HomeMy WebLinkAboutCDP 04-56; Weseloh Chevrolet/Hummer; Stormwater Management Plan and Stormwater; 2006-02-09CITY OF CARLSBAD
STORMWATER MANAGEMENT PLAN
AND
STORMWATER MAINTENANCE PLAN
For:
WESELOH CHEVROLET/HUMMER
ADDITION OF HUMMER DEALERSHIP
Prepared for:
Weseloh Chevrolet/Hummer
c/o J.S. Morgan
28570 Marguerite Parkway, Suite 203
Mission Viejo, CA 92692
(949) 347-8041
Prepared by:
William F. Young
21422 Aliso Court
Lake i=orest, CA 92630
(949) 300-7565
February 19,2004
Revised February 9,2005
StxHmwater Management Plan (SWMP)
WESELOH CHEVROLET/HUMMER
OWNER'S CERTIFICATION
STORMWATER MANAGEMENT PLAN
A Stonnwater Management Plan (SWMP) is required under the Regional Water Quality Control
Board (RWQCB) Order 2001-01 and the Carlsbad Standard Urban Stormwater Mitigation Plan
(CSUSWMP). The purpose of this SWMP is to address the water quality impacts from the proposed
improvements to Weseloh Chevrolet/Hummer to include a Hummer Showroom and Display Lot -
SDP 04-16/CDP 04-56. Best Management Practices (BMPs) will be utilized to provide a long-term
solution to water quality. This SWMP is intended to ensure the effectiveness of the BMPs through
maintenance that is based on long-term planning. The SWMP is subject to revisions as directed by
the Engineer.
The undersigned, while he owns the subject property, is responsible for the implementation of the
provisions of this plan and will ensure that this plan is amended as appropriate to reflect up-to-date
conditions on the site consistent with the RWQCB Order 2001-01 and the CSUSWMP. Once the
undersigned transfers its interest in the property, its successors-in-interest shall bear the
aforementioned responsibility to implement and amend the SWMP. An appropriate number of
approved and signed copies of this document shall be available on the subject site in perpetuity.
Signed:
Name: Ben Weseloh
Title:
Company: Weseloh Chevrolet/Hummer
Address: 5335 Paseo del Norte, Carisbad, CA 92008
Telephone #: (877) 937-3564
Date: February 19, 2004
stonnwater Management Pian (SWMP)
WESELOH CHEVROLET/HUMMER
Contents
SecUon I Discretionary Permit(s) and Water Quality Conditions 1
Section II Project Description 2
Section III Site Description 3
Section IV Best Management Practices (BMPs) 9
Section V Inspection/Maintenance Responsibility for BMPs 14
Section VI Location Map, Plot Plan & BMP Details 15
Section VII Conclusion 16
Section VIII References 17
Section DC Educational Materials Included 18
Section X Water Quality Standards Inventory Database 19
WESELOH CHEVROLET/HUMMER Contents
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stormwata- Management Plan (SWMP)
WESELOH CHEVROLET/HUMMER
Section I Discretionary Permit(s) and
Water Quaiity Conditions
The City of Carlsbad requires the property owner/developer shall submit a Stormwater Management
Plan (SWMP) during the review of Site Development Plan (SDP) and Coastal Development Plan
(CDP). The SWMP will specifically identify Best Management Practices (BMPs) that will be used
on -site to control predictable pollutants from stormwater runoff". The SWMP shall be submitted to
the City of Carlsbad for review and approval. This SWMP shall identify the structural and non-
structural measures specified in the Carlsbad Standard Urban Stormwater Mitigation Plan
(CSUSWMP) which details implementation of BMPs whenever they are appUcable to a project, the
assignment of long-term maintenance responsibilities and shall reference the location(s) of structural
BMPs.
WESELOH CHEVROLET/HUMMER Section I
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Stormwater Management Plan (SWMP)
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Section II Project Description
This is a Stormwater Management Plan (SWMP) for proposed improvements to Weseloh
Chevrolet/Hummer to include a Hummer Showroom and Display Lot -PCL 05-01/CDP 04-56.
The project site currently consists of a developed auto dealership facility with six buildings that
include vehicle sales/service and parking/storage/display areas for customers and product. The total
site area is approximately six (6.0) acres. This project will construct a new auto dealership building
that will include showroom, sales offices, service drive-up, service writer offices, customer waiting
room, restrooms, retail parts, parts counter, and parts inventory. The project will also include
modification to an existing auto dealership building, construction of a screening wall, display lot
improvements, and supporting infrastructure for building improvements and landscaping.
Infrastructure improvements will include water, sewer, gas, electric, irrigation, curb & gutter,
driveways, and pavement. The total disturbed area of this project is approximately nine tenths (0.9)
acre.
WESELOH CHEVROLET/HUMMER Section II
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Section III Site Description
The site is located at 5335 Paseo del Norte and the dealership faces Paseo del Norte, its easteriy
boundary. Additional boundaries are Lot 1 of CT 72-3 along Cannon Road to the north, the San
Diego Freeway (Interstate 5) to the west and another automobile dealership to the south.
Approximately Vio of the site slopes northerly and drains across Lot 1 to Cannon Road while the
majority of the remaining site slopes westerly and drains to a landscaped swale adjacent Interstate 5
in Caltrans right-of-way. Runoff is ultimately intercepted by the existing reinforced concrete pipe
(RCP) storm drain in Cannon Road and conveyed to Agua Hedionda Lagoon. A very small portion
of the site is sloped easterly and drains to Paseo del Norte. All onsite drainage sheet flows off the
project site. There are no on-site storm drains.
Hydrologic Unit Contribution
The site lies within the Agua Hedionda Hydrologic Area Boundary 904.30 which is part of the
Carlsbad Hydrologic Unit, Hydrologic Unit Basin Number 904. The water bodies in the Agua
Hedionda Hydrologic Area are Agua Hedionda Creek, Letterbox Canyon, and Agua Hedionda
Lagoon. The total watershed size for Carisbad Hydrologic Basin is 210 square miles (134,400 acres).
This site encompasses 6.0 acres or 0.004% of the Carisbad Hydrologic Basin.
The proposed improvements lie completely within a currently developed parking lot / display area
on the site. The proposed improvements will not alter existing runoff flow pattems or runoff flow
rates. Proposed improvements do not impact the undeveloped portion of the site. The site is
approximately 75% impervious.
Beneficial Uses
MUN - Municipal and Domestic Supply: Includes uses of water for community, military, or
individual water supply systems including, but not limited to, drinking water supply. The "+"
indicates that the water body has been exempted by the Regional Board from the municipal use
designated under terms and conditions of State Board Resolution No. 88-63, Source of Drinking
Water Policy.
AGR - Agricultural Supply: Includes uses of water for farming, horticulture, or ranching including,
but not limited to, irrigation, stock watering, or support of vegetation for range grazing.
IND - Industrial Service 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.
PROC - Industrial Process Supply: Includes uses of water for industrial activities that depend
primarily on water quality.
WESELOH CHEVROLET/HUMMER Section III
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WESELOH CHEVROLET/HUMMER
GWR - Ground Water Recharge: Includes uses of water for natural or artificial recharge of
ground water for purposes of fiiture extraction, maintenance of water quality, or halting of saltwater
intrusion into freshwater aquifers.
FRSH - Freshwater Replenishment: Includes uses of water for natural or artificial maintenance of
surface water quantity or quality (e.g. salinity).
NAV - Navigation: Includes uses of water for shipping, travel, or other transportation by private,
military, or commercial vessels.
POW - Hydropower Generation: Includes uses of water for hydropower generation.
RECl - 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 uses of water for recreational activities 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.
COMM - Commercial and Sport Fishing: Includes uses of water for commercial or recreational
coUection 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 refiiges, parks, sanctuaries, ecological
reserves, or Areas of Special Biological Significance (ASBS), where the preservation of
erjhancement 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).
WARM - Warm Freshwater Habitat: Includes 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.
COLD - Cold Freshwater Habitat: Includes uses of water that support cold water ecosystems
including, but not limited to, preservation or enhancement of aquatic habitats, vegetation, fish or
wildlife, including invertebrates.
WESELOH CHEVROLET/HUMMER Section IV
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WESELOH CHEVROLET/HUMMER
WELD - Wildlife Habitat: Includes uses of water that support warm water ecosystems including,
but not limited to, preservation or enhancement of terrestrial habitats, vegetation, wildlife, (e.g.,
mammals, birds, reptiles, amphibians, invertebrates), or wildlife water and foot sources.
RARE - Rare, Threatened, or Endangered Species: Includes uses of water that support habitats
necessary, at least in part, for survival and successfiil 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 marine 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).
AQUA - Aquaculture: Including the uses of water for aquaculture or mariculture operations
including, but not limited to, propagation, cultivation, maintenance, or harvesting of aquatic plants
and animals for human consumption or bait purposes.
MIGR - 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 anadromous fish.
SPWN - 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 is
applicable only for the protection of anadromous fish.
SHELL - Shellfish Harvesting: Includes uses of water that support habitats suitable for the
collection of fiher-feeding shellfish (e.g., calms, oysters and mussels) for human consumption,
commercial, or sport purposes.
Inland Surface Waters - Inland surface waters have the following beneficial uses as shown on Table
1 below. This table has been extracted from the Water Quality Control Plan for the San Diego Basin (9).
Hydrologic
Unit
Number MUN AGR IND PROC GWR FRSH POW RECl REC2 BIOL WARM COLD WELD RARE SPWN 904.31
Agua
Hedionda
Creek
X X X X X X X
Letterbox
Canyon X X X X X X X
X Existmg Beneficial Use
WKELOH CHEVROLET/HUMMER
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WESELOH CHEVROLET/HUMMER
Coastal Waters - Coastal waters have the following beneficial uses as shown on Table 2 below.
This table has been extracted from the Water Quality Control Plan for the San Diego Basin (9).
Table 2 Beneficia 1 Uses for Coasta Waters
Hydrologic
Unit
Number IND NAV RECl REC2 COMM BIOL EST WILD RARE MAR AQUA MIGR SPWN WARM SHELL 904.31
Agua
Hedionda X X X X X X X X X X X
Lagoon
X = Existing Beneficial Use
Ground Waters - Ground waters have the following beneficial uses as shown on Table 3 below.
This table has been extracted from the Water Quality Control Plan for the San Diego Basin (9).
Table 3 Beneficial Uses for
Ground Waters
Hydrologic
Unit
Number MUN AGR IND 904.31
Agua
Hedionda
Los Monos
(2) X X X
Los Monos
(5) 0 0 0
Los Monos
(6) 0 X 0
X = Existing Beneficial Use
O = Potential Beneficial Use
2) These beneficial uses do not apply westerly ofthe easterly boundary ofthe right-of-way of Interstate Highway 5 and this area is excepted fi-om the
sources of drinking water policy. The beneficial uses for the remainder ofthe hydrologic area are as shown.
WESELOH CHEVROLET/HUMMER
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stormwater Management Plan (SWMP)
WESELOH CHEVROLET/HUMMER
5) These beneficial use designations apply to the portion of Hydrologic Subarea (HAS) 4.31 bounded on the west by the easterly boundary of taterstate
Highway 5 right-of-way, on the east by the easterly boundaiy of El Camino Real; and on the north by a line extending along the southerly edge of
Agua Hedionda Lagoon to the 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 Canyoa
6) These beneficial use designations apply to the portion of Hydrologic Subarea (HAS) 4.31 tributary to Agua Hedionda Creek downstream fi-om 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 hiterstate Highway 5.
Water Quality Obiective
Inland Surface Water - The Inland Surface Water Quality Objective for the hydrologic units are
mcluded in Table 4 below. This table has been extracted from the Water Quality Control Plan for the
San Diego Basin.
Hydrologic
Unit
Number TDS O %Na PH 1 MBAS P3 ODOR TurbNTU Color Inland
Surface
Water
904.30
o o
1/1
o o o o 0.05 o 0.75 None o o o
r-H
stimulate algae and emergent plant growth. Threshold total Phosphorus (P) concentrations shall not exceed 0.005 mg/1 in any stream at the point where
it enters any standing body of water, or 0.025 mg/1 in any standing body of water. A desired goal in order to prevent plant nuisances in streams and
other flowing water appears to be 0.1 mgl total P. These values are not to be exceeded more than 10% of the time unless studies ofthe specific body in
question clearly show that water quality objective changes are permissible and changes are approved by the Regional Board. Analogous threshold
values have not been set for Nitrogen compounds; however, natural rations of Nitrogen to Phosphorus are to be determined by surveillance and
monitoring and upheld. If data are lacking, a ratio of N:P = 10:1 shall be used. Note - Certain exceptions to the above water quality objectives are
described in Chapter 4 in the section titled Discharges to Coastal Lagoons fi-om Pilot Water Reclamation Projects and Discharges to Surface Waters.
Ground Water - The Ground Water Quality Objective for the hydrologic units are included in
Table 5 below. This table has been extracted from the Water Quality Control Plan for the San Diego
Basin.
Table 5 Ground Water Quality Objective
Hydrologic
Unit
Number
Ground
Water
904.30
(a)
Ground
Water
904.31
(a,j)
Q
H
o o
o o
o o
o o
00
o
CO
o o
Wl
o o
ai
o vo
o
vo
O
in
fe
(6
yri o
O
CO
<
o
IT)
o o
(Si O Q
O
(L> c o
e o
H
H
O
</->
fe
WESELOH CHEVROLET/HUMMER
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Section IV
Page 7
Stormwator Management Plan (SWMP)
WESELOH CHEVROLET/HUMMER
a) The water quaiity objectives do not apply westerly of the easterly boundary of Interstate Hi^way 5. The objectives for the remainder of the
Hydrologic Area (Subarea) are as shown.
j) The water quaUty objectives apply to the portion of Subarea 4.31 bounded on the west by the easterly boundary of the Interstate Highway 5 right-of-
way and on the east by the easterly boundary of El Camino Real.
Characterization of Proiect Runoff
According to the California 2002 303d list published by the San Diego Regional Water Quality
Control Board, Agua Hedionda Lagoon (Hydrologic Unit - 904.31) is an impaired water body that is
associated with this project. Agua Hedionda Lagoon is impaired by high Coliform Count and
Sedimentation/ Siltation.
Expected Discharges
There are no sampling data available for the site. An automobile dealership of this type would
typically be a source of pollutants such as heavy metals, oil and grease, solvents, soaps and
polycyclic aromatic hydrocarbons that are deposited on parking lot surfaces by motor-vehicles and
transported to storm water. The following constituents are commonly found on similar developments
and could affect water quality:
Priority Project
Categories Sediment Nutrients Heavy Metals Organic Compounds Trash & Debris Oxygen Demanding Substances_ Oil& Grease Bacteria & Viruses Pesticides Auto
Dealership
X Pl X Pl X Pl X Pl
X = Anticipated
P = Potential
1) A potential pollutant if landscaping exists on-site.
Soils Characteristics
The project area consists of Soil Type "B". Soil type "B" has a moderate infihration rate when
thoroughly wetted; chiefly soil that is moderately deep to deep, moderately well drained to well
drained, and moderately coarse textured. Rate of water transmission is moderate. The portion of the
site impacted by the proposed improvements is currently developed and is neariy 100% impervious.
