HomeMy WebLinkAboutSDP 08-01; Blue Condominiums; Site Development Plan (SDP) (4)civil engineerins
structural design
and surveying
WATER QUALITY TECHNICAL REPORT
m
iif
4
MS 08-01: BLUE MINOR SUBDIVISION
For:
#07-071
Barry J. Blue and May T. Blue
Trustees ofthe Blue Family Trust
2950 Ocean Street
Carlsbad, CA 92008
RECEIVED
JAN 0 7 2009
PUNNING DEPT
REVISION 2: October 29, 2008
REVISION 1: June 23, 2008
ORIGINAL DATE: November 13, 2007
27315 Valley Center Road • Valley Center, CA 92082 • (760) 749-8722 • Fax (760) 749-9412
Email: wynneng@wynnengineering.com • Los Angeles (310) 306-9728 • Fax (310) 306-2129
^ WA TER QUALITY TECHNICAL REPORT
^ MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
m TABLE OF CONTENTS
ITEM PAGE
TITLE SHEET /
TABLE OF CONTENTS //
1.0 OBJECTIVE 1
. 2.0 INTRODUCTION 1
2.1 PROJECT SITE. 1
2.2 VICINITY MAP 1
2.3 STANDARDS 2
2.4 ABBREVIATIONS 2
2.5 BACKGROUND FROM CITY OF CARLSBAD STANDARDS 2
2.6 LEGAL FRAMEWORK PER CITY OF CARLSBAD STANDARDS 4
3.0 PROJECT REVIEW AND PERMITTING PROCESS 4
3.1 STEP 1: DETERMINE APPLICABLE PERMANENT STORM
WA TER BMP REQUIREMENTS 5
3.2 STEP 2: PREPARE AND SUBMIT APPROPRIATE PLANS 5
3.3 STEP 3: DETERMINE ADEQUACY OF PROPOSED PLANS 6
3.4 STEP 4: ASSURE IMPLEMENT A TION AND MAINTENANCE OF
REQUIREMENTS 6
4.0 PERMANENT BEST MANAGEMENT PRACTICES SELECTION
PROCEDURE 6
4.1 IDENTIFY POLLUTANTS FROM THE PROJECT AREA 6
4.1.1 SEDIMENT 7
4.12 NUTRIENTS 7
4.1.3 OXYGEN-DEMANDING SUBSTANCES 7
4.1.4 BACTERIA AND VIRUSES 8
4.2 ADDITIONAL ANALYSIS NOT REQUIRED FOR STANDARD
« PROJECTS 8
4.2.1 IDENTIFY RECEIVING WATERS 8
4.2.2 CHECK 303(d) LIST. 8
- 4.2.3 IDENTIFY POLLUTANTS OF CONCERN 9
4.2.4 BENEFICIAL USES OF RECEIVING WA TERS 9
^ 4.2.4.1 MUNICIPAL AND DOMESTIC SUPPLY (MUN) 9
m 4.2.4.2 AGRICULTURAL SUPPLY (AGR) 9
4.2.4.3 INDUSTRIAL SERVICE SUPPLY (IND) 9
^ 4.2.4.4 WATER CONTACT RECREATION (REC-1)... 10
m 4.2.4.5 NON-CONTACT WATER RECREATION
(REC-2) 10
^ 4.2.4.6 WARM FRESHWATER HABITAT (WARM) 10
M 4.2.4.7 ESTUARINE HABITAT (EST) 10
4.2.4.8 MARINE HABITA T (MAR) 10
Revision 2: October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 - ii - Original: November 2,2007
WATER QUAUTY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
TABLE OF CONTENTS
ITEM PAGE
4.2.4.9 WILDLIFE HABITAT (WILD) 10
4.2.4.10 PRESERVATION OF BIOLOGICAL
HABITATS (BIOL) 11
4.2.4.11 RARE, THREATENED OR ENDANGERED
SPECIES (RARE) 11
4.2.5 DRAINAGE STUDY SUMMARY. 11
5.0 LID SITE DESIGN BMPS 11
5.1 MAINTAIN PRE-DEVELOPMENT RAINFALL RUNOFF
CHARACTERISTICS 11
5.1.1 BMP-1: MINIMIZE IMPERVIOUS FOOTPRINT. 12
5.1.2 BMP-2: CONSERVE NATURAL AREAS 12
5.1.3 BMP-3: MINIMIZE DiRECTL Y CONNECTED IMPERVIOUS
AREAS 13
5.1.4 BMP-4: MAXIMIZE CANOPY INTERCEPTION AND
WA TER CONSERVA TION 13
5.2 PROTECT SLOPES AND CHANNELS 13
5.2.1 BMP-5: CONVEY RUNOFF SAFEL Y FROM THE TOPS OF
SLOPES 13
5.2.2 BMP-6: VEGETA TE SLOPES WITH NA TIVE OR
DROUGHT TOLERANT VEGETA TION 14
5.2.3 BMP-7: STABILIZE PERMANENT CHANNEL CROSSINGS 14
5.2.4 BMP-8: INSTALL ENERGY DISSIPATERS 14
5.2.5 BMP-9: MINIMIZE DISTURBANCE TO NA TURAL
DRAINAGES 14
6.0 SOURCE CONTROL BMPS 14
6.1 BMP-10: DESIGN OUTDOOR MATERIAL STORAGE AREAS TO
REDUCE POLLUTANT INTRODUCTION 74
6.2 BMP-11: DESIGN TRASH STORAGE AREAS TO REDUCE
POLLUTANT INTRODUCTION 14
6.3 EMPLOY INTEGRATED PEST MANAGEMENT PRINCIPLES 15
6.3.1 BMP-12: ELIMINATE/REDUCE PESTICIDE USE 15
6.3.2 BMP-13: DISTRIBUTE IPM EDUCATIONAL MATERIALS... 15
6.4 USE EFFICIENT IRRIGATION SYSTEMS AND LANDSCAPE
DESIGN 16
6.4.1 BMP-14: EMPLOY RAIN SHUTOFF DEVICES 16
6.4.2 BMP-15: DESIGN I RRI GA TION FOR SPECIFIC WA TER
NEEDS 16
6.4.3 BMP-16: EMPLOY FLOW REDUCERS AND SHUTOFF
VALVES 16
Revision 2: October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 - iii - Original: November 2,2007
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
TABLE OF CONTENTS
ITEM PAGE
6.5 PROVIDE STORMWATER CONVEYANCE SYSTEM STENCILING
AND SIGNAGE 16
6.5.1 BMP-17: PROVIDE CONCRETE STAMPING 17
6.5.2 BMP-18: POST SIGNS 17
7.0 ADDITIONAL BMPS USED 17
BMP-20: RESIDENTIAL DRIVEWA YS 17
8.0 TREA TMENT CONTROL BMPS 78
8.7 POLLUTANT REMOVAL EFFICIENCIES 78
8.2 DETENTION BASIN DESIGN INFORMA TION 78
9.0 OPERA TION AND MAINTENANCE PLAN 78
9.7 PERMANENT BMP MAINTENANCE A GREEMENT
REQUIREMENTS 79
9.2 OPERA TION AND MAINTENANCE PLAN 79
70.0 SUMMARY. 79
77.0 CONCLUSION 79
72.0 ATTACHMENTS 20
72.7 ATTACHMENT 1: CITY STANDARDS EXCERPTS 20
72.2 ATTACHMENT2: STORM WATER STANDARDS 20
QUESTIONNAIRE
72.3 ATTACHMENT 3: BMP EXHIBITS 20
72.4 ATTACHMENT 4: BEST MANAGEMENT PRACTICES DATA 20
7 2.5 A TTA CHMENT 5: OPERA TIONS & MAINTENANCE PLAN 20
72.6 ATTACHMENT 6: FISCALLY RESPONSIBLE DATA 20
72.7 ATTACHMENT 7: HYDROLOGY REPORT SUMMARY. 27
72.8 ATTACHMENT8: ENGINEER'S CERTIFICATION 27
Revision 2; October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 - iv - Original: November 2,2007
I
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITY OF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
1.0 OBJECTIVE
The objective of this Water Quality Technical report is to ascertain what stornn water
quality issues exist for MS 08-01: Blue Minor Subdivision and how they will be
addressed. This report is written to the standards set forth in the City of Carlsbad
Engineering Standards - Volume 4: Storm Water Standards Manual (2004 Edition, rev
3/24/08 and 6/4/08). Certain portions ofthis report are taken directly from the standards
document for reference. Additional best management sources are also referenced as
well.
2.0 INTRODUCTION
2.1 PROJECT SITE
MS 08-01: Blue Minor Subdivision site is located at 150/152 Cherry Avenue in
the City of Carlsbad, California. The site is 6,600 square feet or approximately
0.15 acres. Currently the site is a single-family residence with an out building.
The proposed design will create two multi-story condominiums with underground
parking.
2.2 VICINITY MAP
The project site can be specifically located as follows:
XT.-VICINITY MAP
SITE X ,>^" % "''^
Revision 2: October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 - 1 - Original: November 13, 2007
WA TER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
2.3 STANDARDS
This report is written to the standards set forth in the City of Carlsbad
• Engineering Standards - Volume 4: Storm Water Standards Manual (2004
^ Edition, rev 3/24/08 and 6/4/08). This will be referred to as the 'Standards'
throughout this report.
^ 2.4 ABBREVIATIONS
The following abbreviations are utilized throughout this report:
wn BMP = Best Management Practice
^ CASQA = California Stormwater Quality Association
City = City of Carlsbad
County = County of San Diego
^ CWA = Clean Water Act
LID = Low Impact Design
^ NPDES = National Pollutant Discharge
Elimination System
*" MEP = Maximum Extent Practical
^ O&M = Operation and Maintenance
SUSMP = Standard Urban Storm Water Mitigation Plan
* SWRCB = State Water Resources Control Boars
_ WQTR = Water Quality Technical Report
2.5 BACKGROUND FROM CITY OF CARLSBAD STANDARDS
Urban runoff discharged from municipal storm water conveyance systems
(drainage channels and storm drains) has been identified by local, regional, and
national research programs as one ofthe principal causes of water pollution in
most urban areas. The City of Carlsbad's storm water conveyance system, which
collects runoff from our streets, rooftops, driveways, parking lots, and other
I* impervious areas, flows to our lagoons and beaches without being treated (our
storm water conveyance system is separate from our sanitary sewer system).
Urban runoff potentially contains a host of pollutants like trash and debris,
m bacteria and viruses, oil and grease, sediments, nutrients, metals, and toxic
chemicals. These contaminants can adversely affect receiving and coastal
*• waters, associated wildlife, and public health. Urban runoff pollution is not only a
M problem during rainy seasons, but also year-round due to many types of urban
water use that discharge runoff (dry weather flow) to the storm water conveyance
^ system.
Revision 2: October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 • 2 • Original: November 13,2007
WA TER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
m Land development and construction activities significantly alter drainage patterns
and contribute pollutants to urban runoff primarily through erosion and removal or
change of existing natural vegetation during construction, and the creation of new
^ impervious surfaces, such as parking lots, which often permanently contribute
pollutants throughout the "use" ofthe project site. When homes, work places,
^ recreational areas, roads, parking lots, and structures are built, new impervious
^ areas are built- creating the potential for an impact to water quality. The natural
landscape's ability to infiltrate and cleanse storm water and urban runoff is
m, "capped" by the impervious surfaces. As impervious surfaces increase, water
that normally would have percolated into the soil now flows over the land surface
directly to downstream wetlands, creeks, and eventually the Pacific Ocean.
Accordingly, increases in impervious cover can increase the frequency and
intensity of storm water flows. Second, new impervious surfaces often become a
source of pollutants associated with development, such as automotive fluids,
cleaning solvents, toxic or hazardous chemicals, detergents, sediment, metals,
pesticides, oil and grease, and food wastes. These pollutants, which are often
temporarily captured on impervious surfaces, are transported to the storm water
conveyance system by storm water and urban runoff. The pollutants flow
untreated through the storm water conveyance system and ultimately into our
creeks, rivers, beaches, and ocean. With the growing concerns of urban runoff
and storm water pollution, local, state, and federal agencies devised regulations
requiring development planning and construction controls to treat storm water-
related pollution from new development projects before it reaches any receiving
waters.
Order R9-2007-0001 (Municipal Permit) was issued on January 24, 2007 to the
City of Carlsbad, the County of San Diego, the San Diego Unified Port District,
the San Diego Regional Airport Authority, and 17 other cities within the region
administered by the San Diego Regional Water Quality Control Board (Regional
Board). The Municipal Permit addresses the implementation of storm water
regulations for private and public development projects. Specifically,
development projects are required to include storm water best management
practices (BMPs) both during construction, and in the projects permanent design,
to reduce pollutants discharged from the project site to the maximum extent
practicable.
•m
Revision 2: October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 - 3 - Original: November 13,2007
m
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
The primary objectives of the City of Carlsbad Best Management Practices
Manual Part II requirements are to:
1. Effectively prohibit non-storm water discharges.
2. Reduce the discharge of pollutants from storm water conveyance systems to
the Maximum Extent Practicable (MEP statutory standard) throughout the use
of a developed site.
To address pollutants that may be generated from new development once the
site is in use, the Municipal Permit further requires that the City implement a
series of permanent BMPs described in a document called the Model Standard
Urban Storm Water Mitigation Plan, or Model SUSMP (pronounced suesump"),
which was approved bythe Regional Board on June 12, 2002.
2.6 LEGAL FRAMEWORK PER CITY OF CARLSBAD STANDARDS
The requirement to implement storm water BMP's into development projects
^ originates from Section 402 (p) of the Federal Clean Water Act. The Federal
Clean Water Act amendments of 1987 established a framework for regulating
storm water discharges from municipal, industrial, and construction activities
^ under the National Pollution Discharge Elimination System (NPDES) program.
Under the Federal Clean Water Act, municipalities throughout the nation are
* issued a Municipal NPDES Permits. The primary goal of a Municipal NPDES
Permit is to stop polluted discharges from entering the storm water conveyance
system and local receiving and coastal waters.
m
In California, the State Water Resources Control Board (SWRCB), through the
^ nine Regional Boards, administers the NPDES storm water municipal permitting
« program. Based on the Municipal Permit issued by the San Diego Regional
Board, the City is required to develop and implement permanent storm water
BMPs to eliminate and/or reduce pollution from new development projects to the
M MEP.
