( - '0 - • \ ' -. -
The 8sth percentile tsa24 hour rainfall total.
It reaesetr,s a value such that 85% of the observed 24ho rainfall totals will less
than that value.
LA
'-
- - — va--
' "--
./
NOOC N j
( r 06 - IL
' 05' - - -' !1iEG
GIS - w
Figure B.1-1: 85th Percentile 24-hour Isopluvial Map
Storm Water Standards city of San Diego
Part 1: BMP Design Manual
January 2016 Edition B-7
TRANSPORTATION
& STORM WATER
Drainage Management Area
Surface Type Runoff Factor lArea (Ft2)
Concrete or Ashphalt 1 0.91 3607
Natural (A Soil) 0.11 608
Total 4215
Weighted Runoff Factor 0.78
1 85th Percentile 24-hr storm depth from Figure b.1-1 d = 0.580 inches
2 Area tributary to BMP (s) A = 0.10 acres
3 Area weighted runoff factor (estimate using Appendix B.1.1 and B.2.1 C = 0.78 unitless
4 Street trees volume reduction ICy = 0.000 cubic-feet
5 Rain barrels volume reduction RCV =
IDCV
0.000 cubic-feet
6 Calculated DCV = (3630 x X d x A) - TCV - RCV = 158.906 cubic-feet I
[1
I
I
I
I
I
I
I
I
I
I Appendix B: Stormwater Pollutant Control Hydrologic Calculations and Sizing Methods
I B.4.1 Simple Method
Stepwise Instructions:
Compute DCV using Worksheet B.4-1
Estimate design infiltration rate using Worksheet D.5-1
Design BMP(s) to ensure that the DCV is fully retained (i.e., no surface discharge during the
design event) and the stored effective depth draws down in no longer than 36 hours.
Worksheet B.4-1: Simple Sizing Method for Infiltration BMPs
Siriplc Si.nng MIt thod for Infiltration BMPs Work4icc 13.4--L
I DCV (Worksheet B-2.1) DCV 158.91 cubic-feet
2 Estimated design infiltration rate (Worksheet D.5-1) Kdesji= 1.74 in/hr
3 Available BMP surface area 81.81 sq-ft
4 Average effective depth in the BMP footprint (DCV/A) Dav 1.94 feet
5 Drawdown time, T (D *12/IKdesip,,) T= 13.38 hours
6 Provide alternative calculation of drawdown time, if needed.
I Notes:
Drawdown time must be less than 36 hours. This criterion was set to achieve average annual
I capture of 80% to account for back to back storms (See rationale in Section B.4.3). In order
to use a different drawdown time, BMPs should be sized using the percent capture method
(Section B.4.2).
I . The average effective depth calculation should account for any aggregate/media in the BMP.
For example, 4 feet of stone at a porosity of 0.4 would equate to 1.6 feet of effective depth.
This method may overestimate drawdown time for BMPs that drain through both the
I bottom and walls of the system. BMP specific calculations of drawdown time may be
provided that account for BMP-specific geometry.
I
I
B.-19 February 2016
I
I
Moss 07-9342 Appendi* I: Forms and Checklists
Factor Catcgory Factor Description Assigned Factor Product (p)
Weight (w) Value (v) p = w xv
Soil assessment methods 0.25 2 0.5
Predominant soil texture 0.25 2 0.5
A Suitability Site soil variability 0.25 2 0.5
Assessment - Depth to groundwater / impervious -
layer 0.25 t 0.25
Suitability Assessment Safety Factor, Si = 2p 1.75
Level of pretreatment! expected 05 2 1 sediment loads
B Design Redundancy/resiliency 0.25 3 0.75
Compaction during construction 0.25 2 0 .5
Design Safety Factor, S5 = Ep 2 .25
Combined Safety Factor, S,0, SA S5 4.0
Observed Infiltration Rare, inch/hr, Ka 6.95 (corrected for test-specific bias)
Design Infiltration Rate, in/hr, Kj = / Siov.J 1.74
Supporting Data
Briefly describe infiltration test and provide reference to test forma
Simple open pit testing was performed at 2 locations within or adjacent to the proposed facility per the requirements of the
City of Carlsbad Storm Water Standards, BMP Design Manual, in accordance with Appendix D.
Please refer to our 'Report of Limited Geolechnical Investigation Proposed Storm Water Infiltration BMPs' for details of the
comprehensive evaluation and investigation conducted, simple open pit test rates and simple open pit rate to infiltration rate
calculations and naps representative of the study.