The northwest portion of the site is undeveloped but, the proposed improvements have no impact to
this area.
WESELOH CHEVROLET/HUMMER
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Section IV
Pages
Stawwater Management Plan (SWMP)
WESELOH CHEVROLET/HUMMER
Section IV Best Management Practices
(BI^Ps)
To address water quality for the project, BMPs will be implemented during construction and post-
construction. The construction activities are regulated by the Califomia Statewide General
Construction Permit and City of Carlsbad.
Project Category Source Control BMPs Site Design BMPs Treatment BMPs
Auto Dealership R R R
R= Required
S = Select one or more applicable and appropriate treatment control BMPs if needed to meet Maximum Extent Practicable (MEP) and performance
standards.
Pollutant of
Concem
Treatment Control BMP Categories Biofllter Detention Basins Inflitration Basins Wet Ponds or Wetiands Drainage Inserts Filtration Continuous Flow Deflection Svstems Sediment M H H H M H M
Nutrients L M M M M M L
Heavy
Metals
M M M H M H L
Organic
Compounds
U U U U L M L
Trash &
Debris
L H U U M H M
Oxygen
Demanding
Substances
L M M M L M L
Bacteria U U H U L M L
Oil&
Grease
M M U u L H L
Pesticides U U u u L U L
WESELOH CHEVROLET/HUMMER
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CONSTRUCTION BMPs
A detailed description ofthe constmction BMPs have been developed for the Grading and Erosion
Control Plan, required as part of project approval. Details of constmction BMP's are to be shown on
the Grading and Erosion Control Plans. Below is a list of Constmction BMPs:
* Sih fence
* Stockpile management
* SoUd waste management
* Stabihzed constmction entrance/exit
* Vehicle and equipment maintenance
* Material spill prevention and control
* Concrete waste management
* Water conservation practices
* Dust controls
The selected Constmction BMPs for this project will be constmcted and maintained so as to comply
with applicable ordinances and guidance documents. The Contractor onsite vnll be responsible for
implementing and maintaining the BMPs.
POST CONSTRUCTION BMPs
Source Control BMPs
The following tables show source control BMPs (routine non-stmctural and routine stmctural)
included in this project and those that were not included.
Routine Non-Structural BMPs
Identifier Name
Check One If not applicable, state brief
reason Identifier Name
Included Not
Applicable
If not applicable, state brief
reason
N1 Education for Property Owners,
Tenants and Occupants X
N2 Activity Restrictions X
N3 Common Area Landscape
Management X
N4 BMP Maintenance X
N5 Title 22 CCR Compliance (How
development will comply) X Not applicable to the proposed
site development.
N6 Local Industrial Permit Compliance X Not applicabie to the proposed
site development.
N7 Spill Contingency Plan X
N8 Underground Storage Tank
Compliance X Not applicable to the proposed
site development.
WESELOH CHEVROLET/HUMMER
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stormwater Management Plan (SWMP)
WESELOH CHEVROLET/HUMMER
N9 Hazardous Materials Disclosure
Compliance X
N10 Uniform Fire Code Implementation X
N11 Common Area Litter Control X
N12 Employee Training X
N13 Housekeeping of Loading Docks X
N14 Common Area Catch Basin Inspection X Not applicable to the proposed
site development.
N15 Street Sweeping Private Streets and
Parking Lots X
N16 Commercial Vehicle Washing X
The routine non-stmctural Best Management Practices will be implemented through general
education of the employees, maintenance contracts, and emergency response procedures. Employee
education will include discussion of Routine Non-Stmctural BMPs Nl, N2, Nil, N12, and N16.
Maintenance contracts will include Non-Stmctural BMPs N3, N4, Nil, N12, and N15. Emergency
response procedures will include Non-Stmctural BMP N7.
Weseloh Hummer will have available on site a set of brochures developed by the County of San
Diego's Environmental Health Department for Subcontractors and facility maintenance personnel.
These will include the following. Stormwater Runoff Pollution Fact Sheet; Stormwater Runoff
Pollution Prevention Tip for; and Stormwater Pollution Prevention Yard Work (Landscape,
Gardening, Pest Control). Scheduled parking sweeping will be part of regular maintenance.
Routine Structural BMPs
Name
Check One
If not applicable, state brief reason Name
Included Not
Applicable
If not applicable, state brief reason
Provide storm drain system stenciling and
siqnaqe X Not applicable to the proposed site
development.
Design and construct outdoor material storage
areas to reduce pollution introduction X
Design and construct trash and waste storage
areas to reduce pollution introduction X Not applicable to the proposed site
development. Existing Facility on site.
Use efficient irrigation systems & landscape
design, water conservation, smart controllers,
and source control
X
Protect slopes and channels and provide
enerqy dissipation X Not applicable to the proposed site
development.
Incorporate requirements applicable to
individual priority project categories (from
SDRWQCB NPDES Permit)
X
a. Dock areas X
b. Maintenance bays X
c. Vehicle wash areas X
d. Outdoor processing areas X
e. Equipment wash areas X
W^LOH CHEVROLET/HUMMER
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f. Fueling areas X
g. Hillside landscaping X Not applicable to the proposed site
development.
h. Wash water control for food
preparation areas X Not applicable to the proposed site
development.
i. Community car wash racks X Not applicable to the proposed site
development.
Site Design BMPs
The following table shows site design BMPs that are included in this project. A description of each
BMPs follows:
Site Design BMPs
Technique
Included?
Brief Description of Method Technique
Yes No
Brief Description of Method
Minimize Impervious Area/Maximize
Permeability (C-Factor Reduction) X No opportunity; addition of building to a
site already fully developed and paved.
Minimize Directly Connected Impen/ious Areas
(DCIAs) (C-Factor Reduction) X No opportunity; addition of building to a
site already fully developed and paved.
Create Reduced or "Zero Discharge" Areas
(Runoff Volume Reduction) X No opportunity; addition of building to a
site already fully developed and paved.
Conserve Natural Areas (C-Factor Reduction) X No opportunity; addition of building to a
site already fully developed and paved.
The proposed improvements to the site include the addition of a building stmcture to an existing auto
dealership. The surface of the site is currently covered by stmctures and impervious pavement. The
site is drained by sheet flow, no storm drains exist. Incorporation of Site Design BMP techniques
listed above is not feasible.
Treatment BMPs
The following table shows treatment BMPs that are included in this project. A description of each
BMP follows:
Treatment BMPs
Name
Included?
If not applicable, state brief reason Name
Yes No
If not applicable, state brief reason
Vegetated (Grass) Strips X Insufficient area to incorporate BMP
Vegetated (Grass) Swales X Insufficient area to incorporate BMP
Proprietary Control Measures X Insufficient area to incorporate BMP
Dry Detention Basin X Insufficient area to incorporate BMP
Wet Detention Basin X Insufficient area to incorporate BMP
Constructed Wetland X Insufficient area to incorporate BMP
WESELOH CHEVROLET/HUMMER
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Detention Basin/Sand Filter X Insufficient area to Incorporate BMP
Porous Pavement Detention X Insufficient area to incorporate BMP
Porous Landscape Detention X Insufficient area to incorporate BMP
Infiltration Basin X Insufficient area to incorporate BMP
Infiltration Trench X Insufficient area to incorporate BMP
Media Filter X
Proprietary Control Measures X Insufficient area to incorporate BMP
The proposed improvements to the site include the addition of a building structure to an existing auto
dealership. The surface ofthe site is currently covered by structures and impervious pavement. The
site is drained by sheet flow, no storm drains exist. Incorporation of the Treatment BMP selected
above will require construction of two Media Filter systems along the westerly site boundary. The
selected system is a First Flush Sedimentation and Filter Unit Assembly (see attached specification
and hydraulic calculations in Section VI). These units include a debris screen and two filter media
pacts. The debris screen will capture trash and sediments. The media filters will capture sediments,
nutrients, heavy metals, organics, oxygen demanding substances, bacteria, oil and grease.
t WESELOH CHEVROLET/HUMMER
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Section V Inspection/I^aintenance
Responsibility for BMPs
Weseloh Chevrolet/Hummer is responsible for implementation and maintenance of BMPs. Sweeping
of the site parking/vehicle storage areas will be completed once a week. Inspection of irrigation
systems will be completed once a month. The Media FiUer will be inspected and cleaned once a
month. Cleaning of the Media Filter will consist of vacuuming out the sediment and debris. Filter
packs will be changed out as needed or at a minimum once a year in October.
Contact Person: Ben Weseloh Phone (877) 937-3564
WESELOH CHEVROLET/HUMMER ^ne"l4
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stormwater Management Plan (SWMP)
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Section VI Location Map, Plot Plan & BMP
Details
WESELOH OlEVROLET/HUMMER Section VI
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C T" M ^ o
5 OJ
—; ^>
—i 03
FIRST FLUSH ^'^
INLINE DEBRIS & RUNOFF
FILTRATION ilBTiNc.
(800) 438-6057
DEBRIS SCREEN
DUAL FILTRATION PACKS
OUTFLOW UP TO
24" DIAMETER PIPE
(BY OTHERS)
HYDRDLDGY MAP
PASEO r DEL NORTE
•> —nSJ-
Foothill FF
Category
Filter - Geotextile Fabric Membrane (Vertical)
Location
Monrovia, CA
COMMENTS:
The following required design Information Is not relevant to this device Including "Permanent Pool Volunfie", "Permanent Pool Surface Area",
"Permanent Pool Length", "Surcharge Detention Volume", "Surcharge Detention Volume Surface Area", "Surcharge Detention Volume Length",
"Surcharge Detention Volume Depth", "Surcharge Detention Volume Drain time", "Media Surface Area" and "Angle of sloping or vertical filter
media". Therefore, these values were not provided for this study. No influent flow or water quality data was monitored at this site, hoviwver, this
study can be used to compare effluent water quality between BMPs of a similar nature.
BMP Plan:
Foothill FF
Category
Filter - Geotextile Fabric Membrane (Vertical)
Location
Monrovia, CA
Test Site Name
Watershed Name
Foothill MS (FossilFllter)
Foothil FF
Design Information
Permanent Pool Surface Area
Permanent Pool Length
Permanent Pool Volume Upstream of Media Filter (if any)
Surcharge Detention Volume (including
volume above filter bed)
Surctiarge Detention Volume Surface Area
(including volume above filter bed)
Surcharge Detention Volume Length
Surcharge Detention Volume Design Depth
Surcharge Detention Volume Drain Time
Sloping/Vertical Filter Media Angle
Type and Depth (or Thickness) of Each Filter Media Layer
Stainless steel filter cartridge with amorphous alumina silicate
Media Filter Cost Estimates
Land Costs or Value
Construction Costs:
Excavation
Filter Construction
Engineering and Overhead
Media Filter Surface Area
Number of Filter Layers
$2,372
Year of Cost Estimate
Basin Construction
Structural Control Devices
2000
Rehabilitative Costs:
Average Annual Sediment Removal and Media Filter Replacement Costs
Foothill FF
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
Parameter
Copper, Dissolved (ug/L as Cu)
Inflow Outflow
Number of Inflow EMCs
Percent Qualified Non-detects
0
0%
Upper 95% Confidence Limit NA
Arithmetic Estimate of Mean
Inflow EMC
Based on Assumed Log.normal DtstilbulKMi
1 ^
NA
Lower 95% Confidence Limit NA
Arithmetic Estimate of Standard
Deviation of Inflow EMCs
NA
Mean Inflow EMC
Standard Deviation of Inflow EMCs
Log Mean Inflow EMC
Log Standard Deviation of Inflow EMCs
NA
NA
NA
NA
Number of Outflow EMCs 6
Percent Qualified Non-detects 0%
Upper 95% Confidence Limit 12.85
/ j \
Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Log-nonDal Distribution
3.865
Lower 95% Confidence Limit 2.258
Arithmetic Estimate of Standard
Deviation of Outflow EMCs
3.449
Mean Outflow EMC 3.583
Standard Deviation of Outflow EMCs 2.341
Log Mean Outflow EMC 1.059
Log Standard Deviation of Outflow EMCs 0.7652
Q} CO
O
j A IN 0 A , »—— ———, 1 • ' ' n Ol rr sffiSMO 211100 imioo zissioo tuioo 3fitioo 3(25(00 ulloo imm L-l I
Pate
Outflow
Upper Inner Fence
S'Quartile
0--
Lower Inner Fence -2-f
' Outside Value
-3-
I I I
70 s6
C
A
30 "*
Copper, Dissolved (ug/L as Cu)
• OUT
Summary Statistics • Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
Parameter
Copper, Dissolved (ug/L as Cu)
Summary of Distributional Characteristics
Shapiro-Wilks W-test (n<50)a = 0.05
Inflow Outflow
Inflow EMCs Normally Distributed? NA Outflow EMCs Normally Distributed? Yes
Inflow EMCs Log Nomnaily Distributed? NA Outflow EMCs Log Normally Distributed? Yes
Lilliefors Test (used when n>50) a = 0.05
Inflow Outflow
Lillifors Probability for Inflow EMCs NA Lillifors Probability for Outflow EMCs 1
Lillifors Probability for Log Transformed NA
Infiow EMCs
Lillifors Probability for Log Transformed
Outflow EMCs
0.777
Hypothesis Test Results - Raw Data
Non parametric Analysis -Mann-Whitney Test a = 0.05
Reject the Null Hypothesis that the two Yes
nneans are the same?
Mann-Whitney Probability 0
Parametric Analysis - t-Test a = 0.05
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the Wx>
means are the same? Assuming Equal
Variance.
Reject the Null Hypothesis that the two
means are the same? Assuming Unequal
Variance. NA
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test a = 0.05
Reject the Null Hypothesis that the tno
means are the same?
Yes Mann-Whitney Probability
Parametric Analysis - t-Test a = 0.05
Separate Probability
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
NA Pooled Probability
NA
Reject the Null Hypothesis that the two
means are the same? Assuming Unequal
Variance.
Test of Equal Variance - Levene Test - Log Transformed Data
Equal Variance? NA Probability
NA
NA
NA
Tliis database on vnMcli this statiaical summary is based is intended to provide a consistent and sdenMcally defensible sot of data on BMP desigis and related perfbrmance. AlKioijBti the
daUbase team has made an extensive effort to assess Die CMaBy of Hie daU entered for consistency and accuracy. Die use ofthe database inlbim*on or any aniiysis results piovided by Bie
piqect team is solely at tbe rtsk and option of «ie user. The intended purpose ofthe database is to provide a data exchange tool that permits chan«*etization of BMPs solely upon dielr measured
peffonnance ustng the same protocds for measurements and repotUng information.
The Database team does not endorse any BMP over xiolber and any assessments of performance by others should not be interpreted or reported as the recommendations of the Database team.