3.0 PROJECT REVIEW AND PERMITTING PROCESS
lil The City of Carlsbad's Storm Water Management and Discharge Control Ordinance
(Carlsbad Municipal Code Chapter 15.12), requires that all new development and
^ redevelopment activities comply with the storm water pollution prevention requirements.
il These storm water pollution prevention requirements, which are described in detail in
Chapter 2.3, "Permanent Storm Water Best Management Practices Selection
* Procedure," are site specific and vary based on the project's potential impact on
^ receiving water quality.
Revision 2: October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 - 4 • Original: November 13,2007
WA TER QUALITY TECHNICAL REPORT
m MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
m The steps below describe the elements of the plan review and permitting processes for
storm water best management practice (BMP) requirements. The flow chart in Figure 1,
"Review Process for Discretionary Actions" demonstrates how storm water
M requirements are incorporated into projects requiring subdivision approvals,
development permits or other discretionary actions.
m
^ For projects that do not require discretionary action. City staff will require that all
appropriate SUSMP requirements are incorporated into the project design and shown
m on the plans prior to issuance of any ministerial permit.
The process for issuance of ministerial projects includes (1) receipt of an application, (2)
m determination of application completeness, (3) staff review of application, including
appropriate storm water requirements and (4) issuance of a ministerial permit. The
applicants are required to complete a "Standard Urban Storm Water Mitigation Plan
Questionnaire" (Appendix A) as a part of their project submittal to determine the level of
storm water requirements, including SUSMP requirements that will be a part of the
project design and shown on the plans.
3.1 STEP 1: DETERMINE APPLICABLE PERMANENT STORM WATER
BMP REQUIREMENTS
Prior to submittal, applicants must complete the "Storm Water Standards
Questionnaire" from Appendix A of the Standards. The completed Questionnaire
for MS 08-01: Blue Minor Subdivision is included in Attachment 2 for reference.
Based on the project's questionnaire MS 08-01: Blue Minor Subdivision is only
required to perform to 'Standards Project Requirements' as defined in the
Standards.
m
m
Since MS 08-01: Blue Minor Subdivision is only subject to standard permanent
storm water requirements the design must incorporate the LID Site Design and
Source Control requirements as identified in Chapters 2.3.3.1 and 2.3.3.2 and
Table 1 ofthe Standards. Table 1 ofthe Standards is included in Attachment 1
for reference. As such, the project site must incorporate LID Site Design BMPs
and Source Control BMPs that are applicable to the project.
il 3.2 STEP 2: PREPARE AND SUBMIT APPROPRIATE PLANS
MS 08-01: Blue Minor Subdivision is only required to provide applicable BMPs
* per Step 1 of the Standards. Since the project is only subject to standard
m permanent BMP requirements and will only need to complete the "Identify
Pollutants from the Project Area" procedure (Standards Chapter 2.3.2.1), and
then incorporate the requirements in Chapter 2.3.3.1, "LID Site Design BMPs"
m and Chapter 2.3.3.2, "Source Control BMPs" of the Standards. The project site
will incorporate all necessary permanent BMPs into the project plans prior to
submittal, regardless of the project type. Analysis of the project's anticipated
m pollutants of concern is included later in this report.
* Revision 2: October 29, 2008
m Revision 1: June 23, 2008
WEI 07-071 - 5 - Original: November 13,2007
WA TER QUALITY TECHNICAL REPORT
m MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
3.3 STEP 3: DETERMINE ADEQUACY OF PROPOSED PLANS
Under the authority of the City Engineer, staff will review this reported for
compliance with the applicable storm water requirements contained in this plan.
m The City Engineer may approve proposed alternatives to the BMP requirements
in this plan if they are determined to be applicable and equally effective.
Additional analysis or information may be required to enable staff to determine
^ the adequacy of proposed BMPs, and will be requested through a project issues
report following the conclusion of a staff review cycle. After all storm water
m requirements have been approved by the City Engineer, proceed to Step 4 of the
0 Standards to assure implementation and maintenance of the approved BMPs
through permit conditions, plan notes, and maintenance agreements.
3.4 STEP 4: ASSURE IMPLEMENTATION AND MAINTENANCE OF
REQUIREMENTS
MS 08-01: Blue Minor Subdivision will provide assurances that permanent storm
water BMPs will be constructed and permanently maintained throughout the use
of a developed site. The summary below describes how permanent BMP
requirements must be assured during both discretionary approval processes.
After the City Engineer has approved all permanent BMPs, refer to Chapter 4 of
the Standards, "Implementation & Maintenance Requirements" ofthe Standards
to determine how permanent BMP implementation and maintenance will be
assured. Operations and Maintenance Data is detailed below and provided for
reference in Attachment 5. Fiscal Responsibility is detailed below and provided
_. for reference in Attachment 6.
* 4.0 PERMANENT BEST MANAGEMENT PRACTICES SELECTION PROCEDURE
^ The following process should be used to determine the permanent BMPs for MS 08-01:
Blue Minor Subdivision:
4.1 IDENTIFY POLLUTANTS FROM THE PROJECT AREA
Using Table 2 of the Standards (provided in Attachment 1 for reference) the
Anticipated and Potential Pollutants of Generated by Land Use Type for MS 08-
01: Blue Minor Subdivision are not listed because the project does not meet the
criteria for any of these categories as defined in the Standards; however, the
* project most closely resembles the Land Sue Type of Attached Residential
Development. As such, the following general pollutant categories may need to
^ be addressed:
m
Anticipated Pollutants of Concern:
^ Sediment
^ Nutrients
t, Trash & Debris
^ Pesticides
Revision 2; October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 - 6 - Original: November 13,2007
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITY OF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
Potential Pollutants of Concern
(D Oxygen Demanding Substances
(D Oil & Grease
® Bacteria & Viruses
However, due to the size of the project site (0.15 acres) and the fact that the
existing and proposed conditions already contain a high imperviousness, the
following pollutants will most likely not be present on the project site:
4.1.1 SEDIMENT
Sediment as defined in Appendix F of the Standards will not be present on
the project site because there are no overland, natural, or highly vegetated
areas for project site runoff to come into contact, let alone flow through to
pick-up sediment pollutants. The majority of the project site sheet flows
from the roof and driveway to the proposed catch basins and eventually to
the proposed detention (retarding) basin.
4.1.2 NUTRIENTS
Nutrients are typically defined as 'inorganic substances, such as nitrogen
and phosphorus. They commonly exist in the form of mineral salts that are
either dissolved or suspended in water. Primary sources of nutrients in
urban runoff are fertilizers and eroded soil' (City of San Diego Storm
Water Standards, May 2003). With this definition Nutrients will not be
^ present on the project site because there are no overland, natural, or
highly vegetated areas for project site runoff to come into contact, let
alone flow through to pick-up nutrient pollutants. The majority of the
project site sheet flows from the roof and driveway to the proposed catch
basins and eventually to the proposed detention (retarding) basin.
il
4.1.3 OXYGEN-DEMANDING SUBSTANCES
Oxygen-Demanding Substances are typically defined as 'biodegradable
* organic material as weli as chemicals that react with dissolved oxygen in
water to form other compounds. Proteins, carbohydrates, and fats are
examples of biodegradable organic compounds. Compounds such as
ammonia and hydrogen sulfide are examples of oxygen-demanding
compounds' (City of San Diego Storm Water Standards, May 2003). With
this definition Oxygen-Demanding Substances will not be present on the
M project site because there are no overland, natural, or highly vegetated
areas for project site runoff to come into contact, let alone flow through to
^ pick-up oxygen-demanding pollutants or stressors.
m
m
^ Revision 2: October 29, 2008
M Revision 1: June 23, 2008
WEI 07-071 - 7 - Original: November 13,2007
WA TER QUALITY TECHNICAL REPORT
m MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
••II
M 4.1.4 BACTERIA AND VIRUSES
Bacteria and Viruses are typically defined as 'ubiquitous microorganisms
that thrive under certain environmental conditions. Their proliferation is
M typically caused by the transport of animal or human fecal wastes from the
watershed. Water, containing excessive bacteria and viruses can alter the
^ aquatic habitat and create a harmful environment for humans and aquatic
life. Also, the decomposition of excess organic waste causes increased
growth of undesirable organisms in the water'(City of San Diego Storm
m Water Standards, May 2003). With this definition Bacteria and Viruses
^ will not be present on the project site because there are no vegetated
areas for animals to deposit fecal manner on it and there is a proposed
<m gate to keep random individuals from depositing human waste on the
^ project site.
m With all of this said, the following are the remaining potential and anticipated
^ pollutants of concern for the project site that will need to be mitigated:
^ Anticipated Pollutants of Concern:
^ Trash & Debris
^ Pesticides
m
Potential Pollutants of Concern
® Oil & Grease
^ 4.2 ADDITIONAL ANALYSIS NOT REQUIRED FOR STANDARD
* PROJECTS
^ Although MS 08-01: Blue Minor Subdivision is not a priority projects, the following
^ additional analysis was conducted pertaining to the receiving water for reference:
4.2.1 IDENTIFY RECEIVING WATERS
MS 08-01: Blue Minor Subdivision is situated in 904.21 per the San Diego
Regional Water Quality Control Board Basin Plan Map. This is the
Carlsbad Hydrologic Unit, Buena Vista Creek Hydrologic Areas, and El
Salto Hydrologic Sub Area. The ultimate receiving waters of El Salta HSA
storm water runoff is the Buena Vista Lagoon or the Pacific Ocean
Shoreline. Site runoff from the project discharges to the curb & gutter of
Cherry Avenue and travels to the Pacific Ocean Shoreline along Carlsbad
Boulevard.
4.2.2 CHECK 303(d) LIST
According to the CWA Section 303(d) List of Water Quality Limited
Segments the Buena Vista Creek, Buena Vista Lagoon, and the Pacific
Ocean Shoreline at the Buena Vista Creek HA are listed as impaired
m receiving waters. A copy of the CWA Section 303(d) List is provided for
reference in Attachment 1.
* Revision 2: October 29, 2008
m Revision 1: June 23, 2008
WEI 07-071 - 8 - Original: November 13,2007
•m
• WA TER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
^ 4.2.3 IDENTIFY POLLUTANTS OF CONCERN
The CWA Section 303(d) List of Water Quality Limited Segments lists the
impairments as follows:
m
Buena Vista Creek:
^ Sediment Toxicity
M
Buena Vista Lagoon
'm Indicator Bacteria
^ ^ Nutrients
i Sedimentation/Siltation
^ Pacific Ocean Shoreline at the Buena Vista Creek HA
^ Indicator Bacteria
m
^ A copy of the 2006 CWA Section 303(d) List of Water Quality Limited
Segments requiring TMDLs is provided for reference in Attachment 1.
^ 4.2.4 BENEFICIAL USES OF RECEIVING WATERS
In 1972, the State of California adopted a uniform list and description of
mi beneficial uses to be applied throughout all basins in the State of
^ California. The beneficial uses as defined in the San Diego Regional
Basin Plan associated with the project's three receiving waters are as
follows:
m
m
m
4.2.4.1 MUNICIPAL AND DOMESTIC SUPPLY (MUN)
This beneficial use consists of uses of water for community,
military, or individual water supply systems including, but not limited
to, drinking water supply.
4.2.4.2 AGRICULTURAL SUPPLY (AGR)
This beneficial use consists of uses of water for farming,
horticulture, or ranching including, but not limited to, irrigation, stock
watering, or support of vegetation for range grazing.
4.2.4.3 INDUSTRIAL SERVICE SUPPLY (IND)
This beneficial use consists of uses of water for industrial activities
that do not depend primarily on water quality including, but not
limited to, mining, cooling water supply, hydraulic conveyance,
gravel washing, fire protection, or oil well re-pressurization.
^ Revision 2: October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 - 9 - Original: November 13,2007
WA TER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
4.2.4.4 WATER CONTACT RECREATION (REC-1)
This beneficial use consists of uses of water for recreational
activities involving body contact with water, where ingestion of
^ water is reasonably possible. These uses include, but are not
limited to, swimming, wading, water-skiing, skin and scuba diving,
"~- surfing, white water activities, fishing, or use of natural hot springs.
4.2.4.5 NON-CONTACT WATER RECREATION (REC-2)
« This beneficial use consists of uses of water for recreational
^ activities involving proximity to water, but not normally involving
body contact with water, where ingestion of water is reasonably
m possible. These uses indude, but are not limited to, picnicking,
^ sunbathing, hiking, beachcombing, camping, boating, tide pool and
marine life study, hunting, sightseeing, or aesthetic enjoyment in
m conjunction with the above activities.
• 4.2.4.6 WARM FRESHWATER HABITAT (WARM)
^ This beneficial use consists of uses of water that support warm
water ecosystems including, but not limited to, preservation or
*" enhancement of aquatic habitats, vegetation, fish, or wildlife,
^ including invertebrates.
• 4.2.4.7 ESTUARINE HABITAT (EST)
^ This beneficial use consists of uses of water that support estuarine
ecosystems including, but not limited to, preservation or
** enhancement of estuarine habitats, vegetation, fish, shellfish, or
^ wildlife (e.g., estuarine mammals, waterfowl, shorebirds).
» 4.2.4.8 MARINE HABITAT (MAR)
This beneficial use consists of uses of water that support terrestrial
"* ecosystems including, but not limited to, preservation or
* enhancement of marine habitats, vegetation such as kelp, fish,
shellfish, or wildlife (e.g., marine mammals, shorebirds).
m 4.2.4.9 WILDLIFE HABITAT (WILD)
This beneficial use consists of uses of water that support terrestrial
ecosystems including, but not limited to, preservation and
m enhancement of terrestrial habitats, vegetation, wildlife (e.g.,
mammals, birds, reptiles, amphibians, invertebrates), or wildlife
water and food sources.
^ Revision 2: October 29, 2008
S Revision 1: June 23, 2008
WEI 07-071 -10 - Original: November 13,2007
41
WA TER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
4.2.4.10 PRESERVATION OF BIOLOGICAL HABITATS
(BIOL)
This beneficial use consists of uses of water that support
^ designated areas or habitats, such as Areas of Special Biological
Significance (ASBS), established refuges, parks, sanctuaries,
ecological reserves, or other areas where the preservation or
^ enhancement of natural resources requires special protection.
