HomeMy WebLinkAboutSDP 16-19; DISTRIBUTE LOTS 13-15 SHELL BUILDING; PRIORITY DEVELOPMENT (PDP) STORM WATER QUALITY MANAGEMENT PLAN (SWQMP); 2021-08-04CITY OF CARLSBAD
PRIORITY DEVELOPMENT PROJECT (PDP)
STORM WATER QUALITY MANAGEMENT PLAN (SWQMP)
FOR
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ADDENDUM NO.1
TABLE OF CONTENTS
Certification Page
Project Vicinity Map
FORM E-34 Storm Water Standard Questionnaire
Site Information
FORM E-36 Standard Project Requirement Checklist
Summary of PDP Structural BMPs
Attachment 1: Backup for PDP Pollutant Control BMPs
Attachment 1a: DMA Exhibit
Attachment 1b: Tabular Summary of DMAs and Design Capture Volume Calculations
Attachment 1c: Harvest and Use Feasibility Screening (when applicable)
Attachment 1d: Categorization of Infiltration Feasibility Condition (when applicable)
Attachment 1e: Pollutant Control BMP Design Worksheets / Calculations
Attachment 2: Backup for PDP Hydromodification Control Measures
Attachment 2a: Hydromodification Management Exhibit
Attachment 2b: Management of Critical Coarse Sediment Yield Areas
Attachment 2c: Geomorphic Assessment of Receiving Channels
Attachment 2d: Flow Control Facility Design
Attachment 3: Structural BMP Maintenance Thresholds and Actions
Attachment 4: Single Sheet BMP (SSBMP) Exhibit
________________________________________________________
Engineer of Work's Signature, PE Number & Expiration Date
________________________________________________________
Print Name
________________________________________________________
Company
____________________________
Date
Bill Beaman
AECOM
05/10/21
53930 12/31/21
CERTIFICATION PAGE
Project Name:&$5/6%$'5$&(:$</27
Project ID:6'3 $0(1'
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.
PROJECT VICINITY MAP
Project Name: CARLSBAD RACEWAY LOT 15
Project ID: AMEND2021-0004SDP 16-19/AMEND2021-0004
CITY
PACI FIC
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E-34 Page 1 of 4 REV 02/16
Development Services
Land Development Engineering
1635 Faraday Avenue
(760)602-2750
www.carlsbadca.gov
STORM WATER STANDARDS
QUESTIONNAIRE
E-34
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 PRIORITY
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:PROJECT ID:
ADDRESS:APN:
The project is (check one):New Development Redevelopment
The total proposed disturbed area is: _______ ft
2 (________) acres
The total proposed newly created and/or replaced impervious area is: ______ ft
2 (________) 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.
32,050 0.74
27,539 0.63
GR2017-0004SDP 16-19
AMEND2021-0004
32,981 0.76
28,064 0.64
C cityof
Carlsbad
DEVELOPMENT PROJECT' (PDP)
DGB6
3266 Lionshead Avenue
□
subject to 'STANDARD PROJECT' requirements or be subject to '
2218811600
~
-
E-34 Page 2 of 4 REV 04/17
STEP 1
TO BE COMPLETED FOR ALL PROJECTS
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)?
, provide justification below then go to Step 5
project is
information.
Justification/discussion: (e.g. the project includes only interior remodels within an existing building):
development project go to Step 2.
STEP 2
TO BE COMPLETED FOR ALL DEVELOPMENT PROJECTS
To determine if your project is exempt from PDP requirements pursuant to MS4 Permit Provision E.3.b.(3), please answer
the following questions:
Is your project LIMITED to one or more of the following:
YES NO
1. Constructing new or retrofitting paved sidewalks, bicycle lanes or trails that meet the following criteria:
a) Designed and constructed to direct storm water runoff to adjacent vegetated areas, or other non-
erodible permeable areas;
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 guidance?
2. Retrofitting or redeveloping existing paved alleys, streets, or roads that are designed and constructed in
accordance with the USEPA Green Streets guidance?
3. Ground Mounted Solar Array that meets the criteria provided in section 1.4.2 of the BMP manual?
go to Step 5, mark
EXEMPT
Discussion to justify exemption ( e.g. the project redeveloping existing road designed and constructed in accordance with
the USEPA Green Street guidance):
go to Step 3.
