HomeMy WebLinkAboutCDP 05-46; MOSS RESIDENCE; STORM WATER QUALITY MANAGEMENT PLAN; 2018-02-12CITY 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
CDP05-46 / DWG 508-1 A I GR2017-0061
ENGIN EER OF WORK:
Michael Kinnear, RCE 76785
[IN SERT CIVIL ENGINEER'S NAME AND PE NUMBER HERE, PROVIDE WET SIGNATURE
AND STAMP ABOVE LINE]
PREPARED FOR:
Steve and Janet Moss
Moss Livi ng Trust
25408 Colette Way
Calabasas, CA 91302
PREPARED BY:
Coffey Engineering 9666
Businesspark Avenue, Suite 210 San
Diego, CA 92131 (858) 831-01 11
michael@cofFeyengineering.com
DATE:
2/12/2018
___ ___,
RECORD COPY
Initial Date
ECEIV 1 D
FEB 1-3 lUlB
LAND DEVELOf--JMENT
ENGINEERING
' '··. ·-
CV,
• 0 :z:
~
(.)
w :c
(..)
:z
<(
___J
a..
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 1 a: OMA Exhibit
Attachment 1 b: Tabular Summary of DMAs and Design Capture Volume Calculations
Attachment 1 c: Harvest and Use Feasibility Screening (when applicable)
Attachment 1 d: Categorization of Infiltration Feasibility Condition (when applicable)
Attachment 1 e: 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
12/18/2017
Project Name: Moss Residence
Project ID:
CERTIFICATION PAGE
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 proj ect 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
Company
2/12/18
Date
2/12/2018
\
PROJECT VICINITY MAP
12/18/2017
____, SITE
VICINITY MAP
NO SCALE
THOMAS BROS. 1126, F2
N
I
Ccityof
Carlsbad
STORM WATER STANDARDS
QUESTIONNAIRE
Development Services
Land Development Engineering
1635 Faraday Avenue
(760) 602-2750
www.carlsbadca.gov
E-34
I 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 th e BMP Manual,
refer to the Engineering Standards (Volume 5).
This questionnaire must be completed by the applicant in advance of subm itting 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: CDP05-4 6
ADDRESS: 5015 Tierra Del Oro Street APN:210-020-15
The project is (check one): D New Development Ill Redevelopment
The total proposed disturbed area is: 4421 ft2 ( 0.101 ) acres
The total proposed newly created and/or replaced impervious area is: 3,81 3 ft2 ( 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 yo ur
application to the city.
E-34 Page 1 of 4 REV 02/16
To determine if your project is a "development project", please answer the following question:
YES NO
Is your project LIMITED TO routine maintenance activity and/or repair/improvements to an existing building
or structure that do not alter the size (See Section 1.3 of the BMP Design Manual for guidance)? □ [ll
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):
To determine if your project is exempt from PDP requirements pursuant to MS4 Permit Provision E.3.b.(3), please answer
the following questions:
Is your project LIMITED to one or more of the following:
YES NO
1. Constructing new or retrofitting paved sidewalks, bicycle lanes or trails that meet the following criteria:
a) Designed and constructed to direct storm water runoff to adjacent vegetated areas, or other non-
erodible permeable areas; D
b) Designed and constructed to be hydraulically disconnected from paved streets or roads;
c) Designed and constructed with permeable pavements or surfaces in accordance with USEPA
Green Streets uidance?
2. Retrofitting or redeveloping existing paved alleys, streets, or roads that are designed and constructed in D
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? D
If you answered "yes" to one or more of the above questions, provide discussion/justification below, then go to Step 5, mark
the second box stating "my project is EXEMPT from PDP ... " and complete applicant information.
Discussion to justify exemption ( e.g. the project redeveloping existing road designed and constructed in accordance with
the USEPA Green Street guidance):
If ou answered "no" to the above uestions, our ro·ect is not exem
E-34 Page 2 of 4 REV 02/16
To determine if your project is a PDP, please answer the following questions (MS4 Permit Provision E.3.b.(1)):
1. Is your project a reWAliy~Jppr.iJ~N)h~l::.ff~~te~Jo;opp?$qua'r'~J§~LPnm_qre/ptjrnpe._ryipµ§(§L\ifaefes)
collectively over the entire project site? This includes commercial, industrial, residential, mixed-use,
and ublic develo ment ro ·ects on ub/ic or rivate land.
2
· ,:_~~~~q~~~~z~~~e,f~~~~c1:~~-~~~~~mi~~~;f1~~1:~J~~!&1!t~8~:Q:~~~l;'.bJt~,f~~:;1~1aJ~\~◊-~~-~~i~~:tf~~)
idji;@)gfjifip~fyi9@/~Y.TTa§&?) This includes commerdal, industrial, residential, mixed-use, and public
develo ment pro ·ects on ublic or rivate land.
3. Is rour p~oject a new or red~velopment proje?t that _creat~s andl,?~ . .[~pl~~~f. 2.!(),99,~9~are feet or mo~e
of 1mperv1ous surface collectively over the entire project site and §Y.PP9f:l.~}.i;l}~ft§4f9..QJ? A restaurant 1s
a facility that sells prepared foods and drinks for consumption, including stationary lunch counters and
refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial
Classification SIC code 5812 .
4. Is your project a new or redevelopment project that createsfi,000 squareJ~etc>r .m.preof impervious
surface collectively over the entire project site and supports '~)ii/)§iqg/i:1~11~Jiipiii,@fpf,6j~_ct,? A hillside
develo ment ro·ect includes develo ment on an natural slo e that is !went -five ercent or reater.
5. Is your project a new or redevelopment project that creates and/Off~Pl,~W(j!.~ ~,9Q.9,.~gtJare feet or more
of impervious surface collectively over the entire project site and s@i:>?>.rt~'-~ip~rk)ijgJi?l7 A parking lot is
a land area or facility for the temporary parking or storage of motor vehicles used personally for
business or for commerce.
6. Is your project a new or redevelopment project that creates and/or replaces 5,000 s'.guare feet9r more
of l!JlP~Q'.!9!-!§, ,~Nrf~,c:~ collectively over _the entire project sit~ and s_upports\jiii,\~Jf~~t;)fo~dt;;hi~~fdiy}
JrE:JE:JWqYiJ>J9fllJE:l),'{.i=IY?J A street, road, highway, freeway or dnveway Is any paved Imperv10us surface
used for the trans ortation of automobiles, trucks, motorc cles and other vehicles.
7. Is your project a new or redevelopment project that creates ~n9/9!S~RJp.C:§~ ?,§QQ.~.g~,~rE:J f~~t9L!)}9rn
<>f.i[ripeiry(CllJ.~-~Urf?c:,~ collectively over the entire site, and tjisqti_arge§_):l@¢tlyA9/~tUE[ivir§ni'ijl'l'nt.ally}
§illsHiVif)A.'c~~·x1;:;;A)7i "Discharging Directly to" includes flow that is conveyed overland a distance of
200 feet or less from the project to the ESA, or conveyed in a pipe or open channel any distance as an
isolated flow from the ro·ect to the ESA i.e. not commin led with flows from ad·acent lands.*
8. Is your project a new development or redevelopment Pf.9i~9.tJb?J c:r,~,§1Je,§.l:!f\9/.9r replaces 5,000 square
feet or more of impervious surface that supports an ;~1,1tQri:)9ti'1$i't@:Pf:iif.}$.h\:iri,;? An automotive repair
shop is a facility that is categorized in any one of the following Standard Industrial Classification (SIC)
codes: 5013 5014, 5541, 7532-7534, or 7536-7539.
9. Is your project a new development or redevelopmeo! p(9je~tth?l c:r;~,§lt.~§ ?}J9/<?r replaces 5,000 square
feet or more of impervious area that supports '~i§tail .g~s'91ib$~9@~.L(RGQ)?) 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 er da .
10. Is your project a new or redevelopment project that results in thedi~Jqrpa!1¢~of 'qn'¢)9(ffiW~~cre~·otl~tiqJ
and are expected to generate pollutants post construction?