4.2.4.11 RARE, THREATENED OR ENDANGERED
SPECIES (RARE)
This beneficial use consists of uses of water that supports habitats
— necessary, at least in part, for the survival and successful
maintenance of plant or animal species established under state or
*" federal law as rare, threatened, or endangered.
4.2.5 DRAINAGE STUDY SUMMARY
A Drainage Study has been completed and submitted for the project site
^ as a separate document. A copy of relevant data from the hydrology
study has been included for reference in Attachment 7.
^ 5.0 LID SITE DESIGN BMPS
Per the Standards, MS 08-01: Blue Minor Subdivision shall be designed so as to
* minimize directly connected impervious surfaces and to promote infiltration using LID
techniques where feasible. Projects shall, to the maximum extent practicable, minimize
the introduction of pollutants and conditions of concern that may result in significant
impacts, generated from site runoff to the storm water conveyance system. Projects
shall also control post-development peak storm water runoff discharge rates and
* velocities to maintain or reduce pre-development downstream erosion and to protect
stream habitat. Projects can address these objectives through the creation of a
hydrologically functional project design that attempts to mimic the natural hydrologic
* regime.
The following is a suite of LID Site Design BMPs from the Standards that should be
implemented as appropriate to achieve SUSMP goals and requirements per the
ii Standards to the maximum extent practical:
m 5.1 MAINTAIN PRE-DEVELOPMENT RAINFALL RUNOFF
ti CHARACTERISTICS
This Site Design BMP entails controlling post-development peak storm water
m runoff discharge rates and velocities to maintain or reduce pre-development
Ji downstream erosion by applying the following concepts:
Revision 2: October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 -11 - Original: November 13, 2007
WA TER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
5.1.1 BMP-1: MINIMIZE IMPERVIOUS FOOTPRINT
This LID and Site Design BMP entails minimizing the project impervious
surface by using the following design elements:
^ 1. Increase building density (number of stories above or below
ground)
•* 2. Construct walkways, trails, patios, overflow parking lots and alleys
^ and other low-traffic areas with permeable surfaces, such as
pervious concrete, porous asphalt, unit pavers, and granular
•I materials
^ 3. Construct streets, sidewalks and parking lot aisles to the minimum
widths necessary, provided that public safety and a walkable
mm environment for pedestrians are not compromised; and
4. Minimize the use of impervious surfaces, such as decorative
concrete, in the landscape design.
In order to help attain the storm water quality goals set forth in this LID
and Site Design BMP the project site proposes to build multi-story
^ condominium units, design the driveway and walking areas to the
minimum standards required, and to utilize CASQA BMP Fact Sheet SD-
10: Site Design & Landscape Planning for guidance in landscape design.
^ A copy of this CASQA BMP Fact Sheets is provided for reference in
Attachment 4. This BMP is also noted on the BMP Exhibit provided in
* Attachment 3.
^ 5.1.2 BMP-2: CONSERVE NATURAL AREAS
This LID and Site Design BMP does not apply to MS 08-01: Blue Minor
Subdivision because there are no natural areas to conserve on the project
site in its existing or proposed condition.
This space intentionally left blank.
Revision 2: October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 -12 - Original: November 13, 2007
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
5.1.3 BMP-3: MINIMIZE DIRECTLY CONNECTED IMPERVIOUS
AREAS
This LID and Site Design BMP entails the practice of Minimizing Directly
Connected Impervious Areas. This can be done through the following
design elements:
L Where landscaping is proposed, drain rooftops into adjacent
landscaping prior to discharging to the storm water conveyance
system.
2. Where landscaping is proposed, drain impervious parking lots,
sidewalks, walkways, trails, and patios into adjacent landscaping.
In order to help attain the storm water quality goals set forth in this LID
and Site Design BMP sidewalk and patios will drain to landscaping areas
prior to the ultimate discharge point. CASQA BMP Fact Sheet SD-11:
Roof Runoff Controls will be utilized for guidance in designing the project
site. A copy of this CASQA BMP Fact Sheet is provided for reference in
Attachment 4. This BMP is also noted on the BMP Exhibit provided in
Attachment 3.
5.1.4 BMP-4: MAXIMIZE CANOPY INTERCEPTION AND WATER
CONSERVATION
This LID and Site Design BMP entails the maximization of canopy
interception of runoff and water conservation. This can be done through
the following design elements:
1. Preserve existing native trees and shrubs.
2. Plant additional native or drought tolerant trees and large shrubs in
place of non-drought tolerant exotics.
In order to help attain the storm water quality goals set forth in this LID
and Site Design BMP CASQA BMP Fact Sheet SD-10: Site Design &
Landscape Planning will be utilized for guidance in landscape design to
select native, drought tolerant species in the ultimate landscaping design.
A copy ofthis CASQA BMP Fact Sheet is provided for reference in
Attachment 4. This BMP is also noted on the BMP Exhibit provided in
il Attachment 3.
5.2 PROTECT SLOPES AND CHANNELS
ii This LID and Site Design BMP entails the following concepts:
" 5.2.1 BMP-5: CONVEY RUNOFF SAFELY FROM THE TOPS OF
^ SLOPES
This LID and Site Design BMP does not apply to MS 08-01: Blue Minor
^ Subdivision because there are no slopes to protect on the project site.
d
^ Revision 2: October 29, 2008
* Revision 1: June 23, 2008
WEI 07-071 -13 - Original: November 13, 2007
4
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
5.2.2 BMP-6: VEGETATE SLOPES WITH NATIVE OR DROUGHT
TOLERANT VEGETATION
This LID and Site Design BMP does not apply to MS 08-01: Blue Minor
Subdivision because there are no slopes to vegetate on the project site.
5.2.3 BMP-7: STABILIZE PERMANENT CHANNEL CROSSINGS
This LID and Site Design BMP does not apply to MS 08-01: Blue Minor
Subdivision because there are no channels to cross on the project site.
5.2.4 BMP-8: INSTALL ENERGY DISSIPATERS
This LID and Site Design BMP does not apply to MS 08-01: Blue Minor
Subdivision because there are no discharge points that will require the use
of energy dissipation devices.
5.2.5 BMP-9: MINIMIZE DISTURBANCE TO NATURAL DRAINAGES
This LID and Site Design BMP does not apply to MS 08-01: Blue Minor
Subdivision because there are no natural drainages on the project site.
6.0 SOURCE CONTROL BMPS
The following are Source Control BMPs:
6.1 BMP-10: DESIGN OUTDOOR MATERIAL STORAGE AREAS TO
REDUCE POLLUTANT INTRODUCTION
This Source Control BMP does not apply to MS 08-01: Blue Minor Subdivision
because there are no material storage areas in the proposed design.
6.2 BMP-11: DESIGN TRASH STORAGE AREAS TO REDUCE
POLLUTANT INTRODUCTION
This Source Control BMP entails designing the trash storage areas with:
1. Paved with an impervious surface, designed not to allow run-on from
adjoining areas, and screened or walled to prevent off-site transport of
trash. Or
2. Contain attached lids on all trash containers that exclude runoff. OR
3. Contain a roof or awning to minimize direct precipitation.
In order to help attain the storm water quality goals set forth in this Source
Control BMP each unit proposed by MS 08-01: Blue Minor Subdivision will have
its trash enclosure located in its mechanical/utility room on the garage level.
These areas are completely isolated from the potential of contact with storm
water. A copy of Architectural Sheet A.2 (from the most recent plan set at time of
this report) is provided for reference in Attachment 3 for reference to illustrate the
location of the trash areas.
1
d
^ Revision 2: October 29, 2008
d Revision 1: June 23, 2008
WEI 07-071 • 14 - Original: November 13,2007
d
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
6.3 EMPLOY INTEGRATED PEST MANAGEMENT PRINCIPLES
Integrated pest management (IPM) is an ecosystem-based pollution prevention
strategy that focuses on long-term prevention of pests or their damage through a
combination of techniques such as biological control, habitat manipulation,
modification of cultural practices, and use of resistant plant varieties. Pesticides
are used only after monitoring indicates they are needed according to
established guidelines. Pest control materials are selected and applied in a
manner that minimizes risks to human health, beneficial and non-target
organisms, and the environment. More information may be obtained at the UC
Davis website at (http://www.ipm.ucdavis.edU/WATER/U/index.html).
6.3.1 BMP-12: ELIMINATE/REDUCE PESTICIDE USE
This Source Control BMP entails the elimination and/or reducing the need
for pesticide use in the project design by:
1. Plant pest-resistant or well-adapted plant varieties such as native
plants; and
2. Discourage pests by modifying the site and landscaping design.
Pollution prevention is the primary "first line of defense" because
pollutants that are never used do not have to be controlled or
treated (methods which are inherently less efficient).
In order to help attain the storm water quality goals set forth in this Source
Control BMP CASQA BMP Fact Sheet SD-10: Site Design & Landscape
Planning will be utilized for guidance in landscape design to select
appropriate pest-resistance, native, drought tolerant species in the
ultimate landscaping design. A copy of this CASQA BMP Fact Sheet is
provided for reference in Attachment 4. This BMP is also noted on the
BMP Exhibit provided in Attachment 3.
6.3.2 BMP-13: DISTRIBUTE IPM EDUCATIONAL MATERIALS
This Source Control BMP entails the development and implementation of
Integrated Pest Management (IPM) educational materials to future site
residents/tenants/owners. At a minimum, educational materials must
address the following IPM topics:
it 1. Keeping pests out of buildings and landscaping using barriers,
screens, and caulking;
^ 2. Physical pest elimination techniques, such as, weeding, squashing,
d trapping, washing, or pruning out pests;
3. Relying on natural enemies to eat pests;
4. Proper use of pesticides as a last line of defense. More information
M may be obtained at the UC Davis website at
(http://www.ipm.ucdavis.eduA/VATER/U/index.html).
m
^ In order to help attain the storm water quality goals set forth in this Source
Control BMP the owner shall be required to develop an IPM via CC&Rs.
^ Revision 2: October 29, 2008
d Revision 1: June 23, 2008
WEI 07-071 • 15 - Original: November 13,2007
d
WA TER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
6.4 USE EFFICIENT IRRIGATION SYSTEMS AND LANDSCAPE DESIGN
This Source Control BMP entails the efficient use ofthe following methods to
reduce excessive irrigation runoff:
6.4.1 BMP-14: EMPLOY RAIN SHUTOFF DEVICES
m This Source Control BMP entails the use of rain shutoff devices to prevent
^ irrigation during and after precipitation.
m In order to help attain the storm water quality goals set forth in this Source
^ Control BMP CASQA BMP Fact Sheet SD-12: Efficient Irrigation will be
utilized as a reference in designing the project's landscaping and
m irrigation. A copy of this CASQA BMP Fact Sheet is provided for
^ reference in Attachment 4. This BMP is also noted on the BMP Exhibit
provided in Attachment 3.
^ 6.4.2 BMP-15: DESIGN IRRIGATION FOR SPECIFIC WATER NEEDS
This Source Control BMP entails designing the irrigation systems to the
^ specific water needs of the project's landscaping.
In order to help attain the storm water quality goals set forth in this Source
^ Control BMP CASQA BMP Fact Sheet SD-10: Site Design & Landscape
Planning and SD-12: Efficient Irrigation will be utilized as references in
*• designing the project's landscaping and irrigation. Copies of these
^ CASQA BMP Fact Sheets are provided for reference in Attachment 4.
This BMP is also noted on the BMP Exhibit provided in Attachment 3.
m
6.4.3 BMP-16: EMPLOY FLOW REDUCERS AND SHUTOFF VALVES
This Source Control BMP entails the use of flow reducers or shutoff valves
triggered by a pressure drop to control water loss in the event of broken
^ sprinkler heads or lines.
In order to help attain the storm water quality goals set forth in this Source
Control BMP CASQA BMP Fact Sheet SD-12: Efficient Irrigation will be
^ utilized as a reference in designing the project's landscaping and
d irrigation. A copy of this CASQA BMP Fact Sheet is provided for
reference in Attachment 4. This BMP is also noted on the BMP Exhibit
^ provided in Attachment 3.
d
6.5 PROVIDE STORM WATER CONVEYANCE SYSTEM STENCILING AND
w SIGNAGE
m This Source Control BMP entails the stenciling of storm water conveyance
systems and the posting of applicable signage. This can be accomplished by
n utilizing the following:
Revision 2: October 29, 2008
d Revision 1: June 23, 2008
WEI 07-071 -16 - Original: November 13,2007
WA TER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
6.5.1 BMP-17: PROVIDE CONCRETE STAMPING
This Source Control BMP entails providing concrete stamping (or
approved equivalent) on all storm water conveyance system inlets and
» catch basins within the project area with prohibitive language (e.g., "No
Dumping - I Live in «name receiving water»"), satisfactory to the City
Engineer.
In order to help attain the storm water quality goals set forth in this Source
* Control BMP CASQA BMP Fact Sheet SD-13: Storm Drain Signs will be
^ utilized as a reference in designing the project site. A copy of this CASQA
BMP Fact Sheet is provided for reference in Attachment 4. This BMP is
m also noted on the BMP Exhibit provided in Attachment 3.
* 6.5.2 BMP-18: POST SIGNS
m. This Source Control BMP entails posting signs and prohibitive language
and/or graphical icons, which prohibit illegal dumping at public access
points along channels and creeks within the project area, trailheads, parks
^ and building entrances.
* In order to help attain the storm water quality goals set forth in this Source
, Control BMP CASQA BMP Fact Sheet SD-13: Storm Drain Signs will be
utilized as a reference in designing the project site. A copy of this CASQA
* BMP Fact Sheet is provided for reference in Attachment 4. This BMP is
^ also noted on the BMP Exhibit provided in Attachment 3.
7.0 ADDITIONAL BMPS USED
Although MS 08-01: Blue Minor Subdivision is not required to utilize BMPs other than
LID and Site Design BMPs and Source Control BMPs, the following additional BMP will
"* be utilized on the project site:
• BMP-20: RESIDENTIAL DRIVEWAYS
^ This Individual Priority Project BMP entails that Driveways shall have one of the
following design elements:
^ 1. Shared access;
d 2. Flared entrance (single lane at street)
3. Wheelstrips (paving only under tires)
^ 4. Porous paving; and/or
d 5. Be designed to drain into landscaping prior to discharging to the storm water
conveyance system.
d In order to attain the storm water quality goals set forth in this Individual Priority
Project BMP MS 08-01: Blue Minor Subdivision will utilize option 1. The
1 driveway entrance will be shared between the units and will only have one
J driveway at the street that will be designed to the minimum width allowable.