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
Parameter
Copper, Totai (ug/L as Cu)
Inflow
Number of Inflow EMCs
Percent Qualified Non-detects
Upper 95% Confidence Limit
Arithmetic Estimate of Mean
Inflow EMC
Based on Assumed Log.nomial Distribution
Lower 95% Confidence Limit
Arithmetic Estimate of Standard
Deviation of Inflow EMCs
0
0%
NA
NA
Mean Inflow EMC
Standard Deviation of Inflow EMCs
Log Mean Inflow EMC
Log Standard Deviation of Inflow EMCs
NA
NA
NA
NA
NA
NA
Outflow
Number of Outflow EMCs 6
Percent Qualified Non-detects 0%
Upper 95% Confidence Limit 26.03
/ j \
Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Lo^omial Distribution
5.877
Lower 95% Confidence Limit 3.196
/Arithmetic Estimate of Standard
Deviation of Outflow EMCs
6.201
Mean Outflow EMC 5.167
Standard Deviation of Outflow EMCs 3.064
Log Mean Outflow EMC 1 -397
Log Standard Deviation of Outflow EMCs 0.8651
-1 i
i
iltllOO StiHOO
Date
A IN
• OLrr
Outflow
T Upper Inner Fenoe
rr S^Quartile
Lower Inner Fenc*
Outside Value
2-!
-2-'
-t—I I I
70 #
C
4-50 «
- 30
• OUT
Copper, Total (ug/L as Cu)
Summary Statistics - Event Mean Concentrations
Foothill FF
Categon/ Parameter
Fitter - Geotextile Fabric Membrane (Vertical) Copper, Total (ug/L as Cu)
Summary of Distributional Characteristics
Hypothesis Test Results - Raw Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes Mann-WhItney Probability
means are the same?
Parametric Analysis - t-Test a = 0.05
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test a = 0.05
Reject the Null Hypothesis that the two Yes Mann-Whitney Probability
means are the same?
Parametric Analysis - t-Test a = 0.05
Shapiro-Wilks W-test (n<50)a = 0.05
Inflow Outflow
Inflow EMCs Normally Distributed? NA
Inflow EMCs Log Normally Distributed? NA
Outflow EMCs Normally Distributed? Yes
Outflow EMCs Log Normally Distributed? No
Lilliefors Test (used when n>50) a = 0.05
Inflow Outflow
Lillifors Probability for Inflow EMCs NA
Lillifors Probability for Log Transformed NA
Inflow EMCs
Lillifors Probability for Outflow EMCs 0.353
Lillifors Probability for Log Transformed 0.042
Outflow EMCs
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two Reject the Null Hypothesis that the tvw>
means are the same? Assuming Equal means are the same? Assuming Unequal
Variance. Variance.
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two Reject the Null Hypothesis that the two
means are the same? Assuming Equal means are the same?/Assuming Unequal njA
Variance. Variance.
Test of Equal Variance - Levene Test - Log Transformed Data
Equal Variance? NA Probability NA
This database on which this statistical sunanary is based is intended to provide a consislent and sciMitHlcally defensible set of daa on BMP designs and related poformance^ AllhoojJ^ Je
database team has made an extensive effoit to assess the quality of the data Bitered for consistency and accuracy, the use of the database information or any ariidysis rMUfts provided by the
pn^ team Is solely at the lisli and option of the user, Tbe intended poipose ofthe database is lo provide a data exchange tod lhat permits charactenzation of BMPs solely upon their measured
pefformance using die same protocols for measurements and reporting informaiion.
The Datal>ase team does not endoise any BMP over ai olher and any assessments of perfoimance by others should not be interpreted or reported as the recommendations ofthe Database team.
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
Parameter
Hardness, Total (mg/L as CaC03)
Inflow Outflow
Number of Inflow EMCs
Percent Qualified Non-detects
0
0%
Upper 95% Confidence Limit NA
Arithmetic Estimate of Mean
Inflow EMC
Based on Assumed Log-normal Distribution
1 '
NA
Lower 95% Confidence Limit NA
Arithmetic Estimate of Standard
Deviation of Inflow EMCs
NA
Mean Inflow EMC NA
Standard Deviation of Inflow EMCs NA
Log Mean Inflow EMC NA
Log Standard Deviation of Inflow EMCs NA
Number of Outflow EMCs 6
Percent Qualified Non-detects 0%
Upper 95% Confidence Limit 22.76
Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Log-nomiai Distribution
14.66
Lower 95% Confidence Limit 10.99
Arithmetic Estimate of Standard
Deviation of Outflow EMCs
6.081
Mean Outflow EMC 14.5
Standard Deviation of Outflow EMCs 6.091
Log Mean Outflow EMC 2.606
Log Standard Deviation of Outflow EMCs 0.3983
3
SO
(fl
O
8
J A IN
«aS)0O 2/2(00 2(12(00 2(23(00 3(*(00 3(1«0O 3/25(00 «/4(00 4/15/00 Q OUT
Pate ——
Outflow
2--
T Upper Inner Fence
•-^ S^uartile 1 •
rjUpper 95% CL _
pr Median
—TLower 95% CL
-If
•ftSuartlle
Lower Inner Fence -2- -
Outside Value
-i 1-
\*1- <^>- rp-
Hardness, Total (mg/L as CaC03)
70 sS
c
4-50 g,
30 "•
• OUT
Summary Statistics - Event Mean Concentrations
Foothill FF
Category Parameter
Fitter - Geotextile Fabric Membrane (Vertical) Hardness, Total (mg/L as CaCOS)
Summary of Distributional Characteristics
Shapiro-Wilks W-test (n<50)a = 0.05
Inflow Outflow
Inflow EMCs Nomially Distributed? NA
Inflow EMCs Log Nonnally Distributed? NA
Outflow EMCs Normally Distributed? Yes
Outflow EMCs Log Normally Distributed? Yes
Lilliefors Test (used when n>50) a = 0.05
Inflow Outflow
Liirifors Probability for Inflow EMCs NA
Lillifors Probability for Log Transfonned NA
Inflow EMCs
Lillifors Probability for Outflow EMCs 0.249
Lillifors Probability for Log Transformed 0.773
Outflow EMCs
Hypothesis Test Results - Raw Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes Mann-Whitney Probability
means are the same?
Parametric /^alysis - t-Test g = 0.05
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes Mann-Whitney Probability
means are the same?
Parametric Analysis - t-Test g = 0.05
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two Reject the Null Hypothesis that the two
means are tho same? Assuming Equal means are the same? Assuming Unequal
Variance. Variance.
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two Reject the Null Hypothesis that the two
means are the same?/Assuming Equal NA means are the same?/Assuming Unequal ff/^
Variance. Variance.
Test of Equal Variance - Levene Test - Log Transformed Data
Equal Variance? NA Probability NA
TWs database on vJiich this stKistlcal summaiy is based is intended to piovide a consistent and sclaitiflcaiiy defensible set of d*a on BMP designs and related p«1bnnan». Although die
database team has made an extensive eflbit to assess Ihe qualty ofthe dMa enteied (or consistency and accuracy, the use ofthe database informMioo or any "lasss rKults provided by the
piqectleam Is solely atlhe nsk and option ofthe user. Tbe intended puipose ofthe daUbase is lo provide a data exchange tod that permits charactenzatioo of BMPs sdely upon their measured
pertonnance using the same protocds for measurements and reporting information.
TTie Database team does not endoise any BMP over aiother and any assessments of peiformance by ottiers should not be interpreted or reported as the lecommendaBons of the Database team.
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
Parameter
Lead, Dissolved (ug/L as Pb)
Inflow Outflow
Number of Inflow EMCs
Percent Qualifled Non-detects
Upper 95% Confidence Limit
Arithmetic Estimate of Mean
inflow EMC
Based on Assumed Log.normal Distrftiution
Lower 95% Confidence Limit
Arithmetic Estimate of Standard
Deviation of Inflow EMCs
0
0%
NA
NA
NA
NA
Mean Inflow EMC
Standard Deviation of Inflow EMCs
Log Mean Inflow EMC
Log Standard Deviation of Inflow EMCs
NA
NA
NA
NA
Upper 95% Confidence Limit
Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Lognomial Distrajution
Lower 95% Confidence Limit
Arithmetic Estimate of Standard
Deviation of Outflow EMCs
Number of Outflow EMCs 6
Percent Qualified Non-detects 0%
9.511
2.748
1.585
2.53
Mean Outflow EMC 2.733
Standard Deviation of Outflow EMCs 2.747
Log Mean Outflow EMC 0.7038
Log Standard Deviation of Outflow EMCs 0.7835
A IN
2/2/00 2/12/00 2(23/00 3/4/00 3/14/00 3/25(00 4/4/00 4/15/00 d OUT
Date
100.000
10.000;
lOOOi
0.100
0.010
0.001
2 L
Outflow
r Upper Inner Fence
a^uaitile
rrUpper 95% CL
H" Median
~TLower 95% CL
ttiuartile
1,
2--
1--
0--
-1
Lower Inner Fence -2-|-
Outside Value
-»-4-
70 #
C
SO g
Lead, Dissolved (ug/L as Pb)
• OUT
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
F'B ra meter
Lead, Dissolved (ug/L as Pb)
Summary of Distributional Characteristics
Shapiro-Wilks W-test {n<50)g = 0.05
Inflow Outflow
Inflow EMCs Normally Distributed? NA Outflow EMCs Nonnally Distributed? No
Inflow EMCs Log Normally Distributed? NA Outflow EMCs Log Normally Distributed? Yes
Lilliefors Test (used when n>50) g = 0.05
Inflow Outflow
Lillifors Probability for Inflow EMCs NA Lillifors Probability for Outflow EMCs 0.019
Lillifors Probability for Log Transformed NA
Inflow EMCs
Lillifors Probability for Log Transformed
Outflow EMCs
0.778
Hypothesis Test Results - Raw Data
Nonparametric Analysis -Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes
nrieans are the same?
Mann-Whitney Probability 0
Parametric /Vnalysis - t-Test g = 0.05
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
Reject the Null Hypothesis that the two
means are the same? Assuming Unequal
Variance. NA
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes
rrieans are the same?
Mann-Whitney Probability 0
Parametric Analysis - t-Test g = 0.05
Separate Prokiability NA Pooled Probability NA
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
Reject the Null Hypothesis that the two
means are the same? Assuming Unequal
Variance. NA
Test of Equal Variance - Levene Test - Log Transformed Data
Equal Variance? NA Probability NA
Ondamer
This database on Mtiich this statistical summary is based is intended to provide a eonsistenl and scientifically defraisible set of data on BMP desif^is and related perfonnance. Although the
database team has made xn extensive effort to assess ttie quality of the (farta entered for consistency and accuracy, the use of the datatKise information or any ans^s resdts provided t)y the
pn^ect team is soieiy the ri^ and option ofthe user. The intended purpose ofthe database is to provide a data ex^uige tool that pennits charactenzation of BMPs sof^y upon ttiarmeasured
pefformance using the same pratocds for measurements and reporting inform^on.
Hie Database team does not endorse any BMP over aiolher and aiy assessments of performmce by others should not be interpreted or reported as the recommentfe^ons of the Database team.
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
Parameter
Lead, Total (ug/L as Pb)
Inflow Outflow
Number of Inflow EMCs
Percent Qualified Non-detects
0
0%
Upper 95% Confidence Limit NA
-tx
Arithmetic Estimate of Mean
inflow EMC
Based on Assumed Lag.normal Distiibutkin
h
NA
Lower 95% Confidence Limit NA
Arithmetic Estimate of Standard
Deviation of Inflow EMCs
NA
Mean Inflow EMC NA
Standard Deviation of Infiow EMCs
Log Mean Inflow EMC
Log Standard Deviation of Inflow EMCs
NA
NA
NA
Number of Outflow EMCs 6
Percent Qualified Non-detects 0%
Upper 95% Confidence Limit
/Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Log-noimal Distribuhon
Lower 95% Confidence Limit
Arithmetic Estimate of Standard
Deviation of Outflow EMCs
54.64
7.77
3.805
10.27
Mean Outflow EMC 6.517
Standard Deviation of Outflow EMCs 4.575
Log Mean Outflow EMC 1 545
Log Standard Deviation of Outflow EMCs 1.005
0)
tn
5
A IN
0 H i t i ' —' « " - n f-ii rr
«23«>0 2/2/00 2/12/00 2123100 3/4/00 3/14/00 3/25/00 4/4(00 4/15/00 LJ
Pale ^
100,000
10 0004
1.000-
0.100
0.010
0 001
K, r- .A
1
Outflow
2-
Upper Inner Fence
a^Quartile 1
Ipper 95% CL
Median
.ower 95% CL
^ I'tauattile
0--
-1--
Lower Inner Fence -2-p
Outside Value
-I 1 1-
Lead, Total (ug/L as Pb)
go
70 s5 c
50 g.
30 "
10
• OUT
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
Parameter
Lead, Total (ug/L as Pb)
Summary of Distributional Characteristics
Shapiro-Wilks W-test (n<50)g = 0.05
Inflow Outflow
inflow EMCs Normally Distributed? NA Outflow EMCs Nomially Distributed? Yes
Inflow EMCs Log Nomnaily Distributed? NA Outflow EMCs Log Normally Distributed? Yes
Lilliefors Test (used when n>50) g = 0.05
Inflow Outflow
Lillifors Probability for Inflow EMCs NA Lillifors Probability for Outflow EMCs 0.462
Lillifors Probability for Log Transformed NA
Inflow EMCs
Lillifors Probability for Log Transformed
Outflow EMCs
0.302
Hypothesis Test Results - Raw Data
Nonparametric Analysis -Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes
means are the same?
Mann-Whitney Probability 0
Parametric Analysis - t-Test g = 0.05
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
Reject the Null Hypothesis that the tviro
means are the same? Assuming Unequal
Variance. NA
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two
means are the same?
Yes Mann-Whitney Probability
Parametric Analysis - t-Test g = 0.05
Separate Probability
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
NA Pooled Probability
NA
Reject the Null Hypothesis that the two
means are the same? Assuming Unequal
Variance.
Test of Equal Variance - Levene Test - Log Transformed Data
Equal Variance? NA Probability
NA
NA
NA
Tbis database on which this sttf Istical aunvnaiy is based is intended to provide a consistent and sdentiflcally defensible set of data on BMP designs and related peiformance, Allhough die
dabbase team has made an actensivc effort to assess Ihe <»iality of the data enteied for consistency and accuracy, the use of the database intorm*ion or any analysis results provided by the
prqect team is sdely at the rtsk and option of Ihe user, Tbe intended puipose ofthe database is to provide a data exchange tod that pemiits characteilzatkin of BMPs sdely upon their measured
petfcmiance using die same protocds fOr measurements and repotting information.
The D^Ttabase team does nd endoise any BMP over anottier and any assessments of performance by ottiers should not be tnteipreted or reported as ttie recommendations of ttie Database team.
