HomeMy WebLinkAboutRP 12-31; Bluewater; Redevelopment Permits (RP) (4)•
•
•
STORM WATER MANAGEMENT PLAN
FOR
BLUEWATER RESTAURANT
3162 CARLSBAD BOULEVARD
APN 203 -250 -28 & 29
Prepared By:
Robert Sukup
The Sea Bright Company
4322 Sea Bright Place
Carlsbad, CA 92008
760 -720 -0098
Prepared For
Barry Blue
2950 Ocean Street
Carlsbad, CA 92008
May 2, 2013
•
•
•
TABLE OF CONTENTS
INTFtO[)lJCTION -------------------------------------------------------------------------------1
1.0 Project [)escription --------------------------------------------------------------------1
1.1. Hydrological Unit Contribution -----------------------------------------------1
1.2. Beneficial Use of Coastal Waters -------------------------------------------2
1.2.1. Inland Surface Waters ---------------------------------------------2
1.2.2. Groundwater---------------------------------------------------------2
2.0 CHARACTERIZATION OF PROJECT RlJNOFF ------------------------------2
3.0
4.0
5.0
2.1. Expected Discharges -----------------------------------------------------------3
2 .2. Soil Characteristics --------------------------------------------------------------3
MITIGATION MEASlJRES TO PROTECT WATER QlJALITY -------------3
3.1. Construction BMP's --------------------------------------------------------------3
3.2. Post construction BMP's -------------------------------------------------------3
3.2.1.1 Appropriate Applications and Siting Constraints --------4
OPERATIONS AND MAINTENANCE PROGRAM ---------------------------4
FISCAL RESOlJRCES ---------------------------------------------------------------5
ATTACHMENTS
A. Storm Water Standard Questionnaire
B. HMP Applicability Matrix
C. Project Map with BMPs shown
• INTRODUCTION
•
•
The Stormwater Management Plan [SWMP] requirement is required for projects
that are categorized as a Priority Development Project [PDP] pursuant to the City
of Carlsbad Standard Urban Stormwater Management Plan [SUSMP] and
Carlsbad's Local Coastal Program requirements. After completing the Storm
Water Standards Questionnaire [SWSQ] this project is a PDP. The purpose of
this SWMP is to address the water quality impacts from the proposed
improvements for the proposed Bluewater Restaurant project. Best Management
Practices [BMP's] will be utilized to provide a long term solution to water quality.
This SWMP is also intended to ensure the effectiveness of the BMP's through
proper maintenance that is based on long term fiscal planning. The SWMP is
subject to revisions as needed by the engineer.
1.0 Project Description
The proposed project is to redevelop an existing lot with a total gross acreage of
.42 acres into a new restaurant with associated parking and landscaping. There
are presently about 8 rental units on the site with an asphalt driveway and gravel
parking area. The entire site would be cleared of the existing improvements and
a new restaurant, driveway, parking spaces and landscaping constructed in its
place. The proposed project would result in an increase of impervious area by
more than 1 0% as compared to pre-development conditions.
1.1 Hydrologic Unit Contribution
The Bluewater Restaurant Project is located in the Carlsbad Hydrologic Unit and
more specifically in the El Saito Hydrolic area [unit 4.21 as designated in the San
Diego Basin Plan]. The project area is characterized by an existing fully
developed commercial, multifamily residential, timeshare/motel neighborhood.
The proposed project has most of its drainage waters flowing to a combination of
landscape areas and bioretention facilities. The drainage water is then collected
by a small private drainage system (4" and 6" pipes) that discharge the filtered
water to the city street (Carlsbad Boulevard).
The proposed project will not alter drainage patterns on the site or off site. The
storm water discharge points will not divert runoff from existing conditions. The
reality is that any increase in impervious area results in an increase in runoff.
Therefore, a low impact design of landscaping and an all paver driveway and
parking lot have been introduced to assist in mitigation of minor flows .
Page 1
•
•
•
1.2 Beneficial Uses of Coastal Waters
The beneficial uses for the hydrologic unit are listed below. They have been
extracted from the water quality control plan for the San Diego Basin. The only
one they I have elaborated on that I feel is appropriate is the REC 1.
