HomeMy WebLinkAboutCT 05-09; BRESSI RANCH LOTS 33-39; STORM WATER MANAGEMENT PLAN; 2006-06-02.(
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Prepared By
Partners Planning and Engineering
STORM WATER MANAGEMENT PLAN
FOR
BRESSI RANCH LOTS 33-39
City of Carlsbad
DWG No. 442-5A
PROJECT No. PIP 05-06/CT 05-09
Prepared By
Partners Planning and Engineering
15938 Bernardo Center Drive
San Diego, CA 92127
For
Spectrum Flex, LLC
4350 Executive Drive, suite 301
San Diego, CA 92121
June 2, 2006
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I TABLE OF CONTENTS
I INTRODUCTION
1. Project Description ........................................................................................... .
I 1.1. Hydrologic Unit Contribution .................................................................. .
1.2. Beneficial Use ............................................................................................. .
I 1.2.1. Inland Surface Waters ................................................................. .
1.2.2. Groundwater ................................................................................. .
I 2. CHARACTERIZATION OF PROJECT RUNOFF ..................................... .
2.1. Expected Pollutants from the Project Area ............................................ .
I 2.2. Pollutants of Concern ............................................................................... .
2.3. Conditions of Concern .............................................................................. .
I 3. MITIGATION MEASURES TO PROTECT WATER QUALITY
3.1. Construction BMPs ................................................................................... .
I 3.2. Post-construction BMPs ........................................................................... .
3.2.1. Site Design BMPs ............................................................................ .
I 3.2.2. Source Control BMPs .................................................................... .
3.2.3. Treatment Control .......................................................................... .
I 3.2.3.1. Fossil Filter™ Storm Water Filtration System ............... .
I
3.2.3.2. Biofilters (Vegetated Swales) •.••.•....••••....•..•.......•.•.•..•.•...•
3.2.3.3. Coanda Downspout Filter ............................................... .
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3.2.4. Target Pollutants and Proposed BMPs ........................................ .
4. OPERATION AND MAINTENANCE PROGRAM .................................. ...
I 4.1. Source Control BMPs ............................................................................... .
4.1.1 Hazardous Material Storage ........................................................ ..
I 4.1.2 Trash Storage .................................................................................. .
4.1.3 Efficient Irrigation System ............................................................ .
I 4.1.4 Inlet / Catch Basin Tiles ................................................................. .
4.1.5 Good Housekeeping ........................................................................ .
I 4.2 Treatment Control BMPs ........................................................................ .
4.2.1 Fossil Filter™ Storm Water Filtration System ............................. .
I 4.2.2 Coanda Downspout Filters ........................................................... .
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5.0 Fiscal ResoD rces .......................................................................................... .
6.0 Conclusions ................................................................................................. .
, ATTACHMENTS
A. Vicinity Map
B. Project Map
C. Calculations
D. Appendix
E. Operation and Maintenance Plan
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INTRODUCTION
The Storm Water Management Plan (SWMP) requirement is required under the City of
Carlsbad's Storm Water Management and Discharge Control Ordinance. The purpose of this
SWMP is to address the water quality impacts from the proposed development of Bressi Ranch
Lots 33-39 in the City of Carlsbad. Best Management Practices (BMPs) will be utilized to
provide a long-term solution to water quality. This SWMP is also intended to ensure the
effectiveness of the BMPs through proper maintenance that is based on long-term fiscal
planning.
Determine Priority Pro.ject Permanent Storm Water BMP Requirements YES NO
1. Detached residential development of 10 or more units X
2. Attached residential development of 10 or more untis X
3. Commercial development greater than 100,000 square feet X
4. Automotive repair shop X
5. Restaurant \;;; X
6. steep hillside development greater than 5,000 square feet X
7. project discharging to receiving waters within Environmentally Sensitive X
Areas
8. parking lots greater than or equal to 5,000 ft" or with at least 15 parking X
spaces, and potentially exposed to urban runoff
9. streets, roads, highways, and freeways which create a new paved surface X
that is 5,000 square feet or greater
1. PROJECT DESCRIPTION
The proposed development includes eight (8) office buildings with associated parking,
landscaping and hardscape. The project site is located east ofEl Camino Real and south of
Palomar AirpOli Road. Access to the site occurs off of East Loker Avenue. See Attachment 'A'
for Vicinity Map.
1.1 Hydrologic Unit Contribution
Bressi Ranch Lots 33-39 is located in the Batiquitos Lagoon Hdyrologic Subarea of the San
Marcos Creek Watershed Hydrologic Area (HSA 904.51) of the Carlsbad Hydrologic Unit. The
project site is currently vacant consisting of a mass graded pad. Runoff developed on site
currently sheet flows from the northeast to the southwest to the existing desiltation basins. The
runoff is then conveyed via the existing public storm drain system to Batiquitos Lagoon. The
proposed development will not significantly affect the current drainage pattern. The existing
condition generates 20.9 cfs per the mass graded plans prepared by Project Design Consultants
for the 100-year storm. The proposed developed site generates 36.31 cfs for the 1 OO-year storm.
The mass graded plans prepared by Project Design Consultants calculates the ultimate allowable
flow off of the site to be 55.4 cfs. See Attachment C for calculations.
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1.2 Beneficial Uses
The beneficial uses for the hydrologic unit are included in Tables 1.1 and 1.2. These tables have
been extracted from the Water Quality Control Plan for the San Diego Basin.
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.
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
grazmg.
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.
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 the uses of water for recreation 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.
BIOL -Preservation of Biological Habitats of Special Significance: Designated areas or
habitats such as established refuges, parks, sanctuaries, ecological reserves, or Areas of Special
Biological Significance (ASBS), where the preservation or enhancement of natural resources
requires special protection.
EST -Estuarine Habitat: 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.
WILD -Wildlife Habitat: Includes uses of water that support terrestrial ecosystems including,
but not limited to, preservation and enhancement of terrestrial habitats, vegetation, wildlife, (e.g.,
mammals, birds, reptiles, amphibians, invertebrates), or wildlife water and food sources.
RARE -Rare, Threatened, or Endangered Species: Includes uses of water that suppOli
habitats necessary, at least in part, for the survival and successful maintenance of plant and
animal species established under state or federal law as rare, threatened, or endangered.
MAR -Marine Habitat: 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).
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MIGR -Migration of Aquatic Organisms: 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: High quality habitats suitable
for reproduction and early development of fish. This use is applicable only for the protection of
anadromous fish.
1.2.1 Inland Surface Waters
Coastal waters have the following beneficial uses as shown on table 1.1
Table 1.1 Beneficial Uses of Coastal Waters
Hydrologic MUN AGR IND RECI REC2 WARM WILD
Unit
Number
904.51 x x x x x x x
1.2.2 Groundwater
Existing beneficial uses of groundwater for the project site in the Carlsbad Hydrologic Unit
(904.51) includes municipal and domestic supply, agricultural supply and industrial service
supply. None of these beneficial uses will be impaired or diminished due to the construction and
operation of this project.