GR2017-0004SDP 16-19
THE PROJECT IS NOT A NEW DEVELOPMENT AND ENTAILS TENANT
IMPROVEMENTS AND CHANGES TO THE PARKING LAYOUT
To determine if your project is a "development project", please answer the following question:
□ ~
If you answered "yes" to the above question , mark the third box stating "my
not a 'development project' and not subject to the requirements of the BMP manual" and complete applicant
If you answered "no" to the above question, the project is a ' , ,
□ ~
□ ~
□ 18:
If you answered "yes" to one or more of the above questions, provide discussion/justification below, then
the second box stating "my project is from PDP ... " and complete applicant information.
If you answered "no" to the above questions, your project is not exempt from PDP,
E-34 Page 3 of 4 REV 04/17
STEP 3
TO BE COMPLETED FOR ALL NEW OR REDEVELOPMENT PROJECTS
To determine if your project is a PDP, please answer the following questions (MS4 Permit Provision E.3.b.(1)):
YES NO
1. Is your project a new development that creates 10,000 square feet or more of impervious surfaces
collectively over the entire project site?This includes commercial, industrial, residential, mixed-use,
and public development projects on public or private land.
2. Is your project a redevelopment project creating and/or replacing 5,000 square feet or more of
impervious surface collectively over the entire project site on an existing site of 10,000 square feet or
more of impervious surface?This includes commercial, industrial, residential, mixed-use, and public
development projects on public or private land.
3. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more
of impervious surface collectively over the entire project site and supports a restaurant? A restaurant is
a facility that sells prepared foods and drinks for consumption, including stationary lunch counters and
refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial
Classification (SIC) code 5812).
4. Is your project a new or redevelopment project that creates 5,000 square feet or more of impervious
surface collectively over the entire project site and supports a hillside development project? A hillside
development project includes development on any natural slope that is twenty-five percent or greater.
5. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more
of impervious surface collectively over the entire project site and supports a parking lot? A parking lot is
a land area or facility for the temporary parking or storage of motor vehicles used personally for
business or for commerce.
6. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more
of impervious street, road, highway, freeway or driveway surface collectively over the entire project
site?A street, road, highway, freeway or driveway is any paved impervious surface used for the
transportation of automobiles, trucks, motorcycles, and other vehicles.
7. Is your project a new or redevelopment project that creates and/or replaces 2,500 square feet or more
of impervious surface collectively over the entire site, and discharges directly to an Environmentally
Sensitive Area (ESA)?cludes flow that is conveyed overland a distance of
200 feet or less from the project to the ESA, or conveyed in a pipe or open channel any distance as an
isolated flow from the project to the ESA (i.e. not commingled with flows from adjacent lands).*
8. Is your project a new development or redevelopment project that creates and/or replaces 5,000 square
feet or more of impervious surface that supports an automotive repair shop?An automotive repair
shop is a facility that is categorized in any one of the following Standard Industrial Classification (SIC)
codes: 5013, 5014, 5541, 7532-7534, or 7536-7539.
9. Is your project a new development or redevelopment project that creates and/or replaces 5,000 square
feet or more of impervious area that supports a retail gasoline outlet (RGO)?This category includes
are feet or more or (b) a project Average Daily
Traffic (ADT) of 100 or more vehicles per day.
10. Is your project a new or redevelopment project that results in the disturbance of one or more acres of land
and are expected to generate pollutants post construction?
11. Is your project located within 200 feet of the Pacific Ocean and (1) creates 2,500 square feet or more of
impervious surface or (2) increases impervious surface on the property by more than 10%? (CMC
21.203.040)
PDP. If your project is a redevelopment
project,go to step 4. If your project is a new project,go to step 5,PDP
and complete applicant information.
STANDARD PROJECT.Go to step 5, check the
□ ~
~ □
□ ~
□ ~
~ □
~ □
"Discharging Directly to " in □ ~
□ ~
RGO's that meet the following criteria: (a) 5,000 squ □ ~
□ ~
□ ~
If you answered "yes" to one or more of the above questions, your project is a
check the first box stating "My project is a " ...
If you answered "no" to all of the above questions, your project is a ' ,
second box stating "My project is a 'STANDARD PROJECT' ... " and complete applicant information.