RECI -Contact Recreation: Includes uses of water for recreation activities
involving body contact with water, where ingestion of water is reasonbly possible.
The uses include, but are not limited to, swimming, wading, water skiing, skin
and SCUBA diving, surfing, white water activities, or fishing.
Other possible benefits indicated in Table 2-3 of the basin plan are Non Contact
Water Recreation, Wildlife Habitat, Preservation of Biological Habitats of Special
Significance, and Rare-Threatened or Endangered Species of Marine Habitat.
1.2.1 Inland Surface Waters
Not Applicable
1.2.2 Groundwater
Not Applicable
2.0 CHARACTERIZATION OF PROJECT RUNOFF
Per the Carlsbad Local Coastal Program, the Pacific Ocean is considered an
Environmentally Sensitive Area [ESA]. This project is not within 200 feet of the
Pacific Ocean but it does propose a restaurant. Therefore the project qualifies as
a Priority Development Project and is subject to SUSMP treatment BMP
standards.
According to the California 2006 303d list published by the San Diego Regional
Water Quality Control Board, the impaired water body nearest this project is the
Pacific Ocean. It's only listed Pollutant Stressor is "Indicator Bacteria" which the
proposed project should not contribute to .
Page2
• 2.1 Expected discharges
There is no sampling data available for the existing site condition. The following
constituents are sometimes found on small restaurant developments such as this
that could affect water quality.
1. Sediment discharge due to construction activities and post construction areas
left bare.
2. Nutrients from fertilizers.
3. Trash and debris deposited in drain inlets.
4. Hydrocarbons from paved areas.
5. Pesticides from landscaping and home use.
2.2 Soil Characteristics
The project area is within soil group A, which is a very good draining soil.
3.0 MITIGATION MEASURES TO PROTECT WATER QUALITY
• To address water quality for the project, BMP's will be implemented during
construction and post construction.
•
3.1 Construction BMP's
The construction BMP's that are anticipated to be utilized during construction are
as follows:
1 . Silt fence
2. Street sweeping if needed.
3. Stockpile management
4. Solid waste management
5. Gravel bag berms
6. Concrete waste management
7. Construction entrance
3.2 Post Construction BMP's
The project, in its effort to comply with LI.D. requirements, is designed to have
Page 3
•
•
•
all the parking lot drainage waters flow to a combination of landscape areas and
bioretention basins. See the attachment for location of bioretention facilities.
3.2.1 Appropriate Applications and Siting Constraints
This project is not large in size [.42 acres] and is challengingly narrow, but the
design accommodates for almost all of the sheet flow run off from rain to go to
the landscape areas. These landscaped areas will provide filtering of the water
as well as some infiltration before they enter the private drainage system.
The project does propose an exterior trash bin area. A roof will be provided over
the top of it to prevent rain waters from entering the bins. As additional
protection, the bins have a lid cover on them that are typically in the closed
position.
The landscape irrigation system will be plant sensitive as well as rain monitored.
4.0 OPERATION AND MAINTENANCE PROGRAM
The maintenance of the landscaping and bioretention basins will be the
responsibility of the Restaurant Owners. The maintenance anticipated is as
follows:
1. Check the bioretention basins and landscaping for proper growth.
2. Remove any accumulation of debris, remove and replace dead plants, and
check the irrigation system for adequate coverage as well as adjustment for
seasonal watering durations and frequencies.
The bioretention basins should be inspected monthly. Any maintenance as
described above needs to be done at that time. Additional inspections should be
made after any large rain event (.5" or greater).
The owner may be required to execute a city standard Permanent BMP
Maintenance Agreement that records against the property. This agreement
outlines the current, prospective and future property owner's obligations to
inspect and maintain treatment BMP's (bioretention basins) on this property to
ensure their effectiveness at removing pollutants from this project.
Page4
• 5.0 FISCAL RESOURCES
Funds for maintenance will be paid by the Restaurant Owners.