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Filter - Geotextile Fabric Membrane (Vertical)
Parameter
Nitrate Nitrogen, Total (mg/L as N)
Inflow
Number of Inflow EMCs
Percent Qualified Non-detects
Upper 95% Confidence Limit
Arithmetic Estimate of Mean
Inflow EMC
Based on Assumed Log-normal OistritHitkHi
Lower 95% Confidence Limit
Arithmetic Estimate of Standard
Deviation of Infiow EMCs
0
0%
NA
r
NA
NA
NA
Mean Infiow EMC
Standard Deviation of Inflow EMCs
Log Mean Infiow EMC
Log Standard Deviation of Inflow EMCs
NA
NA
NA
NA
Outflow
Number of Outflow EMCs 6
Percent Qualified Non-detects 0%
Upper 95% Confidence Limit 1.284
/ j ^
0.4921
0.3068
Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Log-normal Distribution
1.284
/ j ^
0.4921
0.3068 Lower 95% Confidence Limit
1.284
/ j ^
0.4921
0.3068
Arithmetic Estimate of Standard
Deviation of Outflow EMCs
0.3715
Mean Outfiow EMC 0.4817
Standard Deviation of Outfiow EMCs 0.3736
Log Mean Outflow EMC -0.9346
Log Standard Deviation of Outfiow EMCs 0.6716
3
A IN
1/23/00 2/2/00 2/12/00 2/23/00 5/4/00 3(U/00 3/25/00 4/4(00 4/15(00 d OUT
Pate
100,000 V
z
I 10,000
z
I lOOOv p
H
^ O.IOOr
g 0,010
z
0,001
t3h_—3-
> <
Outflow
r Upper Inner Fence
Jtauartile
rTUpper 95% CL
rf-Median
-tLower 95% CL
2
1
0--
T:
l^'Quaitile
Lower Inner Fence -2-
Outside Value
H 1 1 1—I—ll
70 se
c
50
30 "
• OUT
Nitrate Nitrogen, Total (mg/L as N)
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
Parameter
Nitrate Nitrogen, Total (mg/L as N)
Summary of Distributional Characteristics
Shapiro-Wilks W-test (n<50)g = 0.05
Inflow Outflow
Inflow EMCs Nomially Distributed? NA Outflow EMCs Normally Distributed? Yes
Inflow EMCs Log Nonnally Distributed? NA Outflow EMCs Log Normally Distributed? Yes
Lilliefors Test (used when n>50) g = 0.05
Inflow Outflow
Lillifors Probability for Inflow EMCs NA Lillifors Probability for Outflow EMCs 0.16
Lillifors Probability for Log Transformed NA
Inflow EMCs
Lillifors Probability for Log Transformed
Outflow EMCs
1
Hypothesis Test Results - Raw Data
Nonparametric Analysis -Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the tvw Yes
means are the same?
Mann-Whitney Probability 0
Parametric Analysis - t-Test g = 0.05
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
Reject the Null Hypothesis that the two
means are the same? Assuming Unequal
Variance. NA
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two
means are the same?
Yes Mann-Whitney Probability
Parametric Analysis - t-Test g = 0.05
Separate Probability
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
NA Pooled Probability
NA
Reject the Null Hypothesis that the two
means are the same? Assuming Unequal
Variance.
Test of Equal Variance - Levene Test - Log Transformed Data
Equal Variance? NA Probability
NA
NA
NA
This daUbase on which this statistical sunvnaiy is based is Intended to provide a consistent and scientifically defensible set of data onBMPdesignsand rdated peiformance. Although die
dabd>ase team has made an oitensive effort to assess ttie cfiality of ttw data enteied fbr consistency and accuracy, ttie use of die database inform^ on or any analysis resdts provided by ttie
piqect team is sdely at the ri* and optton of ttie user. The intended puipose of die database is to provide a data exchange tod ttiat permits chaiactetiiation of BMPs sdely upon their measured
peiformance using the same protocds fbr measurements and reporting Inltxmatton.
TTie Database team does nd endorse any BMP over aiottier and any assessments of perfoimance by others should not be interpreted or reported as the recommendations of ttie Database team.
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Filter - Geotextile Fabric Membrane (Vertical)
Parameter
Nitrogen, Kjeldahl, Totai (mg/L as N)
Inflow
Number of Inflow EMCs
Percent Qualified Non-detects
0
0%
Upper 95% Confidence Limit NA
Arithmetic Estimate of Mean
Inflow EMC
Based on Assumed Log-normal Distribution
r
NA
Lower 95% Confldenc» Limit NA
Arithmetic Estimate of Standard
Deviation of Inflow EMCs
NA
Mean Inflow EMC
Standard Deviation of Inflow EMCs
Log Mean Inflow EMC
Log Standard Deviation of Inflow EMCs
NA
NA
NA
NA
Outflow
Number of Outflow EMCs 6
Percent Qualified Non-<Jetects 0%
Upper 95% Confidence Limit
Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Log-nomial Disttibution
Lower 95% Confidence Limit
Arithmetic Estimate of Standard
Deviation of Outflow EMCs
2.05
/ j \
1.494
1.189
0.4736
Mean Outfiow EMC 1 48
Standard Deviation of Outflow EMCs 0.4302
Log Mean Outflow EMC 0.3539
Log Standard Deviation of Outfiow EMCs 0.3094
15
A IN
1123(00 2/2/0O 2/12(00 2/23(00 S(4(00 3/U(00 3/25/00 4/4/00 4/15(00 • OUT
Date
100,000 V
2
3
•8 10 000.
p
I 1.000
-I
I 0100
I
r-(u tft
Z
0,010
0,001 Outflow
T Upper Inner Fence
Stauartile
V-fUpper 95% CL
H" Median
-Wower 95% CL
1°Quaitlle
2-
1--
0--
Lower Inner Fence _2.
Outside Value
70 aS c
•i-50 a
- 30
0,80 1,20 1,60 2.00
Nitrogen, Kjeldahl, Total (mg/L as N)
2,4 • OUT
Summary Statistics - Event Mean Concentrations
Foothill FF
Category Parameter
Fitter - Geotextile Fabric Membrane (Vertical) Nitrogen, Kjeldahl, Total (mg/L as N)
Summary of Distributional Characteristics
Shapiro-Wilks W-test (n<50)g = 0.05
Inflow Outflow
Inflow EMCs Nomially Distributed? NA Outflow EMCs Normally Distributed? Yes
Inflow EMCs Log Normally Distributed? NA Outflow EMCs Log Normally Distributed? Yes
Lilliefors Test (used when n>50) g = 0.05
Inflow Outflow
Lillifors Probability for Inflow EMCs NA Lillifors Probability for Outflow EMCs 1
Lillifors Probability for Log Transformed NA
Inflow EMCs
Lillifors Probability for Log Transformed
Outflow EMCs
0.674
Hypothesis Test Results - Raw Data
Nonparametric Analysis -Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes
means are the same?
Mann-Whitney Probability 0
Parametric Analysis - t-Test g = 0.05
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
Reject the Null Hypothesis that the two
means are the same? Assuming Unequal
Variance. NA
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes Mann-Whitney Probability
means are the same?
Parametric Analysis - t-Test g = 0.05
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two Reject the Null Hypothesis that the tvira
means are the same? Assuming Equal (jA means are the same? Assuming Unequal
Variance. Variance.
Test of Equal Variance - Levene Test - Log Transformed Data
Equal Variance? NA Probability NA
¥!«?Si.e on .ftich this sbdistical summary Is based Is intend.! to provide a consistent and sdentifially defensibl. set ?" !^!»"''"^^^^
database team has made an extensive efloit to assess ttie nialty of ttie data enteied for consistency and accuracy, ttie use of ttie database infbim*ion or any ana^ss resi«s pniv^ by ttie
S^TeamS «^l^aSme rtS aSTo^Siof ttie user. Tbe int^ puipose of die datab«» I. to provide a daU exchange tod ttiat permits dian«eriiatlon ot BMPs sddy upon ttieir measured
performance using the same protocols for measurements and reporting mfonnation.
The Database team does not endorse any BMP over mother and my assessments of perfbrmance by others should not be interpreted or reported as the recommendaiions ofthe Database team.
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Filter - Geotextile Fabric Membrane (Vertical)
Parameter
Phosphorous, Total (mg/L as P)
Inflow Outflow
Number of Inflow EMCs
Percent Qualified NorKletects
0
0%
Upper 95% Confidence Limit NA
r
NA
NA
Arithmetic Estimate of Mean
Inflow EMC
Based on Assumed Log.normal Distribution
NA
r
NA
NA Lower 95% Confidence Limit
NA
r
NA
NA
Arithmetic Estimate of Standard
Deviation of Inflow EMCs
NA
Mean Inflow EMC
Standard Deviation of Infiow EMCs
Log Mean Inflow EMC
Log Standard Deviation of Inflow EMCs
NA
NA
NA
NA
Number of Outflow EMCs 6
Percent Qualified Non-detects 0%
Upper 95% Confidence Limit 60.72
0.122 Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Log^iormal Distrltiution
60.72
0.122
Lower 95% Confidence Limit 0.02733
Arithmetic Estimate of Standard
Deviation of Outflow EMCs
0.6694
Mean Outflow EMC 0.049
Standard Deviation of Outflow EMCs 0.03661
Log Mean Outflow EMC -3.822
Log Standard Deviation of Outflow EMCs 1.854
s,ooe-oa
e.aoe-02
7,00E-Oa
&.aOE-02
3
c 5ME-02
H
o
s
4.00r-02
% 3.D0EK)2
1
0) lfi 2.00E-02
;v
10OE-O2
tMiOC>00
1/23/00 2/2(00 2/12/00 2/23/00 3/4/00 3/U/OO 3(25(00 4/4(00 4/B/OO
Date
A IN
• OUT
100.000
10,000
I.OOOv
OlOOv
0.010
0,001
Outflow
Upper Inner Fence
Stouaitile
- ryvipper 95% CL
H" Median
-TLower 95% CL
ttiuartile
Lower Inner Fence
Outside Value
2-
1--
0--
-2
-3'
-I 1 llllll
70 SS
c
50 a
30 -
Phosphorous, Total (mg/L as P)
a QOUT
Summary Statistics - Event Mean Concentrations
Foothill FF
Category Parameter
Fitter - Geotextile Fabric Membrane (Vertical) Phosphorous, Total (mg/L as P)
Summary of Distributional Characteristics
Shapiro-Wilks W-test (n<50)g = 0.05
Inflow Outflow
Inflow EMCs Normally Distributed? NA
Irrflow EMCs Log Nonnally Distributed? NA
Outflow EMCs Nomially Distributed? No
Outflow EMCs Log Normally Distributed? No
Lilliefors Test (used when n>50) g = 0.05
Inflow Outflow
Lillifors Probability for Inflow EMCs NA
Lillifors Probability for Log Transformed NA
Inflow EMCs
Lillifors Probability for Outflow EMCs 0.006
Lillifors Probability for Log Transfonned 0.003
Outflow EMCs
Hypothesis Test Results - Raw Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes Mann-Whitney Probability
means are the same?
Parametric Analysis - t-Test g = 0.05
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes Mann-Whitney Probability
means are the same?
Parametric Analysis - t-Test g = 0.05
Test of Equal Variance - Levene Test - Log Transformed Data
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two Reject the Null Hypothesis that the hivo
means are the same?/Assuming Equal means are the same?/Assuming Unequal
Variance. "^^ Variance.
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two Reject the Null Hypothesis that the two
means are the same? Assuming Equal f^f^ means are the samo? /Assuming Unequal ^A
Variance. Variance.
Equal Variance? NA Probability ^NA
Thh Sase on «hich this statistical summary is based is Intended to provkle a consistent and scientifically defensible set of dala on BMP deslips and related performance^ Alttiough ttie
t^TJimrade m =Se effort tiassess ttie waHy of ttie data entered fOr consistency and accuracy, ttie use otttie database Inforaimon or anyandyss results provided by ttie
to^ jTeS^alttie nS «!roJ*nof ttie user. Tbe intSided puipose of die database Is to provide a daU exchange tod ttiat perailt. chan«terization of BMPs sdely upon ttieir measured
perfbrmance using ttie same protocds fbr measurements and reporting kiformatton.
Tbe Database tam does nd endorse anyBMPoverandherandany assessments of peiformance by ottiers should not be interpreted or reported as die recommendations of ttie Database team.
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
Parameter
Solids, Total Suspended (mg/L)
Inflow
Number of Inflow EMCs
Percent Qualified Non-detects
0
0%
Upper 95% Confidence Limit NA
Arithmetic Estimate of Mean
Inflow EMC
Based on Assumed Log^ormal Distiibution
r
NA
Lower 95% Confidence Limit NA
Arithmetic Estimate of Standard
Deviation of Inflow EMCs
NA
Mean Inflow EMC NA
Standard Deviation of Inflow EMCs NA
Log Mean Inflow EMC NA
Log Standard Deviation of Inflow EMCs NA
Outflow
Number of Outflow EMCs 6
Percent Qualified Non-detects 0%
Upper 95% Confidence Limit 31.08
Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Log-nomial Distribution
Lower 95% Confidence Limit
Arithmetic Estimate of Standard
Deviation of Outflow EMCs
26.08
22.58
4.955
Mean Outfiow EMC 26
Standard Deviation of Outflow EMCs 4.858
Log Mean Outflow EMC 3.243
Log Standard Deviation of Outflow EMCs 0.1883
cn c tfl
"8
A IN
M3M0 2/2/00 2/12/00 2/23/00 3/4(00 3/14/00 3/25/00 4/4/00 4/15/00 • OUT
Date
Outflow
- r Upper Inner Fence
3"Quartile
-JUpper 95% CL
rf" Median
f-TLowBr 95% CL
2-
1--
0-
-1
T-^ ftiuartile
Lower Inner Fence 2X.
' Outside Value ^
-3-
70 #
C
50 a «
30
20,00 25.00 30,00 35,00
Solids, Total Suspended (mg/L)
• OUT
Summary Statistics - Event Mean Concentrations
Foothill FF
Category Parameter
Fitter - Geotextile Fabric Membrane (Vertical) Solids, Total Suspended (mg/L)
Summary of Distributional Characteristics
Shapiro-Wilks W-test (n<50)g = 0.05
Inflow Outflow
Inflow EMCs Nomially Distributed? NA
Inflow EMCs Log Normally Distributed? NA
Outflow EMCs Normally Distributed? Yes
Outflow EMCs Log Normally Distributed? Yes
Lilliefors Test (used when n>50) g = 0.05
Inflow Outflow
Lillifors Probability for Inflow EMCs NA
Lillifors Probability for Log Transformed NA
Inflow EMCs
Lillifors Probability for Outflow EMCs 1
Lillifors Probability for Log Transformed 1
Outflow EMCs
Hypothesis Test Results - Raw Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the tv«D Yes Mann-Whitney Probability
means are the same?
Parametric Analysis - t-Test g = 0.05
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two Reject the Null Hypothesis that the two
means are the same? Assuming Equal means are the same?/Assuming Unequal
Variance. "^^ Variance.
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes Mann-Whitney Probability
means are the same?
Parametric Analysis - t-Test g = 0.05
Test of Equal Variance - Levene Test - Log Transformed Data
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two Reject the Null Hypothesis that the tviw
means are the same? /Assuming Equal means are the same? /Assuming Unequal ^A
Variance. Variance.
Equal Variance? NA Probability NA
ThSSase on «hich this statistical summaiy Is based is Intended to provide a consistent and sdentiUcally defensiMe set of data on BMP d«^s and '^'^^^'^^^ ,
dMabase team has made an «te<islve effort to assess ttie ifialty of ttie data entered tor consistency and accuracy, ttie use of ttie database lofbrnlibon or any andyas resdts piov^
SSamS Se^^SStti. ll* mro^inof ttie user. THe intended puipose ofthe database is to provide a data exchange tod lhat pemiits characterization of BMPs sddy upon ttieir measured
performance using fte same protocds for measurements and reporting information.
The Database team does not endorse any BMP over another and any assessments of performance by othere should not be interpreted or reported as the recommendations ofthe Database team.
