HomeMy WebLinkAboutCT 02-13; FARBER; STORM WATER MANAGEMENT PLAN; 2002-10-01C 1 () 9-.-'13
STORM WATER MANAGEMENT PLAN
PERMIT NO. 02-13
Farber Condominium Project
Jefferson St. & Las Flores Dr.
Prepared By
Piro Engineering
930 Boardwalk, Suite D
San Marcos, CA 92069
(760) 744-3700
For
Farber Family Limited Partnership
Suite 104
2235 Encinitas Boulevard
Encinitas, CA 92024
October 2002
CT 02-13
TABLE OF CONTENTS
INTRODUCTION
1. Project Description ...................................... .
1.1. Hydrologic Unit Contribution ........................ .
1.2. Beneficial Use ...................................... .
1.2.1 Coastal Waters ........................ .
2. CHARACTERIZATION OF PROJECT RUNOFF
2.1. Expected Discharges ................................. .
2.2. Soil Characteristics ................................ .
3. MITIGATION MEASURES TO PROTECT \ WATER QUALITY
3.1. ConstructionBMP's ..................................... .
3.2. Post-construction BMP's ................................ .
4. OPERATION AND MAINTENANCE PROGRAM
5. ATTACHEMENT
Project Map
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INTRODUCTION
The Storm water Management Plan (SWMP) is prepared for "Priority Development Projects" as defined
by Section F.1.b.(2)(a) of California Regional Water Quality Control Board, San Diego Regions, Order
No. 2001-01. The purpose of this SWMP is to address the water quality impacts fromihe proposed
improvements on the Farber Condominium Project. Best Management Practices (BMPs) will be utilized
to provide a long-term solution to water quality. This SWMP is also intended to ensure the effectiveness
of the BMPs through proper maintenance that is based on long-term fiscal planning. The SWMP is
subject to revisions as needed by the engineer.
1.0 Project Description
The 1.15-acre Farber project is located on the Northeast comer at the intersection of Jefferson Street and
Las Flores Drive in the City of Carlsbad, in the County of San Diego, in the State of California. This
project will consist of a residential development comprised of 11 single-family condominium units.
1.1 Hydrologic Unit Contribution
The Farber property is located in the Carlsbad Hydrologic Unit in the E1 Salto Hydiologic Sub-area
(904.21). The project area is characterized by flat terrain and gentle natural slopes. The storm drain
system for this project will discharge to existing storm drains.
The proposed project will not significantly alter drainage patterns on the site. The storm water discharge
points will not divert runoff from existing conditions.
1.2 Beneficial Uses
The beneficial uses for the hydrologic unit are included in table 1.1. This table has been extracted from
the Water Quality Control Plan for the San Diego Basin.
IND -Industrial Services Supply: Includes 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.
NAV-Navigation: Includes uses of water for shipping, travel, or other transportation by private,
military, or commercial vessels.
REC1 -Contact Recreation: Includes 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.
REC2 -Non-Contact Recreation: Includes the uses of water for recreational involving proximity to
water, but not normally involving body contact with water, where ingestion of water is reasonably
possible. These uses include, but are not limited to, picnicking, sunbathing, hiking, camping, boating,
tide pool and marine life study, hunting, sightseeing, or aesthetic enjoyment in conjunction with the
above activities.
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COMM-Commercial and Sport Fishing: Includes the uses of water for comtnercial or recreational
collection of fish, shellfish, or other organisms including, but not limited to, uses involving organisms
intended for human consumption or bait purposes.
BIOL-Preservation of Biological Habitats of Special Significance: Includes uses of water that
support designated areas or habitats, such as established refuges, parks, sanctuaries, ecological reserves,
or Areas of Special Biological Significance (ASBS), where the preservation or enhancement of natural
resources requires special protection.
EST -Estuarine Habitat: Includes 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).
WILD -Wildlife Habitat: Includes uses of water that support terrestrial ecosystems including, but not .
limited to, preservation and enhancement of terrestrial habitats, vegetation, wildlife, (e.g., mammals,
birds, reptiles, amphibians, invertebrates), or wildlife water aid food sources. .
RA.RJl:-Rare, Threatened, or Endangered Species: Includes uses of water that support 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.
MAR-Marine Habitat: Includes uses of water that support ecosystems including, but not limited to,
preservation or enhancements of marine habitats, vegetation such as kelp, fish, shellfish, or wildlife
(e.g., marine mammals, shorebirds).
AQUA-Aquaculture: Includes uses of water for aquaculture or mariculture operations including, but
nor limited to, propagation, cultivation, maintenance, or harvesting of aquatic plants and animals for
hpman consumption or bait purposes.
MlGR-Migration of Aquatic Organisms: Includes uses of water that support habitats necessary for
migration; acclimatization between fresh and salt water, or other temporary activities by aquatic
organisms, such as anatropous fish. .
SPAWN-Spawning, Reproduction, and/or Early Development: Includes uses of water that support
high quality aquatic habitats suitable for reproduction and early development of fish. This use is'
applicable only for the protection of anadromous fish.
WARM -Warm Freshwater Habitat: Includes uses of water that support wami water ecosystems
including, but not limited to, preservation or enhancement of aquatic habitats, vegetation, fish or
wildlife, including invertebrates.
SHELL-Shellfish Harvesting: Includes uses of water that support habitats suitable for the collection of
filter-feeding shellfish (e.g., clams, oysters and mussels) for human ~onsumption, commercial, or sport
purposes.