Date
•
Page 5
•
• ATTACHMENT "A"
•
•
•
•
•
~ ~ CITY OF
CARLSBAD
STORM WATER
STANDARDS
QUESTIONNAIRE
E-34
Development Services
Land Development Engineering
1635 Faraday Avenue
700-602-2750
www.carlsbadca.gov
you answered you you DEVELOPMENT
PROJECT requirements. Please check the •meets PRIORITY DEVELOPMENT PROJECT requirements" box in Section 3 below. Review
SUSMP to find out if SUSMP requirements apply to your project envelope or the entire project site.
If you answered NO, then you ARE NOT a significant redevelopment and your project is subject to STANDARD STORMWATER
REQUIREMENTS. Please check the "does not meet PDP requirements" box in Section 3 below.
see Footnote on page 2
My project meets PRIORITY DEVELOPMENT PROJECT (PDP) requirements and must comply with additional stormwater criteria
per the SUSMP and I understand I must prepare a Storm Water Management Plan for submittal at time of application. 1 understand
flow control (hydro modification) requirements may apply to my project. Refer to SUSMP for details.
My project does not meet PDP requirements and must only comply with STANDARD STORMWATER REQUIREMENTS per the
low
Applicant Information and Signature Box Thl:lBox for C/ly U. Ollly
City Concunence: L YES I NO
I I By.
Date:
PmjecliD:
E-34 Page 3 of3 REV 1/14/11
•
•
•
~a ~ CITY OF
CARLSBAD
STORM WATER
STANDARDS
QUESTIONNAIRE
E-34
Development Services
Land Development Engineering
1635 Faraday Avenue
700-602-2750
www.carlsbadca.gov
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 (BMP's) into the project design per the City's standard Urban stormwater Management Plan (SUSMP). To
view the SUSMP, refer to the Engineering standards (Volume 4, Chapter 2) at www.carlsbadca.gov/standards.
Initially this questionnaire must be completed by the applicant in advance of submitting for a development application
(subdivision, discretionary permits and/or construction permits). The results of the questionnaire determine the level of
storm water standards that must be applied to a proposed development or redevelopment project. Depending on the
outcome, your project will either be subject to 'Standard Stormwater Requirements' or be subject to additional criteria
called 'Priority Development Project Requirements'. Many aspects of project site design are dependent upon the
storm water standards applied to a project.
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 separate completed and signed questionnaire must be submitted for each new development application submission.
Only one completed and signed questionnaire is required when multiple development applications for the same project
are submitted concurrently. In addition to this questionnaire, you must also complete, sign and submit a Project Threat
Assessment Form with construction permits for the project.
Please start by completing Section 1 and follow the instructions. When completed, sign the form at the end and submit
this with your application to the city.
Does your project meet one or more of the following criteria:
1. Housing subdivisions of 10 or mOte dwelling units. Examples: single family homes, multi-family homes,
condominium and a rtments
2. Commen:lal-gntatw tftan 1-acre. Any development other than heavy industry or residential. Examples: hospitals;
laboratories and other medical facilities; educational institutions; recreational facilities; municipal facilities; commercial
nurseries; multi-apartment buildings; car wash facilities; mini-malls and other business complexes; shopping malls;
hotels; office bulldi · blic warehouses; automotive dealershi s; airfields· and other li ht industrial facilities.
3. Heavv lpdustrl!lllndusfrv-gntatw tiBJ 1 aav. Examples: manufacturing plants, food processing plants, metal
working facilities, printing plants, and fleet storage areas (bus, truck, etc.).
4. Automotive repair shop. A facility categorized in any one of standard Industrial Classification (SIC) codes 5013,
5014, 5541, 7532-7534, and 7536-7539
5. Restaurants· Any facility that sells prepared foods and drinks for consumption, including stationary lunch counters
and refreshment stands selling prepared foods and drinks for immediate consumption (SIC code 5812), where the
land area for development is greater than 5,000 square feet. Restaurants where land development is less than 5,000
square feet shall meet all SUSMP requirements except for structural treatment BMP and numeric sizing criteria
YES NO
re uirements and dromodification re irem:.:..:e.::.:n.:..:.ts:::.· ____________________ _._ __ .,L_ _ __J
E-34 Page 1 of3 REV 1/14111
•
•
•
6.