Table 1.2 Beneficial Uses for Groundwater
Hydrologic MUN AGR
Unit Number
904.51 X
* Excepted from Municipal
x Existing Beneficial Use
o Potential Beneficial Use
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X
IND
X
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2. CHARACTERIZATION OF PROJECT RUNOFF
Runoff developed on site currently sheet flows fi·om the northeast to the southwest to the existing
desiltation basins located throughout the site. The runoff is then conveyed via the existing public
storm drain system to Batiquitos Lagoon. The proposed development will not significantly
affect the current drainage pattern. Surface runoff from the developed site will be directed to
either curb inlets or grated catch basins fitted with the Fossil Filtel:'M Storm Water Filtration
System and then pass thru grass-lined swales for water quality purposes. Table 2.1 identifies the
hydrologic/hydraulic characteristics for each basin. See Attachment 'B' for project BMP map.
See Attachment 'C' for calculations.
Table 2:1
BASIN Total Tc QIOO QWQ*
Area
Mass Graded Condition per 14.5 -20.90 cfs -
Project Design Consultants Plans AC
Ultimate Condition per Project 14.5 -55.40 cfs -
Design Consultants' Plans AC
Developed Condition Per Partners 14.5 -36.31 cfs 1.93 cfs
Planning and Engineering Plans AC
* Based on 85 % percentile storm with 1=0.2 in/hr
2.1 Expected Discharges
There was no sampling data available for the existing site condition. In addition, the project is
not expected to generate significant amounts of non-visible pollutants. However, the following
constituents are commonly found on similar developments from parking lot as identified in Table
2 of the City of Carlsbad's Standard Urban Storm Water Mitigation Plan:
• Sediment discharge due to construction activities.
• Nutrients from fertilizers.
• Heavy metals from parked cars.
• Trash and debris.
• Oxygen demanding substances from landscaping and fertilizers.
• Oil and grease from parked cars.
• Pesticides from landscaping.
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2.2 Pollutants of Concern
According to the California 2002 303d list published by the San Diego Regional Water Quality
Control Board, the only currently listed impaired water body associated with the Carlsbad
Hydrologic Unit (HSA 904.51) is the San Marcos Creek Watershed which is listed for DOE,
Phosphorus and Sediment Toxicity. No other water bodies are listed under the Carlsbad
Hydrologic Unit (HAS 904.5 I).
2.3 Conditions of Concern
Common impacts to the hydrologic regime resulting from similar developments include
increased runoff volume and velocity; reduced infiltration; increased flow fi:equency, duration
and peaks; faster time to reach peak flow; and water quality degradation. In order to ~nitigate
these impacts, Spectrum Flex, LLC proposes to direct all surface runoff generated within the
impervious areas through grass-lined trapezoidal channels designed at a slope to minimize
potential scour and to maximize treatment efficiency.
The proposed project will mitigate the pollutants of concern by fitting each of the proposed curb
inlets and catch basins within the parking lot with the Fossil FiIter™ Storm Water Filtration
System for water quality purposes. This project will not increase the amount of surface runoff
directed towards Batiquitos Lagoon.
There are pollutants that may be present in the surface runoff generated by the proposed
improvements for the Bressi Ranch Lots 3"3-39 that could further impair the water quality of the
receiving waters. Pollutants which cause impairment of receiving waters are considered primary
pollutants of concern.
Primary pollutants are:
Nutrients from fertilizers
Sediment discharge due to construction activities
Pesticides from landscaping
Secondary Pollutants are:
Sediment discharge due to construction activities
Trash and debris
Oil and grease from parked cars
Heavy metals from parked cars
O~ygen demanding substances
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3.0 MITIGATION MEASURES TO PROTECT WATER QUALITY
To address water quality for the project, BMPs will be implemented during construction and
post -constructi on.
3.1 Construction BMPs
A detailed description of the construction BMPs has been developed with the Grading Plan
Engineering. In addition to the BMPs listed on the Project Grading Plans, the following BMPs
may also be used as required to the satisfaction of the City Engineer.
• Silt Fence • Desilting Basin
• Fiber Ro"s • Gravel Bag Berm
• Street Sweeping and Vacuuming • Sandbag Barrier
• Storm Drain Inlet Protection • Material Delivery and Storage
• Stockpile Management • Spill Prevention and Control
• Solid Waste Management • Concrete Waste Management
• Stabilized Construction Entrance/Exit • Water Conservation Practices
• Dewatering Operations
• Vehicle and Equipment Maintenance • Permanent Revegetation of all disturbed uncovered
-areas
• Erosion Control Mats and Spray-on Applications
Construction BMPs for this project will be selected, constructed, and maintained so as to comply
with all applicable ordinances and guidance documents.
A Storm Water Pollution Prevention Plan (SWPPP) will be prepared separately to address the
pollution prevention measures that will be taken during construction.
3.2 Post-construction BMPs
3.2.1 Site Design BMPs
All disturbed areas will be either paved or landscaped. There will be no areas left bare.
Landscaping of the proposed limits of disturbance is also incorporated into the plans. The
landscaping will consist of both native and non-native plants. The goal is to· achieve plant
establishment expeditiously to reduce erosion. The irrigation system for these landscaped areas
will be monitored to reduce over irrigation.
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Project proponents shall implement Site Design concepts that achieve each of the following:
1) Minimize Urban Runoff
2) Minimize Impervious Footprint
3) Conserve Natural Areas
4) Minimize Directly Connected Impervious Areas (DCIAs)
The project proponent should identify the specific BMPs implemented to achieve each Site
Design concept and provide a brief explanation for those Site Design concepts considered not
applicable.
If a particular Site Design BMP concept is found to be not applicable, a brief explanation as to
why the concept cannot be implemented will be provided. Also a narrative describing 110W each
included BMP will be implemented will be provided. In those areas, where Site Design BMPs
require ongoing maintenance, the inspection and maintenance frequency, the inspection criteria,
and the entity or party responsible for implementation, maintenance, and/or inspection shall be
described.
Bressi Ranch Lots 33-39 site was designed to treat flow through BMP's implementations that
include:
Grass line Swale
Inlets fitted with fossil filters
Grass line Swale was designed to minimize and convey the runoff flow during a 1 OO-year storm
and act as a structural BMP during the 85th percentile storm. .
Grass line swales were designed to intervene the 85 th per~entile flow, increase the time of
concentration and treat the flow prior to discharging the proposed development
Only those catch basins in the onsite privately owned and maintained property shaH have a fossil
filter installed.
Project proponents shall implement Site Design concepts that achieve each of the following: .