E-34 Page 4 of 4 REV 04/17
STEP 4
TO BE COMPLETED FOR REDEVELOPMENT PROJECTS THAT ARE PRIORITY DEVELOPMENT PROJECTS (PDP)
ONLY
Complete the questions below regarding your redevelopment project (MS4 Permit Provision E.3.b.(2)):
YES NO
Does the redevelopment project result in the creation or replacement of impervious surface in an amount
of less than 50% of the surface area of the previously existing development? Complete the percent
impervious calculation below:
Existing impervious area (A) = __________________________ sq. ft.
Total proposed newly created or replaced impervious area (B) = _________________________sq. ft.
Percent impervious area created or replaced (B/A)*100 = __________%
surface and not the entire development.Go to step 5,PDP
applicant information.
Go to step 5, check the
PDP
STEP 5
CHECK THE APPROPRIATE BOX AND COMPLETE APPLICANT INFORMATION
My project is a PDP and must comply with PDP stormwater requirements of the BMP Manual. I understand I must
prepare a Storm Water Quality Management Plan (SWQMP)for submittal at time of application.
My project OR EXEMPT
stormwater requirements of the BMP Manual. As part of these requirements Standard Project
Requirement Checklist Form E-36
Note:For projects that are close to meeting the PDP threshold, staff may require detailed impervious area calculations
My Project is
Applicant Information and Signature Box
Applicant Name: Applicant Title:
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 SpecialBiological 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.
This Box for City Use Only
City Concurrence:
YES NO
By:
Date:
Project ID:
Alexandria Smille Project Manager - Applicant
02/09/2021
379,867
379,714
99.95
28,064
7.4
□ ~
If you answered "yes", the structural BMPs required for PDP apply only to the creation or replacement of impervious
check the first box stating "My project is a ... " and complete
If you answered "no," the structural BMP's required for PDP apply to the entire development.
check the first box statinq "My project is a ... " and complete applicant information.
181
□ is a 'STANDARD PROJECT' from PDP and must only comply with 'STANDARD PROJECT'
, I will submit a "
" and incorporate low impact development strategies throughout my project.
and exhibits to verify if 'STANDARD PROJECT' stormwater requirements apply.
□ NOT a 'development project' and is not subject to the requirements of the BMP Manual.
,-··-··-..., ...... -
/l~S~
□ □
SITE INFORMATION CHECKLIST
Project Summary Information
Project Name
Project ID
Project Address
Assessor's Parcel Number(s) (APN(s))
Project Watershed (Hydrologic Unit)Carlsbad 904
Parcel Area ________ Acres (____________ Square Feet)
Existing Impervious Area
(subset of Parcel Area)________ Acres (____________ Square Feet)
Area to be disturbed by the project
(Project Area)________ Acres (____________ Square Feet)
Project Proposed Impervious Area
(subset of Project Area)________ Acres (____________ Square Feet)
Project Proposed Pervious Area
(subset of Project Area)________ Acres (____________ Square Feet)
Note: Proposed Impervious Area + Proposed Pervious Area = Area to be Disturbed by the
Project.
This may be less than the Parcel Area.
Area to be disturbed by
project (Project Area)
________ Acres (____________ Square Feet)
Project Proposed Impervious Area
(subset of Project Area)
________ Acres (____________ Square Feet)
Project Proposed Pervious
Area (subset of Project Area)________ Acres (____________ Square Feet)
CARLSBAD RACEWAY LOT 15
16-024
3266 Lionshead Avenue,
Carlsbad, CA 92010
221-881-16
11.46 499,150
10.58
8.72
1.86
0 0
460,821
379,867
80,954
32,050
379,714
81,107
0.74
8.72
1.86
Revised Summary Information AMEND2021-0004
32,9810.76
378,783
82,0381.88
8.70
904.31
SDP 16-19/AMEND2021-0004
*
**
***
Revised new
*
Revised **
Revised
***
AECOM
300 Lakeside Dr., Ste. 400
Oakland, CA 94612
www.aecom.com
510 893 3600 tel
510 874 3268 fax
March 24, 2021
City of Carlsbad
Land Development Engineering
1635 Faraday Avenue
Carlsbad, CA 92008
Subject: Letter Amendment-Storm Water Quality Management Plan (SWQMP),
Permit No. GR2017-0004, Site Address 3266 Lionshead Avenue, Carlsbad, CA
Attn: Land Development Engineering Department
AECOM is pleased to provide the City of Carlsbad with this written correspondence regarding our
review of the proposed improvements relative to the existing SWQMP for Permit No. GR2017-0004.