11. Is your project)Qqat~g,W)H:iifl\~OQJ~iat)::iHh~i fijc;ifi6Qt9-an',and (1) creates 2,500 square feet or more of
impervious surface or (2) increases impervious surface on the property by more than 10%? (CMC
21.203,040
YES NO
□ 121
□ 121
□ 121
□
□ 121
□ lZI
lZI □
□ lZI
□ 121
□ lZI
□ lZI
If you answered "yes" to one or more of the above questions, your project is a PDP. If your project is a redevelopment
project, go to step 4. If your project is a new project, go to step 5, check the first box stating "My project is a PDP ... "
and complete applicant information.
If you answered "no" to all of the above questions, your project is a 'STANDARD PROJECT.' Go to step 5, check the
second box statin "M ro·ect is a 'STANDARD PROJECT' ... " and com lete a licant information.
E-34 Page 3 of 4 REV 02/16
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_,5_3_8 _________ sq. ft.
Total proposed newly created or replaced impervious area (8) = _3_•8_1_3 _________ sq. ft.
Percent impervious area created or replaced (B/A)*100 = 107·7 %
YES NO
Ill □
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.
lZI My project is a PDP and must comply with PDP stormwater requirements of the BMP Manual. I understand I must
prepare a Storm Water Quality Management Plan (SWQMP) for submittal at time of application.
0 My project is a 'STANDARD PROJECT' OR EXEMPT from PDP and must only comply with 'STANDARD PROJECT'
stormwater requirements of the BMP Manual. As part of these requirements, I will submit a "Standard Project
Requirement Checklist Form E-36" and incorporate low impact development strategies throughout my project.
Note: For projects that are close to meeting the PDP threshold, staff may require detailed impervious area calculations
and exhibits to verify if 'STANDARD PROJECT' stormwater requirements apply.
D My Project is NOT a 'development project' and is not subject to the requirements of the BMP Manual.
Applicant Information and Signature Box
Applicant Name: _M_i_c_ha_e_l_R_e_in ___________ _ Applicant Title: Engineering Designer
Applicant Signature: ,zJ ~,f" ~ Date: _ _..£_,._1/!_~....,.../.__l . ...,_"7---______ _
• 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.
r, c· u This Box or 1/y se Only
YES NO
City Concurrence: □ □
By:
Date:
Project ID:
E-34 Page 4 of 4 REV 02/16
SITE INFORMATION CHECKLIST
Project Summary Information
Project Name Moss Residence
Project ID
Project Address 5015 Tierra Del Oro
Carlsbad CA 92008
Assessor's Parcel Number(s) (APN(s)) APN: 210-020-15
Project Watershed (Hydrologic Unit) Carlsbad 904 .31
Parcel Area 0.312 13,600 Acres ( Square Feet)
Existing Impervious Area 0.081 Acres ( 3,542 Square Feet) (subset of Parcel Area)
Area to be disturbed by th e project 0.101 Acres ( 4,421 Square Feet) (Project Area)
Project Proposed Impervious Area 0.088 Acres ( 3,813 Square Feet) (subset of Project Area)
Project Proposed Pervious Area 0.014 Acres ( 608 Square Feet) (subset of Project Area)
Note: Proposed Impervious Area+ Proposed Pervious Area= Area to be Disturbed by the
Project. ' This may be less than the Pa rcel Area.
12/18/2017
Description of Existing Site Condition and Drainaae 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 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):
0"Vegetative Cover
~Non-Vegetated Pervious Areas
~Impervious Areas
Description/ Additional Information:
Existing residence surrounded by hardscape, vegetation, and pervious wood deck.
Underlying Soil belongs to Hydrologic Soi l Group (select all that apply):
¢NRCS Type A
D NRCS Type B
D NRCS Type C
D NRCS Type D
Approximate Depth to Groundwater (GW):
D 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):
D Watercourses
D Seeps
□ Springs
□Wetlands
~None
Description/ Additional Information:
12/18/2017
Description of Existing Site Topography and Drainage [How is storm water runoff conveyed from
the site? At a minimum, this description should answer (1) whether existing drainage
conveyance is natural or urban; (2) describe existing constructed storm water conveyance
systems, if applicable; and (3) is runoff from offsite conveyed through the site? if so, describe]:
1. Existing storm water conveyance is urban.
2. Roof runoff discharges via downspouts and rooftop sheet flow to the surrounding
hardscape and landscape areas.
3. Runoff from offsite is not conveyed through the site. Any storm water from the street
is co llected by the rolled curb.
12/18/2017
Description of Proposed Site Development and Drainaae Patterns
Project Description / 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 rea r 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?
0Yes
□No
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
□No
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 wi ll
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.
12/18/2017
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
□ Ref use 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
12/18/2017
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 in let.
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 Poll utant(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 Desiqn Manual Appendix B.6):
Also a Receiving
Not Applicable to Anticipated from the Water Pollutant of
Pollutant the Project Site Project Site Concern
Sediment X
Nutrients X
Heavv Metals X
Oraanic Comoounds X
Trash & Debris X
Oxygen Demanding X Substances
Oil & Grease X
Bacteria & Viruses X
Pesticides X
12/18/2017
Hvdromodification Management Requirements
Do hydromodification management requirements apply (see Section 1.6 of the BMP Design
Manual)?
o Yes, hydromodification management flow control structural BMPs required.
D No, the project will discharge runoff directly to existing underground storm drains discharg ing
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.
o 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):
Site flows will be discharged to the concrete-lined curb
and gutter, where it will enter a storm drain inlet and
discharge to the Pacifi c Ocean.
Critical Coarse Sediment Yield Areas*
*This Section onlv reauired if hydromodification management reauirements aooly
Based on the maps provided within the W MAA, 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?
o 6.2.1 Verification of Geomorphic Landscape Units (GLUs) Onsite
o 6.2.2 Downstream Systems Sensitivity to Coarse Sediment
o 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 critica l coarse sediment yield areas to be protected based on verification of GLUs onsite
□ Critical coarse sediment yield areas exist but additional analysis has determin ed 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:
12/18/2017
Flow Control for Post-Project Runoff"'
*This Section only required if hydromodification management reauirements annly_
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.
N/A
Has a geomorphic assessment been performed for the receiving channel(s)?
D No, the low flow threshold is 0.102 (default low flow threshold)
D Yes, the result is the low flow threshold is O. 102
D Yes, the result is the low flow threshold is 0.302
D Yes, the result is the low flow threshold is 0.502
If a geomorph ic assessment has been performed, provide title, date, and preparer:
Discussion / Add itional 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.
[Insert City's Standard Project Requirement Checklist Form E-36 (here)]
SUMMARYOFPDPSTRUCTURALBMPS
C City of
Carlsbad
Project Name: Moss Residence
Project ID:
DWG No. or Building Permit No.:
STANDARD PROJECT
REQUIREMENT
CHECKLIST
E-36
Project Information
Source Control BMPs
Development Services
Land Development Engineering
1635 Faraday Avenue
(760) 602-2750
www.carlsbadca.gov
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 .
• "NIA" means the BMP is not applicable at the project site because the project does not include the feature that is
addressed by the BMP (e.g., the project has no outdoor materials storage areas). Discussion/justification may be
provided .
Source Control Requirement Applied?
SC-1 Prevention of Illicit Discharges into the MS4 Ill Yes □ No □ NIA
Discussion/justification if SC-1 not implemented:
SC-2 Storm Drain Stenciling or Signage □ Yes Ill No □ NIA
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 □ Yes Ill No □ NIA 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 Reauirement (continued) Annlied?
SC-4 Protect Materials Stored in Outdoor Work Areas from Rainfall, Run-On, Runoff, and D Yes Ill No D N/A
Wind Dispersal
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 Ill Yes D No D 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 quidance).
A □ On-site storm drain inlets D Yes D No 0 N/A
B □ Interior floor drains and elevator shaft sump pumps D Yes D No 0 NIA
C □ Interior parking garages D Yes D No 0 N/A
D1 0 Need for future indoor & structural pest control 0 Yes D No D NIA
D2 0 Landscape/Outdoor Pesticide Use 121 Yes D No D N/A
E □ Pools, spas, ponds, decorative fountains, and other water features D Yes D No 0 N/A
F D Food service D Yes D No 0 N/A
G □ Refuse areas D Yes D No Ill N/A
H D Industrial processes D Yes D No 0 N/A
I □ Outdoor storage of equipment or materials D Yes D No Ill N/A
J □ Vehicle and Equipment Cleaning D Yes D No 0 N/A
K □ Vehicle/Equipment Repair and Maintenance D Yes D No 0 N/A
L □ Fuel Dispensing Areas D Yes D No 0 N/A
M □ Loading Docks D Yes D No 0 N/A
N 0 Fire Sprinkler Test Water Ill Yes D No D N/A
0 0 Miscellaneous Drain or Wash Water laZI Yes D No D N/A
p D Plazas, sidewalks, and oarkino lots D Yes □No Ill N/A
For "Yes" answers, identify the additional BMP per Appendix E.1. 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.