I
I
[1
1-7 February 2016
ATTACHMENT 2
BACKUP FOR PDP HYDROMODIFICATION CONTROL MEASURES
[This is the cover sheet for Attachment 2.]
Indicate which Items are Included behind this cover sheet:
Attachment Contents Checklist
Sequence
Attachment 2a Hydromodification Management II Included
Exhibit (Required)
See Hydromodification Management
Exhibit Checklist on the back of this
Attachment cover sheet.
Attachment 2b Management of Critical Coarse 0 Exhibit showing project drainage
Sediment Yield Areas (WMAA Exhibit boundaries marked on WMAA
is required, additional analyses are Critical Coarse Sediment Yield
optional) Area Map (Required)
See Section 6.2 of the BMP Design Optional analyses for Critical Coarse
Manual. Sediment Yield Area Determination
6.2.1 Verification of Geomorphic
Landscape Units Onsite
LI 6.2.2 Downstream Systems
Sensitivity to Coarse Sediment
LI 6.2.3 Optional Additional Analysis
of Potential Critical Coarse
Sediment Yield Areas Onsite
Attachment 2c Geomorphic Assessment of Receiving LI Not performed
Channels (Optional) LI Included
See Section 6.3.4 of the BMP Design
Manual.
Attachment 2d Flow Control Facility Design and LI Included
Structural BMP Drawdown
Calculations (Required)
See Chapter 6 and Appendix G of the
BMP Design Manual
I
HYDROMODIFICAT!ON EXEMPT EXHIBIT - MOSS RESIDENCE
21-0- or.~ *
ht
Vr
oAj
54
ON
-.
-. -
\
am
Site runoff discharges to concrete-lined curb & gutter, where it enters the storm drain inlet south of the site. This drainage
line will discharge to the Pacific Ocean. See photos attached.
-
Use this checklist to ensure the required information has been included on the
1 Hydromodification Management Exhibit:
I
The Hydromodification Management Exhibit must identify:
fl Underlying hydrologic soil group
LI Approximate depth to groundwater
I D Existing natural hydrologic features (watercourses, seeps, springs, wetlands)
LI Critical coarse sediment yield areas to be protected (if present)
LI Existing topography
I Ll Existing and proposed site drainage network and connections to drainage offsite
LI Proposed grading
LI Proposed impervious features
I D Proposed design features and surface treatments used to minimize imperviousness
LI Point(s) of Compliance (POC) for Hydromodification Management
LI Existing and proposed drainage boundary and drainage area to each POC (when necessary,
create separate exhibits for pre-development and post-project conditions)
1 LI Structural BMPs for hydromodification management (identify location, type of BMP, and
size/detail)
[
I
I
[11
I
I
I
11
I
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:
LI 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:
VI 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)
LI How to access the structural BMP(s) to inspect and perform maintenance
LI 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)
LI Manufacturer and part number for proprietary parts of structural BMP(s) when
applicable
LI 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.)
LI Recommended equipment to perform maintenance
LI When applicable, necessary special training or certification requirements for
inspection and maintenance personnel such as confined space entry or
hazardous waste management
I
I
I
I
I
ATTACHMENT 3A
Maintenance Plan
Moss Residence
Treatment BMP Maintenance Plan for Vegetated BMPs
Typical Maintenance Indicator(s) for Vegetated BMPs Maintenance Activities
Accumulation of sediment, litter, or debris Remove and properly dispose of accumulated materials,
without damage to the vegetation.
Poor vegetation establishment
Re-seed, re-plant, or re-establish vegetation per original plans.
Mow or trim as appropriate, but not less than the design height
of 4".
Overgrown vegetation
Erosion due to concentrated irrigation flow Repair/re-seed/re-plant eroded areas and adjust the irrigation
system.
Repair/re-seed/re-plant eroded areas, and make appropriate
corrective measures such as adding erosion control blankets,
adding stone at flow entry points, or minor re-grading to Erosion due to concentrated storm water runoff flow restore proper drainage according to the original plan. If the
issue is not corrected by restoring the BMP to the original plan
and grade, the Engineer shall be contacted prior to any
additional repairs or reconstruction.
Make appropriate corrective measures such as adjusting
Standing water in bioretention area for longer than 96 irrigation system, removing obstructions of debris or invasive
hours following a storm event* vegetation, clearing underdrains, or repairing/replacing clogged
or compacted soils.