Revision 2: October 29, 2008
d Revision 1: June 23, 2008
WEI 07-071 -17- Original: November 13,2007
d
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITY OF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
M
d
d
d
d
8.0 TREATMENT CONTROL BMPS
Although not required to by the Standards, MS 08-01: Blue Minor Subdivision will
incorporate Treatment Control BMPs. MS 08-01: Blue Minor Subdivision will utilize a
detention (retarding) basin (dry pond) that will discharge to the surface in the front
landscaping. This treatment train works best for the project conditions due to all storm
drain run-off will be taken to a sump pump after the detention (retarding) basin and
having to be pumped back up to the front landscaping prior to sheet flowing to the curb
and gutter.
8.1 POLLUTANT REMOVAL EFFICIENCIES
The selected Treatment Control BMPs have various removal efficiencies for the
project's pollutants of concern. The removal efficiencies for the selected
treatment control BMPs are as follows:
Design BMP Pollutant of Concern
Feature Category
Trash & Pesticides Oil &
Debris Grease
Detention (Retarding) Basin Settling Basin
(Dry Pond) HIGH HIGH HIGH
8.2 DETENTION BASIN DESIGN INFORMATION
The Detention (Retarding) Basin has been sized per the hydrology study for MS
08-01: Blue Minor Subdivision. This is a separate document, but is part of the
overall plan file with the CityofCarlsbad. The basin has been sized to contain
the 100-Year Design Storm Event and discharge the water, via a sump pump,
back to the curb line in sufficient time as to prevent vectors from forming. The
design data for the detention (retention) basin can be found in the project's
hydrology study. Please refer to that document for more information. A brief
summary ofthe detention (retarding) basin data is as follows:
Location:
Size:
Design Volume:
Storage Volume:
Qmax at Outfall (Gutter):
Maximum Storage Time:
Driveway, Below Grade
10'X 22.5'x 5' (deep)
Qioo = 0.0230 acre-ft
Qioo = 1,125 ft^ = 0.0258 acre-ft
0.20 cfs
7.0 hours = 420 minutes
d
9.0 OPERATION AND MAINTENANCE PLAN
Although not required to, the BMPs proposed by MS 08-01: Blue Minor Subdivision
proposes the use of a treatment train of BMPs. In order for this treatment train to
effectively attain the storm water goals and requirements set by the City of Carlsbad
there must be an ongoing Operations and Maintenance (O&M) Plan.
WEI 07-071 -18-
Revision 2: October 29, 2008
Revision 1: June 23, 2008
Original: November 13, 2007
m
d
d
d
ii
d
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
9.1 PERMANENT BMP MAINTENANCE AGREEMENT REQUIREMENTS
MS 08-01: Blue Minor Subdivision proposes a maintenance agreement assuring
all permanent BMPs will be maintained throughout the "use" ofthe project site,
satisfactory to the City Engineer per Option 1 of Appendix E of the Standards. A
copy of the draft document for ensuring maintenance is included for reference in
Attachment 6.
9.2 OPERATION AND MAINTENANCE PLAN
The O&M Plan for MS 08-01: Blue Minor Subdivision site has been included as
Attachment 5. Please refer to Attachment 5 for specific information pertaining to
the O&M Plan for MS 08-01: Blue Minor Subdivision.
10.0 SUMMARY
MS 08-01: Blue Minor Subdivision project site is located in the City of Carlsbad. The
project will utilize a variety of storm water best management practices to mitigate water
quality concerns. After careful consideration and design, MS 08-01: Blue Minor
Subdivision proposes the utilization ofthe following storm water BMPs:
§ LID and Site Design BMPs
o BMP-1: Minimize Impervious Footprint
o BMP-3: Minimize Directly Connected Impervious Areas
^ Source Control BMPs
o BMP-11: Design Trash Storage Areas to Reduce Pollutant
Introduction
o BMP-12: Eliminate/Reduce Pesticide Use
o BMP-13: Distribute IPM Educational Materials
o BMP-14: Employ Rain Shutoff Devices
o BMP-15: Design Irrigation for Specific Water Needs
o Bmp-16: Employ Flow Reducers and Shutoff Valves
o BMP-17: Provide Concrete Stamping
o BMP-18: Post Signs
^ Individual Priority Project BMPs
o BMP-20: Residential Driveways
^ Treatment Control BMPs
o Detention (Retarding) Basin (Dry Pond)
11.0 CONCLUSION
Through the utilization of the above mentioned storm water best management practices
MS 08-01: Blue Minor Subdivision will not increase, add to, or create any water quality
issues on-site or off-site. As a result of the hydrology summary provided in Attachment
7 all water from the MS 08-01: Blue Minor Subdivision project site will sheet flow to the
d curb & gutter of Cherry Avenue and eventually to the Pacific Ocean Shoreline. This will
result in no impacts from the project site's storm drain runoff in the downstream
receiving waters due to the fact that all storm water runoff is being treated prior to being
d discharged. In addition, the hydrology report also quantifies a reduction in the 100-Year
Design Storm Event discharge rate as well.
^ Revision 2: October 29, 2008
Ili Revision 1: June 23, 2008
WEI 07-071 -19 - Original: November 13, 2007
m
d
m.
m.
d
m.
d
m
d
m
m
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
12.0 ATTACHMENTS
The following attachments are included for reference to this report:
12.1 ATTACHMENT 1: CITY STANDARDS EXCERPTS
This attachment includes the following City of Carlsbad Standards Excerpts
applicable to the project site:
^ Table 1: Standard Development Project & Priority Project Storm Water
BMP Requirements Matrix
£, Table 2: Anticipated and Potential Pollutants Generated by Land Use
Type
^ Table 3: Numeric Sizing Treatment Standards
^ Table 4: Structural Treatment Control BMP Selection Matrix
In addition, the following miscellaneous standards excerpts are also included:
4 Beneficial Uses Excerpt from the San Diego Region 9 Basin Plan
i Excerpt from Proposed 2006 CWA Section 303(d) List of Water Quality
Limited Segments
12.2 ATTACHMENT 2: STORM WATER STANDARDS QUESTIONNAIRE
This attachment includes the MS 08-01: Blue Minor Subdivision Storm Water
Standards Questionnaire from Appendix A of the Standards.
12.3 ATTACHMENT 3: BMP EXHIBITS
This attachment includes the MS 08-01: Blue Minor Subdivision BMP Exhibits.
12.4 ATTACHMENT 4: BEST MANAGEMENT PRACTICES DATA
This attachment includes the following BMP Fact Sheets:
^ CASQA SD-10: Site Design & Landscape Planning
i CASQA SD-11: Roof Runoff Controls
i CASQA SD-12: Efficient Irrigation
i CASQA SD-13: Storm Drain System Signs
4 Manufacturer's Information
12.5 ATTACHMENT 5: OPERATIONS & MAINTENANCE PLAN
This attachment includes the MS 08-01: Blue Minor Subdivision O&M Plan.
12.6 ATTACHMENT 6: FISCALLY RESPONSIBLE DATA
This attachment includes a copy of the Maintenance Agreement between the
project proponent and the City of Carlsbad.
Revision 2: October 29, 2008
^ Revision 1: June 23, 2008
WEI 07-071 - 20 - Original: November 13, 2007
d
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
12.7 ATTACHMENT 7: HYDROLOGY REPORT SUMMARY
This attachment includes a summary of the project's hydrology report. The
hydrology report is a separate document and only a summary of data is
contained in this attachment.
12.8 ATTACHMENT 8: ENGINEER'S CERTIFICATION
This attachment includes the Engineer's Certification.
d
d
Revision 2: October 29, 2008
Revision 1: June 23, 2008
WEI 07-071 • 21 - Original: November 13,2007
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
ATTACHMENT 1: CITY STANDARDS EXCERPTS
Please see the attached City of Carlsbad City Standard Excerpts referenced in this
report.
d
d
d
Table 1
Standard Development Project & Priority Project Storm Water BMP Requirements Matrix
d
d
d
d
m
LID
Site
Design
BMPs"'
Source
Control
BMPs'"
BMPs Applicable to Individual
Priority Project Categories'^'
Treatment
Control
BMPs'*'
LID
Site
Design
BMPs"'
Source
Control
BMPs'" a. Private Roads b. Residential Driveways & Guest Parkinq c. Dock Areas d. Maintenance Bays e. Vehicle Wash Areas f. Equipment Wash Areas g. Outdoor Processing Areas h. Surface Parking Areas i. Fueling Areas j. Hillside Landscaping Treatment
Control
BMPs'*'
standard Projects R R R R R R R R R R R R 0
Priority Projects:
Detached Residential
Development R R R R R S
Attached Residential
Development R R R S
Commercial Development
greaterthan 100,000 ft^ R R R R R R s
Heavy industry /Industrial R R R R R R R R S
Automotive Repair Shop R R R R R R R s
Restaurants R R R R s
Steep Hillside
Development greater than
5,000 ft
R R R R S
Parking Lots R R R(5) S
Retail Gasoline Outlets R R R R R R R s
streets. Highways &
Freeways R R s
R = Required; select one or more applicable and appropriate BMPs from the applicable steps in Section III.2.A-D, or
equivalent as identified in Appendix B.
0 = Optional/ or may be required by City staff. As appropriate, applicants are encouraged to incorporate treatment
control BMPs and BMPs applicable to individual priority project categories into the project design. City staff may
require one or more of these BMPs, where appropriate.
S = Select one or more applicable and appropriate treatment control BMPs from Appendix B.
(1) Referto Chapter 2.3.3.1. LID = Low Impact Development.
(2) Refer to Chapter 2.3.3.2.
(3) Priority project categories must apply specific storm water BMP requirements, where applicable. Priority projects
are subject to the requirements of all priority project categories that apply. Refer to Chapter 2.3.3.3
(4) Refer to Chapter 2.3.3.4
(5) Applies if the paved area totals >5,000 square feet or with >15 parking spaces and is potentially exposed to urban
runoff.
d
SWMP Rev 6/4/08
2.3 PERMANENT BEST MANAGEMENT PRACTICES SELECTION PROCEDURE
m
•m
d
m.
d
d
d
m
d
2.3.1 INTRODUCTION
The following process should be followed to determine the permanent BMPs for the applicant's project.
2.3.2 IDENTIFY POLLUTANTS AND CONDITIONS OF CONCERN
2.3.2.1 Identify Pollutants from the Project Area
Using Table 2 below, identify the project's anticipated pollutants. Pollutants associated with any
hazardous material sites that have been remediated or are not threatened by the proposed project are not
considered a pollutant of concern. Projects meeting the definition of more than one project category shall
identify all general pollutant categories that apply. Descriptions of the general pollutant categories listed
in Table 2 are defined in Appendix F under the definition of "pollutants of concern."
Table 2
Anticipated and Potential Pollutants Generated by Land Use Type
General Pollutant Categories
Project
Categories Sediments Nutrients
Heavy
Metals
Organic
Compounds
Trash
&
Debris
Oxygen
Demanding
Substances
Oil&
Grease
Bacteria
&
Viruses Pesticides
Detached
Residential
Devffilopment
x X X X X X X
Attached
Residential
Development
x X X pd) p(2) p(i) X
Commercial
Development
>100,000 ft^
p(i) p(i) p(2) X p(5) X p(3) p(5)
Heavy industry
/industrial
development
x X X X X X
Automotive
Repair Shops X X(4)(5) X X
Restaurants X X X X
steep Hillside
Development
>5,000 ft^
x X X X X X
Parking Lots p(1) p(1) X X p(1) X p(1)
Retail Gasoline
Outlets X X X X X
streets,
Highways &
Freeways
X p(1) X X(4) X p(5) X
X = anticipated
P = potential
(1) A potential pollutant if landscaping exists on-site.
(2) A potential pollutant ifthe project includes uncovered parking areas.
(3) A potential pollutant if land use involves food or animal waste products.
(4) Including petroleum hydrocarbons.
(5) Including solvents.
d
SWMP Rev 6/4/08
Table 3
Numeric Sizing Treatment Standards
Volume
1.
IV.
Flow
2.
3.0
4.0
5.0
Volume-based BMPs shall be designed to mitigate (infiltrate, filter, or treat) either:
The volume of runoff produced from a SS"" percentile storm event, as (determined from isopluvial maps
contained in the County of San Diego Hydrology Plan (0.6 inch approximate average for the San Diego
County area) [Note: Applicants may calculate the 85"^ percentile storm event using local rain data, when
available. See the County of San Diego's isopluvial map at
http://wvw.sdcountv.ca.qov/dpw/enqineer/flood.html; or
The volume of runoff produced by the 85'" percentile storm event, determined as the maximized capture
urban runoff volume for the area, from the formula recommended in Urban Runoff Quality Management,
WEF Plan of Practice No. 23/ASCE Plan of Practice No. 87, page 175 Equation 5.2; (1998); or
The volume of annual runoff based on unit basin storage volume, to achieve 90 percent or more volume
treatment by the method recommended in the latest edition of the California Stormwater Best Management
Practices Handbool<, or
The volume of runoff, as determined from the local historical rainfall record, that achieves approximately
the same reduction in pollutant loads and flows as achieved by mitigation of the 85
runoff event.
OR
percentile 24-hour
Flow-based BMPs shall be designed to mitigate (infiltrate, filter, or treat) either:
The maximum flow rate of runoff produced from a rainfall intensity of 0.2 inch of rainfall per hour for each
hour of a storm event; or
The maximum flow rate of runoff produced by the 85th percentile hourly rainfall intensity, as determined
from the local historical rainfall record, multiplied by a factor of two; or
The maximum flow rate of runoff, as determined from the local historical rainfall record, that achieves
approximately the same reduction in pollutant loads and flows as achieved by mitigation of the 85th
percentile hourly rainfall intensity multiplied by a factor of two.
d
Notes on Structural Treatment Limited Exclusions
Proposed restaurants, where the land area for development or redevelopment is less than 5,000 square
feet, are excluded from the numerical sizing criteria requirements listed in Table 3.