7.
8.
9.
10.
11.
12.
~~· ~ CITY OF
CARLSBAD
STORM WATER
STANDARDS
QUESTIONNAIRE
E-34
Development Services
Land Development Engineering
1635 Faraday Avenue
700-602-2750
www.carlsbadca.gov
Hillside development Any development that creates more than 5,000 square feet of impervious surface and is v located in an area with known erosive soil conditions, where the development wiH grade on any natural slope that is
twenty-five percent (25'16) or greater.
Env~lv Senslllve At!a IESA( All development located within or directly adjacent2 to or discharging / directly to an ESA (where discharges from the development or redevelopment will enter receMng waters within the
ESA), which either creates 2,500 square feet or more of impervious surface on a proposed project site or increases
the area of imperviousness of a proPosed project site 1 0'16 or more of its naturally occurring condition.
Parldnq lot. Area of 5,000 square feet or more, or with 15 or more parking spaces, and potentially exposed to urban v runoff
Stnlets, roads. hlpl!w!p. and livewap. Any paved surface that is 5,000 square feet or greater used for the v transportation of automobiles, trucks, motorcycles, and other vehicles /
Retail Gasoline Outlets, Serving more than 100 vehicles per day and greater than 5,000 square feet v
Coutall?!tl!lopmenl Zope. Any project located within 200 feet of the Pacific Ocean and (1) creates more than v 2500 square feet of impervious surface or (2) increases impervious surface on property by more than 1 0'16.
Mop than 1-acl& of disturbance. Project results in the disturbance of 1-acre or more of land and is considered a
Pollutant-generating Development Project4 • v
.. . . 1 ErMronmentally Sensitive Areas Include but are not limited to all Clean Water Ad Section 303(d) 1mpa1red water bodieS, areas designated as Areas of Special
Biological Significance by the State water Resouroes 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 Resouroes 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; and any other equivalent
environmentally sensitive areas which have been identified by the Copermittees.
2 "Directly adjacent" means situated within 200 feet of the Environmentally Sensitive Area.
3 "Discharging diredly to" means ouUiow from a drainage conveyance system that is composed entirely of flows from the subject development or redevelopment site, and
not commingled with flow from adjacent lands .
4 Pollutant-generating Development Projects are those projects that generate pollutants at levels greater than background levels. In general, these include all projects
that contribute to an exoeedance to an impaired water body or which create new impervious surfaces greater than 5000 square feet and/or introduce new landscaping
areas that require routine use of fertilizers and pesticides. In most cases linear pathway projects that are for infrequent vehicle use, such as emergency or maintenance
access, or for pedestrian or bicycle use, are not considered Pollutant-generating Development Projects if they are buiH with pervious surfaces or if they sheet flow to
surrounding pervious surfaces.
INSTRUCTIONS:
Section 1 Re&u!ts:
If you an&Wered YES to ANY of the questions above, your project is subject to Priority Development Project reqLiremenls. Skip Section 2 and
please proceed to Section 3. Check the "meets PRIORITY DEVELOPMENT PROJECT requirements" box in Section 3. Additional storm water
requiremen18 will apply per the SUSMP.
If you an&Wered NO to ALL of the questions above, then please proceed to Section 2 and follow the instructions .
E-34 Page 2 of3 REV 1/14111
• ATTACHMENT "B"
•
•
SECTION 2: IDENTIFY POLLUTANTS. BMP SIZING AND SELECTION •
•
FIGURE 2-1. HMP .A,pplicabilinr Determination*
I *refc:r to expanded I-IMP exemption criteria below for justi6cations xequired on each node
• 30 City of Carlsbad SUSMP-.January 14, 2011
• ATTACHMENT "C"
•
•
•
I .·· ·--------·-··· ...
I ' /
•
N M'H'II• IE 114,41'
I ,~, 1 ~.~ .~. :..·~1.:-c:(Y.,:.
I
---· ... L ...... ·-·-·· .. . ---___ ,._ .. -------------------------·
I
2SSO
5 boo
lZ5
1)~~-l
IMt. • ZS'!O t>
~_,..,..... ~'$, bQ6IOI
•