• "NIA" 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 I Applied?
SD-1 Maintain Natural Drainaae Pathwavs and HydroloQic Features I □ Yes I '21 No ID NIA
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 1 '2J Yes I □ No I □ N/A
Discussion/justification if SD-2 not implemented:
SD-3 Minimize Impervious Area I l2l Yes I □ No I □ N/A
Discussion/justification if SD-3 not implemented:
SD-4 Minimize Soil Compaction I '21 Yes I □No I □ NIA
Discussion/justification if SD-4 not implemented:
SD-5 Impervious Area Dispersion I '2J Yes 1 □ No I □ N/A
Discussion/justification if SD-5 not implemented:
E-36 Page 3 of 4 Revised 03/16
Source Control Reauirement (continued) I APPiied?
SD-6 Runoff Collection I Ill Yes I □ No I □ N/A
Discussion/justification if SD-6 not implemented:
SD-7 Landscapinq with Native or Drought Tolerant Species I Ill Yes l □ No I □ N/A
Discussion/justification if SD-7 not implemented:
SD-8 Harvestina and Usinq Precipitation I □ Yes I (l] No I □ NIA
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
PDP Structural BMPs
All PDPs must implement structural BMPs for storm water pollutant control (see Chapter 5 of
the BMP Design Manual). Selection of PDP structural BMPs for storm water pollutant control
must be based on the selection process described in Chapter 5. PDPs subject to
hydromodification management requirements must also implement structural BMPs for flow
control for hydromodification management (see Chapter 6 of the BMP Design Manual). Both
storm water pollutant control and flow control for hydromodification management can be
achieved within the same structural BMP(s).
PDP structural BMPs must be verified by the City at the completion of construction. This may
include requiring the project owner or project owner's representative to certify construction of
the structural BMPs (see Section 1.12 of the BMP Design Manual). PDP structural BMPs must
be maintained into perpetuity, and the City must confirm the maintenance (see Section 7 of the
BMP Design Manual).
Use this form to provide narrative description of the general strategy for structural BMP
implementation at the project site in the box below. Then complete the PDP structural BMP
summary information sheet for each structural BMP within the project (copy the BMP summary
information page as many times as needed to provide summary information for each individual
structural BMP).
Describe the general strategy for structural BMP implementation at the site. This information
must describe how the steps for selecting and designing storm water pollutant control BMPs
presented in Section 5.1 of the BMP Design Manual were followed, and the results (type of
BMPs selected). For projects requiring hydromodification flow control BMPs, indicate whether
pollutant control and flow control BMPs are integrated together or separate.
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" eng ineered 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).
[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:
□ 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 secti on below)
Discussion (as needed):
12/18/2017
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 Contents Checklist
Sequence
Attachment 1 a DMA Exhibit (Required)
Attachment 1 b
Attachment 1 c
Attachment 1 d
See DMA Exhibit Checklist on the
back of this Attachment cover sheet.
(24"x36" Exhibit typically required)
Tabular Summary of DMAs Showing
OMA ID matching OMA Exhibit, DMA
Area, and DMA Type (Required)*
*Provide table in this Attachment OR
on DMA Exhibit in Attachment 1 a
Form 1-7, 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 1-7.
Form 1-8, 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 1-8.
0Included
¢Included on DMA Exh ibit in
Attachment 1 a
□ Included as Attachment 1 b,
separate from OMA Exhibit
~Included
□ Not included because the entire
project will use infiltration BMPs
¢Included
□ Not included because the entire
project will use harvest and use
BMPs
Attachment 1e Pollutant Control BMP Design ~Included
Worksheets / Calculations (Required)
Refer to Appendices B and E of the
BMP Design Manual for structural
pollutant control BMP design
guidelines
Use this checklist to ensure the required information has been included on the OMA
The DMA Exhibit must identify:
¢Underlying hydrologic soil group
¢ Approximate depth to groundwater
Exhibit:
¢Existing natural hydrologic features (watercourses, seeps, springs, wetlands)
¢ Critical coarse sediment yield areas to be protected (if present)
v'f 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 OMA areas (square
footage or acreage), and OMA type (i.e., drains to BMP, self-retaining, or self-mitigating)
¢Structural BMPs (identify location and type of BMP)
I
I
I
I
I
I
I
I
I
> .......
~ Ill)
)
Pre --
DMA
X (Sheet flow to Street)
Y (Sheet flow to Bluff)
Z(Ocean)
Total
'fl@
I Impervious Area I
1,712.00
1,830.00
3,542.00
ii COFFEY ENGINEERING, INC.
Pervious Area I Total (SF)
546.00 2,258.00
4,663.00 6,493.00
4,849.00
5,209.00 13,600.00
I BASIN YI
I Total (AC) I C-Value I Q(CFS) I % Imp.
0.0521 0.711 0.251 75.821
0.1491 0.331 0.331 28.181
0.111
0.312 0.58 I
BASINX
··~
LEGEND
DESCRIPTION
PROPERTY LINE
EXISTING CONTOUR
PROPOSED CONTOUR
DIRECTION OF FLOW
PVC PIPE
OMA LIMIT
IMPERVIOUS AREAS
PERVIOUS AREAS
PACIFIC OCEAN
SYMBOL
---90---
---90---
I I
Eid
SITE CHARACTERISTICS
• HYDROLOGIC SOIL GROUP ........... A
• APPROXIMATE DEPTH TO GROUND
WATER ......... >24'
• CRITICAL COARSE SEDIMENT
YIELD AREAS ........... NONE PRESENT ON SITE
SCALE: 1 n=20'
OMA MAP ~':EXISTING CONDITIONS
MOSS RESIDENCE
5015 TIERRA DEL ORO ST CARLSBAD CA 92008-4351
I
I
I
I
I
I
I
I
I
> --...,
'(,
~ll :..)
:)
Post
OMA
A (Biofiltration)
B (Sheet flow to Bluff)
C (Ocean)
D (Sheet Flow to Street)
Total
'{}@
\
Impervious Area
3,607.00
0.00
206.00
3,813.00
!§ COFFEY ENGINEERING, INC.
Pervious Area Total (SF) Total (AC) C-Value Q(CFS)
608.00 4,215.00 0.097 0.78 0.52
4,330.00 4,330.00 0.099 0.10 0.07
4,849.00 0.111
0.00 206.00 0.005 0.90 0.03
4,938.00 13,600.00 0.312 0.62
-,.
%Imp.
85.58
0.00
100.00
LEGEND
DESCRIPTION SYMBOL
! PROPERTY LINE
EXISTING CONTOUR 90
PROPOSED CONTOUR 90
DIRECTION OF FLOW
PVC PIPE
OMA LIMIT
IMPERVIOUS AREAS I I
PERVIOUS AREAS I I
BASINDh I I PACIFIC OCEAN EiBd
I BAS/NA I
SCALE: 1 "=20'
SITE CHARACTERISTICS
• HYDROLOGIC SOIL GROUP ........... A .. ,· • APPROXIMATE DEPTH TO GROUND
WATER ......... >24'
• CRITICAL COARSE SEDIMENT .. YIELD AREAS ........... NONE PRESENT ON SITE
~ ..
OMA MAP 'B ': PROPOSED CONDITIONS
MOSS RESIDENCE
5015 TIERRA DEL ORO ST CARLSBAD CA 92008-4351
Appendix I:
Forms and Checklists
IE"~ ,,.:-,' .,7;..,-,·~~.....,.~f ~ ~,r-;-;-·~":"' ,r,,·:;~-,;!'t:;r::•";;!;'.~:-,;.-~·.,,,.•,"""'.,_;.-1 ,~ ,., • V ' / ,"" ,-....,.,.,," ,~-r~·~ ~,.,.-r"". ~l
::~.· .. Ha~est apd U~e Fe~~i6ili_ty Chec~sf : , Forni 1-7 J
~. •"r :1' .-i.::~_ ..... ,,~ ... ~~, t~""~ __ ,..,.. ,.;...i.•~-:& ·,..., "'· ~ ~ ~J:...~ ~''!!,~(L~.a ~ .,:, .... "' . 1. ,.:..,..,,:...1.,.J.,..~ .. ..,, -.1.. ~ .lJ
1. Is there a demand for harvested water ( check all that apply) at the project site that is reliably present during
the wet season? lilf Toilet and urinal flushing
!iZ1' Landscape irrigation
D Other: ______ _
2. If there is a demand; estimate the anticipated average wet season demand over a period of 36 hours.
Guidance for planning level demand calculations for toilet/urinal flushing and landscape irrigation is provided
in Section B.3.2.