Where significant redevelopment results in an increase of less than 50 percent of the impervious surfaces
of a previously existing development, and the existing development was not subject to priority project
requirements, the numeric sizing criteria apply only to the addition, and not to the entire development.
m
m
n
d
d
d
d
15 SWMP Rev 6/4/08
d
2.3.3.5 Structural Treatment BMP Selection Procedure
Priority projects shall select a single or combination of treatment BMPs from the categories in Table 4 that
maximize pollutant removal for the particular pollutant(s) of concern.
1. Determine if the project would discharge to a Clean Water Act Section 303(d) impaired receiving
water. If any receiving waters for the project are impaired, identify the specific type of pollutant(s)
for which the receiving water(s) is/are impaired.
2. If the project is anticipated to generate a pollutant (per Table 2) for which the receiving water is
impaired, select one or more BMPs from Table 4 that maximize the pollutant removal for that
pollutant. Any pollutants the project is expected to generate that are also causing a Clean Water
Act section 303(d) impairment of the downstream receiving waters of the project shall be given
top priority in selecting treatment BMPs
3. If none of the project's receiving waters are listed as impaired, select one or more BMPs from
Table 4 that maximize the removal of the pollutants the project is anticipated to generate.
Alternative storm water BMPs not identified in Table 4 may be approved at the discretion of the City
Engineer, provided the alternative BMP is as effective in removal of pollutants of concern as other
feasible BMPs listed in Table 4.
Table 4. Structural Treatment Control BMP Selection Matrix
Pollutants of
Concem
Bioretention
Facilities
(LID)
Settling
Basins
(Dry Ponds)
Wet Ponds
and
Wetlands
Infiltration
Facilities or
Practices
Media
Filters
High-rate
biofiiters
High-rate
media
filters
Trash Racks &
Hydro
-dynamic
Devices
Coarse Sediment
and Trash High High High High High High High High
Pollutants that
tend to associate
with fine particles
during treatment
High High High High High Medium Medium Low
Pollutdiitb thdt
tend to be
dissolved
following
treatment
Medium Low Medium High Low Low Low Low
2.3.3.6 Notes on Pollutants of Concern
In Table 4 above, Pollutants of Concern are grouped as gross pollutants, pollutants that tend to associate
with fine particles, and pollutants that remain dissolved. The table below distinguishes the pollutant types
associated with each of these three groupings.
Pollutant Coarse Sediment
and Trash
Pollutants that tend
to associate with
fine particles during
treatment
Pollutants that tend
to be dissolved
following treatment
Sediment X X
Nutrients X X
Heavy Metals X
Organic Compounds X
Trash & Debris X
Oxygen Demanding X
Bacteria
Oil & Grease X
Pesticides X
gg
d
16 SWMP Rev 6/4/08
h M J fc J fc i fc. J fc J fc J 1 i fc i fc i i i II I i i I I i I i t I II I i
2006 CWA SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS REQUIRING TMDLS
SAN DIEGO REGIONAL WATER QUALITY CONTROL BOARD
t'SEPA APPROVAL D ATE: JUNE 28, 2007
REGION TYPE NAME
CALWATER
WATERSHED POLLUTANT/STRESSOR
POTENTIAL
SOURCES
ESTIMATED
SIZE AFFECTED
PROPOSED TMDL
COMPLETION
Toxicity 19 Miles 2019
This lislingfor toxicity appHe.s to the Aliso Creek mainstem and all the major tributaries of Aliso Creek which are
Sulphur Creek, Wood Canyon, Aliso Hills Canyon, Dairy Fork, and English Canyon.
Urban Runoff/Storm Sewers
Unknown Nonpoint Source
Unknown point source
9 E Aliso Creek (mouth) 90113000
Indicator bacteria 0.29 Acres 2005
IVonpoinf Point Source
9 L Barrett Lake 91130000
Color 125 Acres 2019
Source Unluiown
Manganese 125 Acres 2019
Source Unknown
pH 125 Acres 2019
Source Unknown
9 R Buena Creek 90432000
DDT 4.8 Miles 2019
Source Unknown
Nitrate and Nitrite 4.8 Miles 2019
Source Unknown
Phosphate 4.8 Miles 2019
SOUrcii UHKnuwn
9 R Buena Vista Creek 90421000
Sediment Toxicity 11 Miles 2019
Source Unknown
9 E Buena Vista Lagoon 90421000
Indicator bacteria 202 Acres 2008
Nonpoint/Point Source
Page 2 of 2 7
fc i fcl fc i fc tf fc « fc A fc. J fc i fc A fc i i i I i I i I i I i I i 11 If I J
2006 CWA SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS REQUIRING TMDLS
SAN DIEGO REGIONAL WATER QUALITY CONTROL BOARD
USEPA APPROVAL DATE: JUNE 28,2007
REGION TYPE NAME
CALWATER
WATERSHED
POTENTIAL ESTIMATED PROPOSED TMDL
POLLUTANT/STRESSOR SOURCES SIZE AFFECTED COMPLETION
9 C Pacific Ocean Shoreline, Buena Vista Creek
HA
90421000
Indicator bacteria 1.2 Miles 2008
Impairment locaied at Buena Vista Creek, Carlsbad City Beach al Carlsbad Village Drive, Carlsbad State Beach at Pine
Avenue.
Nonpoint/Point Source
9 C Pacific Ocean Shoreline, Dana Point HSA 90114000
Indicator bacteria 2 Miles 2005
C Pacific Ocean Shoreline, Escondido Creek 90461000
HA
C Pacific Ocean Shoreline, Imperial Beach 91010000
Pier
Impairment located at Aliso Beach at West Street, Aliso Beach at Table Rock Drive, 1000 Steps Beach at Pacific Coast
Hwy (Hospital, 9th Ave), Salt Creek (large outlet). Salt Creek Beach at Salt Creek service road. Salt Creek Beach at
Dana Strand Road, and Monarch Beach.
Nonpoint/Point Source
Indicator bacteria
Impairment located at San Elijo Lagoon outlet.
Nonpoint/Point Source
PCBs (Polychlorinated biphenyls)
Source Unknown
0.44 Miles 2008
0.42 Miles 2019
C Pacific Ocean Shoreline, Laguna Beach
HSA
90112000
9 C Pacific Ocean Shoreline, Loma Alta HA
C Pacific Ocean Shoreline, Lower San Juan
HSA
90410000
90120000
Indicator bacteria 1.8 Miles 2005
Impairment located at Main Laguna Beach, Laguna Beach at Ocean Avenue, Lagima Beach at Laguna Avenue, Laguna
Beach at Cleo Slreet, Arch Cove at Bluebird Canyon Road, Laguna Beach at Dumond Drive.
Nonpoint/Point Source
Indicator bacteria
Impairment located at Loma Alta Creek Mouth.
Nonpoint/Point Source
Indicator bacteria
1.1 Miles 2008
1.2 Miles 2008
Impairment located at North Beach Creek, San Juan Creek (large outlet), Capistrano Beach, South Capistrano Beach at
Beach Road.
Nonpoint/Point Source
Page 12 of 27
fc J fc J fc J fc.J m..M B...,M fcj fcj fcj fci li If II II Illj 1 I i J
Table 2-2. BENEFICIAL USES OF INLAND SURFACE WATERS
Inland Surface Waters 1, 2 Hydrologic
Unit Basin
Number
BENEFICIAL USE
M A
U G
N R
I
N
D
P
R
O
C
G F
R
o
P
W
F
R
o 0
R o
H W
R R B W C W R S
E E 1 A 0 1 A P
C C 0 R L L R W
1 2 L M D D E N
San Diego County Coastal Streams
Loma Alta Creek 4.10 + O • • •
Loma Alta Slouph 4.10 See Coastal Waters - Table 2-3
Buena Vista Lagoon 4.21 See Coastal Waters - Table 2-3
Buena Vista Creek 4.22 + • • • • • •
Buena Vista Creek 4.21 + • • • • • • •
Agua Hedionda 4.31 See Coastal Waters - Table 2-3
Agua Hedionda Creek 4.32 • • • • • • •
Buena Creek 4.32 • • • • • • •
Agua Hedionda Creek 4.31 • • • • • • • •
Letterbox canyon 4.31 • • • • • • •
Canyon de las Encinas 4.40 + o • • •
Cottonwood Creek 4.51 + • • • • •
Moonlight Creek 4.51 + • • • • •
• Existing Beneficial Use
O Potential Beneficial Use
Excepted from MUN (See Text)
' Waterbodies are listed multiple times if they cross hydrologic area or sub area boundaries.
^ Beneficial use designations apply to all tributaries to the indicated waterbody, if not listed separately.
Table 2-2
BENEFICIAL USES 2 - 31
fci fci fci fcj ^ J fcj fci fcj fcj fci fci II I i II i i I I i i I II
Table 2-3. BENEFICIAL USES OF COASTAL WATERS
BENEFICIAL USE
Coastal Waters
Hydrologic
Unit Basin
Number
1
N
D
N
A
V
R
E
C
1
R
E
C
2
C
0
M
M
B
1
0
L
E
S
T
w
1
L
D
R
A
R
E
M
A
R
A
Q
U
A
M
1
G
R
S
P
W
N
W
A
R
M
S
H
E
L
L
Coastal Lagoons - continued
Buena Vista Lagoon ^ 4.21 • • • O • • • •
Loma Alta Slough 4.10 • • • • • •
Mouth of San Luis Rey River 3.11 • • • • • •
Santa Margarita Lagoon 2.11 • • • • • • • •
Aliso Creek Mouth 1.13 • • • • •
San Juan Creek Mouth 1.27 • • • • • • •
San Mateo Creek Mouth 1.40 • • • • • • • •
San Onofre Creek Mouth 1.51 • • • • • • •
^ Fishing from shore or boat permitted, but other water contact recreational (REC-1) uses are prohibited.
• Existing Beneficial Use
O Potential Beneficial Use
Table 2-3
BENEFICIAL USES
2 - 53
fci fci fci fci fci fci fci fcj fcj fci fci ii ii ii ii ii ii ii ii
Table 2-5. BENEFICIAL USES OF GROUND WATERS
Ground Water Hydrologic
Unit Basin
Number
BENEFICIAL USE
M A 1
U G N
N R D
P
R
0
C
F
R
S
H
G
W
R
CARLSBAD HYDROLOGIC UNIT 4.00
Loma Alta HA 4.10
Buena Vista Creek HA 4.20
El Salto HSA 4.21 O
Vista HSA 4.22
Agua Hedionda HA 4.30
Los Monos HSA 4.31
Los Monos HSA 4.31 O O o
Los Monos HSA 4.31 O O
Buena HSA 4.32
2 These beneficial uses do not apply westerly of the easterly boundary of the right-of-way of Interstate 5 and this area is excepted from the sources of
drinking water policy. The beneficial uses for the remainder of the hydrologic area are as shown.
5 These beneficial uses designations apply to the portion of HSA 4.31 bounded on the west by thie easterly boundary of Interstate Highway 5 right-of-
way; on the east by the easterly boundary of El Camino Real; and on the north by a line extending along the southerly edge of Agua Hedionda Lagoon to
tfie easterly end of the lagoon, thence in an easterly direction to Evans Point, thence easterly to El Camino Real along the ridge lines separating Letterbox
Canyon and the area draining to the Marcario Canyon.
6 These beneficial uses apply to the portion of HSA 4.31 tributary to Agua Hedionda Creek downstream from the El Camino Real crossing, except lands
tributary to Marcario Canyon (located directly southerly of Evans Point, land directly south of Agua Hedionda Lagoon, and areas west of Interstate
Highway 5.
• Existing Beneficial Use
O Potential Beneficial Use
+ Excepted from MUN (see text)
Table 2-5
BENEFICIAL USES 2 - 60
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
ATTACHMENT 2: STORM WATER STANDARDS QUESTIONNAIRE
Please see tlie attached Storm Water Standards Appendix A: Storm Water Standards
Questionnaire for MS 08-01: Blue Minor Subdivision.
M
•m
d
APPENDIX A
STORM WATER STANDARDS QUESTIONNAIRE
INSTRUCTIONS:
This questionnaire must be completed by the applicant in advance of submitting for a development application
(subdivision and land use planning approvals and construction permits). The results of the questionnaire cletermine
the level of storm water pollution prevention standards applied to a proposed development or redevelopment
project. Many aspects of project site design are dependent upon the storm water pollution protection standards
applied to a project.
Applicant 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. A staff determination that the development application is subject to more stringent storm water
standards, than initially assessed by the applicant, will result in the return of the development application as
incomplete.
If applicants are unsure about the meaning of a question or need help in determining how to respond to one or
more of the questions, they are advised to seek assistance from Engineering Department Development Services
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, applicants for construction permits
must also complete, sign and submit a Construction Activity Storm Water Standards Questionnaire.
To address pollutants that may be generated from new development, the City requires that new development and
significant redevelopment priority projects incorporate Permanent Storm Water Best Management Practices
(BMPs) into the project design, which are described in Chapter 2 of the City's Storm Water Standards Manual This
questionnaire should be used to categorize new development and significant redevelopment projects as priority or
non-priority, to determine what level of storm water standards are required or if the project is exempt.
1. Is your project a significant redevelopment?
Definition:
Significant redevelopment is defined as the creation, addition or replacement of at least 5,000 square feet of
impervious surface on an already existing developed site.
Significant redevelopment includes, but is not limited to: tfie expansion of a building footprint; addition to or
replacement of a structure; structural development including an increase in gross floor area and/or exterior
construction remodeling; replacement of an impervious surface that is not part of a routine maintenance activity;
and land disturbing activities related with structural or impervious surfaces. Replacement of impervious surfaces
gi includes any activity that is not part of a routine maintenance activity where impervious material(s) are removed,
exposing underlying soil during construction.
Note: If the Significant Redevelopment results in an increase of less than fifty percent of the impervious surfaces of
d a previously existing development, and the existing development was not subject to SUSMP requirements, the
numeric sizing criteria discussed in Table 3 of 2.3.3.4 applies only to the addition, and not to the entire
1^ development.
2. If your project IS considered significant redevelopment, then please skip Section 1 and proceed with Section
2.