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Filter - Geotextile Fabric Membrane (Vertical)
Parameter
Zinc, Dissolved (ug/L as Zn)
Inflow Outflow
Number of Inflow EMCs
Percent Qualified Non-detects
0
0%
Upper 95% Confidence Limit NA
Arithmetic Estimate of Mean
Inflow EMC
Based on Assumed Log-normal DistritHitwn
r
NA
Lower 95% Confidence Limit NA
Arithmetic Estimate of Standard
Deviation of Infiow EMCs
NA
Mean Infiow EMC
Standard Deviation of Inflow EMCs
Log Mean Inflow EMC
Log Standard Deviation of Inflow EMCs
NA
NA
NA
NA
Number of Outflow EMCs 6
Percent Qualified Non-detects 0%
Upper 95% Confidence Limit 155
/ j \
42.49
\\/
Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Log.nomial OistitHition
155
/ j \
42.49
\\/
Lower 95% Confidence Limit 24.19
Arithmetic Estimate of Standard
Deviation of Outflow EMCs
40.37
Mean Outflow EMC 38.38
Standard Deviation of Outfiow EMCs 22.95
Log Mean Outfiow EMC 3.428
Log Standard Deviation of Outflow EMCs 0.802
S
D tfl
s
fa
01 N
A IN
I/23/0O 2/2/00 2(12/00 2/23/00 3/4/00 3/14/00 3(25(00 4/4(00 4/15/00 • OUT
Date . _
100.000-
10 000-
1,000
0,1004
0,010
0,001
> <
Outflow
T Upper Inner Fence
J'Quartlle
rtUpper 95% CL
rf-Median
-tLower 95% CL
I itiuaitile
Lower Inner Fence
Outside Value
2f
1
0+
-1-
-2
-3-
Zinc, Dssolved (ug/L as Zn)
70 #
c
50 a
30 "
i<fi QOUT
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Fitter - Geotextile Fabric Membrane (Vertical)
Parameter
Zinc, Dissolved (ug/L as Zn)
Summary of Distributional Characteristics
Shapiro-Wilks W-test (n<50)g = 0.05
Inflow Outflow
Inflow EMCs Nomially Distributed? NA
Inflow EMCs Log Normally Distributed? NA
Outflow EMCs Nomially Distributed? Yes
Outflow EMCs Log Normally Distributed? Yes
Lilliefors Test (used when n>50) g = 0.05
Inflow Outflow
Lillifors Probability for Inflow EMCs NA
Lillifors Probability for Log Transformed NA
Inflow EMCs
Lillifors Probability for Outflow EMCs 0.719
Lillifors Probability for Log Transformed 0.083
Outflow EMCs
Hypothesis Test Results - Raw Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two
means are the same?
Yes Mann-WhItney Probability
Parametric Analysis - t-Test g = 0.05
Separate Probability
Reject the Null Hypothesis that the two
means are the same? /Assuming Equal
Variance.
NA Pooled Probability
NA
Reject the Null Hypothesis that the two
means are the same? Assuming Unequal
Variance.
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two
means are the same?
Yes Mann-Whitney Probability
Parametric Analysis - t-Test g = 0.05
Separate Probability
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
NA Pooled Probability
NA
Reject the Null Hypothesis that the tviro
means are the same? Assuming Unequal
Variance.
Test of Equal Variance - Levene Test - Log Transformed Data
Equal Variance? NA Probability
NA
NA
NA
NA
NA
This database on vihich ttils statistical summaiy Is based Is Intended to provkle a consistent and scientifically defonsible set of data on BMP designs and rdated performance, Alttiough ttie
database team has made an extensive effort to assess ttie i>ialty of ttie data entered for consistency and accuracy, ttie use of ttie database information or any analysis results provided by ttie
p««ect team Is sdely at Oie ride and option of ttie user. The Intended puipose of ttie database Is to provkle a data exchange tod ttiat peimlts characteri2ation of BMPs sdely upon ttieir meatijrod
perfoimance using ttie same protocds for measurements and repotting informatton.
Tbe Database team does not endorse any BMP over anodier and any assessments of performance by ottiers should not be intiiipieted or reported as »ie recommendations of Bie Database team.
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Filter - Geotextile Fabric Membrane (Vertical)
Parameter
Zinc, Total (ug/L as Zn)
Inflow Outflow
Number of Inflow EMCs
Percent Qualified Non-cJetects
Mean Inflow EMC
Standard Deviation of Inflow EMCs
Log Mean Inflow EMC
Log Standard Deviation of Inflow EMCs
0
0%
Upper 95% Confidence Limit NA
-tx
Arithmetic Estimate of Mean
Inflow EMC
Based on /Assumed log4ioimal Distribution
h
NA
Lower 95% Confidence Limit
Xj/
NA
Arithmetic Estimate of Standard
Deviation of Infiow EMCs
NA
NA
NA
NA
NA
Number of Outflow EMCs
Percent Qualified Non-detecte
Upper 95% Confidence Limit 342.1
Arithmetic Estimate of Mean
Outflow EMC
Based on Assumed Lognomial Distitxitkxi
60.9
31.27 Lower 95% Confidence Limit
60.9
31.27
Arithmetic Estimate of Standard
Deviation of Outfiow EMCs
72.97
Mean Outfiow EMC 51.67
Standard Deviation of Outflow EMCs 31.57
Log Mean Outflow EMC 3.664
Log Standard Deviation of Outflow EMCs 0.9436
i
A IN
2/2/00 2(12/00 2/23/00 3/4/00 3fl4/00 3(25(00 4/4/00 4/15/00 • OUT
Date
Outflow
Upper Inner Fence
S^Quartile
2-
1--
0-
-1
Lovi/er Inner Fence -2'"
Outside Value
-i 1 Illll
Zinc, Total (ug/L as Zn)
70 ^ c
50 g.
19
30
• OUT
Summary Statistics - Event Mean Concentrations
Foothill FF
Category
Filter - Geotextile Fabric Membrane (Vertical)
Parameter
Zinc, Total (ug/L as Zn)
Summary of Distributional Characteristics
Shapiro-Wilks W-test (n<50)g = 0.05
Inflow Outflow
Inflow EMCs Normally Distributed? NA Outflow EMCs Nomially Distributed? Yes
Inflow EMCs Log Nonnally Distributed? NA Outflow EMCs Log Normally Distributed? No
Lilliefors Test (used when n>50) g = 0.05
Inflow Outflow
Lillifors Probability for Inflow EMCs NA Lillifors Probability for Outflow EMCs 0.211
Lillifors Probability for Log Transformed NA
Inflow EMCs
Lillifors Probability for Log Transformed
Outflow EMCs
0.027
Hypothesis Test Results - Raw Data
Nonparametric Analysis -Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two Yes
means are the same?
Mann-Whitney Probability 0
Parametric Analysis - t-Test g = 0.05
Separate Probability NA Pooled Probability NA
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
Reject the Null Hypothesis that the two
means are the same? Assuming Unequal
Variance. NA
Hypothesis Test Results - Log Transformed Data
Nonparametric Analysis - Mann-Whitney Test g = 0.05
Reject the Null Hypothesis that the two
means are the same?
Yes Mann-Whitney Probability
Parametric Analysis - t-Test g = 0.05
Separate Probability
Reject the Null Hypothesis that the two
means are the same? Assuming Equal
Variance.
NA Pooled Probability
Reject the Null Hypothesis that the tm
f^f^ means are the same? Assuming Unequal
Variance.
Test of Equal Variance - Levene Test - Log Transformed Data
Equal Variance? NA Probability
NA
NA
NA
This database on idiich ttiis statistical summary Is based is intended to provkle a consistent and scientifically defensible sot of data on BMP designs and related perfonnance. Alttiough die
itaMnse team has made an SKtenstve effort to assess ttie i^iallty of ttie data entered for consistency and accuracy, ttie use of ttw database infbimdion or any analysis resdts pravided by ttie
pngcet team is sdety at ttie risk and optton of ttie user. The intended purpose of die database Is to provide a data exchange tod Biat permits characterization of BMPs sdely upon ttieir meaaired
perfbnnance using tfie same protocds for measurements and reporting information.
The Database team does ntt endorse any BMP over anottier and any assessments of perfonnance by ottiers shoild not be interpreted or reported as ttie recommendations of ttie Database team.
stormwata Management Plan (SWMP)
WESELOH CHEVROLET/HUMMER
Section VII Conclusion
The Treatment BMP selected to be incorporated into this project will capture the major constituents
tributary to Agua Hedionda Lagoon. Proposed improvements to the site include the addition of a
building structure and pavement reconstruction to an existing auto dealership. The surface ofthe site
is currently covered by structures and impervious pavement. Site drainage is accomplished by sheet
flow of runoff. The media filters and trench drain inlets will be constructed to satisfy the structural
BMP requirement.
Construction BMPs and Source Control BMPs will be incorporated in the site development,
construction and operation to limit storm water poUution to maximum extent practicable (MEP).
WESELOH CHEVROifT/HUMMER Section VH
J:\27S9\0002\SWMP 021904.doc Page 16
Febmary 19,2004
Sbnmwater Management Plan (SWMP)
WESELOH CHEVROLET/HUMMER
Section VIII References
* Water Quality Control Plan for the San Diego Basin (9) Califomia Regional Water Quality
Control Board, San Diego Region, September 8, 1994.
* County of San Diego Stormwater Management Requirements and Guidelines 2000-2001.
* Califomia Stormwater Best Management Practice Handbooks, Califomia Stormwater Quality
Association (CASQA) January 2003.
* 2002 CWA Section 303(d) List of Water Quality Limited Segment, San Diego Regional
Water Quality Control Board, approved by USEPA July 2003.
WESELOH oiEVROLET/HUMMER Section vm
3:\2759\0002\SWMP 021904.doc Page 17
Febmary 19, 2004
stormwater Management Man (SWMP)
WESELOH CHEVROLET/HUMMER
Section IX Educational Materiais Included
The following is a list of educational materials included in this SWMP.
• The Ocean Begins at Your Front Door
• Do You Know Where the Water in Your Storm Drain Goes?
• Landscape & Garden
• Keeping Pest Control Products Out of Creeks, Rivers and Oceans
• Non-Stormwater Discharges SC-10
• Spill Prevention, Control & Cleanup SC-11
• Building and Grounds Maintenance SC-41
• Parking/Storage Area Maintenance SC-43
• Site Design & Landscape Planning SD-10
• Efficient Irrigation SD-12
WESELOH CHEVROLET/HUMMER Section I
J:\2759\0002\SWMP 021904.doc Page 18
Febmary 19, 2004
Stmmwater Management Plan (SWMP)
WESELOH CHEVROLET/HUMMER
Section X Water Quality Standards
Inventory Database
The Carlsbad Hydrologic Unit (4.00) is a roughly triangular-shaped area of about 210 square
miles, extending fi-om Lake Wohlford on the east to the Pacific Ocean on the west, and fi-om Vista
on the north to Cardiff'-by-the-Sea on the south. The unit includes the cities of Oceanside,
Carlsbad, Leucadia, Encinitas, Cardiff-by-the-Sea, Vista and Escondido. The area is drained by
Buena Vista, Agua Hedionda, San Marcos and Escondido creeks.
The Carisbad Unit contains four major coastal lagoons; Buena Vista, Agua Hedionda, Batiquitos
and San Elijo. Buena Vista Ues between the cities of Carlsbad and Oceanside, and is partially
within each city. A sandbar occasionally forms across the mouth forming an ocean beach. The
water level in the lagoon is maintained by an inflow of rising groundwater and return irrigation
water fi-om the area upstream on Vista Creek. A portion of the lagoon has been designated as a bird
sanctuary.
Agua Hedionda Lagoon, at the mouth of Agua Hedionda Creek, is within the city of Carisbad. The
lagoon is routinely dredged to keep it open to the ocean. The lagoon serves as an integral part of a
utility's power plant cooling intake system and also provides a reserve cooling water supply. The
easterly portion of the lagoon is used for water oriented recreation.
WESELOH CHEVROUET/HUMMER Section I
3:\2759\0002\SWMP 021904.doc Page 19
Febmary 19, 2004
Only Rain in the Storm Drain!
storm Water Protection...
It's OUR Busmess!
Did You Know.
The primary purpose of storm drains is to carry rain water
away from developed areas to prevent flooding. Storm
drains are not connected to sanitary sewer systems and
treatment plants. Untreated storm water and the
pollutants it carries flow directly to creeks, lagoons and the
ocean.
Storm water pollution comes from a variety of sources
including:
• Oil, fuel and fluids from
vehicles and heavy
equipment
Lawn clippings, pesticide
and fertilizer runoff from
landscaping
• Sediment and
concrete from
construction and
landscaping activities
• Bacteria from human and animal waste
• Litter
The City of Carlsbad is committed to improving water
quality and reducing the amount of pollutants that enter
our precious waterways.
Why do we need a clean environment?
Having a clean environment is of primary importance for
our health and economy. Clean waterways provide
commercial opportunities, recreation, fish habitat and
add beauty to our
landscape. All of us
benefit from clean
water-and all of us
have a role in making
and keeping our
creeks, lagoons and
ocean clean.
EVERYONE is responsible for protecting storm water!
Storm Water pollution prevention is a shared duty between
the City of Carlsbad and the Community. Storm drains on
public property are monitored and cleaned by the City.
Everyone has a part to play in keeping our storm drains free
of pollutants. Methods used to prevent storm water pollution
are called Best Management Practices (BMPs).
Help keep our creeks, lagoons and ocean clean!
Below are some BMPs you can use at home.
Sweep or Rake
• Sweep up debris and put it in a trash can.
Do not use a hose to wash off sidewalks,
parking areas and garages. Rake up
yard waste and start a compost pile.
Reduce Use of Landscape Chemicals
• Minimize the use of lawn and garden care products
such as pesticides, insecticides, weed killers,fertilizers,
herbicides and other chemicals. Avoid over-irrigation
which washes chemicals into the gutter and storm drains.
Use Soap Sparingly
• When washing your car at home, use soap sparingly,
divert washwater to landscaped areas and pour your
bucket of soapy water down the sink. Never wash your
car in the street.
Clean up After Your Pets
• Take a bag when you walk your pets and be sure to
always clean up after them. Flush pet waste down the
toilet or dispose of it in a sealed plastic bag and throw it
in the trash.
Buy Non-Toxic Products
• When possible, use non-toxic products for household
cleaning. If you must use a toxic cleaning product, buy
small quantities, use it sparingly and properly dispose of
unused portions. For the Household Hazardous Waste
collection facility nearest you, call 1 -800-CLEANUP.
What is the Storm Water Program?
The City is regulated by a municipal storm water permit
at was issued by the State Water Resources Control
oard. The City's Storm Water Program helps to ensure
compliance with the permit by:
• Inspecting Carlsbad
businesses and requiring
BMPs to prevent pollution
How do I report a storm water violation?
The Storm Water Program operates a hotline and an e-mail
address to receive referrals about storm water pollution and
illegal discharges and to answer questions about storm water
pollution prevention.
Ifyou see someone dumping or washing waste or pollutants
to the street or storm drain, please call the hotline at 602-
2799 or send an email to stormwater@ci.carlsbad.ca.us.