[Provide a summary of calculations here]
4 residents/residence x 9.3 gallons/resident/day/ 7.48 gallons/cubic foot x 36 hours /
24hours/day = 7.45 cubic feet/residence
1 Residence x 7.45 cubic feet/residence= 7.45 cubic feet
3. 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?
D Yes / £No ~
-0,
Harvest and use appears to be feasible.
Conduct more detailed evaluation and
sizing calculations to confirm that DCV
can be used at an adequate rate to meet
drawdown criteria.
36. Is the 36 hour demand greater than
0.25DCV but less than the full DCV?
□ Yes / t1' No ~
.0,
Harvest and use may be feasible. Conduct
more detailed evaluation and sizing
calculations to determine feasibility.
Harvest and use may only be able to be
used for a portion of the site, or
(optionally) the storage may need to be
upsized to meet long term capture targets
while draining in longer than 36 hours.
Is harvest and use feasible based on further evaluation?
□ Yes, refer to Appendix E to select and size harvest and use BMPs.
i No, select alternate BMPs.
BMP Design Manual-Appendices
December 2015 I-3
3c. Is the 36 hour
demand less than
0.25DCV?
r£ Yes
JJ.
Harvest and use is
considered to be
infeasible.
CITYOF CHULA VISTA
Moss 07-9342
Appendix I: Forms and Checklists
Part t -Full Infiltration Feasibility Screening Criteria
Would infiltration of the full design volume be feaaible from a physical perspective without any undesirable
consequences that cannot be reasonably mitigated?
Criteria Screening Quesuon
Is the estimated reliable infiltration rate below proposed
facility locations greater than 0.5 inches pet how? The response
to this Screening Question shaU be based on a comprehensive
evaluation of the factors presented in Appendix C.2 and Appendix
D.
Provide basis:
Yes No
X
The infillration 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 BMP 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, dara sources, etc. Provide narrative
discussion of study/ data source applicability.
2
Can infiltration greater than 0.5 inches per hour be allowed
without increasing risk of gcotechnical hazards (slope stability,
groundwater mounding, utilities, or other factors) that cannot
be mitigated to an acceptable level? 'The response to this
Screening Question shall be based on a comprehensive evaluation of
the factors presented in Appendix C.2.
Provide basis:
X
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 infillration 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 lnfillration BMPs" for details of the
comprehensive evaluatioo and investigation conducted. simple open pit test rates and simple open pit rate to infiltralton 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.
1-3 February 2016
Moss 07-9342
Appendix I: Fonns and Checklists
Ctitcri
a
3
Screening Question
Can infiltration greater than 0.5 inches per hour be allowed
without increasing risk of groundwater contamination (shallow
water table, storm water pollutants O< other factors) that cannot
be mitigated to an acceptable level? The response to this
Screening Question shall be based on a comprehensive evaluation of
the factors presented in Appendix C.3.
Provide basis:
Yes No
X
TM infiltration test results below the proposed facilily 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 Geotechnlcal Investigation Proposed Storm Water Infiltration BMPs-for details of the
comprehensive evaluation and investigation conducted, simple open pit test rales and simple open pit rate to infiltraUon rate
calculations and maps representaUvc of the study.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/ data source applicability.
4
Can infiltration greatec th:,n 0.5 inches per hour be allowed
without causing potential water balance issues such as ch:a.nge
of seasonality of ephemeral str<..-ams or increased disch:,cge of
contaminated gtoundwater to surface waters? The cesponse to
this Screening Question shall be based on a comprehensive
evaluation of the factocs presented in Appendix C.3.
Provide basis:
Question to be answered by the design engineer.
X
Coffey Engineering: The site does not have
ephemeral str eams or existing areas where
stormwater concentrates prior to leaving the
site .
Summarize findings of studies; provide reference to studies, calculations, maps, data soucces, etc. Provide narrative
discussion of study/ data source appucability.
Part 1
Result
"'
If all ans-..\'CtS to rows 1 -4 arc "Yes" a full infiltration design is porentially feasible.
The feasibility screening category is Full Infiltr,ition
If any answer from row 1-4 is "No", jnfiltmtion may be possible to some extent but
would not generally be feasible or desirable to achieve• "fuU infiltration" design.
Proceed to Part 2
Full
Inf .
•To be completed using gathered site information and best professional judgment considering the definition of MEP in
the MS4 Pennit. Additional testing and/or studies may be required by the City to subscantiate findings.
1-4 February 2016
Moss 07 -9342
Appendix I: Forms and Checklists
.,, --'" . ,_ s· -'"".':,.--nJ!' i,,-.'ot,i:~{~~!~~'.; "·' >-,::~ .. . I. ,, , i:C01,111i e:111 ----
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
5 appreciable rate or volume? The response to this Screening X
Question shall be based on • comprehensive evaluation of the
factors presented in Appendix C.2 and Appendix D.
Provide basis:
The infillration 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 end our geotechncial investigalion conducted on the site, ii is our opinion that the
geologic conditions aHow for appreciable Infiltration.
Please refer lo 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 nfstudy/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 gcotcchnical 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 shaU be based on a comprehensive
evaluation of the factors presented in Appendix C.2,
Provide basis:
In our opinion, any long lemn partial infillration al the site will not result in geolechnical hazards whlctl cannot be reasonable mitigated 10 an acceptable level.
Please refer to our "Report of Limited Geotechnical Investigation Proposed Storm Water Infiltration BMPs· for details of the
comprohonsive evaluation arid investigation conducted, slmple open pit tesl rates and simple open pit rate to infiltration rate
calculations and maps representative of the study.
Summarize lin,ling, of studies; pnwide reference to studies, calculations, maps, data sources, ere. Provide narrative
discussion of srudr/dara source applicabilit)' and whr it was not fca~ible to mitigate low infiltration tares.
1-5 February 2016
Moss 07-9342
Appendix I: Forms and Checklists
,,...1.. . 'r ... ~C\ ... , .,.:.J .. , , .,. ~,:'·, .:.: · .. ·•~~~·~ ••• 's :t.r;=-,11'8:ll~r.,ir,•~!'°'·'·;i
Criteria Screening Question Yes No
Can Infiltration in any appreciable quantity be allowed
without posing significant risk for groundwater related
7 concerns (shallow water table, storm water pollutants or other
factors)? The response to this Screcniog Question shall be based X
on a comprehensive evaluation of the factors presented in
AppendLx 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 Geotechnlcal Investigation Proposed Storm Water Infiltration BMPs· for details of the
comprehensive evaluation and lnvesUgalion conducted, simple open pit test rates and simple open pit rate lo infiltration rote 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 wate.r rights? The response to this Screening Question shall be X based on a comprehensive evaluation of the fuctors 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 studr/ data source applicability and why it was not feasible to mitii,,ate low infiltration rates.
If aU answers from row 5-8 are yes then partial infiltration design is potentially feasible.
Part 2 1be 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.
.. •To be completed usrng gathered Slte mformauon and best profess10n•I 1udgmenr cons1dermg the defimt1on of MEP 1n
the MS4 Pennit. Additional testing and/or studies may be required br the City to substantiate findings.
1-6 February 2016
If These Sources Will Be
on the Project Site ...
1
Potential Sources of
Runoff Pollutants
0 A. Onsite storm drain
inlets
D Not Applicable
Appendix E: BMP Design Fact Sheets
liiiii
. .. Then Your SWQMP Must Consider These Source Control BMPs
2
Permanent Controls-Show on
Drawings
-1 Locations of inlets.
-3
Permanent Controls-List in Table
and Narrative
~ Mark all inlets with the words "No
Dumping! Flows to Bay" or similar.
See stencil template provided in
Appendix I-4
E-4
4
Operational BMPs-lnclude in
Table and Narrative
□ Maintain and periodically repaint
or replace inlet markings.