Please note, given the insignificant nature of this change, this update or amendment is being
provided mainly for purposes of record keeping so as to document that a very minor change was
made to the parking lot but given the small relative decrease, no change to the amount of runoff for
this area was recognized. The information below summarizes the background and conclusion
associated with this change.
Per the attached Figure 1, AECOM is to remove 29,281 s.f. of existing asphaltic pavement and
replace it with a slightly lesser amount of 28,064 s.f. of proposed asphaltic pavement, resulting in a
small net decrease to the impervious area of 1217 s.f. for this localized area of the site. The location
of the new asphalt is in the exact same location (see Figure 1) as it was previously defined in
SWQMP Permit No. GR2017-0004. As a result of this very small relative change (Existing Area minus
Proposed Area) of (-) 1217 s.f. which equates to (-) 0.028 acres reduction in area, it would potentially
decrease the proposed amount of runoff for this area. However, given the small magnitude of this
reduction in area, the associated runoff that would result is insignificant. With this in mind there is no
change to the runoff amount that gets directed toward the bioretention facility located on the
northwest side ot the parking lot and therefore no change to the SWQMP will be required for Permit
No. GR2017-0004.
Sincerely,
William Beaman
Principal Civil Engineer
A:COM
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REDUCING THE NET RUNOFF TO THE BMP
IMPERVIOUS AREA TO BE INSTALLED 28,064 SQ.FT. CONSTRUCTION LEGEND
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GRAPHIC SCALE
PROJECT
DGB6 -Carlsbad, CA
3266 Lionshead Ave
Carlsbad, CA 92010
CLIENT
CONSULTANT
AECOM
1255 Broad St, Suite 201
Clifton, NJ 07013, USA
973 883 8500 tel
www.aecom.com
Tl-IS DRAW NG --lAS BEEr-J PREPARED FOR THE USE OF A:CCOM'SCJENT A~ID
MAY NOT 8E LSED. '<EP'<ODUCEC :JR RELIED UFON E,VTHIRD PARTIES,
EXCEPT AS AG:ZEEJ BY AECot/ AI\C ITSCLIEN-, AS REOLIREC BY LAW:JR
roR USC DY GOVCRt.JM[NTAL RO.'IONING AGrnCl[S. A[COM ACC[:lTS NO
RESPOI\SIE:ILITY. AND DENIES ANY LIABILITv \1\/HATSC·EVER. T:J ANY PARTY
Tl-AT MOD Fl ES TH S DRA\.Vl~JG wi-H OUT A:CCOM'S EXPRESS v,R1rrn
CONSE\fT
LlU NOi SCi\Uc I Hlb LJUGLM~~J I .~LL lvlb\bLf.1~M=Nlb MUSI 1::~Ul:ll/ll'ICLl
1-f-lUM ::ii Al Cll LllMCNi:ilU~J-::i
IT S THE RESP:JNSIBILITi OFT-IE CONTRACTORS TO INFORM THEMSELVES OF
TI-F FXAr:T I or:ATlm< OF A~J/ ASSIIMF A I I IARII IT"( FOR 1,/\MAGlFTO Al I
UTILITIES. SERVICES AND STRLCTLRES VI.HETH ER ABOVE GROUND OR BELO'/v
G-1/\Lk. l:lCI-Uf-<CCUMMCr-.JCING I Hie WUkK ::CUCH INI-Uf-<MI\I IUN IS N:..11
~IECESSARILY SHOVW-.J ONTI-E JRAV\n~IG. AI\D'/vHERESH:J\/VN, -HE ACCURACY
CAr-.JN:JT BE GJARAWEED .
WITI I Tl [ SOL[ :XC[PTION or Tl I[ □[NCI IMARK(S) SP[ClrlCALL Y J[S::R10:o
FOR THIS PROclECT. NO ELEVATlmJ IND CA TED OR ASSUl'1ED 1-EREON ISTO BE
USED AS A REFEREI\CE ELE\'A-lor-.J FCR ANY PURPOS:C
REGISTRATION
ISSUE/REVISION
1 2021-06-29 2021-05-17 COMMENTS
0 2021-03-24 STORMWATER FIGURE
1/R DATE DESCRIPTION
PROJECT NUMBER
60646117
SHEET TITLE
SWQMP AMENDMENT FOR CARLSBAD
RACEWAY LOTS 13-15 PERMIT NO.
GR2017-0004 SHOWING PROPOSED
IMPERVIOUS LESS THAN EXISTING
SHEET NUMBER
FIGURE 1