1.) Minimize Urban Runoff
2.) Minimize Impervious Footprint
3.) Conserve Natural Areas
4.) Minimize Directly Connected Impervious Areas (DCIAs)
The following Site Design BMPs were not implemented into the site design:
Site Design Concept 1
Minimize Urban Runoff: All site storm drains tie to existing public storm drain systems.
Therefore, no need to install new perforated pipe or gravel filtration pits for low flow infiltration.
Site Design Concept 1
Minimize Impervious Footprint: All adjacent streets area existing, therefore no improvements are
proposed to reduce widths of streets.
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Site Design Concept 1
Conserve Natural Area: There are no natural areas to converse. Site is mass-graded.
Site Design Concept 2
Minimize Directly Connected Impervious Areas: All adjacent streets are existing, therefore no
improvements are proposed to direct flow into vegetated swales or gravel shoulders.
The following Site Design BMP's Will be implemented into the site design:
Site Design Concept 1
Minimize Urban Runoff: Grass swales and fossil filter inserts are proposed to aid ill infiltration
of pollutant runoff.
Site Design Concept 1
Minimize Impervious Footprint:
The proposed commercial buildings were designed to minimize the building footprint and
still keep the buildings functional.
The site design includes parking lot aisles designed to minimum allowed widths.
The landscape site design utilizes minimal impervious surfaces.
Site Design Concept 1
Conserve Natural Areas: Due to site constraints, the use of natural drainage system is not
practical; but the site design includes grass-lined swales where feasible in outlaying areas.
Site Design Concept 2
Minimize Directly Connected Impervious Areas:
All of the roof runoff from the buildings will be directed to landscaped areas. This
amounts to 100% of the overall roof runoff draining to landscaped areas.
Where feasible, runoff from parking lot is directed into grass-lined swales.
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Table 3.2.1.1 Site Design BMPs
Design Technique Specific BMP
Conce t
Site Desigl1l .. M:..o.:.:..i l1:..:.;il:.:..!11.!.!iz~e:.....-_--"=U:..!..r.:..:.b!::.!;al~1 .. :
Concept 1 Runoff
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Maximize the permeable area.
Incorporate landscaped buffer areas between
sidewalks and streets.
Maximize canopy interception and water
conservation by preserving existing native trees
and shrubs, and planting additional native or
drou ht tolerant trees and lar e shrubs.
Use natural drainage systems.
Where soils conditions are suitable, use perforated
pipe or gravel filtration pits for low flow
infiltration.
Construct onsite ponding areas or retention
facilities to increase opportunities for infiltration
consistent with vector control objectives.
Other comparable and equally effective site design
concepts as approved by the Co-Permittee. (Fossil
Filter inserts and Coanda Downspout Filters)
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yes no
x
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Table 1. Site Design BMPs (Cont.)
Design
Concept
Site
Design
Concept 1
Technique
Minimize Impervious
Footprint
Specific BMP
Maximize the permeable area.
Construct walkways, trails, patios, overflow
parking lots, alleys, driveways, low-traffic streets
and other low -traffic areas with open-jointed
paving materials or permeable surfaces, such as
pervious concrete, porous asphalt, unit pavers, and
ranular materials.
Construct streets, sidewalks and parking lot aisles
to the minimum widths necessary, provided that
public safety and a walk able environment for
pedestrians are not com romised.
Reduce widths of street where off-street parking is
available.
Minimize the use of impervious surfaces, such as
decorative concrete, in the landscape design.
Other comparable and equally effective site design
concepts as approved by the Co-Permittee (Note:
Additional narrative required describing BMP and
how it addresses Site Desi n conce t). I--------~---------------------+~
Site Conserve Natural -
Design Areas
Co~cept 1
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Conserve natural areas.
Maximize canopy interception and water
conservation by preserving existing native trees
and shrubs, and planting additional native or
drought tolerant trees and large shrubs.
Other comparable and equally effective site design
concepts as approved by the Co-Permittee (Note:
Additional narrative required describing BMP and
how it addresses Site Design concept).
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Table 1. Site Design BMPs (Cont.)
Design Technique Specific BMP
Concept
Site Minimize Directly Residential and commercial sites must be designed
Design Connected to contain and infiltrate roof runoff, or direct roof
Concept 2 Impervious Areas runoff to vegetative swales or buffer areas, where
(DCIAs) feasible.
Where landscaping is proposed, drain impervious
sidewalks, walkways, trails, and patios into
adjacent landscaping.
Increase the use of vegetated drainage swales in
lieu of underground piping or imperviously lined
swales.
Rural swale system: street sheet flows to vegetated
swale or gravel shoulder, curbs at street corners,
culverts under driveways and street crossings.
Urban curb/swale system: street slopes to curb;
periodic swale inlets drain to vegetated
swale/biofilter.
Dual drainage system: First flush captured in
street catch basins and discharged to adjacent
vegetated swale or gravel shoulder.
Design driveways with shared access, flared
(single lane at street) or wheel strips (paving only
under tires); or, drain into landscaping.
Uncovered temporary or guest parking on private
residential lots may be paved with a permeable
surface, or designed to drain into landscaping.
Where landscaping is proposed in parking areas,
incorporate landscape areas into the drainage
design. (Grass-Crete in parking isles)
Overflow parking (parking' stalls provided in
excess of the Co-Permittee's minimum parking
requirements) may be constructed with permeable
Ipaving.
Other comparable and equally effective -design
concepts as approved by the Co-Permittee (Note:
Additional narrative required describing BMP and
how it addresses Site Design concept). -. -.'
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Included
yes no
X
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V.2 SOURCE CONTROL BMPs
Table 2. Source Control BMPs
BMPName
Non-Structural Source Control BMPs
1) Education for Property Owners, Operators,
Tenants, Occupants, or Employees
2) Activity Restrictions
3) Irrigation System and Landscape Maintenance
4) Common Area Litter Control
5) Street Sweeping Private Streets and Parking
Lots
6) Drainage Facility Inspection and Maintenance
Structural Source Control BMPs
7) Stenciling and Signage
8) Landscape and Irrigation System Design
9) Protect Slopes and Channels
Provide Community Car Wash Racks
Properly Design:
Fueling Areas
Air/Water Supply Area Drainage
10) Trash Storage Areas
Loading Docks
Maintenance Bays
Vehicle and Equipment Wash Areas
Outdoor Material Storage Areas
Outdoor Work Areas or Processing Areas
Provide Wash Water Controls for Food
Preparation Areas
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Check One
Not
Applic If not applicable, state
Included able brief re~son
1i,~,:~i;~3,,~~"f~~ :~~~i ~~~:~~J.~1!{~W:~~ l~+~¥~ c'\:-\J"'":C;~"li~~~~~i~F{~i;'~~~~~~~
X
X
X
X
X
X
I~,;';j~~~i~~~:~~::~ti~i ?}!~~t~~~~~~~t,i ,:< :'~i:~~;1 ;~~~;~ii1~~~ Ji~
X
X
X
No community car
X wash racks on this site
No fueling areas on
X this site
No air/water supply
area drainage on this
X site
X
X
No maintenance bays
X on this site
No vehicle and
equipment wash areas
X on this site
No outdoor material
storage areas on this
X site
No outdoor work areas
X on this site
No wash water areas
X on this site
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1. EDUCATION FOR PROPERTY OWNERS, OPERATORS, TENANTS, OCCUPANTS
AND EMPLOYEES
Spectrum Flex, LLC shall provide a training package to all lessee, venders and contractors who
will be performing maintenance or construction within the project site including but not limited
to:
-Lessee
-Landscape Maintenance Company
-HV AC Contractor
-Building Maintenance Providers
-Trash Collection Company
Spectrum Flex, LLC shall provide a training package at such time when the lessee occupies their
specific space. Venders and contractors shall be provided a training package prior to the
commencement of scope of work.