3. If your project IS NOT considered significant redevelopment, then please proceed to Section 1.
21 SWMP Rev 6/4/08
SECTION 1
NEW DEVELOPMENT
m
d
M
m
d
d
PRIORITY PROJECT TYPE
Does you project meet one or more of the following criteria: YES NO
1. Home subdivision of 100 units or more.
Includes SFD, MFD, Condominium and Apartments X
2. Residential develooment of 10 units or more.
Includes SFD, MFD, Condominium and Apartments X
3. Commercial and industrial develooment areater than 100,000 sauare feet inciudina oarkina areas.
Any development on private land that is not for heavy industrial or residential uses. Example; Hospitals,
Hotels, Recreational Facilities, Shopping Malls, etc. X
4. Heavv Industrial/Industrv areater than 1 acre (NEED SIC CODES FOR PERMIT BUSINESS TYPES^
SIC codes 5013, 5014, 5541, 7532-7534, and 7536-7539 X
5. Automotive reoair shoo.
SIC codes 5013, 5014, 5541, 7532-7534, and 7536-7539
X
6. A New Restaurant where the land area of develooment is 5.000 sauare feet or more inciudina oarkina
areas.
SIC code 5812
X
7. Hillside develooment
(1) greater than 5,000 square feet of impervious surface area and (2) development will grade on any
natural slope that is 25% or greater
X
8. Environmentallv Sensitive Area (ESA).
Impervious surface of 2,500 square feet or more located within, "directly adjacent"^ to (within 200 feet),
or "discharging directly to"^ receiving water within the ESA^
X
9. Parkina lot.
Area of 5,000 square feet or more, or with 15 or more parking spaces, and potentially exposed to urban
runoff
X
10. Retail Gasoline Outlets - servina more than 100 vehicles oer dav
Serving more than 100 vehicles per day and greater than 5,000 square feet X
11. Streets, roads, drivewavs. hiahwavs, and freewavs.
Project would create a new paved surface that is 5,000 square feet or greater. X
12. Coastal Develooment Zone.
Within 200 feet of the Pacific Ocean and (1) creates more than 2500 square feet of impermeable
surface or (2) increases impermeable surface on property by more than 10%.
X
1 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 Count
of San Diego; and any other equivalent environmentally sensitive areas which have been identified by the Copermittees.
2 "Directiy adjacent" means situated within 200 feet ofthe environmentally sensitive area.
3 "Discharging directly to" means outflow 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 lancJs.
Section 1 Results:
If you answered YES to ANY of the questions above you have a PRIORITY project and PRIORITY project requirements DO
apply. A Storm Water Management Plan, prepared in accordance with City Storm Water Standards, must be submitted at
time of application. Please check the "MEETS PRIORITY REQUIREMENTS" box in Section 3.
If you answered NO to ALL of the questions above, then you are a NON-PRIORITY project and STANDARD requirements
apply. Please check the "DOES NOT MEET PRIORITY Requirements" box in Section 3.
SWMP Rev 6/4/08
SECTION 2
SIGNIFICANT REDEVELOPMENT: YES NO
1. Is the project redeveloping an existing priority project type? (Priority projects
are defined in Section 1)
If you answered YES, please proceed to question 2.
If you answered NO, then you ARE NOT a significant redevelopment and you ARE NOT subject to
PRIORITY project requirements, only STANDARD requirements. Please check the "DOES NOT MEET
PRIORITY Requirements" box in Section 3 below.
2. Is the project solely limited to one of the following;
a. Trenching and resurfacing associated with utility work?
b. Resurfacing and reconfiguring existing surface parking lots?
c. New sidewalk construction, pedestrian ramps, or bike lane on public
and/or private existing roads?
d. Replacement of existing damaged pavement?
If you answered NO to ALL ofthe questions, then proceed to Question 3.
If you answered YES to ONE OR MORE ofthe questions then you ARE NOT a significant redevelopment
and you ARE NOT subject to PRIORITY project requirements, only STANDARD requirements. Please
check
the "DOES NOT MEET PRIORITY Requirements" box in Section 3 below.
3. Will the development create, replace, or add at least 5,000 square feet of
impervious surfaces on an existing development or, be located within 200
feet of the Pacific Ocean and (1)create more than 2500 square feet of
impermeable surface or (2) increases impermeable surface on property by
morethan 10%?
If you answered YES, you ARE a significant redevelopment, and you ARE subject to PRIORITY project
requirements. Please check the "MEETS PRIORITY REQUIREMENTS" box in Section 3 below.
If you answered NO, you ARE NOT a significant redevelopment, and you ARE NOT subject to
PRIORITY project requirements, only STANDARD requirements. Please check the "DOES NOT MEET
PRIORITY Requirements" box in Section 3 below.
SECTION 3
Questionnaire Results:
a MY PROJECT MEETS PRIORITY REQUIREMENTS, MUST COMPLY WITH PRIORITY
PROJECT STANDARDS AND MUST PREPARE A STORM WATER MANAGEMENT PLAN FOR
SUBMITTAL AT TIME OF APPLICATION.
MY PROJECT DOES NOT MEET PRIORITY REQUIREMENTS AND MUST ONLY COMPLY
WITH STANDARD STORM WATER REQUIREMENTS.
Applicant Information and Signature Box This Box for City Use Only
Address: Assessors Parcel Number(s):
150/152 CHERRY AVE. 204-231-10
Applicant Name: Applicant Title:
Applicant Signature: Date:
City Concurrence: NO
By:
Project tD.
SWMP Rev 6/4/08
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITY OF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
ATTACHMENT 3: BMP EXHIBITS
Please see the attached BMP Exhibits.
d
Prlvcuiay Profile t
Unit 'A' & Unit 'B' Garages & Basement Level Floor Plan
UNIT 'A' - Sara^e / Basement Level - 1,3 1 & tt
UNIT B' - Sarage / Basement Level - 1,t?53 ft
Common Area:
Exeroiae Rm « Equipment Rm - 375 sq ft
BASEMENT AREA CALCULATIONS:
TOTAL MEASUREMENT ALONG PERIMETER OF BUILDING COVERAGE AREA = 311'- 3" (100%) LINEAR MEASUREMENT AREA BELOW AOJACENT EJCTERIOR GRADE = 268'- 5" (86%) LINEARMEASUREMENTOFAREAABOVEAOJACENT EXTERIOR GRADE = 42'-10" (14%)
i CJrlveu/ay Profile
Blue Condominiums
150/ 1 52 CHERRY AVENUE, CARLSBAP, CALIF(9RNIA q2CC&
1 V>*tt tt rA Afein "ftKlL' Ttem ucn
c
o
13 o
•D 15 .O
tn -2
is" x g
-l <=> ?
SUBWTTAl. RECORD
PRELIMINARY REVIEW 02-07.C7
PROJECT NUMBER
UNIT 'A' < UNIT 'B'
CARPORT*
BASEMENT LEVEL
FLOOR PLAN
A.2
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
ATTACHMENT 4: BEST MANAGEMENT PRACTICES DATA
Please see the attached BMP Data, BMP Fact Sheets, and BMP Manufacturer's Data,
and Specifications.
d
Site Design & Landscape Planning SD-10
Design Objectives
Maximize Infiltration
Provide Retention
Slow Runoff
Minimize Impen/ious Land
Coverage
Prohibit Dumping of Improper
Materials
Contain Pollutants
Collect and Convey
1
d
Description
Eacli project site possesses unique topographic, hydrologic, and vegetative features, some of
which are more suitable for development than others. Integrating and incorporating
appropriate landscape planmng methodologies into the project design is the most effective
action that can be done to minimize surface and groundwater contamination from stormwater.
Approach
Landscape planning should couple consideration of land suitabiHty for urban uses with
consideration of community goals and projected growth. Project plan designs should conserve
natural areas to the extent possible, maximize natural water storage and infiltration
opportunities, and protect slopes and channels.
Suitable Applications
Appropriate applications include residential, commercial and industrial areas planned for
development or redevelopment.
Design Considerations
Design requirements for site design and landscapes planning should conform to applicable
standards and specifications of agencies with jurisdiction and be consistent with applicable
General Plan and Local Area Plan policies.
*• : ASO A
California
Stormwater
Quaiity
Association
January 2003 California Stormwater BMP Handbook
New Development and Redevelopment
www.rahmphfindhnnkq.rnm
1 of 4
SD-10 Site Design & Landscape Planning
Designing New Installations
Begin the development of a plan for the landscape unit with attention to the following general
principles:
• Formulate the plan on the basis of clearly articulated community goals. Carefully identify
conflicts and choices between retaining and protecting desired resources and community
growth.
• Map and assess land suitability for urban uses. Include the following landscape features in
the assessment: wooded land, open unwooded land, steep slopes, erosion-prone soils,
d foundation suitability, soil suitability for waste disposal, aquifers, aquifer recharge areas,
wetlands, floodplains, surface waters, agricultural lands, and various categories of urban
^ land use. When appropriate, the assessment can highhght outstanding local or regional
^ resources that the community determines should be protected (e.g., a scenic area,
recreational area, threatened species habitat, farmland, fish run). Mapping and assessment
^ should recognize not only these resources but also additional areas needed for their
sustenance.
Ml
Project plan designs should conserve natural areas to the extent possible, maximize natural
» water storage and infiltration opportunities, and protect slopes and channels.
Conserve Natural Areas during Landscape Planning
^ If applicable, the following items are required and must be implemented in the site layout
during the subdivision design and approval process, consistent with applicable General Plan and
* Local Area Plan policies:
•I • Cluster development on least-sensitive portions of a site while leaving the remaining land in
^ a natural undisturbed condition.
m
d
d
d
Limit clearing and grading of native vegetation at a site to the minimum amount needed to
build lots, allow access, and provide fire protection.
Maximize trees and other vegetation at each site by planting additional vegetation, clustering
tree areas, and promoting the use of native and/or drought tolerant plants.
• Promote natural vegetation by using parking lot islands and other landscaped areas.
M Preserve riparian areas and wetlands.
Maximize Natural Water Storage and Infiltration Opportunities Within the Landscape Unit
m Promote the conservation of forest cover. Building on land that is already deforested affects
basin hydrology to a lesser extent than converting forested land. Loss of forest cover reduces
d interception storage, detention in the organic forest floor layer, and water losses by
evapotranspiration, resulting in large peak runoff increases and either their negative effects
lj or the expense of countering them with structural solutions.
d
• Maintain natural storage reservoirs and drainage corridors, including depressions, areas of
permeable soils, swales, and intermittent streams. Develop and implement policies and
2 of 4 California Stormwater BMP Handbook January 2003
New Development and Redevelopment
www.rahmphanrlhnnk<;.rnm
d
Site Design & Landscape Planning SD-10
regulations to discourage the clearing, filling, and channeHzation of these features. Utilize
them in drainage networks in preference to pipes, culverts, and engineered ditches.
• Evaluating infiltration opportunities by referring to the stormwater management manual for
the jurisdiction and pay particular attention to the selection criteria for avoiding
groundwater contamination, poor soils, and hydrogeological conditions that cause these
facilities to fail. If necessary, locate developments with large amounts of impervious
surfaces or a potential to produce relatively contaminated runoff away from groundwater
recharge areas.
Protection of Slopes and Channels during Landscape Design
• Convey runoff safely from the tops of slopes.
• Avoid disturbing steep or unstable slopes.
• Avoid disturbing natural channels.
• Stabilize disturbed slopes as quickly as possible.
• Vegetate slopes with native or drought tolerant vegetation.
• Control and treat flows in landscaping and/or other controls prior to reaching existing
natural drainage systems.
• Stabilize temporary and permanent channel crossings as quickly as possible, and ensure that
increases in run-off velocity and frequency caused by the project do not erode the channel.
• Install energy dissipaters, such as riprap, at the outlets of new storm drains, culverts,
conduits, or channels that enter unlined channels in accordance with applicable
specifications to minimize erosion. Energy dissipaters shall be installed in such a way as to
minimize impacts to receiving waters.
• Line on-site conveyance channels where appropriate, to reduce erosion caused by increased
flow velocity due to increases in tributaiy impervious area. The first choice for linings
should be grass or some other vegetative surface, since these materials not only reduce
runoff velocities, but also provide water quality benefits from filtration and infiltration. If
velocities in the channel are high enough to erode grass or other vegetative linings, riprap,
concrete, soil cement, or geo-grid stabilization are other alternatives.
• Consider other design principles that are comparable and equally effective.
Redeveloping Existing Installations
Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.)
define "redevelopment" in terms of amounts of additional impervious area, increases in gross
floor area and/or exterior construction, and land disturbing activities with structural or
impervious surfaces. The definition of" redevelopment" must be consulted to determine
whether or not the requirements for new development apply to areas intended for
redevelopment. If the definition applies, the steps outlined under "designing new installations"
above should be followed.
January 2003 California Stormwater BMP Handbook 3 of 4
New Development and Redevelopment
www.rahmphanrlhnnkc;.rnm
m
d
SD-10 Site Design & Landscape Planning
Redevelopment may present significant opportunity to add features which had not previously
been implemented. Examples include incorporation of depressions, areas of permeable soils,
and swales in newly redeveloped areas. While some site constraints may exist due to the status
of already existing infrastructure, opportunities should not be missed to maximize infiltration,
slow runoff, reduce impervious areas, disconnect directly connected impervious areas.
Other Resources
A Manual for the Standard Urban Stormwater Mitigation Plan (SUSMP), Los Angeles County
Department of Public Works, May 2002.
Stormwater Management Manual for Westem Washington, Washington State Department of
Ecology, August 2001.
Model Standard Urban Storm Water Mitigation Plan (SUSMP) for San Diego County, Port of
San Diego, and Cities in San Diego County, February 14, 2002.
" Model Water Quality Management Plan (WQMP) for County of Orange, Orange County Flood
IS Control District, and the Incorporated Cities of Orange County, Draft February 2003.
Ventura Countywide Technical Guidance Manual for Stormwater Quality Control Measures,
July 2002.
4 of 4 California Stormwater BMP Handbook January 2003
New Development and Redevelopment
www rahmphanrlhnnkc:.rnm
4
d
Roof Runoff Controls SD-11
Design Objectives
^ Maximize Infiltration
Provide Retention
/ Slow Runoff
Minimize Impervious Land
Coverage
Proiiibit Dumping of Improper
Materials
Y Contain Pollutants
Collect and Convey
Rain Garden
Description
Various roof ranoff controls are available to address stormwater
that drains off rooftops. The objective is to reduce the total volume and rate of runoff from
individual lots, and retain the pollutants on site that may be picked up from roofing materials
and atmospheric deposition. Roof runoff controls consist of directing the roof runoff away from
paved areas and mitigating flow to the storm drain system through one of several general
approaches: cisterns or rain barrels; dry wells or infiltration trenches; pop-up emitters, and
foundation planting. The first three approaches require the roof ranoff to be contained in a
gutter and downspout system. Foundation planting provides a vegetated strip under the drip
line of the roof.