□ Provide storm water pollution
prevention information to new
site owners, lessees, or operators.
□ See applicable operational BMPs
in Fact Sheet SC-44, "Drainage
System Maintenance," in the
CASQA Storm Water Quality
Handbooks at
www.casqa.org/resources/bmp-
handbooks /municipal-bmp-
handbook.
□ 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."
February 26, 2016
If These Sources Will Be
on the Project Site ...
□
~
□
~
1
Potential Sources of
Runoff Pollutants
B. Interior floor
drains and elevator
shaft sump pumps
Not Aeelicable
C. Interior parking
garages
Not Applicable
□ D1. Need for future
indoor & structural
pest control
~ Not Applicable
Appendix E: BMP Design Fact Sheets
. .. ThenYour SWQMP must considerThese Source Control BMPs
2
Permanent Controls-Show on
Drawings
3
Permanent Controls-List in Table
and Narrative
□ State that interior floor drains and
elevator shaft sump pumps will be
plumbed to sanitary sewer.
□ State that parking garage floor
drains will be plumbed to the
sanitary sewer.
□ Note building design features that
discourage entry of pests.
E-5
4
Operational BMPs-lnclude in
Table and Narrative
□ Inspect and maintain drains to
prevent blockages and overflow.
□ Inspect and maintain drains to
prevent blockages and overflow.
□ Provide Integrated Pest
Management information to
owners, lessees, and operators.
February 26, 2016
If These Sources Will Be
on the Project Site ...
1
Potential Sources of
Runoff Pollutants
li1' DZ. Landscape/
Outdoor Pesticide
Use
D Not Applicable
Appendix E: BMP Design Fact Sheets
Iii
. .. Then Your SWQMP must consider These Source Control BMP
2
Permanent Controls-Show on
Drawings
ii1
□
~
Show locations of existing
trees or areas of shrubs and
ground cover to be
undisturbed and retained.
Show self-retaining landscape
areas, if any.
Show storm water treatment
facilities.
3
Permanent Controls-List in Table and
Narrative
State that final landscape plans will
accomplish all of the following.
51 Preserve existing drought tolerant
trees, shrubs, and ground cover to the
maximwn extent possible.
I 51 Design landscaping to nuru.rruze
irrigation and runoff, to promote
surface infiltration where appropriate,
and to minimize the use of fertilizers
and pesticides that can contribute to
storm water pollution.
51 Where landscaped areas are used to
retain or detain storm water, specify
plants that are tolerant of periodic
saturated soil conditions.
li1' 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
4
Operational BMPs-Include in
Table and Narrative
lit Maintain landscaping using
minimwn or no pesticides.
□ See applicable operational
BMPs in Fact Sheet SC-41,
"Building and Grounds
Maintenance," in the CASQA
Storm Water Quality
Handbooks at
www.casqa.org/resources/bmp
-handbooks/municipal-bmp-
handbook.
□ Provide IPM information to
new owners, lessees and
operators.
February 26, 2016
If These Sources Will Be
on the Project Site ...
1
Potential Sources of
Runoff Pollutants
□ E. Pools, spas,
ponds, decorative
fountains, and other
water features.
!;a' Not Applicable
□ F. Food service
!;a' Not Applicable
Appendix E: BMP Design Fact Sheets
. .. Then Your SWQMP must consider These Source Control BMPs
□
2
Permanent Controls-Show on
Drawings
Show location of water feature
and a sanitary sewer cleanout in
an accessible area within 10 feet.
3
Permanent Controls-List in Table
and Narrative
□ If the local municipality requires
pools to be plumbed to the sanitary
sewer, place a note on the plans and
state in the narrative that this
connection will be made according to
local requirements.
□ For restaurants, grocery stores, I □ Describe the location and features of
the designated cleaning area. and other food service
operations, show location I 0 (indoors or in a covered area
outdoors) of a floor sink or other
area for cleaning floor mats,
containers, and equipment.
□ On the drawing, show a note that
this drain will be connected to a
grease interceptor before
discharging to the sanitary sewer.
Describe the items to be cleaned in
this facility and how it has been sized
to ensure that the largest items can b e
accommodated.
E-7
4
Operational BMPs-lnclude
ill
Table and Narrative
□ See applicable operational
BMPs in Fact Sheet SC-72,
"Fountain and Pool
Maintenance," in the CASQA
Storm Water Quality
Handbooks at
www.casqa.org/resources/bm
p-handbooks/municipal-
bmp-handbook.
February 26, 2016
IfThesc Sources Will
Be on the Project Site
1
Potential Sources
of
□ G. Refuse areas
Gif Not Applicable
Appendix E: BMP Design Fact Sheets
... Then Your SWQMP must consider These Source Control BMPs
2
Permanent Controls-Show
on Drawings
□ Show where site refuse and
recycled materials will be
handled and stored for
pickup. See local municipal
requirements for sizes and
other details of refuse areas.
□ If dumpsters or other
receptacles are outdoors,
show how the designated
area will be covered, graded,
and paved to prevent run-
on and show locations of
berms to prevent runoff
from the area. Also show
how the designated area will
be protected from wind
dispersal.
□ Any drains from dumpsters,
compactors, and tallow bin
areas must be connected to
a grease removal device
before discharge to sanitary
sewer.
3
Permanent Controls-List
in Table and Narrative
□ State how site refuse will
be handled and provide
supporting detail to what
is shown on plans.
□ State that signs will be
posted on or near
dumpsters with the
words "Do not dump
hazardous materials
here" or similar.
E-8
4
Operational BMPs-Include in
Table and Narrative
□ State how the following will be implemented:
Provide adequate number of receptacles. Inspect
receptacles regularly; repair or replace leaky
receptacles. Keep receptacles covered.
Prohibit/prevent dumping of liquid or hazardous
wastes. Post "no hazardous materials" signs. Inspect
and pick up litter daily and clean up spills
immediately. Keep spill control materials available
on-site. See Fact Sheet SC-34, ''Waste Handling and
Disposal" in the CASQA Stom1 Water Quality
Handbooks at www.casqa.org/resources/bmp-
handbooks /municipal-bmp-handbook.
February 26, 2016
1
Potential Sources of
Runoff Pollutants
□ H. Industrial
processes.
lid Not Applicable
□ I. Outdoor storage
of equipment or
materials. (See rows J
and K for source
control measures for
vehicle cleaning,
repair, and
maintenance.)
~ Not Applicable
2
Permanent Controls-Show on
Drawings
□
□
□
Show process area.
Show any outdoor storage
areas, including how materials
will be covered. Show how
areas will be graded and
bermed to prevent run-on or
runoff from area and
protected from wind dispersal.
Storage of non-hazardous
liquids must be covered by a
roof and/ or drain to the
sanitary sewer system, and be
contained by berms, dikes,
liners, or vaults.
□ Storage of hazardous materials
and wastes must be in
compliance with the local
hazardous materials ordinance
and a Hazardous Materials
Management Plan for the site.
Appendix E: BMP Design Fact Sheets
3
Permanent Controls-List in Table and
Narrative
□ If industrial processes are to be located
onsite, state: "All process activities to be
performed indoors. No processes to
drain to exterior or to storm drain
system."
□ Include a detailed description of
materials to be stored, storage areas, and
strnctural features to prevent pollutants
from entering storm drains.
Where appropriate, reference
documentation of compliance with the
requirements of local Hazardous
Materials Programs for:
• Hazardous Waste Generation
• Hazardous Materials Release
Response and Inventory
• California Accidental Release
Prevention Program
• Aboveground Storage Tank
• Uniform Fire Code Article 80
Section 103(b) & ( c) 1991
• U nderground Storage Tank
E-9
4
Operational BMPs-lnclude
in Table and N arrative
Table and Narrative
□ See Fact Sheet SC-10, "Non-
Storm Water Discharges" in
the CASQA Storm Water
Quality Handbooks at
https: //www.casqa.org/resou
rces/bmo-handbooks.
□ See the Fact Sheets SC-31,
"Outdoor Liquid Container
Storage" and SC-33,
"Outdoor Storage of Raw
Materials" in the CASQA
Storm Water Quality
Handbooks at
www.casqa.org/resources/bm
p-handbooks/municipal-bmp-
handboo k.