The training material package shall include at a minimum the following items:
-Color Exhibit showing the storm water layout and various components of the system.
-City of Carlsbad Handout
-This manual
2. ACTIVITY RESTRICTIONS
Spectrum Flex, LLC shall develop use restrictions for all occupants/tenants through lease terms.
The use restrictions include, but are not limited to, no outdoor storage of materials, i10 on-site car
washing unless facilities available to capture all rinsate from the car wash, and no storage of
hazardous materials on-site.
3. IRRIGATION SYSTEM AND LANDSCAPE MAINTENANCE
Spectrum Flex, LLC shall ensure to maintain all landscaping and irrigation facilities.
The operational and maintenance needs of the landscaping are:
• Keep landscape areas in a neat and orderly condition.
• Pick up garbage left within landscape areas.
• Removal of all freshly trimmed landscape items and natural deposited items such as annual
leaves and disposal off-site per governing codes.
• Whenever possible use foliarlor soil nutrient testing before applying fertilizers to verify
application timing and rate.
• Use a higher percentage of fertilizers contain slow -release N, such as IBDU and sulfur-
coated urea. Be aware that organics (i.e. bone meal) and some slow-release fertilizers are
dependent on microbial activity for the release of nitrogen; therefore low soil temperature will
decrease the release of nitrogen available for plant uptake.
• If highly soluble-N fertilizers are used, apply smaller amounts on a more frequent basis.
• Incorporate fertilizer directly into the soil around the plant, where possible, to minimize
potential surface runoff.
• Although fertilizers must be watered in soil in order to work, the watering in should occur
with light irrigation just after application. Due to the unpredictability of rain events, it is
recommended that fertilizers not be applied in the rain or on the same day that rain is expected.
• Irrigation application rates and schedules should be adjusted to minimize surface runoff,
especially immediately following the application of a fertilizer.
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• Immediately clean up any spill of feltilizers using dry methods of clean up such as by
sweeping or scooping up material.
• Fertilizer storage facilities should be covered and have a impermeable foundation so that
potential spills cannot runoff into surface water or leach into groundwater systems.
• Fertilizers must be securely covered in the vehicle before being transported to application
sites to avoid spillage or loss during transpOlt.
• Weed Control. Weeds will be removed through mechanical means. Herbicide will not be
used because these chemicals may impact the water quality monitoring.
• Thoroughly investigate and consider all leas toxic pest management practices.
• Maintain a complete list of all pesticides used and the use site.
• Use pesticides only according to label instructions.
• Consider weather conditions that could affect application. For example, wind conditions
affect spray drift; rain my wash pesticides off of leaves.
• Do not apply pesticides where there is a high chance of movement into water bodies; for .
example, they should not be applied near wetlands, streams, lakes, ponds or storm drains unless
it is for an approved maintenance activity.
• In most cases, triple-rinse empty containers before disposal. Particular information on the
proper disposal of the pesticide and its container can be found 0 the label.
• Never clean or rinse pesticide equipment and containers in the vicinity of storm drains or
other open water areas.
• Store pesticides in areas with cement floors and in areas insulated from temperature extremes.
• Secure chemicals and equipment during transportation to prevent tipping or excess jarring .
. • Pesticides must be transported completely isolated from people, food and clothing for .
example in the bed of the truck rather than in the passenger compaltment.
• Inspect pesticide equipment, storage containers and transportation vehicles frequently.
• Develop a plan for dealing with pesticide spills and accidents.
• Unless their safety is compromised, workers must immediately clean up any chemical spills
according to label instructions and notify the appropriate supervisors and agencies.
• Pesticide applications on public property, which takes place on school grounds, parks, or other
public right-of -way where public exposure is possible, shall be posted with warning signs.
• Broken sprinkler heads and/or lines will be repaired or replaced in a timely manner.
• Periodic testing of all irrigation stations to verify if each landscape area is getting the correct
amount of water.
• Periodic testing of all flow reducers and/or shutoff valves to verify in good working order.
Section 5.5.
Hazardous Waste
Suspected hazardous wastes will be analyzed to determine disposal options. Hazardous wastes
generated onsite will be handled and disposed of according to applicable local, state, and federal
regulations. A solid or liquid waste is considered a hazardous waste if it exceeds the criteria
listed in the CCR, Title 22, Article 11.
4. COMMON AREA LITTER CONTROL
Spectrum Flex, LLC shall be responsible to implement trash management and litter control
procedures in the common areas aimed at reducing pollution of drainage water. Trash
receptacles shall be placed along traveled paths. Ash urns shall be placed at areas where
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smoking is allowed. The responsibilities shall include litter patrol, emptying of trash receptacles
in common areas and noting trash disposal violations.
5. STREET SWEEPING PRIVATE STREETS AND PARKING LOTS
Spectrum Flex, LLC shall be responsible to sweep the parking lots and private access drives.
6. BMP MAINTENANCE
Spectrum Flex, LLC shall be responsible for implementation of each non-structural BMP and
scheduled cleaning andlor maintenance of all non-structural BMP facilities.
Detention Basin:
The Detention Basin shall be visually inspected on a monthly basis for proper functionality. The
basin shall be cleaned on a yearly basis. The basin shall have all trash and contaminates
removed and disposed of off site per the City of Carlsbad Municipal code. The basin shall be
inspected for worn or damaged parts. All worn or damage parts shall be replaced immediately.
Inlet Inserts:
Hydro-carbon filters shall be visually inspected for proper functionality. The filters shall be
replaced.
General Storm Drain:
All storm drain facilities including inlets, pipes, Detention Basin, inserts shall be visually
inspected yearly for damage or worn pmis.