Approach
Design of individual lots for single-family homes as well as lots for higher density residential and
commercial structures should consider site design provisions for containing and infiltrating roof
runoff' or directing roof runoff to vegetative swales or buffer areas. Retained water can be reused
for watering gardens, lawns, and trees. Benefits to the environment include reduced demand for
potable water used for irrigation, improved stormwater quality, increased groundwater
recharge, decreased runoff volume and peak flows, and decreased flooding potential.
Suitable Applications
Appropriate applications include residential, commercial and industrial areas planned for
development or redevelopment.
Design Considerations
Designing New Installations
Cisterns or Rain Barrels
One method of addressing roof runoff is to direct roof downspouts
to cistems or rain barrels. A cistern is an above ground storage
vessel with either a manually operated valve or a permanently open
outlet. Roof runoff is temporarily stored and then released for
irrigation or infiltration between storms. The number of rain
9^ ^ CASQA
•^.i California
Stormwater
Quality
Association
January 2003 California Stormwater BMP Handbook
New Development and Redevelopment
www.rahmphanrihnnk.rnm
1 of 3
SD-11 Roof Runoff Controls
barrels needed is a function of the rooftop area. Some low impact developers recommend that
every house have at least 2 rain barrels, with a minimum storage capacity of lOOO liters. Roof
barrels serve several purposes including mitigating the first flush fi-om the roof which has a high
volume, amount of contaminants, and thermal load. Several types of rain barrels are
commercially available. Consideration must be given to selecting rain barrels that are vector
proof and childproof. In addition, some barrels are designed with a bypass valve that filters out
grit and other contaminants and routes overflow to a soak-away pit or rain garden.
If the cistern has an operable valve, the valve can be closed to store stormwater for irrigation or
infiltration between storms. This system requires continual monitoring by the resident or
grounds crews, but provides greater flexibility in water storage and metering. If a cistern is
provided with an operable valve and water is stored inside for long periods, the cistern must be
covered to prevent mosquitoes from breeding.
A cistern system with a permanently open outlet can also provide for metering stormwater
runoff. If the cistem outlet is significantly smaller than the size of the downspout inlet (say V4 to
V2 inch diameter), runoff will build up inside the cistem during storms, and will empty out
slowly after peak intensities subside. This is a feasible way to mitigate the peak flow increases
caused by rooftop impervious land coverage, especially for the frequent, small storms.
Dry wells and Infiltration Trenches
Roof downspouts can be directed to dry wells or infiltration trenches. A dry well is constracted
by excavating a hole in the ground and filling it with an open graded aggregate, and allowing the
water to fill the dry well and infiltrate after the storm event. An underground connection from
the downspout conveys water into the dry well, allowing it to be stored in the voids. To
minimize sedimentation from lateral soil movement, the sides and top of the stone storage
matrix can be wrapped in a permeable filter fabric, though the bottom may remain open. A
perforated observation pipe can be inserted vertically into the dry well to allow for inspection
and maintenance.
In practice, dry wells receiving runoff firom single roof downspouts have been successful over
long periods because they contain very little sediment. They must be sized according to the
amount of rooftop runoff received, but are typically 4 to 5 feet square, and 2 to 3 feet deep, with
a minimum of i-foot soil cover over the top (maximum depth of 10 feet).
To protect the foundation, dry wells must be set away from the building at least 10 feet. They
must be installed in solids that accommodate infiltration. In poorly drained soils, dry wells have
very limited feasibility.
Infiltration trenches function in a similar manner and would be particularly effective for larger
roof areas. An infiltration trench is a long, narrow, rock-filled trench with no outlet that receives
stormwater runoff. These are described under Treatment Controls.
Pop-up Drainage Emitter
Roof dovmspouts can be directed to an underground pipe that daylights some distance fi-om the
building foundation, releasing the roof mnoff through a pop-up emitter. Similar to a pop-up
irrigation head, the emitter only opens when there is flow from the roof. The emitter remains
flush to the ground during dry periods, for ease of lawn or landscape maintenance.
H 2 of 3 California Stormwater BMP Handbook January 2003
New Development and Redevelopment
d www.r3hmphanrlhnnk.rnm
d
Roof Runoff Controls SD-11
Foundation Planting
Landscape planting can be provided around the base to allow increased opportunities for
stormwater infiltration and protect the soil from erosion caused by concentrated sheet flow
coming off the roof. Foundation plantings can reduce the physical impact of water on the soil
and provide a subsurface matrbc of roots that encourage infiltration. These plantings must be
sturdy enough to tolerate the heavy runoff sheet flows, and periodic soil saturation.
Redeveloping Existing Installations
Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.)
define "redevelopment" in terms of amounts of additional impervious area, increases in gross
floor area and/or exterior constraction, and land disturbing activities with stractural or
impervious surfaces. The definition of" redevelopment" must be consulted to determine
whether or not the requirements for new development apply to areas intended for
redevelopment. If the definition applies, the steps outlined under "designing new installations"
above should be followed.
Supplemental Information
fArampZes
• City of Ottawa's Water Links Surface -Water Quality Protection Program
• City of Toronto Downspout Disconnection Program
• City of Boston, MA, Rain Barrel Demonstration Program
Other Resources
Hager, Marty Catherine, Stormwater, "Low-Impact Development", January/February 2003.
www..stnnnh9n mm
Low Impact Urban Design Tools, Low Impact Development Design Center, Beltsville, MD.
WTO.1id-storm.Matpr.net
Start at the Source, Bay Area Stormwater Management Agencies Association, 1999 Edition
January 2003 California Stormwater BMP Handbook 3 of 3
New Development and Redevelopment
www rahmphanrlhnnk rnm
Efficient Irrigation SD-12
I
4
• ^^^^
IB ' &
^•KL^ ''MMWaniijiiiiijLi • ^^^^
Design Objectives
f/ Maximize Infiltration
Provide Retention
Slow Runoff
Minimize Impervious Land
Coverage
Prohibit Dumping of Improper
Materials
Contain Pollutants
Collect and Convey
4
4
A
Description —————— ,,_«-__
Irrigation water provided to landscaped areas may result in excess irrigation water being
conveyed into stormwater drainage systems.
Approach
Project plan designs for development and redevelopment should include application methods of
irrigation water that minimize runoff of excess irrigation water into the stormwater conveyance
system.
Suitable Applications
Appropriate applications include residential, commercial and industrial areas planned for
development or redevelopment. (Detached residential single-family homes are typically
excluded from this requirement.)
Design Considerations
Designing New Installations
The following methods to reduce excessive irrigation runoff should be considered, and
incorporated and implemented where determined applicable and feasible by the Permittee:
• Employ rain-triggered shutoff devices to prevent irrigation after precipitation.
• Design irrigation systems to each landscape area's specific water requirements.
• Include design featuring flow reducers or shutoff valves triggered by a pressure drop to
control water loss in the event of broken sprinkler heads or lines.
• Implement landscape plans consistent with County or City water conservation resolutions,
which may include provision of water sensors, programmable
irrigation times (for short cycles), etc. k(2 A S O A
California
Stormwater
Quality
Association
January 2003 California Stormwater BMP Handbook
New Development and Redevelopment
www.rahmphanrihnnkq.rnm
1 of 2
SD-12 Efficient Irrigation
• Design timing and application methods of irrigation water to minimize the runoff of excess
irrigation water into the storm water drainage system.
• Group plants with similar water requirements in order to reduce excess irrigation ranoff and
promote surface filtration. Choose plants with low irrigation requirements (for example,
native or drought tolerant species). Consider design features such as:
Using mulches (such as wood chips or bar) in planter areas without ground cover to
minimize sediment in ranoff
Installing appropriate plant materials for the location, in accordance with amount of
sunlight and climate, and use native plant materials where possible and/or as
recommended by the landscape architect
Leaving a vegetative barrier along the property boundary and interior watercourses, to
act as a pollutant filter, where appropriate and feasible
Choosing plants that minimize or eliminate the use of fertilizer or pesticides to sustain
growth
• Employ other comparable, equally effective methods to reduce irrigation water runoff.
Redeveloping Existing Installations
Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.)
define "redevelopment" in terms of amounts of additional impervious area, increases in gross
floor area and/or exterior constraction, and land disturbing activities with stractural or
impervious surfaces. The definition of" redevelopment" must be consulted to determine
whether or not the requirements for new development apply to areas intended for
redevelopment. If the definition applies, the steps outlined under "designing new installations"
above should be followed.
Other Resources
A Manual for the Standard Urban Stormwater Mitigation Plan (SUSMP), Los Angeles County
Department of Public Works, May 2002.
d Model Standard Urban Storm Water Mitigation Plan (SUSMP) for San Diego County, Port of
San Diego, and Cities in San Diego County, Febraary 14, 2002.
Model Water Quality Management Plan (WQMP) for County of Orange, Orange County Flood
*' Control District, and the Incorporated Cities of Orange County, Draft Febraary 2003.
^ Ventura Countywide Technical Guidance Manual for Stormwater Quality Control Measures,
d July 2002.
d
2 of 2 California Stormwater BMP Handbook January 2003
New Development and Redevelopment
www rahmphanrihnnks.rnm
4 Storm Drain Signage SD-13
•" " " Im^ Ik.
i
d • -
Design Objectives
Maximize Infiltration
Provide Retention
Slow Runoff
Minimize Impervious Land
Coverage
^ Prohibit Dumping of Improper
Materials
Contain Pollutants
Collect and Convey
A
Description
Waste materials dumped into storm drain inlets can have severe impacts on receiving and
ground waters. Posting notices regarding discharge prohibitions at storm drain inlets can
prevent waste dumping. Storm drain signs and stencils are highly visible source controls that
are typically placed directly adjacent to storm drain inlets.
Approach
The stencil or affixed sign contains a brief statement that prohibits dumping of improper
materials into the urban runoff conveyance system. Storm drain messages have become a
popular method of alerting the public about the effects of and the prohibitions against waste
disposal.
Suitable Applications
StencOs and signs alert the public to the destination of pollutants discharged to the storm drain.
Signs are appropriate in residential, commercial, and industrial areas, as well as any other area
where contributions or dumping to storm drains is likely.
Design Considerations
Storm drain message markers or placards are recommended at all storm drain inlets within the
boundarj-' of a development project. The marker should be placed in clear sight facing toward
anyone approaching the inlet from either side. All storm drain inlet locations should be
identified on the development site map.
Designing New Installations
The following methods should be considered for inclusion in the project design and show on
project plans:
Provide stencihng or labeling of all storm drain inlets and catch
basins, constracted or modified, within the project area with
prohibitive language. Examples include "NO DUMPING -
AC AS OA
- California
Stormwater
^ilHr Association
January 2003 California Stormwater BMP Handbook
New Development and Redevelopment
www.rahmphanrihnnkg;.rnm
1 of 2
SD-13 Storm Drain Signage
DRAINS TO OCEAN" and/or other graphical icons to discourage illegal dumping.
• Post signs with prohibitive language and/or graphical icons, which prohibit illegal dumping
at public access points along channels and creeks within the project area.
Note - Some local agencies have approved specific signage and/or storm drain message placards
for use. Consult local agency stormwater staff to determine specific requirements for placard
types and methods of application.
Redeveloping Existing Installations
Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.)
define "redevelopment" in terms of amounts of additional impervious area, increases in gross
floor area and/or exterior constraction, and land disturbing activities with stractural or
impervious surfaces. If the project meets the definition of "redevelopment", then the
requirements stated under " designing new installations" above should be included in all project
design plans.
Additional Information
Maintenance Considerations
• Legibihty of markers and signs should be maintained. If required by the agency with
jurisdiction over the project, the owner/operator or homeowner's association should enter
into a maintenance agreement with the agency or record a deed restriction upon the
property title to maintain the legibility of placards or signs.
Placement
• Signage on top of curbs tends to weather and fade.
• Signage on face of curbs tends to be worn by contact with vehicle tires and sweeper brooms.
Supplemental Information
Examples
• Most MS4 programs have storm drain signage programs. Some MS4 programs will provide
stencils, or arrange for volunteers to stencil storm drains as part of their outreach program.
Other Resources
A Manual for the Standard Urban Stormwater Mitigation Plan (SUSMP), Los Angeles County
Department of Public Works, May 2002.
Model Standard Urban Storm Water Mitigation Plan (SUSMP) for San Diego County, Port of
San Diego, and Cities in San Diego County, Febraary 14, 2002.
Model Water Quality Management Plan (WQMP) for County of Orange, Orange County Flood
Control District, and the Incorporated Cities of Orange County, Draft Febraary 2003.
Ventura Countywide Technical Guidance Manual for Stormwater Quality Control Measures,
M July 2002.
2 of 2 California Stormwater BMP Handbook January 2003
New Development and Redevelopment
www.rahmphanHhnnk<;.rnm
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
ATTACHMENT 5: OPERATIONS AND MAINTENANCE PLAN
Operations & Maintenance of BMPs is essential for the success of any SUSMP. In
order to perform proper O&M MS 08-01: Blue Minor Subdivision will be required to
maintain and inspect their Post Construction BMPs for the life of the project. An
inspection schedule and maintenance directions must be prepared for each Post
Construction BMP that is install on the project site.
INSTALLED POST CONSTRUCTION BMP DEVICES
MS 08-01: Blue Minor Subdivision utilizes a detention (retarding) basin (dry pond).
INSPECTION FORM
MS 08-01: Blue Minor Subdivision may use the attached form to keep a record of
inspection and maintenance activities. The City of Carlsbad will have the required
length of time that records must be kept, but keep in mind that the City or the Regional
Water Quality Control Board can ask for inspection and maintenance records for up to
five years from the time that they occur. The attached form is general and blank and is
intended to be copied for use.
EXTENDED DETENTION (DRY) BASIN
The following is inspection and maintenance information for the detention (retarding)
basin:
Routine Action: Inspect for Standing Water
Maintenance Indicator: Standing water for more than 72 hours
Field Measurements:
Inspection Frequency:
Maintenance Activity:
- Visual Inspection
- Random side slope measurements
- Annually
- 72 hours after a target storm event (0.75 inches)
- Drain facility
- Check and unclog clogged orifice(s)
- Notify engineer, if immediate solution is not evident.