Obstructed inlet or outlet structure Clear obstructions.
Damage to structural components such as weirs, inlet Repair or replace as applicable. or outlet structures
*These BMPs typically include a surface ponding layer
as part of their function which may take 96 hours to
drain following a storm event.
U
Moss Residence
Treatment BMP Maintenance Plan
Maintenance Indicators and Actions for Detention BMPs
Typical Maintenance Indicator(s)
for Detention Basins Maintenance Activities
Poor vegetation establishment Re-seed, re-establish vegetation.
Erosion due to concentrated irrigation Repair/re-seed/re-plant eroded areas and adjust the irrigation
flow system.
Erosion due to concentrated storm Mow or trim as appropriate, but not less than the design height
water runoff flow of 4".
Repair/re-seed/re-plant eroded areas and make appropriate
Erosion due to concentrated irrigation flow corrective measures such as adding erosion control blankets adding stone at flow entry points, or re-grading where
necessary.
Accumulation of sediment, litter, or Remove and properly dispose of accumulated materials. debris
Make appropriate corrective measures such as adjusting
Standing water irrigation system, removing obstructions of debris or invasive
vegetation, or minor re-grading for proper drainage.
Obstructed inlet or outlet structure Clear obstructions.
Damage to structural components such as weirs, inlet Repair or replace as applicable. or outlet structures
I
I
I 2
r
U
I
I
I
I
Moss Residence
Treatment BMP Maintenance Plan
Maintenance of Bioretention BMPs
Access of Structural BMPs for Inspection and Maintenance
The Bioretention BMP consists of one (Ti) vegetated areas:
IMPA-118 ft2
A 1'xl' concrete inlet will be installed within the BMP with its rim elevated 12"
above the surface. The total depth of the inlet will be approximately 1.67'.
The inlet will be visible from the surface and can be accessed through the grate.
The depth will not require a ladder to access the full extent of the inlet.
The bioretention basin is accessible from the front yard of the private residence.
Maintenance Thresholds
Any grasses within the bioretention areas shall be cut when in excess of 4" tall.
Debris & sediment shall be cleared from the basin when 2" have accumulated.
Any amount sediment or debris accumulation observed within the overflow inlet
shall be removed when seen.
During routine landscape maintenance activities, if bare areas or erosion are
observed they shall be re-seeded.
If standing water is observed for longer than 24-hours the soil media shall be
inspected for clogging and cleaned.
Bioretention Soil Media Replacement
Soil media within the bioretention area shall be replaced when the filtration rate
drops below 5"/hour if regular maintenance cannot restore this rate.
Recommended Maintenance Equipment
Equipment needed for maintenance will typically include those needed for routine
landscape maintenance:
Hand Shovels
Wheel barrows
Lawn mower
Hedge clippers
Other
Special Training
Maintenance and inspection activities required are typical for routine landscape
maintenance. No special training required.
I 3
I
I
I
I
El
I
I
I
I
I
I
ATTACHMENT 4
City standard Single Sheet BMP (SSBMP) Exhibit
[Use the City's standard Single Sheet BMP Plan.]
I
I
Use this checklist to ensure the required information has been included on the plans:
The plans must identify:
WT Structural BMP(s) with ID numbers matching Form 1-6 Summary of PDP Structural BMPs
SK The grading and drainage design shown on the plans must be consistent with the delineation of
DMAs shown on the DMA exhibit
66 Details and specifications for construction of structural BMP(s)
RK Signage indicating the location and boundary of structural BMP(s) as required by the [City Engineer]
WT 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)
li(Manufacturer and part number for proprietary parts of structural BMP(s) when applicable
Maintenance thresholds specific to the structural BMP(s), with a location-specific frame of reference
(e.g., level of accumulated materials that triggers removal of the materials, to be identified
based on viewing marks on silt posts or measured with a survey rod with respect to a fixed
benchmark within the BM P)
R' 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
fl Include landscaping plan sheets showing vegetation requirements for vegetated structural BMP(s)
'All BMPs must be fully dimensioned on the plans
li(When proprietary BMPs are used, site-specific cross section with outflow, inflow, and model number
shall be provided. Photocopies of general brochures are not acceptable.
I
[1
El Page Insert Page # of Insert Total # of Pages
PDP SWOMP Date: Click here to enter a date.
PDP SWQMP Template Date: January 2016