7. MS4 STENCILING AND SIGNAGE
All storm water boxes (catch basins, inlets, etc) shall be stamped or stenciled with prohibitive
language (e.g., "No Dumping - I Live in the Batiquitos Lagoon") andlor graphical icons to
discourage illegal dumping satisfactory to the City Engineer. If required, the stamping shall be
in Spanish as well. The stamping or stenciling shall be maintained to remain legible.
8. LANDSCAPE AND IRRIGATION SYSTEM DESIGN
Landscape and irrigation system was designed to ensure and implement the treatment of runoff
flow.
9. PROTECT SLOPES AND CHANNELS
The operational and maintenance needs to protect slopes and channels shall be:
Convey runoff safely from the tops of slopes
A void disturbing natural channels
Stabilize disturbed slopes as quickly as possible
Vegetate slopes with native or drought tolerant vegetation
Control and treat flows in landscaping andlor other controls prior to reaching existing natural
drainage systems.
Stabilize temporary and permanent channel crossings as quickly as possible, and ensure that
increases in run-off velocity and frequency caused by the project do not erode the channel.
Install energy dissipaters, such as riprap, at the outlets of new storm drains, culverts, conduits, or
channels that enter unlined channels in accordance with applicable specifications to minimize
erosIon. Energy dissipaters shall be installed in such a way as to minimize impacts to receiving
waters.
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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 surface, since these materials not only reduce runoff velocities,
but also provide water quality benefits from filtration and infiltration. If velocities in the channel
are high enough to erode grass or other vegetative linings, riprap, concrete, soil cement, or geo-
grid stabilization or other alternative.
10. TRASH STORAGE AREAS
The operational and maintenance needs of trash storage areas shall be:
The trash storage area shall be paved with an impervious surface, designed not to allow run-on
from adjoining areas.
The trash storage area shall be screened or walled to prevent off-site transport of trash.
Use lined bins or dumpsters to reduce leaking of liquid waste.
Provide roofs, awnings, or attached lids on all trash containers to minimize direct precipitation
and prevent rainfall from entering containers.
Pave trash storage areas with an impervious surface to mitigate spills.
Do not locate storm drains in immediate vicinity of the trash storage area.
Post signs on all dumpsters informing users that hazardous materials are not to be disposed of
therein.
The integrity of structural elements that are subject to damage (Le., screens, covers, and signs)
must be maintained by the owner I operator.
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. POOR
QUALITY
ORIGINALS
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Storm water runoff occurs when precipitation
(rom flln or snowmelt flows over the around.
Impervious surfaces like driveways. sidewalks.
Ind streets prevent stormwater from
naturally soaklna Into the around.
Stormwater can pick up debris. chemicals. dirt. and other
pollutants and now Into a storm sewer system or directly to
I lake. stream. river. wetland. or coastal water. Anythlna that
enters a storm sewer system Is dlscharied untreated Into
the waterbodles we use for swlmmlna. flshlna. and provldina
drlnklna water.
Polluted stormwater runon can have
many adverse effects on plants. fish.
Inlmals. and people.
• Sediment can cloud the water
Ind make It difficult or
Impossible for aquatic plants to
arow. Sediment also can
destroy aquatic habitats.
• Excess nutrients can cause
Ilaae blooms. When alaae die.
they sink to the bottom and decompose
In a process that removes oxyaen from
the water. Fish and other aquatic
oraanlsms can't exist In water with low
dissolved oXYien levels.
• Bacteria and other pathoiens can wash
Into swim mine arels and create health
hazards. often maklna beach closures
necessary.
• Debris-plastic baas. six-pack rlnas. bottles. and
clearette butts-washed Into waterbodles can choke. suffocate. or
disable aquatic life like ducks. fish. turtles. and birds.
• Household hazardous wastes like Insecticides. pesticides. paint.
solvents. used motor all. and other auto fluids can poison aquatic life.
Land animals and people can become sick or die from utlni diseased
fish and shellfish or Ineestlne polluted water.
• ~lIuted stormwater often
Iffects drlnkl"e water
Sources. this. In turn. can
Iffec:t human heillth and
Increase drlnklna Wilter
treatment costs.
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~
¥ oC ~ /JJpaU ,{~tktt p~ tJ.ar
f~ r.4tJotir.a&, lUrA..Ii f.IIJcrti.':ido,. pfJ1k4/eJ. paiBZ:
~, IIII1l1JeJ ~ oJ IIIIIi afh", _ 1luiIA.
Washinl your clr Ind
deweasln. auto parts at home
can send deteraents and other
contaminants throu8h the
storm sewer system. Dumpln. lIutomotive fluids Into stann drains has the same result as dumplnllhe materials directly In to a waterbody.
• Use a commercial car wash that treats or
recycles Its wastewater. or wash your car on
your yard so the water infiltrates Into the
il'ound.
()1Iff, 'r 1«" b D«li ~ gfllUNi oC /JIJD. JIOfM ~.
tAwllt4re
Excess fertilizers
and pesticides
applied to lawns
and gardens Wish off and pollute
. streams. In
addition. yard
cllpplncs and
leaves can wash
Into storm drains and contribute
nutrients and organic matter to streams.
'" • Don't overwater your lawn. Consider
, uslnc a soaker hose Instead of a
'" ,,',sprinkler.
• Use pesticides and fertilizers
sparin&ly. When use Is necessary. use
these chemicals In the recommended
amounts. Use organic mulch or safer " " pest control methods whenever
possible. , '
• Compose or mulch yard waste, Don't
leave It In the street or sweep It into
storm drains or streams.
• Repair leaks and dispose of used auto fluids and batteries at deslillated drop-off or
recycllnclocatlons.
Septic ~'. ;:~~:~:d ;;.-
poc:n1y ~ "~':'i': .' :~~~alned ';;';", ~.::. .. !"'" ""iti.i
systems release nutrients and
pathogens Ibacterla and
viruses) that can be picked up
by stormwater and discharged
Into nearby waterbodles.
Pathogens can cause public health problems and
environmental concerns.
• Inspect your system every 3 years and pump your
tank as necessary (every 3
to' years).
• Don't dispose of
household hazardous
Pet Wlllt,
Pet waste can be
a malor source of ;;;;;=:.. \~
bacteria and
excess nutrients
In local waters.
• When walklnc
your pet, : .'
remember to pick up the '
waste and dispose of It
properly. Flushlni pet
waste Is the best disposal
method. L.eavlni pet waste
on the around Increases
public health risks by
allowln8 hannful bacteria
ilnd nutrients to wash into
the storm drain and
eventually Into local
waterbodles.
ReJ~ IadAro.pUfg
Permeable !':Ivemlnt-Tradltlonal conCrete and
asphalt don't allow wlter to SOIk Into the around
Instead these surfaces rely on storm dr .. lns to •
divert unwanted-wlter. Permeable pavement
systems allow rain and snowmelt to soak throui/l
decreaslnc stormwater runoff. •
R.lln hrrels-'1tIu Cln collect rainwater from
roOftops In mosquito.
proof containers. The
water can be used laler on
lawn or prden areas.