Routine Action: Inspection fro Trash and Debris
Maintenance Indicator: Debris/trash present
Field Measurements: - Visual Observation
Inspection Frequency: - During routine inspections
Maintenance Activity: Remove and dispose of trash and debris
d
d
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
Routine Action: Inspection for Sediment Management and Characterization of
Sediment for Removal
Sediment depth exceeds marker on staff gage Maintenance Indicator:
Field Measurements:
Inspection Frequency:
Maintenance Activity;
- Measure depth at apparent maximum and minimum
accumulation of sediment
- Calculate average depth
- Annually
- Remove and properly dispose of sediment
- Re-grade if necessary
Routine Action: General Maintenance Inspection
Maintenance Indicator: - Inlet structures, outlet structures, or other features
damaged, significant erosion, emergence of trees or
woody vegetation, graffiti or vandalism, etc.
Field Measurements:
Inspection Frequency:
Maintenance Activity:
- Visual Inspection
- Semi Annually
- Late wet season
- Late dry season (monthly)
- Take corrective action prior to wet season
- Consult engineers if immediate solution is not
evident
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITY OF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA
BMP INSPECTION FORM
GENERAL INFORMATION
Project Name MS 08-01: Blue Minor Subdivision (Ctierry Avenue)
City Contract No
Contractor
Inspector's Nanne
Inspector's Title
Signature
Date of Inspection
Inspection Type
(Check Applicable)
® Prior to forecast rain
® 24-hr intervals during extended rain
® After a rain event
® Other
Season
(Check Applicable) ® Rainy (Wet) ® Non-Rainy (Dry)
Storm Data
Storm Start Date & Time:
Time elapsed since last
storm (Circle Applicable Units) Min. Hr. Days
Storm Duration (hrs):
Approximate Rainfall
Amount (mm)
NOTES:
m
d
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITY OF CARLSBAD, SAN DiEGO COUNTY, CALIFORNIA
INSPECTION REQUIREMENTS
Requirement ||| N/i: Corrective Action
Extended Detention (Dry) Basin
Has any standing water been present for more than 72 hours?
Is there any trash or debris present?
Is there any accumulated sedimentation in the basin?
Is there any damage to any of the basin features?
NOTES:
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
ATTACHMENT 6: FISCALLY RESPONSIBLE DATA
Please see the attached City of Carlsbad City Maintenance Agreement form.
d
m
d
RECORDING REQUESTED BY:
City of Carlsbad
Development Services Department
WHEN RECORDED MAILTO:
City Clerk
City of Carlsbad
1200 Carlsbad Village Dr.
Carlsbad, CA. 92008
SPACE ABOVE THIS LINE FOR RECORDER'S USE
ASSESSOR'S PARCEL NO.
PROJECT NO. 2Q4-231-1Q
MS 08-01
PERMANENT STORMWATER QUALITY BEST MANAGEMENT PRACTICE MAINTENANCE
AGREEMENT
BARRY J. BLUE AND MARY T. BLUE
MS 08-01: BLUE MINOR SUBDIVISION
DATE OF AGREEMENT
OWNER NAME
PROJECT NAME
RESOLUTION NUMBER
CONDITION NUMBER
DRAWING NUMBER
STORM WATER MANAGEMENT PLAN (SWMP) NUMBER:
This agreement is made and entered into by and between the City of Carlsbad, California, a
IVIunicipal Corporation of the State of California, hereinafter referred to as "City"; and the Property
Owner named on the current Deed of Trust as referenced above, hereinafter referred to as
"Owner".
RECITALS
WHEREAS, Owner is proceeding to develop a property more particularly described in
Exhibit A, hereinafter referred to as "the Property"; and
WHEREAS, development of the Property has been approved by the City, and is subject to
the requirements of the State of California Regional Water Quality Control Board-San Diego Region
Order No. ORDER NO. 2001-01/NPDES NO. CAS0108758, as promulgated within the City of
1 OF 6 Rev.4/17/07
Carlsbad Public Works Department, Standard Urban Storm Water Mitigation Plan-Storm Water
Standards, 2003 hereinafter referred to as "storm water regulations" and incorporated herein by this
reference; and
WHEREAS, the Owner is required to comply with all Federal, State and Local storm water
regulations by employing permanent post-construction Best Management Practices (BMP's),
hereinafter referred to as "permanent BMP(s)" to ensure impacts to storm water quality are
mitigated to the maximum extent practicable (MEP) prior to being discharged from the Property;
and
WHEREAS, the City and the Owner, its successors and assigns agree that the health
safety, and welfare of the residents of Carlsbad, California, require that permanent BMP(s) be
established, constructed, inspected, and operated and maintained in perpetuity on the Property;
and
WHEREAS, the storm water regulations require that permanent BMP(s) be established,
constructed and adequately inspected, operated and maintained by the Owner, its successors and
assigns, including any homeowner or property owner association; and
WHEREAS, the Owner has caused to be prepared a Storm Water Management Plan
(SWMP) report and drawing(s) which together detail the objectives, design, construction, inspection
and operation and maintenance responsibility requirements ofthe permanent BMP(s)
recommended to mitigate impacts to storm water quality due to the development of the Property,
hereinafter collectively referred to as the "Storm Water BMP Plan" and incorporated herein by this
reference; and,
WHEREAS, stomn water regulations require that the City ensure the continued
existence and inspection, operation and maintenance ofthe permanent BMP(s); and
WHEREAS, the City has required the recordation of this agreement as a condition of
approval of the project that secures the construction, inspection, operation and maintenance of on-
site permanent BMP(s) by the Owner, its successors and assigns, inciuding any property owners
jH association, in perpetuity, and
NOW, THEREFORE, in consideration of the approval of this project, the foregoing
2 OF 6 Rev.4/17/07
m
promises, the mutual covenants contained herein, and the following terms and conditions,
Owner and City agrees as follows:
1. Owner shall comply with all the requirements of said storm water regulations and any
applicable amendments thereto, and with any other provisions of law.
2. The permanent BMP(s) shall be established and constructed by Owner, its successors
and assigns, in accordance with the plans and specifications identified in the Storm Water BMP
Plan and modification to the approved pennanent BMP(s) shall not be made without prior approval
of the City Engineer.
3. Owner, its successors and assigns, including any homeowner or property owner
association, shall adequately, inspect, operate and maintain the permanent BMP(s). This includes
all pipes and channels built to convey storm water to the facility, as well as all structures,
improvements, and vegetation provided to control the quantity and quality of the storm water runoff
and any associated practices and programs. Adequate maintenance is herein defined as good
working condition so that the permanent BMP(s) are performing in accordance with their design
objectives and functions.
4. Owner, its successors and assigns, shall inspect applicable permanent BMP(s) as often
as conditions require, or at frequencies recommended in the approved Storm Water BMP Plan, but
in any event at least once each year pnor to the rainy season. The purpose of the inspection is to
assure continued safe and proper functioning of the facilities. The inspection shall cover the entire
facilities, berms, outlet structure, pond areas, access roads, etc. Owner shall submit an Inspection
report annually to the City in a form as proscribed in the Storm Water BMP Plan or as may be
proscribed by the City. Deficiencies shall be noted in the inspection report. Any deficiencies,
repairs or maintenance obligations shall be noted in a record form and immediately remedied by the
Owner.
5. Owner shall maintain inspection, operation and maintenance records for at least five (5)
years. These records shall be made available to the City for inspection upon request at any time.
6. Owner, its successors and assigns, hereby grant permission to the City, its authorized
agents and employees, to enter upon the Property and to inspect the permanent BMP(s) whenever
3 OF 6 Rev.4/17/07
d
the City deems necessary. The purpose of inspection is to foilow-up on reported deficiencies to
respond to State and Federal mandated storm water facility inspection requirements and/or to
respond to citizen complaints. The City shall provide Owner, its successors and assigns, copies of
the inspection findings and a directive to commence with the repairs or corrective measures if
necessary.
7. In the event the Owner, its successors and assigns, fails to take corrective action to
maintain the permanent BMP(s) in good working condition acceptable to the City, the City may
enter upon the Property and take whatever steps necessarv to correct deficiencies identified in the
inspection report and to charge the costs of such repairs to the Owner, its successors and assigns.
This provision shall not be construed to allow the City to erect any structure of permanent nature on
the iand of the Owner outside of the easement for the permanent BMP(s), if an easement is
provided, or outside the limits of the permanent BMP(s) facility footprint described on the Storm
Water BMP Plan, if an easement is not provided. It is expressly understood and agreed that the
City is under no obligation to routinely maintain or repair said faciiities, and in no event shall this
Agreement be construed to impose any such obligation on the City.
8. Owner, its successors and assigns, will perform the work necessary to keep the
permanent BMP(s) in good working order as appropriate. In the event a maintenance schedule for
the permanent BMP(s) is outlined in the approved Storm Water BMP Plan, the schedule shall be
followed.
9. In the event the City pursuant to this Agreement, performs work of any nature, or
expends any funds in performance of said work for labor, use of equipment, supplies, materials,
and the like, the Owner, its successors and assigns, shall reimburse the City upon demand, within
thirty (30) days of receipt thereof for all actual costs incurred by the City hereunder. If not paid
within the prescribed time period, the City shall secure a lien against the Property in the amount of
such costs. The actions described in this section are in addition to and not in lieu of any and all
legal remedies available to the City as a result of Owner's failure to maintain the permanent
BMP(s).
4 OF 6 Rev.4/17/07
10. Owner agrees that the permanent BMP(s) are privately-owned, operated and
maintained by the Owner and acceptance of the work by the City shall not constitute a responsibility
of the City to maintain them nor a Waiver of Defects by City.
11. Owner agrees that all residual material that is a byproduct of the proper operation and
maintenance of permanent post-constmction BMP's (waste) will be disposed of according to all
federal, state and local regulations.
12. The City or any officer or employee thereof shall not be liable for any injury to persons
or property occasioned by reason of the acts or omission of Owner, its agents or employees in the
performance of this agreement. Owner further agrees to protect and hold harmless City, its officials
and employees from any and all claims, demands, causes or action, liability or loss of any sort
because or arising out of acts or omissions of Owner, its agents or employees in the performance
ofthis agreement, including claims, demands, causes of action, liability, or loss because ofor
arising out ofthe design or construction ofthe permanent post-construction BMP facilities. Said
indemnification and agreement to hold harmless shall extend to injuries to person and damages or
taking of property resulting from the design or construction of said permanent BMP(s) as provided
herein, and to adjacent property owner as a consequence of the diversion of waters from the
design, construction or maintenance of drainage systems, streets, and other improvements.
13. This Agreement shall be recorded against the Property and shall constitute a covenant
running with the land and shall be binding upon Owner, its successors and assigns, including any
homeowner or property owner association.
14. Invalidation of any one of the provisions of this Agreement shall in no way effect any
other provisions and all other provisions shall remain in full force and effect.
5 OF 6
d
IN WITNESS WHEREOF, this agreement is executed by the City of Carlsbad, acting by and
through its City Manager, pursuant to Section 20.16.060 of the Carlsbad Municipal Code
authorizing such execution, and by Owner.
APPLICANT:
BARRY J. BLUE AND MARY T. BLUE
(Name of Owner)
By:
(sign here)
(print name here)
(title and organization of signatory)
By:
(sign here)
(print name here)
CITY OF CARLSBAD, a municipal corporation of
the State of California
ROBERT T. JOHNSON, JR., P.E.
Acting City Engineer
By:.
David A. Hauser, Deputy City Engineer
RCE 33081 Exp. 06/30/2008
(title and organization of signatory)
(Proper notarial acknowledgment of execution by OWNER must be attached)
(Chairman, president or vice-president and secretary, assistant secretary, CFO or assistant
treasurer must sign for corporations. Otherwise, the corporation must attach a resolution certified
by the secretary or assistant secretary under corporate seal empowering the officer(s) signing to
bind the corporation.)
APPROVED AS TO FORM:
RONALD R. BALL
City Attorney
By:.
Deputy City Attorney
6 OF 6
EXHIBIT 'A'
m
^ 1 OF 1 Rev.4/17/07
•s
m
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
ATTACHMENT 7: HYDROLOGY REPORT SUMMARY
The following is a summary of the Hydrology Report for the MS 08-01: Blue Minor
Subdivision:
td
EXISTING CONFLUENCE POINT A SUMMARY
DATA 100-YEAR
m INTENSITY (IN/HR) 5.092
im TOTAL DISCHARGE (CFS) 0.44
Tc (MIN) 7.92
m AREA(ACRES) 0.16
mm
PROPOSED CONFLUENCE POINT A SUMMARY
tm DATA 100-YEAR
mt INTENSITY (IN/HR) 5.881
TOTAL DISCHARGE (CFS) 0.20
mm Tc(MIN) 420.14
•im AREA (ACRES) 0.16
m 6.0 COMPARISON
During the 100-Year Design Storm Event the existing condition have a discharge rate of
0.44 cfs. During the 100-Year Design Storm Event the proposed conditions will have an
approximate discharge rate of 0.20 cfs. This is a net decrease in the 100-Year Design
Storm Event of -0.24 cfs. This is directly correlated to the incorporation of the detention
(retarding) basin. The proposed conditions will also call for the installation of drainage
inserts on the project's catch basins and a sump pump to discharge water to the curb &
gutter of Cherry Avenue. Please refer to the Water Quality Technical Report for any
water quality concerns. A summary is also provided for reference here.
••I
d
m
d
CONFLUENCE PO INT A 100-YEAR COMPARISON
DATA EXISTING PROPOSED COMPARISON
INTENSITY (IN/HR) 5.092 5.881 N/A
TOTAL DISCHARGE (CFS) 0.44 0.20 -0.54
TIME OF CONCENTRATION (MIN) 7.92 420.14 N/A
AREA(ACRES) 0.16 0.16 + 0.0
WATER QUALITY TECHNICAL REPORT
MS 08-01: BLUE MINOR SUBDIVISION
CITYOFCARLSBAD, SANDIEGO COUNTY, CALIFORNIA
ATTACHMENT 8: ENGINEER'S CERTIFICATION SHEET
This Water Quality Technical Report has been prepared under the direction of the
following Registered Civil Engineer. The Registered Civil Engineer attests to the
technical information contained herein and the engineering data upon which
recommendations, conclusions, and decisions are based.
DATE
ENGINEER