1.21 Inland Surface & Coastal Waters
Inland and Coastal waters have the following beneficial uses as shown on table 1.1
Table 1.1 Beneficial Uses for Buena Vista Lagoon.
Hydrologic -~ Unit "tj 0 ..s ~ Number Z
904.21 X
* Excepted from Municipal
X Existing Beneficial Use
o Potential Beneficial Use
~ § -.S .... ~ 0 rJl C) ~ ~
X X 0
"tj ~ ro !ih ~ ta 6--Ii ~ ~ $:I.e <: r/)
X X X
. ~ --..8 ~ r/)
X
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2.0 CHARACTERIZATION OF PROJECT RUNOFF
According to the California 1998 303d list published by the San Diego Regional Water Quality Control.
Board, there are no impaired water bodies that are impacted by runoff from this project.
· The project location and watersheds have been compared to the current published 303d list of
impaired water bodies and the nearest impaired water body is the Buena Vista Lagoon,
impaired by Bacterial Indicators, Sedimentation\Siltation and Nutrient.
· This project is approximately 300' from Buena Vista Lagoon, separated by Jefferso:p.
Street and an existing condominium complex. However, all runoff will be collected and
channeled into the existing storm drain system in Jefferson Street, which carries storm water to
the lagoon.
2.1 Expected Discharges
There are no sampling data available for the existing site condition. In addition, the project is not
expected to generate significant amounts of non-visible pollutants. However, the folloWing constituents
are commonly found on similar developments and could affect water quality:
· Sediment discharge due to construction activities and post-
construction areas left bare.
· Nutrients from fertilizers
· Trash and debris deposited in drain inlets.
· Hydrocarbons from paved areas.
· Pesticides from landscaping and home use.
2.2 Soil Characteristics
The project area consists of soil group A with low runoff potential.
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3.0 MITIGATION MEASURES TO PROTECT WATER QUALITY
To address water quality for the project, BMPs will be implemented during construction and post-,
construction.
3.1 Construction BMPs
A detailed description of the construction BMPs will be developed during the Grading Plan and
Improvement Plan Engineering. Since the project is in the preliminary development phase only a listing'
of potential types of temporary BMPs are available. This includes the following:
· Silt Fence
· Fiber Rolls
· Street Sweeping and Vacuuming
· Storm Drain Inlet Protection
· Stockpile Management
· Solid Waste Management
· Stabilized Construction EntrancelExit
· Dewatering Operations
· Vehicle and Equipment Maintenance
· Erosion Control Mats
· Desilting Basin
· Gravel Bag Berm
· Sandbag Barrier
· Material Delivery and Storage
· Spill Prevention and Control
· Concrete Waste Management
· Water Cons~rvation Practices
· Paving and Grinding Operations
· Permanent Revegetation of All
disturbed uncovered areas
Construction BMPs for this project will be selected, constructed, and maintained so as to comply with
all applicable ordinances and guidance documents.
3.2 Post-construction BMPs
The following treatment control BMPs exist or will be implementt:id to addressed water quality:
Grading:
The project is designed to minimize the use of impervious areas. The only slopes on the site are the
existing driveway slope along the western boundary of the site, which will remain undisturbed and
minor slopes being created at the proposed driveway entrance off of Las Flores Drive. The remainder of
the finish-graded site will slope at less than five percent. This should limit erosion and sediment
discharge.
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Landscaping:
Landscaping is incorporated into the plans, which will include the slopes and other non-hardscape areas.
Approximately thirty percent of the site will be covered by landscaping much of which will be lawn
area. The goal is to achieve plant establishment expeditiously to reduce erosion and discharge of
sediment from the site.
Covered Parking:
All parking for the units is situated in a covered underground parking garage. Water flowing down the
access driveway is intercepted in a trench drain, which connects to the site drainage system. This should
limit hydrocarbons carried by runoff into the storm drain system.
Storm Drain Grates
All drainage inlets proposed will have grates. These grates should act to intercept trash. and debris
before entering storm drain system.
Dumpster.
The Trash Dumpster will be situated in the underground parking garage. This should limit the disbursal
of trash throughout the property with the potential of getting into the storm drain ~ystem.
Bio-filter Strips-Storm Drain Inlets
Surface storm water will be captured in storm drain inlets with grates most: of which are located in lawn
areas. Grades over these vegetated areas to the inlets are typically one to two percent. Pollutants
including sediment will be removed by filtration through the grass, sedimentation, absorption to soil
particles and infiltration through the soil which naturally has a low runoff potential.
4.0 OPERATION AND MAINTENANCE PROGRAM
The operation and maintenance requirements for each type ofBMP is as follows:
Grading:
Grading should be stabilized when complete by the landscaping proposed and shown on the plans.
Construction BMPs shall be implemented during the grading operation as discussed in section 3.1.
Landscaping:
The condominium Home Owner's Association will be responsible for maintenance of all landscaping.
Covered Parking:
Will be maintained by Home Owner's Association although it should require little maintenance.
Storm Drain Grates
Shall be maintained by Home Owner's Association with periodic inspections to remove trash or debris
deposited at grates. '
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Dumpster
Shall be rolled up driveway to street and emptied weekly.
Bio-filter Strips-Storm Drain Inlets
Landscaped areas over the entire site shall be maintained by the Home Owner's Association.
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