Rain Carden. lind
CtUIY Swalt_Speclally ,
deslcned areas planted
With native plants can provide naturll pl .. ees for
Il!!m"'IIPl'!I!'!'!:1l1 rainwater to collect . and soak -'nto the
wound. Rlln (rom
rooftop areas or paved
arelS can be diverted
Into these areas rather
thin Into Storm drains.
VegetQIO!d Filler Strip_PUler strtps are areas of
nltlve arass or plants crelted alon. roadways or
strelms. They trap the pollullnts stormwlter
picks up as It flows ICroSS drtveways and streets. " •• Cover plies of dirt or mulch being
,'= '" ,used In landscaping prolects. , waste In sinks or toilets.
" .... '
",;." :' :
)"
'.~ .' " ~.', . : ........ ',.
. " ., ", " ...... .
Dirt. oil. Ind debriS that collect In
parking lots and paved areas can be
washed Into the storm sewer system
and eventually enter local
waterbodles.
• Sweep up litter and debris (rom sidewalks. driveways and parklnclots,
especially arouna storm drains.
Erosion controls that aren't maintained can cause
excessive amounts of sediment and debriS to be
carried Into the stormwater system. Construction
vehicles can leak fuel. 011. and other harm/uilluids that can be picked up by stormwater and
depOSited into local waterbodies.
• Divert stormwater away from disturbed or
exposed areas of the construction site.
• Cover wease storage and dumpsters
and ~eep them clean to avoid leaks.
• Report any chemical spill to the local
hazardous waste cleanup team •
They'll know the best way to keep
spillS Irom harmln8 the environment.
• InstaU slit fences, vehicle mud removal areas,
veietatlve cover. and other sediment and
erosion controls and properly maintain them,
especially after rainstorms.
• Prevent soli erosion by mlnlmlzlna disturbed
areas during construction prolec:ts, ilnd seed
and mulch bare areas as soon as possible •
Lick of vegetation on streambanks can lead to erosion. OveriTued pastures can also
contribute excessive amounts of sediment to local waterbodles. Excess fertilizers a'ild'
pesticides can polson aquatic anImals and lead 10 destructive aliae blooms. Uvestock in
streams can contaminate waterways with bacteria. making them unsale for human contact.
• Keep livestock away from streambanks and provide
them a water source away from waterbodies.
• Store and apply manure away from waterbodles and In
accordance with ~ nutrient manaaement plan.
• \4!aetate tiparlan areas alona waterways.
• Rotate animal grazlna to prevent soil erosion In lIelds.
• Apply fertilizers and pesticides according to label Instructions to save money and minimize pollution.
Improperly manaied 101liini operations can result In erosion and
sedimentation.
• Conduct preharvest planning to prevent erosion and lower costs.
• Use IOiglni methods and equipment that minimize soli disturbance.
, • Plan and design skid trails. yard areas. and truck access roads to
minimize stream crossings and avoid disturbing the forest /loor.
t Construct stream crossings so that they minimize erosion and physical
changes to streams.
• Expedite revegetation of cleared areas.
Uncovered fueUne stations allow spills to be
washed'into storm drains. Cars wallins to be
repaired can leak fuel, all, and other harmful
Hulds that can be picked up by !tonnwater.
• Clean up spills Immediately and properly dispose of cleanup mate-rials.
• Provide cover over lueline stations and design or retrofit facilities lor spill
containment.
• Properly maintain !leet vehicles to prevent 011. gas. and other discharges from being
washed Into local water bodies.
• Install an,d malnrllj~ !l!!"Jj~tsr ;;;:j;iiatu~.
------------------------
Do . . . Dispose of small amounts of washwater from cleaning
building exteriors, sidewalks, or plazas onto landscaped or unpaved
suJ1aces provided you have the owner's permission and the discharge will
not cause flooding or nuisance problems. or flow into a storm drain.
Do ••• Check with your local sewering agency's policies and
reqUirements concerning waste water disposal. Water from many
I)utdoor cleaning activities may be acceptable for disposal to the sewer
l;ystem. See the list on Ihe back of Ihis lIyer for phone numbers of the
:;ewering agencies in your area.
;1)0 ••• Understand that water (without soap) used to remove,dust
from clean vehicles may be discharged to a street or storm drain.
Washwater from sidewalk, plaza, and building surface cleaning may
~i'O into a street or storm drain if All of the following conditions are met:
1) The suJ1ace being washed is free of residual oil stains, debris and
similar pollutants by using dry cleanup methods (sweeping, and
cleaning any oil or chemical spills with rags or other absorbent materials
before using water).
2) Washing is done wilh water only-no soap orother cleaning materials.
3) You h.:,ve not used the water to remove paint from surfaces during
cleaning.
-'OUld-lio;';CleanIOgf-AC1ivilles
Do • • • Undersland that mobile auto detailers should divert
washwater to landscaped or dirt areas. Note: Be aware that soapy
washwater may adversely affect landscaping; consult with the property
owner. Residual washwaler may remain on paved surfaces to evaporate;
sweep up any remaining reSidue. If there is suffiCient water volume to reach
the storm drain, collect the runoff and obtain permission to pump it into the
sanitary sewer. Follow local sewering agency's reqUirements for disposal.
Regarding Cleaning Agents:
If you must use soap, use biodegradable/phosphate free cleaners. Avoid use
of petroleum based cleaning products. Although the use of nontoxic cleaning
products is strongly encouraged, do understand that these products can still
degrade water quality and, therefore, the discharge of these products into
the street, gulters, storm drain
system, or waterways is prohibited
by local ordinances and the Stale
Water Code.
Note: When cleaning surfaces with a high pressure washer or steam
cleaning methods, additional precautions should be taken to prevent the
discharge of poUutants inlo Ihe slOf"m drain syslem. These!wo ~elhods of
surface cleaning, as compared to the use of a low pressure hose, can
remove additional malerials that can conlaminale local walerways.
OTHER TIPS TO HELP
PROTECT OUR WATER •• _
• •
•
SCREENING WASH WATER
DRAIN INLET PROTECTIONI
CONTAINI~G & COllECTING
WAStiWATER
EaUIPMENT AND SUPPLIES
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3.2.2 Source Control BMPs
All hazardous materials with the potential to contaminate urban runoff shall be placed in an
enclosure such as, but not limited to, a cabinet, shed or similar structure that prevents contact
with rain, runoff or spillage to the storm water conveyance system. In addition, the hazardous
materials enclosure shall be protected by secondary containment structure such as berms, dikes,
curbs or temporary spill containment system. The storage area shall also be paved and
sufficiently impervious to contain leaks and spills, and have a roof or awning to minimize direct
precipitation within the secondary containment area.