February 26, 2016
1
Potential Sources of
Runoff Pollutants
D J. Vehicle and
Equipment Cleaning
[iii' Not Applicable
2
Permanent Controls-Show on Drawings
D Show on drawings as appropriate:
(1) Commercial/industrial facilities having
vehicle / equipment cleaning needs must
either provide a covered, berm~d area for
washing acttvittes or discourage
vehicle/ equipment washing by removing
hose bibs and installing signs prohibiting such
uses.
(2) Multi-dwelling complexes must have a
paved, bermed, and covered car wash area
(unless car washing is prohibited onsite and
hoses are provided with an automatic shut-
off to discourage such use).
(3) Washing areas for cars, vehicles, and
equipment must be paved, designed to
prevent run-on to or runoff from the area,
and plumbed to drain to the sanitary sewer.
( 4) 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
3
Permanent Controls-List in
Table and Narrative
D If a car wash area is not
provided, describe measures
taken to discourage onsite
car washing and explain how
these will be enforced.
Appendix E: BMP Design Fact Sheets
4
Operational BMPs-Include in
Table and Narrative
Describe operational measures to
implement the following (if
applicable):
D Washwater from vehicle and
equipment washing operations
must not be discharged to the
storm drain system.
D Car dealerships and similar
may rinse cars with water
only.
D See Fact Sheet SC-21,
''Vehicle and E quipment
Cleaning," in the CASQA
Storm Water Quality
Handbooks at
www.casqa. erg/resources /bm
p-handbooks /municipal-bmp-
handbook.
February 26, 2016
If These Sources Will Be
on the Project Site ...
1
Potential Sources of
Runoff Pollutants
□ K.
Vehicle/Equipment
Repair and
Maintenance
liZI: Not Applicable
□
□
□
Appendix E: BMP Design Fact Sheets
. .. Then Your SWQMP must consider These Source Control BMPs
Permanent Controls-Show on
Drawings
Accommodate all vehicle
equipment repair and
maintenance indoors. Or
designate an outdoor work area
and design the area to protect
from rainfall, run-on runoff, and
wind dispersal.
Show secondary containment for
exterior work areas where motor
oil, brake fluid, gasoline, diesel
fuel, radiator fluid, acid-
containing batteries or other
hazardous materials or hazardous
wastes are used or stored. Drains
must not be installed within the
secondary containment areas.
Add a note on the plans that
states either (1) there are no floor
drains, or (2) floor drains are
connected to wastewater
pretreatment systems prior to
discharge to the sanitary sewer
and an industrial waste discharge
permit will be obtained.
Permanent Controls-List in
Table and Narrative
□
□
□
State that no vehicle repair or
maintenance will be done
outdoors, or else describe the
required features of the
outdoor work area.
State that there are no floor
drains or if there are floor
drains, note the agency from
which an industrial waste
discharge permit will be
obtained and that the design
meets that agency's
requirements.
State that there are no tanks,
containers or sinks to be used
for parts cleaning or rinsing
or, if there are, n ote the
agency from which an
industrial waste discharge
permit will be obtained and
that the design meets that
agency's requirements.
E-11
Operational BMPs-Include in
Table and Narrative
In the report, note that all of the following
restrictions apply to use the site:
□ No person must dispose of, nor permit
the disposal, directly or indirectly of
vehicle fluids, hazardous materials, or
rinsewater from parts cleaning into
storm drains.
II
□ No vehicle fluid removal must be
performed outside a building, nor on
asphalt or ground surfaces, whether
inside or outside a building, except in
such a manner as to ensure that any
spilled fluid will be in an area of
secondary containment. Leaking
vehicle fluids must be contained or
drained from the vehicle immediately.
□ No person must leave unattended drip
parts or other open containers
containing vehicle fluid, unless such
containers are in use or in an area of
secondary containment.
February 26, 2016
0
~
1
Potential Sources of
Runoff Pollutants
2
Permanent Controls-Show on
Drawings
L. Fuel Dispensing I 0 Fueling areas 16 must have
impermeable floors (i.e., portland
cement concrete or equivalent smooth
impervious surface) that are (1) graded
Areas
Not Applicable
at the minimum slope necessary to
prevent ponding; and (2) separated
from the rest of the site by a grade
break that prevents run-on of storm
water to the MEP.
0 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.
3
Permanent Controls-List
in Table and Narrative
Appendix E: BMP Design Fact Sheets
4
Operational BMPs-lnclude in
Table and Narrative
0 The property owner must dry sweep
the fueling area routinely.
0 See the Business Guide Sheet,
"Automotive Service-Service
Stations" in the CASQA Storm
Water Quality Handbooks at
https: / /www .casqa.org/resources /6
mp-handbooks.
16 The fueling area must be defined as the area extending a minimum of 6.5 feet from the comer 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
1
Potential Sources of
Runoff Pollutants
M. Loading Docks
~ Not Applicable
2
Permanent Controls-Show on
Drawings
□ Show a preliminary design for the
loading dock area, including
roofing and drainage. Loading
docks must be covered and/ or
graded to minimize run-on to and
runoff from the loading area. Roof
downspouts must be positioned to
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.
□ 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.
□ Provide a roof overhang over the
loading area or install door skirts
( cowling) at each bay that enclose
the end of the trailer.
3
Permanent
Controls-List in
E-13
Appendix E: BMP Design Fact Sheets
4
Operational BMPs-lnclude in
Table and Narrativ e
□ Move loaded and unloaded items indoors as
soon as possible.
□ See Fact Sheet SC-30, "Outdoor Loading and
Unloading," in the CASQA Storm Water
Quality Handbooks at
www.casqa.org/resources /bmp-
handbooks /municipal-bmp-handbook.
·February 26, 2016
1
Potential Sources of
Runoff Pollutants
□ N. Fire Sprinkler
Test Water
0 Not Applicable
0. Miscellaneous Drain
or Wash \Vater
□ Boiler drain lines
□ Condensate drain
lines
□ Rooftop
equipment
□ Drainage sumps
□ Roofing, gutters,
and trim
□ Not Applicable
Appendix E: BMP Design Fact Sheets
2 3
Permanent Controls-Permanent Controls-List in Table and
Show on Drawings Narrative
~ Provide a means to drain fire sprinkler test water
to the sanitary sewer.
□ Boiler drain lines must be directly or indirectly
connected to the sanitary sewer system and may
not discharge to the storm drain system.
□ Condensate drain lines may discharge to
landscaped areas if the flow is small enough that
runoff will not occur. Condensate drain lines
may not discharge to the storm drain system.
□ Rooftop mounted equipment with potential to
produce pollutants must be roofed and/ or have
secondary containment.
□ Any drainage sumps onsite must feature a
sediment sump to reduce the quantity of
sediment in pumped water.
□ Avoid roofing, gutters, and trim made of copper
or other unprotected metals that may leach into
runoff
E-14
4
Operational BMPs-lnclude in
Table and Narrative
l!i' See the note in Fact Sheet SC-
41, "Building and Grounds
Maintenance," in the CASQA
Storm Water Quality
Handbooks at
www.casqa.org/resources/bm
p-handbooks/municipal-bmp-
bandbook
February 26, 2016
1
Potential Sources of
Runoff Pollutants
6Z{ P.
sidewalks,
parking lots.
0 Not Applicable
Plazas,
and
2
Permanent Controls-Show on
Drawings
3
Permanent Controls-List in
Table and Narrative
E-15
Appendix E: BMP De sign Fact Sheets
4
Operational BMPs-Include in
Table and Narrative
li2f Plazas, sidewalks, and parking lots must
be swept regularly to prevent the
accumulation of litter and debris.
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.
February 26, 2016
I
I
I
I
Storm Water Standards
San Diego County
85 th Percentile lsopluvials
Legend
--SStn PERCENTILE ISOPLIJVIAL CJ INCORPORATED CITY
NOTE:
The 85th percentile IS a 24 hOIX ranfall total
It represetns a vaue such that 85% of the
observed 24 houf raintan totals win be less than that value.