This information is entered into the City's Request for Action
system and is routed to the appropriate person for response.
• Investigating and eliminating
illegal discharges to the storm
water system
• Overseeing and conducting
water quality monitoring
programs
• Educating the public about
ways to prevent storm water
pollution
Are ail discharges to the storm drain illegal?
In the strictest definition, only rain water can legally enter
the storm drain. However, the permit currently allows
some types of discharges into storm drains when BMPs
are used to reduce pollutants. Some examples include:
• Landscape irrigation and lawn watering runoff
• Dechlorinated pool water
• Residential car washing
• Potable water sources
• Foundation drains
• Water line flushing
Where can I get more information?
• Visit the City's website at www.ci.carlsbad.ca.us/
cserv/storm.htmi to view brochures, documents or link
to other water quality websites.
• Call the hotline at 602-2799 to have information sent
to you.
• To view a copy ofthe Permit, please go to
http://www.swrcb.ca.gov/programs/
sd_stormwater.htmi.
What is the City doing to keep our waterways clean?
Significant efforts are being made by City departments to
help keep our waterways clean. A few program activities
are listed below:
• Educating the public and City employees about storm
water pollution prevention through our website,
brochures, publications, workshops and public events
• Inspecting construction sites to ensure that developers are
implementing Best Management Practices
• Implementing Best Management Practices at City facilities
• Conducting industrial and comnnercial inspections to
ensure businesses are aware of and complying with the
storm water program requirements
• Addressing storm water requirements for new
development and significant redevelopment
• Conducting water quality monitoring in the storm drain
system and in our creeks, lagoons and ocean
• Investigating reports of illegal discharges
• Implementing a Watershed Urban Runoff Management
Plan (WURMP) with the County and other North County
cities to protect all of our waterways
Be Part of the Pollution Solution!
Storm Water Hotline: 760-602-2799
Non-stormwater Discharges SC-10
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Lhc till- Hoii^icliold Wiiffi-
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Description
Non-stormwater discharges are those flows that do not consist
entirely of stormwater. Some non-stormwater discharges do not
include pollutants and may be discharged to the storm drain.
These include uncontaminated groundwater and natural springs.
There are also some non-stormwater discharges that typically do
not contain pollutants and may be discharged to the storm drain
wifli conditions. These include car washing, air conditioner
condensate, etc. However there are certain non-stormwater
discharges that pose environmental concern. These discharges
may originate from illegal dumping or from intemal floor drains,
appliances, industrial processes, sinks, and toilets that are
connected to the nearby storm drainage system. These
discharges (which may include: process waste waters, cooling
waters, wash waters, and sanitary wastewater) can carry
substances such as paint, oil, fuel and other automotive fluids,
chemicals and other pollutants into storm drains. They can
generally be detected through a combination of detection and
elimination. The ultimate goal is to effectively eliminate non-
stormwater discharges to the stormwater drainage system
through implementation of measures to detect, correct, and
enforce against illicit connections and illegal discharges of
pollutants on streets and into the storm drain system and creeks.
Approach
Initially the industry must make an assessment of non-
stormwater discharges to detennine which types must be
eliminated or addressed through BMPs. The focus of the
following approach is in the elimination of non-stormwater
discharges.
Objectives
• Cover
• Contain
• Educate
• Reduce/Minimize
• Product Substitution
Targeted Constituents
Sediment
Nutrients
Trash
Bacteria
Oil and Grease
Organics
•
•
•
•
CASQA
California
Stormwater
Ouality
Association
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SC-10 Non-stormwater Discharges
Pollution Prevention
m Ensure that used oil, used antifreeze, and hazardous chemical recychng programs are being
implemented. Encourage litter control.
Suggested Protocols
Recommended Complaint Investigation Equipment
m Field Screening Analysis
pH paper or meter
- Commercial stormwater pollutant screening kit that can detect for reactive phosphorus,
nitrate nitrogen, ammonium nitrogen, specific conductance, and turbidity
- Sample jars
- Sample collection pole
- A tool to remove access hole covers
• Laboratory Analysis
Sample cooler
Ice
- Sample jars and labels
- Chain of custody forms
• Documentation
- Camera
- Notebook
Pens
Notice of Violation forms
- Educational materials
General
m Develop clear protocols and lines of communication for effectively prohibiting non-
stormwater discharges, especially those that are not classified as hazardous. These are often
not responded to as effectively as they need to be.
• Stencil or demarcate storm drains, where applicable, to prevent illegal disposal of pollutants.
Storm drain inlets should have messages such as "Dump No Waste Drains to Stream"
stenciled or demarcated next to them to warn against ignorant or intentional dumping of
pollutants into the storm drainage system.
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• See SC44 Stormwater Drainage Sjrstem Maintenance for additional infonnation.
Illicit Connections
m Locate discharges from the industrial storm drainage system to the municipal storm drain
system through review of "as-built" piping schematics.
• Isolate problem areas and plug illicit discharge points.
• Locate and evaluate all discharges to the industrial storm drain system.
ViisuaZ Inspection and Inventory
m Inventory and inspect each discharge point during dry weather.
• Keep in mind that drainage from a storm event can continue for a day or two following the
end of a storm and groundwater may infiltrate the underground stormwater coflection
system. Also, non-stormwater discharges are often intermittent and may require periodic
inspections.
Review Infield Piping
u A review of the "as-built" piping schematic is a way to determine if there are any connections
to the stormwater collection system.
• Inspect the path of floor drains in older buildings.
Smoke Testing
m Smoke testing of wastewater and stormwater coUection systems is used to detect
connections between the two systems.
• During dry weather the stormwater collection system is filled with smoke and then traced to
sources. The appearance of smoke at the base of a toilet indicates that there may be a
connection between the sanitary and the stormwater system.
Dye Testing
m A dye test can be performed by simply releasing a dye into either your sanitary or process
wastewater system and examining the discharge points from the stormwater collection
system for discoloration.
TV Inspection of Drainage System
m TV Cameras can be employed to visually identify illicit connections to the industrial storm
drainage system.
Illegal Dumping
m Regularly inspect and clean up hot spots and other storm drainage areas where illegal
dumping and disposal occurs.
• On paved surfaces, clean up spills with as little water as possible. Use a rag for small spills, a
damp mop for general cleanup, and absorbent material for larger spills. Ifthe spilled
material is hazardous, then the used cleanup materials are also hazardous and must be sent
to a certified laundry (rags) or disposed of as hazardous waste.
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• Never hose down or bury dry material spills. Sweep up the material and dispose of properly.
•
Use adsorbent materials on small spiUs rather than hosing down the spill. Remove the
adsorbent materials promptly and dispose of properly.
• For larger spills, a private spOl cleanup company or Hazmat team may be necessary.
Once a site has been cleaned:
• Post "No Dumping" signs with a phone number for reporting dumping and disposal.
• Landscaping and beautification efforts of hot spots may also discourage future dumping, as
well as provide open space and increase property values.
• Lighting or barriers may also be needed to discourage future dumping.
• See fact sheet SCii Spill Prevention, Control, and Cleanup,
/nspection
• Regularly inspect and clean up hot spots and other storm drainage areas where illegal
dumping and disposal occurs.
• Conduct field investigations of the industrial storm drain system for potential sources of
non-stormwater discharges.
• Pro-actively conduct investigations of high priority areas. Based on historical data, prioritize
specific geographic areas and/or incident type for pro-active investigations.
Reporting
m A database is useful for defining and tracking the magnitude and location of the problem.
• Report prohibited non-stormwater discharges observed during the course of normal daily
activities so they can be investigated, contained, and cleaned up or eliminated.
• Document that non-stormwater discharges have been eliminated by recording tests
performed, methods used, dates of testing, and any on-site drainage points observed.
• Document and report annually the results of the program.
• Maintain documentation of illicit connection and illegal dumping incidents, including
significant conditionally exempt discharges that are not properly managed.
TVaining
• Training of technical staff in identifying and documenting illegal dumping incidents is
required.
• Consider posting the quick reference table near storm drains to reinforce training.
• Train employees to identify non-stormwater discharges and report discharges to the
appropriate departments.
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Non-stormwater Discharges SC-10
• Educate employees about spill prevention and cleanup.
• Well-trained employees can reduce human errors that lead to accidental releases or spills.
The employee should have the tools and knowledge to immediately begin cleaning up a spill
should one occur. Employees should be familiar with the Spill Prevention Control and
Countermeasure Plan.
• Determine and implement appropriate outreach efforts to reduce non-permissible non-
stormwater discharges.
• Conduct spill response drills annually (if no events occurred to evaluate your plan) in
cooperation with other industries.
• When a responsible party is identified, educate the party on the impacts of his or her actions.
Spill Response and Prevention
m See sen Spill Prevention Control and Cleanup.
Other Considerations
m Many facilities do not have accurate, up-to-date schematic drawings.
Requirements
Costs (including capital and operation & maintenance)
m The primary cost is for staff time and depends on how aggressively a program is
implemented.
• Cost for containment and disposal is borne by the discharger.
• Illicit connections can be difficult to locate especially if there is groundwater infiltration.
• Indoor floor drains may require re-plumbing if cross-connections to storm drains are
detected.
Maintenance (including administrative and stuffing)
m Illegal dumping and illicit connection violations requires technical staff to detect and
investigate them.
Supplemental Information
Further Detail ofthe BMP
Illegal Dumping
u Substances illegally dumped on streets and into the storm drain systems and creeks include
paints, used oil and other automotive fluids, construction debris, chemicals, fresh concrete,
leaves,' grass clippings, and pet wastes. All of these wastes cause stormwater and receiving
water quality problems as well as clog the storm drain system itself
• Establish a system for tracking incidents. The system should be designed to identify the
following:
- Illegal dumping hot spots
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- Types and quantities (in some cases) of wastes
- Patterns in time of occurrence (time of day/night, month, or year)
- Mode of dumping (abandoned containers, "midnight dumping" from moving vehicles,
direct dumping of materials, accidents/spills)
Responsible parties
One ofthe keys to success of reducing or eliminating illegal dumping is increasing the number of
people at the facility who are aware of the problem and who have the tools to at least identify the
incident, if not correct it. Therefore, train field staff to recognize and report the incidents.
What constitutes a "non-stormwater" discharge?
• Non-stormwater discharges to the stormwater collection system may include any water used
directly in the manufacturing process (process wastewater), air conditioning condensate and
coolant, non-contact cooling water, cooling equipment condensate, outdoor secondary
containment water, vehicle and equipment wash water, sink and drinking fountain
wastewater, sanitary wastes, or other wastewaters.
Permit Requirements
u Facilities subject to stormwater permit requirements must include a certification that the
stormwater collection system has been tested or evaluated for the presence of non-
stormwater discharges. The State's General Industrial Stormwater Permit requires that non-
stormwater discharges be eliminated prior to implementation ofthe facility's SWPPP.
Performance Evaluation
m Review annually internal investigation results; assess whether goals were met and what
changes or improvements are necessary.
• Obtain feedback from personnel assigned to respond to, or inspect for, illicit connections
and illegal dumping incidents.
References and Resources
California's Nonpoint Source Program Plan http:/ /www.swrcb.ca.gov/nps/index-html
Clark County Storm Water Pollution Control Manual
http://www.co.clark.wa.us/pubworks/bmpman.pdf
King County Storm Water Pollution Control Manual http://dnr.metrokc.gov/wlr/dss/spcm.htm
Santa ClaraValley Urban Runolf Pollution Prevention Program http://www.scvurppp.org
The Storm Water Managers Resource Center http: / /www.stormwatercenter.net/
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Objectives
• Cover
• Contain
• Educate
• Reduce/Minimize
• Product Substitution
Description
Many activities that occur at an industrial or commercial site
have the potential to cause accidental or illegal spills.
Preparation for accidental or illegal spills, with proper training
and reporting systems implemented, can minimize the discharge
of pollutants to the environment.
Spills and leaks are one of the largest contributors of stonnwater
pollutants. Spill prevention and control plans are applicable to
any site at which hazardous materials are stored or used. An
effective plan should have spill prevention and response
procedures that identify potential spill areas, specify material
handling procedures, describe spill response procedures, and
provide spill clean-up equipment. The plan should take steps to
identify and characterize potential spills, eliminate and reduce
spill potential, respond to spills when they occur in an effort to
prevent pollutants fi-om entering the stormwater drainage
system, and train personnel to prevent and control future spills.
Approach
Pollution Prevention
m Develop procedures to prevent/mitigate spifls to storm drain
systems. Develop and standardize reporting procedures,
containment, storage, and disposal activities, documentation,
and follow-up procedures.
• Develop a Spill Prevention Control and Countermeasure
(SPCC) Plan. The plan should include:
Targeted Constituents
Sediment
Nutrients
Trash
Metels /
Bacteria
Oil and Grease ^
Organics ^
CASQA
California
Stormwater
Ouality
Association
January 2003 California Stormwater BMP Handbook
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SC-11 Spill Prevention^ Control & Cleanup
- Description of the facility, owner and address, activities and chemicals present
- Facility map
- Notification and evacuation procedures
Cleanup instructions
- Identification of responsible departments
- Identify key spill response personnel
• Recycle, reclaim, or reuse materials whenever possible. This will reduce the amount of
process materials that are brought into the facility.
Suggested Protocols (including equipment needs)
Spill Prevention
• Develop procedures to prevent/mitigate spills to storm drain systems. Develop and
standardize reporting procedures, containment, storage, and disposal activities,
documentation, and follow-up procedures.
• If consistent illegal dumping is observed at the facility:
- Post "No Dumping" signs with a phone number for reporting illegal dumping and
disposal. Signs should also indicate fines and penalties applicable for illegal dumping.
- Landscaping and beautification efforts may also discourage illegal dumping.
- Bright lighting and/or entrance barriers may also be needed to discourage illegal
dumping.
• Store and contain liquid materials in such a manner that if the tank is ruptured, the contents
will not discharge, flow, or be washed into the storm drainage system, surface waters, or
groundwater.
• If the liquid is oil, gas, or other material that separates from and floats on water, install a
spill control device (such as a tee section) in the catch basins that collects runoff from the
storage tank area.
• Routine maintenance:
- Place drip pans or absorbent materials beneath all mounted taps, and at all potential
drip and spill locations during filling and unloading of tanks. Any collected liquids or
soiled absorbent materials must be reused/recycled or properly disposed.
- Store and maintain appropriate spill cleanup materials in a location known to all near
the tank storage area; and ensure that employees are familiar with the site's spfll control
plan and/or proper spill cleanup procedures.
- Sweep and clean the storage area monthly if it is paved, do not hose down the area to a
storm drain.
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- Check tanks (and any containment sumps) daily for leaks and spflls. Replace tanks that
are leaking, corroded, or otherwise deteriorating with tanks in good condition. Collect
all spilled liquids and properly dispose of them.
• Label all containers according to their contents (e.g., solvent, gasoline).
• Label hazardous substances regarding the potential hazard (corrosive, radioactive,
flammable, explosive, poisonous).
• Prominently display required labels on transported hazardous and toxic materials (per US
DOT regulations).
• Identify key spill response personnel.
Spill Control and Cleanup Activities
m Follow the Spfll Prevention Control and Countermeasure Plan.