Trash storage areas shall be paved with an impervious surface, designed not to allow run-on from
adjoining areas and screened or walled to prevent off-site transp0l1 of trash; and contain attached
lids on all trash containers that exclude rain or contain a roof or awning to minimize direct
precipitation.
Use of efficient irrigation systems shall be incorporated into the landscape design. Rain shutoff
devices shall be employed to prevent irrigation after precipitation. In addition, the irrigation
system shall be designed to meet each landscape area's specific water requirements consistent
with the Carlsbad Landscape Manual. Finally, flow reducers or shutoff valves triggered by a
pressure drop shall be used to control water loss in the event of broken sprinkler heads or lines.
All storm water boxes (catch basins, inlets, etc) shall be stamped or stenciled with prohibitive
language (e.g., "No Dumping - I Live Downstream") satisfactory to the City Engineer. The
stamping or stenciling shall be located in the concrete pavement adjacent to the trench drains. If
required, the stamping shall be in Spanish as well. The stamping or stenciling shall be
maintained to remain legible.
An additional Source Control BMP to be used on-site is good housekeeping. Good
housekeeping practices that shall be utilized on site include keeping outdoor areas in a neat and
orderly condition, picking up garbage left within the pavement and landscape areas. The site
shall be visually inspected on a weekly basis to remove all "foreign" items including, but not
limited to, landscape debris and common trash.
Routine maintenance procedures for good housekeeping include removing all freshly trimmed
landscape items and natural deposited items such as annual leaves and dispose off-site per
governing codes. In addition, during fertilizing, herbicide or pesticide application, over spray to
non-landscape areas shall not be permitted. Application shall be limited to landscape area only.
All fertilizer, herbicide or pesticide shall be applied in the amount and application as provided by
the manufacturer. All empty containers shall be disposed of off-site per local codes. Finally, the
paved areas shall be swept as necessary using dry methods (manual sweeping, street sweepers,
etc) to remove dust and sediment buildUp. Sweeping schedule to be determined by Spectrum
Flex, LLC.
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3.2.3 Treatment Control BMPs
As stated in Section 111.2.0 of the City of Carlsbad's Standard Urban Storm Water Mitigation
Plan Storm Water Standards Manual, high priority projects shall include treatment control BMPs
designed to infiltrate, filter and/or treat runoff from the project footprint to one of the 4'Sizing
Treatment Standards" listed in Table 3 of the Manual. The site design for Bressi Ranch Lots 33-
39 will utilize both the Fossil Filter'lM Storm Water Filtration System and bio-filtration (grass-
lined swales) for water quality purposes. Both the Fossil FilterlM Storm Water Filtration System
and grass-lined swales can cleanse the runoff generated by a storm event with a rainfall intensity
of 0.2 inch/hour without impeding flow.
3.2.3.1 Fossil Filter TM Storm Water Filtration System
The Fossil Filter'l'M Storm Water Filtration System places a catch basin insel1 device that contains
a filtering medium (a sOl'bent) just under the grates of the storm water system's catch basins or
just below the gutter flow line of the system's curb inlets. The water runoff flows into the inlet,
through the filter where the target contaminants are removed, and then into the drainage system.
An example of Fossil FilterlM Storm Water Filtration System is shown in Figure 3.1. The system
effectively filters the first flush of stonnwater runoff from a storm event and provides an
overflow capability sufficient to prevent the system from becoming clogged. The sorbent
medium is a nonleaching inert blend of minerals that contain non-hazardous ingredients, as
defined by Federal EPA, OSHA and WHO.
3.2.3.2 Vegetated Swales
Vegetated swales are vegetated channels that receive directed flow and convey storm water.
Vegetated strips are vegetated sections of land over which storm water flows as overland sheet
flow. Pollutants are removed by filtration through the grass, sedimentation, adsorption to soil
particles, and infiltration through the soil. Swales are mainly effective at removing debris and
solid particles, although some dissolved constituents are removed by adsorption onto the soil.
See the Project Plan (Attachment 4B') for a cross-section of the proposed vegetated swales.
3.2.3.1.1 Appropriate Applications and Siting Constraints
Vegetated swales should be considered wherever site conditions and climate allow vegetation to
be established and where flow velocities are not high enough to cause scour. Even where swales
cannot be sited to accept directed sheet flow, vegetated areas provide treatment of rainfall and
reduce the overall impervious surface.
Factors Affecting Preliminary Design:
Vegetated strips have two design goals:
• Maximize treatment
• Provide adequate hydraulic function for flood routing, adequate drainage and scour
prevention. Treatment is maximized by designing the flow of water through the swale
to be as shallow and long as site constraints allow. No minimum dimensions are
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required for treatment purposes, as this could exclude swales from consideration at
some sites. Swales should also be sized as a conveyance system calculated according to
City procedures for flood routing and scour. To maximize treatment efficiency, strips
should be designed to be as long (in the direction of flow) and as flat as the site will
allow. No minimum lengths or maximum slopes are required for treatment purposes.
The area to be used for the strip should be free of gullies or rills that can concentrate
overland flow and calise erosion. Table 3.2.1 summarizes preliminary design factors for
vegetated swales (County of San Diego SUSMP Appendix F).
Table 3.2.1: Summary Of Bio-filtration Design Factors (Strips And Swales)
Description Applications/Siting Preliminary Design Factors
Swales are vegetated channels that • Site conditions • Swales sized as a conveyance
receive and convey storm water. and climate allow system (per City of Carlsbad
Strips are vegetated buffer strips vegetation to be flood routing and scour
over which storm water flows as established procedures)
sheet flow. • Flow velocities • Swales sized as a conveyance
Treatment Mechanisms: not high enough to system (per City of Carlsbad
• Filtration through the grass cause scour flood routing and scour
• Sedimentation procedures)
• Absorption to soil palticles • Swale water depth as shallow
• Infiltration as the site will pei'mit
Pollutants removed: • Strips sized as long (in
• Debris and solid particles direction offlow) and flat as
• Some dissolved constituents the site allows
• Strips should be free of gullies
or rills
• No minimum dimensions or
slope restrictions for treatment
purposes
• Vegetation mix appropriate for
climates and location
Table 3.2.2: Criteria for Optimum Swale Performance
Parameter Optimal Criteria Minimum Criteria
Hydraulic Residence Time 9 minutes 5 minutes
Average Flow Velocity 0.9 ft/sec
Swale Width 8ft 2ft
Swale Length 200 ft 100 ft
Swale Slope 2-6% 1%
Side Slope Ratio (Horizontal:vertical) 4:1 2:1
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3.2.3.3 Coanda Downspout Filters
The operational and maintenance needs of a Coanda Downspout Filters are:
• Removal of contaminants, sediments and debris from stormwater runoff.