N + ~ .... 0 1 2 4 I I
,...-,. .. ~NIH01.:'"~(>.-.,.,.,o,c.._,1...:,i (ID""llflaCR-IEOIICl.lO<QaJINOflrVl'COT0,1-.1:M'UD -.,...,oo,:~~•NCff"HEl;IIIFOll:•_..0.I.AII' ~ ... 1,.--,...., __ ...,,.. __ s,..~ ""'°"""'-~---~------M>OG"'---"__, ____ ..,,
_.,_.., _ _.,ao.,.·..,..•S.OS ........ ==--=-=-·~.:..·::=:::=i;.~-__ .,,. .......,,~
c.rc,w:is-c-.~, ¥---f'I.IIMl._,_ ___ Do --------~--.,.,
"""'"' ,.,._c., __ • .,,.,_~-.:0_;,,t1s,
fJC~Cl9"..>.r,.. •
Part 1: BMP Design Manual
January 2016 Edition
WEG
=<ifs 1--'I.-~~°"""' ..................
Appendix B: Storm Water Pollutant Control Hydrologic Calculations and Sizing Methods
/ .:.J
Figure B.1-1: 85th Percentile 24-hour lsopluvial Map
B-7
City of San Diego
~
Tf ~SPORTATION ORM WATER
Drainage Management Area
Surface Type Runoff Factor Area (Ft )
Concrete or Ashphalt 0.9 3607
Natural (A Soil) 0.1 608
Total 4215
Weighted Runoff Factor 0.78
Tin l{j, J,l.L!, \l nt• ljffi1 \} :ilj l 'L'Im/Jill:O
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 TCV= 0.000 cubic-feet
5 Rain barrels volume reduction RCV = 0.000 cubic-feet
6 Calculated DCV = (3630 x C x d x A) -TCV · RCV DCV= 158.906 cubic-feet
Appendix B: Stormwatcr Pollutant Control Hydrologic Calculations and Sizing Methods
B.4.1 Simple Method
Stepw ise Instructions:
1
2
3
4
5
6
l . Compute DCV using Workshecl B.4-1
2. Estimate design infdtraLion rate using \Vorksheet D.5-1
3. Design BlVlP(s) to ensure that the DCV is fully retained (i.e., no surface discharge <luring the
design event) and the store<l effect.ive depth draws clown in no longer than 36 hours.
Worksheet B.4-1: Simple Sizing Method for Infiltration BMPs
Simple Sizing Method for Infiltration BMPs Worksheet B.4-1
DCV (\Xlorkshee1 B 2.1) DCV= 158.91 cubic-feet
Estimated design infilLration rate (Worksheet 0.5-1) l(,ks,,.,= 1.74 in/hr
Available BMP surface area All,11'= 81.81 sq-ft -
Average effective depth in the BMP footprint (DCV / 1\1~n,) D,11,= 1.94 feet
Drawdown time, T (0,,., *12/K""""') T= 13.38 hours
Provide alternat.ive calculation of drawdown time, if nee<led.
Notes:
• Drawdown time must be less than 36 hours. This criterion was set to achieve average annual
capture o[ 80% to account for back to back storms (Sec rationale in Section B.4.3). T n order
to use a different drawdown time, J3MPs should be sized using the percent capture melho<l
(Seel ion B.4.2).
• The average effective depth calculat.ion should account for any aggregate/ media in the Bl\1P.
For example, 4 feel of stone at a porosity of 0.4 would equate to 1.6 feet of effective depth.
• This method may overestimate drawdown Lime for BMPs that drain through both the
bottom and walls of the system. BMP specific calcula1jons of drawdown time may be
provided that account for BMV-specific geometry.
B-19 February 2016
Moss 07-9342 Appendix I: Forms and Checklists
...• ,' -------· .,._ ·--.~ l~• f . ... , . , ,,,ae~,_. .. n • • -. ~-.... ..., ..,,;:.. •t ~-""--'-\' ·,.r;n 17:'1 :TL"!n 1:.11i11Jl~ . ..'JI
-··•. r •.
Facmr C,itcgory Factor Descnpoon Assigned Factor Product (p)
\'\ic,ght (w) Value (v) p==wx\"
Soil assessment methods 0.25 2 0.5
Predominant soil texture 0.25 2 0.5
Suitability Site soil variability 0.25 2 0.5 A Assessment Depth to groundwater / impervious 0.25 ' 0.25 layer
Suitability Assessment Safety !'actor, SA = rp 1.75
J .evd of pretreatment/ expected 0.5 2 1 sediment loads
B Design Redundancy/ resiliency 0.25 3 0.75
Compaction during construction 0.25 2 0.5
Design Safety !'actor, S11 = Lp 2 .25
Combined Safety Factor, s, .... ,= s,, X Ss 4. 0
Observed Infiltration Rate, inch/hr, Ko,,""'""
(corrected for test-spcc,fic bias) 6 . 95
Design Infiltration Rate, in/hr, K.J,,.,n = l<oo.m,J / S,,,,., 1 .74
Supporting Data ,_ ___ -·-... ·-··-· --
Briefly describe infiltration test and provide reference to test forms:
Simple open pit testing was performed at 2 locations within er adjacent to the proposed facih1y per tile requirements of the
Cily or Cartsbad SI01rn Water Standards, BMP Desrgn Manual, in accordance with Appendix D.
Please refer to our "Report of Limited Geolechnical Investigation Proposed Storm Waler Infiltration BMPs" for details of the
compretrnnsive evaluation and investigation conducted. simple open pit test rates and simple open pit rale 10 inflltratfon rate
calculations and maps representative of the study.
I-7 February 2016
ATT AC HM ENT 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 LJ Included
Exhibit (Required)
See Hydromodification Management
Exhibit Checklist on the back of this
Attachment cover sheet.
Attachment 2b Management of Critical Coarse I I 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
D 6.2.1 Verification of Geomorphic
Landscape Units Onsite
L 6.2.2 Downstream Systems
Sensitivity to Coarse Sediment
LJ 6.2.3 Optional Additional Analysis
of Potential Critical Coarse
Sediment Yield Areas Onsite
Attachment 2c Geomorphic Assessment of Receiving l l Not performed
Channels (Optional) LJ Included
See Section 6.3.4 of the BMP Design
Manual.
Attachment 2d Flow Control Facility Design and rJ Included
Structural BMP Drawdown
Calculations (Required)
See Chapter 6 and Appendix G of the
BMP Desiqn Manual
Use this checklist to ensure the required information has been included on the
Hydromodification Management Exhibit:
The Hydromodification Management Exhibit must identify:
lJ Underlying hydrologic soil group
[J Approximate depth to groundwater
r Existing natural hydrologic features ( watercourses, seeps, springs, wetlands)
r-1 Critical coarse sediment yield areas to be protected (if present)
lJ Existing topography
Existing and proposed site drainage network and connections to drainage offsite
lJ Proposed grading
n Proposed impervious features
□ Proposed design features and surface treatments used to minimize imperviousness
Point(s) of Compliance (POC) for Hydromodification Management
D Existing and proposed drainage boundary and drainage area to each POC (when necessary,
create separate exhibits for pre-development and post-project conditions)
n Structural BMPs for hydromodification management (identify location, type of BMP, and
size/detail)
IHYDROMODIFICATION EXEMPT EXHIBIT -MOSS RESIDENCE I
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.
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:
v'l" 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
D When applicable, necessary special training or certification requirements for
inspection and maintenance personnel such as confined space entry or
hazardous waste management
ATTACHMENT 3A
Maintenance Plan
Moss Residence
Treatment BMP Maintenance Plan for Vegetated BMPs
Typical Maintenance lndicator(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 411
•
Overgrown vegetation
Eros ion 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,
Erosion due to concentrated storm water runoff flow adding stone at flow entry points, or minor re-grading to
restore proper drainage according to the original plan. If the
issue is not corrected by restoring the BMP to the original plan
and grade, the 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 co mpacted 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.
Moss Residence
Treatment BMP Maintenance Plan
Maintenance Indicators and Actions for Detention BMPs
Typical Maintenance lndicator(s)
for Detention Basins Maintenance Activities
Poor vegetation establish ment Re-seed, re-establish vegetation.
Erosion due to concent rated 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
wat er runoff flow of 4".
Repair/re-seed/re-plant eroded areas and make appropriate
Erosion due to concent rated irrigation flow corrective measures such as adding erosion control blanket s,
add ing 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
2
Moss Residence
Treatment BMP Maintenance Plan
Maintenance of Bioretention BMPs
• Access of Structural BMPs for Insp ection and Mainten ance
o The Bioretention BMP consists of one (1) vegetated areas:
• IMP A -118 ft:2
o A 1'x1' 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'.
o 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.
o The bioretention basin is accessible from the front yard of the private residence.