• Clean up leaks and spflls immediately.
• Place a stockpfle of spfll cleanup materials where it will be readily accessible (e.g., near
storage and maintenance areas).
• On paved surfaces, clean up spflls with as little water as possible. Use a rag for small spills, a
damp mop for general cleanup, and absorbent material for larger spills. Ifthe spilled
material is hazardous, then the used cleanup materials are also hazardous and must be sent
to a certified laundry (rags) or disposed of as hazardous waste. Physical methods for the
cleanup of dry chemicals include the use of brooms, shovels, sweepers, or plows.
• Never hose down or bury dry material spflls. Sweep up the material and dispose of properly.
• Chemical cleanups of material can be achieved with the use of adsorbents, gels, and foams.
Use adsorbent materials on small spifls rather than hosing down the spfll. Remove the
adsorbent materials promptly and dispose of properiy.
• For larger spifls, a private spfll cleanup company or Hazmat team may be necessary.
Reporting
m Report spflls that pose an immediate threat to human health or the environment to the
Regional Water Quality Control Board.
• Federal regulations require that any ofl spifl into a water body or onto an adjoining shoreline
be reported to the National Response Center (NRC) at 800-424-8802 (24 hour).
• Report spflls to local agencies, such as the fire department; they can assist in cleanup.
• Establish a system for tracking incidents. The system should be designed to identify the
following:
- Types and quantities (in some cases) of wastes
- Pattems in time of occurrence (time of day/night, month, or year)
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- Mode of dumping (abandoned containers, "midnight dumping" from moving vehicles,
direct dumping of materials, accidents/spUls)
- Responsible parties
Trainingf
• Educate employees about spfll prevention and cleanup.
• WeU-trained employees can reduce human errors that lead to accidental releases or spifls:
- The employee should have the tools and knowledge to immediately begin cleaning up a
spill should one occur.
- Employees should be famfliar with the SpiU Prevention Control and Countermeasure
Plan.
• Employees should be educated about aboveground storage tank requirements. Employees
responsible for aboveground storage tanks and liquid transfers should be thoroughly
familiar with the Spfll Prevention Control and Countermeasure Plan and the plan should be
readily avaflable.
• Train employees to recognize and report iUegal dumping incidents.
Other Considerations (Limitations and Regulations)
m State regulations exist for facflities wifli a storage capacity of 10,000 gallons or more of
petroleum to prepare a SpiU Prevention Control and Countermeasure (SPCC) Plan (Health &
Safety Code Chapter 6.67).
• State regulations also exist for storage of hazardous materials (Health & Safety Code Chapter
6.95), including the preparation of area and business plans for emergency response to the
releases or threatened releases.
• Consider requiring smaller secondary containment areas Oess than 200 sq. ft.) to be
connected to the sanitary sewer, prohibiting any hard connections to the storm drain.
Requirements
Costs (including capital and operation & maintenance)
m WiU vary depending on the size of the facflity and the necessary controls.
• Prevention of leaks and spflls is inexpensive. Treatment and/or disposal of contaminated
sofl or water can be quite expensive.
Maintenance (including euiministrative and sti^ng)
m This BMP has no major administrative or staffing requirements. However, extra time is
needed to properly handle and dispose of spiUs, which results in increased labor costs.
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Supplemental Information
Further Detail ofthe BMP
Reporting
Record keeping and internal reporting represent good operating practices because they can
increase the efficiency of the facflity and the effectiveness of BMPs. A good record keeping
system helps the facflity minimize incident recurrence, correctly respond with appropriate
cleanup activities, and comply with legal requirements. A record keeping and reporting system
should be set up for documenting spiUs, leaks, and other discharges, including discharges of
hazardous substances in reportable quantities. Incident records describe the quality and
quantity of non-stormwater discharges to the storm sewer. These records should contain the
following information:
• Date and time of the incident
• Weather conditions
• Duration of the spiU/leak/discharge
• Cause of the spiU/leak/discharge
• Response procedures implemented
• Persons notified
• Environmental problems associated with the spfll/leak/discharge
Separate record keeping systems should be estabUshed to document housekeeping and
preventive maintenance inspections, and training activities. All housekeeping and preventive
maintenance inspections should be documented. Inspection documentation should contain the
following information:
• The date and time the inspection was performed
• Name of the inspector
• Items inspected
• Problems noted
• Corrective action required
• Date corrective action was taken
Other means to document and record inspection results are field notes, timed and dated
photographs, videotapes, and drawings and maps.
Aboveground Tank Leak and Spill Control
Accidental releases of materials from aboveground liquid storage tanks present the potential for
contaminating stormwater with many different poUutants. Materials spiUed, leaked, or lost ii-om
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tanks may accumulate in sofls or on impervious surfaces and be carried away by stormwater
ranoff.
The most common causes of unintentional releases are:
• Installation problems
• Faflure of piping systems (pipes, pumps, flanges, couplings, hoses, and valves)
• External conosion and structural failure
• SpiUs and overfills due to operator enor
• Leaks during pumping of liquids or gases from tmck or rafl car to a storage tank or vice versa
Storage of reactive, ignitable, or flammable Uquids should comply with the Uniform Fire Code
and the National Electric Code. Practices listed below should be employed to enhance the code
requirements:
• Tanks should be placed in a designated area.
• Tanks located in areas where firearms are discharged should be encapsulated in concrete or
the equivalent.
• Designated areas should be impervious and paved with Portland cement concrete, free of
cracte and gaps, in order to contain leaks and spiUs.
• Liquid materials should be stored in UL approved double walled tanks or sunounded by a
curb or dike to provide the volume to contain lo percent of the volume of aU of the
containers or no percent of the volume of the largest container, whichever is greater. The
area inside the curb should slope to a drain.
• For used ofl or dangerous waste, a dead-end sump should be instaUed in the drain.
• All other Uquids should be drained to the sanitary sewer if avaflable. The drain must have a
positive control such as a lock, valve, or plug to prevent release of contaminated Uquids.
• Accumulated stormwater in petroleum storage areas should be passed through an oil/water
separator.
Maintenance is critical to preventing leaks and spiUs. Conduct routine inspections and:
• Check for extemal corrosion and structural failure.
• Check for spiUs and overfiUs due to operator error.
• Check for faflure of piping system (pipes, pumps, flanger, coupling, hoses, and valves).
• Check for leaks or spflls during pumping of liquids or gases from truck or rafl car to a storage
facility or vice versa.
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• Visually inspect new tank or container instaUation for loose fittings, poor welding, and
improper or poorly fitted gaskets.
• Inspect tank foundations, connections, coatings, and tank waUs and piping system. Look for
corrosion, leaks, cracks, scratches, and other physical damage that may weaken the tank or
container system.
> Frequentiy relocate accumulated stormwater during the wet season.
• Periodically conduct integrity testing by a qualified professional.
Vehicle Leak and Spill Control
Major spflls on roadways and other public areas are generaUy handled by highly trained Hazmat
teams from local fire departments or environmental health departments. The measures listed
below pertain to leaks and smaUer spiUs at vehicle maintenance shops.
In addition to implementing the spfll prevention, control, and clean up practices above, use the
following measures related to specific activities:
Vehicle and Equipment Maintenance
• Perform aU vehicle fluid removal or changing inside or under cover to prevent the ran-on of
stormwater and the runoff of spflls.
• Regularly inspect vehicles and equipment for leaks, and repair immediately.
• Check incoming vehicles and equipment (including delivery tracks, and employee and
subcontractor vehicles) for leaking ofl and fluids. Do not allow leaking vehicles or equipment
onsite.
• Always use secondary containment, such as a drain pan or drop cloth, to catch spiUs or leaks
when removing or changing fluids.
• Immediately drain aU fluids from wrecked vehicles.
• Store wrecked vehicles or damaged equipment under cover.
• Place drip pans or absorbent materials under heavy equipment when not in use.
• Use adsorbent materials on smaU spflls rather than hosing down the spiU.
• Remove the adsorbent materials promptly and dispose of properly.
• Promptly transfer used fluids to the proper waste or recycUng drums. Don't leave fiiU drip
pans or other open containers lying around.
• OU filters disposed of in trashcans or dumpsters can leak ofl and contaminate stormwater.
Place the ofl filter in a funnel over a waste ofl recycling drum to drain excess ofl before
disposal. Ofl fflters can also be recycled. Ask your ofl supplier or recycler about recycling oil
filters.
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• Store cracked batteries in a non-leaking secondary container. Do this with aU cracked
batteries, even if you think aU the acid has drained out. If you drop a battery, treat it as if it is
cracked. Put it into the containment area until you are sure it is not leaking.
Vehicle and Equipment Fueling
m Design the fueling area to prevent the ran-on of stormwater and the runoff of spflls:
- Cover fueling area if possible.
Use a perimeter drain or slope pavement inward with drainage to a sump.
- Pave fueling area with concrete rather than asphalt.
• If dead-end sump is not used to coUect spflls, instaU an oil/water separator.
• Install vapor recovery nozzles to help control drips as weU as air pollution.
• Discourage "topping-off of fuel tanks.
• Use secondary containment when transferring fuel from the tank truck to the fuel tank.
• Use adsorbent materials on smaU spflls and general cleaning rather than hosing down the
area. Remove the adsorbent materials promptly.
• Carry out all Federal and State requirements regarding underground storage tanks, or install
above ground tanks.
• Do not use mobfle fueling of mobile industrial equipment around the facility; rather,
transport the equipment to designated fueling areas.
• Keep your SpiU Prevention Control and Countermeasure (SPCC) Plan up-to-date.
• Train employees in proper fiieling and cleanup procedures.
Industrial Spill Prevention Response
For the purposes of developing a spfll prevention and response program to meet the stormwater
regulations, facUity managers should use information provided in this fact sheet and the spiU
prevention/response portions of the fact sheets in this handbook, for specific activities. The
program should:
• Integrate with existing emergency response/hazardous materials programs (e.g.. Fire
Department)
• Develop procedures to prevent/mitigate spiUs to storm drain systems
• Identify responsible departments
• Develop and standardize reporting procedures, containment, storage, and disposal activities,
documentation, and foUow-up procedures
• Address spiUs at municipal facflities, as weU as public areas
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Spill Prevention^ Control & Cleanup SC-11
• Provide training concerning spiU prevention, response and cleanup to aU appropriate
personnel
References and Resources
California's Nonpoint Source Program Plan http://www.swrcb.ca.gov/nps/index.html
Clark County Storm Water PoUution Control Manual
http://www.co.clark.wa.us/pubworks/bmpman.pdf
King County Storm Water PoUution Control Manual http://dnr.metrokc.gov/wlr/dss/spcm.htm
Santa Clara VaUey Urban Runoff PoUution Prevention Program http://www.scvurppp.org
The Stormwater Managers Resource Center http: / /www.stormwatercenter.net/
January 2003 California Stormwater BMP Handbook 9 of 9
Industrial and Commercial
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Building & Grounds Maintenance SC-41
Objectives
• Cover
• Contein
• Educate
• Reduce/Minimize
• Product Substitution
Targeted Constituents
Description
Stormwater runoff fi-om buflding and grounds maintenance
activities can be contaminated with toxic hydrocarbons in
solvents, fertilizers and pesticides, suspended soUds, heavy
metals, abnormal pH, and ofls and greases. Utflizing the
protocols in this fact sheet wiU prevent or reduce the discharge of
poUutants to stormwater from building and grounds
maintenance activities by washing and cleaning up with as little
water as possible, following good landscape management
practices, preventing and cleaning up spiUs immediately, keeping
debris from entering the storm drains, and maintaining the
stonnwater collection system.
Approach
Reduce potential for pollutant discharge through source control
poUution prevention and BMP implementation. Successful
implementation depends on effective training of employees on
applicable BMPs and general pollution prevention strategies and
objectives.
Pollution Prevention
m Switch to non-toxic chemicals for maintenance when
possible.
• Choose cleaning agents that can be recycled.
• Encourage proper lawn management and landscaping,
including use of native vegetation.
Sediment
Nutrients
Trash
Metels
Bacteria
Oil and Grease
Organics
•
•
•
CASQA
California
Stormwater
Ouality
Association
January 2003 California Stormwater BMP Handbook
Industrial and Commercial
www.cabmphandbooks.com
1 of 5
SC-41 Building & Grounds Maintenance
• Encourage use of Integrated Pest Management techniques for pest control.
• Encourage proper onsite recycling of yard trimmings.
• Recycle residual paints, solvents, lumber, and other material as much as possible.
Suggested Protocols
Pressure Washing of Buildings, Rooftops, and Other Large Objects
• In situations where soaps or detergents are used and the surrounding area is paved, pressure
washers must use a water coUection device that enables collection of wash water and
associated solids. A sump pump, wet vacuum or similarly effective device must be used to
coUect the ranoff and loose materials. The collected ranoff and solids must be disposed of
properly.
• If soaps or detergents are not used, and the surrounding area is paved, wash ranoff does not
have to be coUected but must be screened. Pressure washers must use fflter fabric or some
other type of screen on the ground and/or in the catch basin to trap the particles in wash
water ranoff.
• If you are pressure washing on a grassed area (with or without soap), runoff must be
dispersed as sheet flow as much as possible, rather than as a concentrated stream. The wash
runoff must remain on the grass and not drain to pavement.
Landscaping Activities
m Dispose of grass clippings, leaves, sticks, or other coUected vegetation as garbage, or by
composting. Do not dispose of collected vegetation into waterways or storm drainage
systems.
• Use mulch or other erosion control measures on exposed soils.
Building Repair, Remodeling, and Construction
u Do not dump any toxic substance or Uquid waste on the pavement, the ground, or toward a
storm drain.
• Use ground or drop cloths undemeath outdoor painting, scraping, and sandblasting work,
and properly dispose of collected material daily.
• Use a ground cloth or oversized tub for activities such as paint mixing and tool cleaning.
• Clean paintbrushes and tools covered with water-based paints in sinks connected to sanitary
sewers or in portable containers that can be dumped into a sanitary sewer drain. Brashes
and tools covered with non-water-based paints, finishes, or other materials must be cleaned
in a manner that enables collection of used solvents (e.g., paint thinner, turpentine, etc.) for
recycling or proper disposal.
• Use a storm drain cover, filter fabric, or simUarly effective ranoff control mechanism if dust,
grit, wash water, or other poUutants may escape the work area and enter a catch basin. This
is particularly necessary on rainy days. The containment device(s) must be in place at the
beginning ofthe work day, and accumulated dirty ranoff and solids must be coUected and
disposed of before removing the containment device(s) at the end of the work day.
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Building & Grounds Maintenance SC-41
• If you need to de-water an excavation site, you may need to filter the water before
discharging to a catch basin or off-site. If directed off-site, you should direct the water
through hay bales and filter fabric or use other sediment filters or traps.
• Store toxic material under cover during precipitation events and when not in use. A cover
would include tarps or other temporary cover material.
Mowing, Trimming, and Planting
m Dispose of leaves, sticks, or other coUected vegetation as garbage, by composting or at a
permitted landfiU. Do not dispose of collected vegetation into waterways or storm drainage
sjrstems.
• Use mulch or other erosion control measures when sofls are exposed.
• Place temporarfly stockpfled material away from watercourses and drain inlets, and berm or
cover stockpiles to prevent material releases to the storm drain system.
• Consider an alternative approach when bailing out muddy water: do not put it in the storm
drain; pour over landscaped areas.
• Use hand weeding where practical.
Fertilizer and Pesticide Management
m FoUow aU federal, state, and local laws and regulations governing the use, storage, and
disposal of fertilizers and pesticides and training of applicators and pest control advisors.
• Use less toxic pesticides that wiU do the job when applicable. Avoid use of copper-based
pesticides if possible.
• Do not use pesticides if rain is expected.
• Do not mix or prepare pesticides for application near storm drains.
• Use the minimum amount needed for the job.
• Calibrate fertflizer distributors to avoid excessive application.
• Employ techniques to minimize off-target application (e.g., spray drift) of pesticides,
including consideration of alternative application techniques.
• Apply pesticides only when wind speeds are low.
• Fertilizers should be worked into the sofl rather than dumped or broadcast onto the surface.
• Irrigate slowly to prevent ranoff and then only as much as is needed.
• Clean pavement and sidewalk if fertflizer is spiUed on these surfaces before applying
irrigation water.
• Dispose of empty pesticide containers according to the instructions on the container label.
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SC-41 Building & Grounds Maintenance
• Use up the pesticides. Rinse containers, and use rinse water as product. Dispose of unused
pesticide as hazardous waste.
• Implement storage requirements for pesticide products with guidance from the local fire
department and County Agricultural Commissioner. Provide secondary containment for
pesticides.
Inspecfion
• Inspect irrigation sj^tem periodically to ensure that the right amount of water is being
applied and that excessive runoff is not occuning. Minimize excess watering and repair
leaks in the irrigation system as soon as they are observed.
TVaining
• Educate and train employees on pesticide use and in pesticide application techniques to
prevent pollution.
• Train employees and contractors in proper techniques for spiU containment and cleanup.
• Be sure the frequency of training takes into account the complexity of the operations and the
nature of the staff.
^iZI Response and Prevention
m Keep your SpiU Prevention Control and Countermeasure (SPCC) Plan up-to-date.
• Place a stockpfle of spfll cleanup materials, such as brooms, dustpans, and vacuum sweepers
(if desired) near the storage area where it wfll be readfly accessible.
• Have employees trained in spiU containment and cleanup present during the
loading/unloading of dangerous wastes, Uquid chemicals, or other materials.
• Famfliarize employees with the SpiU Prevention Control and Countermeasure Plan.
• Clean up spflls immediately.
Other Considerations
Alternative pest/weed controls may not be avaflable, suitable, or effective in many cases.
Requirements
Costs
• Cost wiU vary depending on the t5^e and size of facflity.
• OveraU costs should be low in comparison to other BMPs.
Maintenance
Sweep paved areas regularly to coUect loose particles. Wipe up spiUs -with rags and other
absorbent material immediately, do not hose down the area to a storm drain.
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Building & Grounds Maintenance SC-41
Supplemental Information
Further Detail ofthe BMP
Fire Sprinkler Line Flushing
Buflding fire sprinkler line flushing may be a source of non-stormwater ranoff pollution. The
water entering the system is usually potable water, though in some areas it may be non-potable
reclaimed wastewater. There are subsequent factors that may drastically reduce the quality of
the water in such systems. Black iron pipe is usually used since it is cheaper than potable
piping, but it is subject to rusting and results in lower quality water. Initially, the black iron pipe
has an oil coating to protect it from rasting between manufacture and installation; this will
contaminate the water from the first flush but not from subsequent flushes. Nitrates, poly-
phosphates and other conosion inhibitors, as weU as fire suppressants and antifreeze may be
added to the sprinkler water system. Water generally remains in the sprinkler system a long
time (typically a year) and between flushes may accumulate iron, manganese, lead, copper,
nickel, and zinc. The water generally becomes anoxic and contains living and dead bacteria and
breakdown products from chlorination. This may result in a significant BOD problem and the
water often smells. Consequently dispose fire sprinkler line flush water into the sanitary sewer.
Do not allow discharge to storm drain or infiltration due to potential high levels of poUutants in
fire sprinkler line water.
References and Resources
California's Nonpoint Source Program Plan http://www.swrcb.ca.gov/nps/index.html
Clark County Storm Water PoUution Control Manual
http: / /www.co.clark.wa.us /pubworks /bmpman.pdf
King County Storm Water Pollution Control Manual http://dnr.metrokc.gov/wlr/dss/spcm.htm
Mobfle Cleaners Pflot Program: Final Report. 1997. Bay Area Stormwater Management
Agencies Association (BASMAA). http: / /www.basmaa.org/
Pollution from Surface Cleaning Folder. 1996. Bay Area Stormwater Management Agencies
Association (BASMAA). http://www.basmaa.org/
Santa Clara Valley Urban Runoff PoUution Prevention Program http: / /www.scvurppp.org
The Storm Water Managers Resource Center http://www.stormwatercenter.net/
January 2003 California Stormwater BMP Handbook 5 of 5
Industrial and Commercial
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Parking/Storage Area Maintenance SC-43
Description
Parking lots and storage areas can contribute a number of
substances, such as trash, suspended solids, hydrocarbons, oil
and grease, and heavy metals that can enter receiving waters
through stormwater ranoff or non-stormwater discharges. The
protocols in this fact sheet are intended to prevent or reduce the
discharge of pollutants from parking/storage areas and include
using good housekeeping practices, following appropriate
cleaning BMPs, and training employees.
Approach
The goal of this program is to ensure stormwater poUution
prevention practices are considered when conducting activities
on or around parking areas and storage areas to reduce potential
for pollutant discharge to receiving waters. Successful
implementation depends on effective training of employees on
applicable BMPs and general pollution prevention strategies and
objectives.
Pollution Prevention
• Encourage alternative designs and maintenance strategies for
impervious parking lots. (See New Development and
Redevelopment BMP Handbook)
• Keep accurate maintenance logs to evaluate BMP
implementation.
Objectives
Cover
Contain
Educate
Reduce/Minimize
Product Substitution
Targeted Constituents
Sediment ^
Nutrients
Trash y
Metals y
Bacteria
Oil and Grease ^
Organics ^
CASQA
California
Stormwater
Quailly
Association
January 2003 California Stormwater BMP Handbook
Industrial and Commercial
www.cabmphandbooks.com
1 of 4
SC-43 Parking/Storage Area Maintenance
Suggested Protocols
General
• Keep the parking and storage areas clean and orderly. Remove debris in a timely fashion.
• Allow sheet ranoff to flow into biofilters (vegetated strip and swale) and/or infiltration
devices.
• Utilize sand filters or oleophflic coUectors for oily waste in low quantities.
• Arrange rooftop drains to prevent drainage directly onto paved surfaces.
• Design lot to include semi-permeable hardscape.
• Discharge soapy water remaining in mop or wash buckets to the sanitary sewer through a
sink, toilet, clean-out, or wash area with drain.
Controlling Litter
• Post "No Littering" signs and enforce anti-litter laws.
• Provide an adequate number of litter receptacles.
• Clean out and cover litter receptacles frequently to prevent spillage.
• Provide trash receptacles in parking lots to discourage litter.
• Routinely sweep, shovel, and dispose of litter in the trash.
Surface Cleaning
• Use dry cleaning methods (e.g., sweeping, vacuuming) to prevent the discharge of pollutants
into the stormwater conveyance system if possible.
• Establish frequency of pubUc parking lot sweeping based on usage and field observations of
waste accumulation.
• Sweep all parking lots at least once before the onset of the wet season.
• Follow the procedures below if water is used to clean surfaces:
- Block the storm drain or contain ranoff.
- Collect and pump wash water to the sanitary sewer or discharge to a pervious surface.
Do not aUow wash water to enter storm drains.
- Dispose of parking lot sweeping debris and dirt at a landfiU.
• Follow the procedures below when cleaning heavy oily deposits:
- Clean oily spots with absorbent materials.
- Use a screen or filter fabric over inlet, then wash surfaces.
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Parking/Storage Area Maintenance SC-43
- Do not allow discharges to the storm drain.
- Vacuum/pump discharges to a tank or discharge to sanitary sewer.
- Appropriately dispose of spilled materials and absorbents.
Surface Repair
• Preheat, transfer or load hot bituminous material away from storm drain inlets.
• Apply concrete, asphalt, and seal coat during dry weather to prevent contamination from
contacting stormwater runoff.
• Cover and seal nearby storm drain inlets where appUcable (with waterproof material or
mesh) and manholes before applying sed coat, slurry seal, etc. Leave covers in place untU
job is complete and all water from emulsified oU sealants has drained or evaporated. Clean
any debris from these covered manholes and drains for proper disposal.
• Use only as much water as necessary for dust control, to avoid ranoff.
• Catch drips from paving equipment that is not in use with pans or absorbent material placed
under the machines. Dispose of collected material and absorbents properly.
Jnspecrion
• Have designated personnel conduct inspections of parking facilities and stonnwater
conveyance systems associated with parking facilities on a regular basis.
• Inspect cleaning equipment/sweepers for leaks on a regular basis.
TVaining
• Provide regular training to field employees and/ or contractors regarding cleaning of paved
areas and proper operation of equipment.
• Train employees and contractors in proper techniques for spiU containment and cleanup.
Spill Response and Prevention
m Keep your Spill Prevention Control and Countermeasure (SPCC) Plan up-to-date.
• Place a stockpfle of spill cleanup materials where it will be readily accessible or at a central
location.
• Clean up fluid spills immediately with absorbent rags or material.
• Dispose of spilled material and absorbents properly.
Other Considerations
Limitations related to sweeping activities at large parking facflities may include high equipment
costs, the need for sweeper operator training, and the inabflity of current sweeper technology to
remove oil and grease.
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SC-43 Parking/Storage Area Maintenance
Requirements
Costs
Cleaning/sweeping costs can be quite large. Constraction and maintenance of stormwater
stractural controls can be quite expensive as weU.
Maintenance
• Sweep parking lot regularly to minimize cleaning with water.
• Clean out oU/water/sand separators regularly, especially after heavy storms.
• Clean parking facilities regularly to prevent accumulated wastes and pollutants from being
discharged into conveyance systems during rainy conditions.
Supplemental Information
Further Detail ofthe BMP
Surface Repair
Apply concrete, asphalt, and seal coat during dry weather to prevent contamination from
contacting stormwater ranoff. Where applicable, cover and seal nearby storm drain inlets (with
waterproof material or mesh) and manholes before applying seal coat, slurry seal, etc. Leave
covers in place until job is complete and all water from emulsified oU sealants has drained or
evaporated. Clean any debris from these covered manholes and drains for proper disposal.
Only use only as much water as is necessary for dust control to avoid ranoff.
References and Resources
California's Nonpoint Source Program Plan http://www.swrcb.ca.gov/nps/index.html
Clark County Storm Water Pollution Control Manual
http://www.co.clark.wa.us/pubworks/bmpman.pdf
King County Storm Water Pollution Control Manual http://dnr.metrokc.gov/wlr/dss/spcm.htm
PoUution from Surface Cleaning Folder. 1996. Bay Area Stormwater Management Agencies
Association (BASMAA). http://www.basmaa.org/
Oregon Association of Clean Water Agencies. Oregon Municipal Stormwater Toolbox for
Maintenance Practices. June 1998.
Santa Clara Valley Urban Runoff Pollution Prevention Program http://www.scvurppp.org
The Storm Water Managers Resource Center http://www.stormwatercenter.net/
4 of 4 California Stormwater BMP Handbook January 2003
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Site Design & Landscape Planning SD-10
Design Objectives
•
•
Maximize Infiltration
Provide Retention
Slow Runoff
Minimize Impenrious Land
Coverage
Prohibit Dumping of Improper
Contein Pollutents
Collect and Convey
Description
Each project site possesses unique topographic, hydrologic, and vegetative features, some of
which are more suitable for development than others. Integrating and incorporating
appropriate landscape planning 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 suitability 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 Appiications
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.
;c A S Q A
California
Stormwater
Quality
Association
January 2003 California Stormwater BMP Handbook
New Development and Redevelopment
www.cabmphandbooks.com
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 suitabUity for urban uses. Include the following landscape features in
the assessment: wooded land, open unwooded land, steep slopes, erosion-prone soils,
foundation suitabUity, soU suitabUity for waste disposal, aquifers, aquifer recharge areas,
wetiands, floodplains, surface waters, agricultural lands, and various categories of urban
land use. When appropriate, the assessment can highlight 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.
Project plan designs shoifld 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:
• Cluster development on least-sensitive portions of a site whfle leaving the remaining land in
a natural undisturbed condition.
• 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.
• 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
interception storage, detention in the organic forest floor layer, and water losses by
evapotranspiration, resulting in large peak ranoff increases and either their negative effects
or the expense of countering them with structural solutions.
• Maintain natural storage reservoirs and drainage corridors, including depressions, areas of
permeable soils, swales, and intermittent streams. Develop and implement policies and
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Site Design & Landscape Planning SD-10
regulations to discourage the clearing, filling, and channelization of these features. Utflize
them in drainage networks in preference to pipes, culverts, and engineered ditches.
• Evaluating infUtration 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
facflities to fafl. 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.
• StabUize 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 ran-off velocity and frequency caused bythe project do not erode the channel.
• InstaU 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 tributary impervious area. The first choice for linings
should be grass or some other vegetative surlface, 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 detennine
whether or not the requirements for new development apply to areas intended for
redevelopment. Ifthe definition applies, the steps outlined under "designing new installations"
above should be foUowed.
January 2003 California Stormwater BMP Handbook 3 of 4
New Development and Redevelopment
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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. WhUe some site constraints may exist due to the status
of already existing infrastmcture, opportunities should not be missed to maximize infUtration,
slow ranoff, 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 Western 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, 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 February 2003.
Ventura Count5rwide Technical Guidance Manual for Stormwater Quality Control Measures,
July 2002.
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Efficient Irrigation SD-12
Design Objectives
</ Maximize Infiltration
y Provide Retention
y Slow Runoff
Minimize Impen/ious Land
Coverage
Prohibit Dumping of Improper
Materials
Contein Pollutents
Collect and Convey
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 tiiat minimize ranoff of excess imgation water into the stormwater conveyance
system.
Suitable Applications
Appropriate appUcations include residential, commercial and industrial areas planned for
development or redevelopment. (Detached residential single-famfly homes are typically
excluded from this requirement.)
Design Considerations
Designing New Installations
The foUowing methods to reduce excessive inigation ranoff 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 inigation 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. AS^AC A S Q A
California
Stormwater
Quality
Association
January 2003 California Stormwater BMP Handbook
New Development and Redevelopment
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SD-12 Efficient Irrigation
• Design timing and application methods of irrigation water to minimize the runoff of excess
irrigation water into fhe storm water drainage system.
• Group plants with simflar water requirements in order to reduce excess inigation 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 runoff
- 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 ranoff.
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 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 outiined 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.
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
Control District, and the Incorporated Cities of Orange County, Draft Febraary 2003.
Ventura Countywide Technical Guidance Manual for Stormwater Quality Control Measures,
July 2002.
2 of 2 California stormwater BMP Handbook January 2003
New Deveiopment and Redevelopment
www.cabmphandbooks.com