• Maintenan ce T hresholds
o Any grasses within the bioretention areas shall be cut when in excess of 4" tall.
o Debris & sediment shall be cleared from the basin when 2" have accumulated.
o Any amount sediment or debris accumulation observed within the overflow inlet
shall be removed when seen.
o During routine landscape maintenance activities, if bare areas or erosion are
observed they shall be re-seeded.
o If standing water is observed for longer than 24-hours the soil media shall be
inspected for clogging and cleaned.
• Bioretention Soil Media Replacem ent
o Soil media within the bioretention area shall be replaced when the filtration rate
drops below S" /hour if regular maintenance cannot restore this rate.
• Recommended Maintenance E quipment
o E quipmen t needed for maintenance will typically include those needed for routine
landscape maintenance:
■ H and Shovels
■ Wheel barrows
■ Lawn mower
■ Hedge clippers
■ Other
• Special T raining
o Maintenance and inspection activities required are typical for routine landscape
maintenance. No special training required.
3
ATTACHMENT 4
City standard Single Sheet BMP (SSBMP) Exhibit
[Use the City's standard Single Sheet BMP Plan.]
Use this checklist to ensure the required information has been included on the plans:
The plans must identify:
Q1' Structural BMP(s) with ID numbers matching Form 1-6 Summary of PDP Structural BMPs
iiZI' The grading and drainage design shown on the plans must be consistent with the delineation of
DMAs shown on the OMA exhibit
1;21' Details and specifications for construction of structural BMP(s)
iiZI' Signage indicating the location and boundary of structural BMP(s) as required by the [City Engineer]
iiZI' How to access the structural BMP(s) to inspect and perform maintenance
Gt 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 BM P
and compare to maintenance thresholds)
Gt Manufacturer and part number for proprietary parts of structural BMP(s) when applicable
Gt Maintenance thresholds specific to the structural BM P(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 BMP)
Gt Recommended equipment to perform maintenance
Cit when applicable, necessary special training or certification requirements for inspection and
maintenance personnel such as confined space entry or hazardous waste management
D Include landscaping plan sheets showing vegetation requirements for vegetated structural BMP(s)
Cit All BM Ps must be fully dimensioned on the plans
l:t 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.
Page Insert Page# of Insert Total# of Pages
PDP SWQMP Date: Click here to enter a date.
PDP SWQMP Template Date: January 2016
I I
I
I
I
I
;~
t2 I
~, ., ,,_ 1;:1'
VJ
I
I
I
I
I
I
I
f-
IQ 0 ,._----1
nl re -~ Ice:, ~, ~. 'fi ~. fl//,! /J \,DI '9/()1'_/.f 02" '/' v;, , I I,--' _._, ,1 U -/'/ LUUL,,~u C::/\.'.:::,,-'C:-'../.c...._.__,
c1 r::: f ' '-'"' I u t.1/
PER BEACH ACCESS EASEMENT
f"
10 20 30
i
I
SCALE: I"= 1 O'
I
.flr,/ JJ!Lii u'7J
BMP TABLE
I !
--• I I
!
I I I
I
I
I
I
I
I
I I
I
I
i
-r /
/ /
I i
I
I
I I ,I
I I
I I I
sl /
I
A
I
BMP ID# BMPTYPE SYMBOL CASQA NO. QUANTITY DRAWING NO. SHEET NO.(S) INSPECTION MAINTENANCE
FREQUENCY FREQUENCY
TREATMENT CONTROL & HYDROMODIFICATION
BIORETENTION G) f:-:-:-:-1 TC-32 118 S.F. 503-9A 2 * ANNUALLY AREA (SEE BELOW)
LOW IMPACT DESIGN (L.I.D.)
@ ROOF DRAIN TO @~ 503-9A 2 QUARTERLY ANNUALLY LANDSCAPING SD-11 9 EA.
SOURCE CONTROL
® DRAINAGE SYS. ii 503-9A 2 * ANNUALLY MAINTENANCE SC-44 10 EA. (SEE BELOW)
* WEEKLY DURING RAINY SEASON/ QUARTERLY DURING DRY SEASON
CONSTRUCTION
SIGN OFF
I
I
1W 31.04
TRW 30.7
BW 29.5
GR NO. 2017-0061
I
I
*
SD-6
SD-1
MAINTENANCE AGREEMENT DOCUMENT: YES _X__ NO
RECORDATION NO. _____ _
PARTY RESPONSIBLE FOR MAINTENANCE:
NAME STEVE MOSS ----------
ADDRESS 25408 COLETTE WAY
CALPSASAS,CA
91302
PHONE NO. (818)996·2000
PLAN PREPARED BY:
_ NAME JOHN COFFEY
CONTACT STEVE MOSS
COMPANY COFFEY ENGINEERING, INC.
ADDRESS 9666 BUSINESSPARKAVE. SUITE 210
SAN DIEGO, CA
92131
PHONE NO. (858) 831-0111 CERTIFICATION _6_27~1~6 __ _
BMP NOTES:
1. THESE BMPS ARE MANDATORY TO BE INSTALLED PER MANUFACTURER'S
RECOMMENDATIONS OR THESE PLANS.
2. NO CHANGES TO THE PROPOSED BMPS ON THIS SHEET WITHOUT PRIOR
APPROVAL FROM THE CITY ENGINEER.
3. NO SUBSTITUTIONS TO THE MATERIAL OR TYPES OR PLANTING TYPES
WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER.
4. NO OCCUPANCY WILL BE GRANTED UNTIL THE CITY INSPECTION STAFF
HAS INSPECTED THIS PROJECT FOR APPROPRIATE BMP CONSTRUCTION
AND INSTALLATION.
SD-1
~-(P) BUILDING
FOOTPRINT
(P)DS
SD-4
y
SD-3
19
SD-7
·<J.!). ✓'?
"1"1 ! i
.c;'__,l --' I
j
"" ~
I
I
i.fl f ; ;
i I I,•
t++ ~
I
i I ,I :.,"':;.
& ,-
1
r;;'7 I I u
-----30'---
PERMANENT BMP LEGEND
SITE DESIGN BMPS
MAINTAIN NATURAL DRAINAGE PATHWAYS & HYDROLOGIC FEATURES
CONSERVE NATURAL AREAS, SOIL, VEGETATION
MINIMIZE IMPERVIOUS AREA
MINIMIZE SOIL COMPACTION
IMPERVIOUS AREA DISPERSION
RUNOFF COLLECTION
LANDSCAPING W/NATIVE OR DROUGHT TOLERANT SPECIES
SOURCECONTROLBMPS
PREVENT ILLICIT DISCHARGES
STORM DRAIN STENCILING OR SIGNAGE
PROTECT REFUSE/TRASH AREAS FROM RAINFALL,
RUN-ON, RUN-OFF, WIND DESPERSION
ADDITIONAL BMPs BASED ON POTENTIAL SOURCES OF RUNOFF POLLUTION:
ON SITE STORM DRAIN INLETS
LANDSCAPE/OUTDOOR PESTICIDE USE
POOLS, SPAS & OTHER WATER FEATURES
FIRE SPRINKLER TEST WATER
~ 1so-21
ISO-JI
ISD-41
ISD-51
ISD-61
ISD-71
~ 1sc-21
ISC-51
ISC-6.1I
ISC-6.51
ISC-6.61
ISC-6.151
------------------~---------.. ·----------+----I
-----+--------+---------,--·-----
.r
D-.TE Ii !!Tl~:_ :-,--TE i I: '·-L [.:.._T:_ i[IITI.-L
I
--~-'EET
GRADTl-l"._~
k::::~-----t::: ,,; ... -----
:~:::: l[ :D 3'
I -ISPE:: TCR
( :1·r,; -:i-._., l,
El 1,~-[ER:: G DEP>Rfr'E <T
' ·1 -,-" ·c_ :1r,, .-~, I[·,-E' l\J ,:_-, -::--._ /:·_.!j_'-~)i_·, ') ---·--.Llk_) ' . '----·'---'
·1r 1ERR.'-.\ ['1EL i'"'"R,~-. _1_ , t_-~r_,_ , ., _ _.: \'~/
,_.1/i.s-::, <
. _____ ,,_, -, "-~
::IT'' Fi•Ji H:P ~~
D'-i'-:r·-: E:··1·:
,::.,-He-, E.:,,· __ _
f;,';,[ ~ ( ----
j,::,
::HEEE
:,E