• Absorption of petroleum hydrocarbons and oil-based products from stormwater runoff.
3.2.4 Target Pollutants and Proposed BMPs
• Nutrients from fertilizers will be treated primarily by practicing and maintaining good
housekeeping procedures and by the proposed Fossil FilterrM Storm Water Filtration
System and by the vegetated swales as secondary BMPs.
• Trash and debris will be treated by practicing and maintaining good housekeeping
procedures and by the proposed Fossil FilterrM Storm Water Filtration System as a
secondary BMP.
• Pesticides from landscaping will be treated by practicing and maintaining good
housekeeping procedures.
• Oxygen demanding substances from landscaping will be treated by practicing and
maintaining good housekeeping procedures.
• Oil and grease from parked cars will be treated by the proposed Fossil FiIter™ Storm
Water Filtration System and by the proposed vegetated swales.
• Heavy metals from parked cars will be treated by the proposed Fossil FilterrM Storm
Water Filtration System and by the proposed vegetated_swales.
Prepared By P:\dwg\578\578swmp.doc
Partners Planning and Engineering 2/2/2007
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4.0 OPERATION AND MAINTENANCE PROGRAM
The operation and maintenance requirements for each type ofBMP are as follows:
4.1 Source Control BMPs
4.1.1 Hazardous Material Storage
Hazardous materials with the potential to contaminate urban runoff shall be:
• Placed in an enclosure such as, but not limited to a cabinet, shed, or similar structure that
prevents contact with rain, runoff or spillage to the storm water conveyance system.
• Protected by secondary containment structures such as berm, dikes, or curbs.
• The storage shall be paved and sufficiently impervious to contain leaks and spills.
• The storage shall have a roof or awning to minimize direct precipitation within the
secondary containment area.
4.1.2 Trash Storage
The operational and maintenance needs of trash storage shall be:
• The trash storage area shall be paved with an impervious surface, designed not to allow
run-on from adjoining areas.
• The trash storage area shall be screened or walled to prevent off-site transport of trash.
• All trash containers shall contain lids that exclude rain.
4.1.3 Efficient Irrigation System
The operational and maintenance needs of an irrigation system are:
• Preventive maintenance and visual inspection of all sprinkler heads and lines.
• Periodic testing of all irrigation stations to verify if each landscape area is getting
the correct amount of water.
• Periodic testing of all flow reducers and/or shutoff valves to verify in good working
order.
Inspection Frequency
The facility will be inspected and inspection visits will be completely documented:
• Once a month at a minimum or as directed by the City of Carlsbad.
Aesthetic and Functional Maintenance
Both forms of maintenance will be combined into an overall Stormwater Management
System Maintenance.
Aesthetic Maintenance
The following activities will be included in the aesthetic maintenance program:
• Broken sprinkler heads and/or lines will be repaired or replaced in a timely manner.
Prepared By P:\dwg\578\578swmp.doc
Partners Planning and Engineering 2/2/2007
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Functional Maintenance
Functional maintenance has two components:
Preventive maintenance
Corrective maintenance
Preventive Maintenance
Preventive maintenance activities to be instituted for an irrigation system include:
• Preventive maintenance and visual inspection of all sprinkler heads and lines.
• Periodic testing of all irrigation stations to verify if each landscape area is getting
the correct amount of water.
• Periodic testing of all flow reducers and/or shutoff valves to verify in good working
order.
Corrective Maintenance
Corrective maintenance is required on an emergency or non-routine basis to correct
problems and to restore the intended operation and safe function of an inigation
system. Corrective maintenance activities include:
• Broken sprinkler heads and/or lines will be repaired or replaced in a timely manner.
• General Facility Maintenance. In addition to the above elements of corrective
maintenance, general corrective maintenance will address the overall irrigation
system and its associated components. If conective maintenance is being done
to one component, other components will be inspected to see if maintenance is
needed.
4.1.4 Inlet / Catch Basin Tiles
The precast concrete grated catch basins shall be adorned with signage containing prohibitive
language and/or icons to discourage illegal dumping. The legibility of the signage will be
maintained and they will be placed at the top of the concrete. All signage shall be inspected at
least once a month or as directed by the City of Carlsbad. Should the legibility of the signage be
in question, then the signage shall be repainted to restore full legibility.
4.1.5 Good Housekeeping
The operational and maintenance needs associated with good housekeeping are:
• Keep outdoor areas in a neat and orderly condition.
• Pick lip garbage and/or animal fecal waste left within the pavement and landscape
areas.
• Periodic sweeping of the paved areas.
• Removal of all freshly trimmed landscape items and natural deposited items sllch as
annual leaves and disposal off-site per governing codes.
• Apply all fertilizer, herbicide or pesticide in the amount and application as provided
by the manufacturer.
Prepared By P:\dwg\578\578swmp.doc
Partners Planning and Engineering 2/2/2007
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Inspection Frequency
The site will be inspected and inspection visits will be completely documented:
• On a weekly basis or as directed by the City of Carlsbad
Aesthetic and Functional Maintenance
Both forms of maintenance will be combined into an overall Stormwater Management
System Maintenance.
Aesthetic Maintenance
The following activities will be included in the aesthetic maintenance program:
• Keep outdoor areas in a neat and orderly condition.
• Pick up garbage and/or animal fecal waste left within the pavement and landscape
areas.
• Periodic sweeping of the paved areas.
• Removal of all freshly trimmed landscape items and natural deposited items such as
annual leaves and disposal off-site per governing codes.
• Weed Control. Weeds will be removed through mechanical means. Herbicide will
not be used because these chemicals may impact the water quality monitoring.
Functional Maintenance
Functional maintenance has two components:
Preventive maintenance
Corrective maintenance
Preventive Maintenance
Preventive maintenance activities to be instituted with good housekeeping are:
• Apply all fertilizer, herbicide or pesticide in the amount and application as provided
by the manufacturer.
Corrective Maintenance
Corrective maintenance is required on an emergency or non-routine basis. Corrective
maintenance activities include:
• General Facility Maintenance. General corrective maintenance will address the
overall facility and its associated components. If corrective maintenance is
being done to one component, other components will be inspected to see if
maintenance is needed.
Prepared By P;\dwg\578\578swmp.doc
Partners Planning and Engineering 2/2/2007
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4.2 Treatment Control BMPs
4.2.1 Fossil Filter1'M Storm Water Filtration System
The operational and maintenance needs of a Fossil Filter™ Storm Water Filtration System are:
• Removal of contaminants, sediments and debris from stormwater runoff.
• Absorption of petroleum hydrocarbons and oil-based products from stormwater runoff.
Inspection Frequency
The Fossil Filter'M Storm Water Filtration System will be inspected on a regular basis. The
frequency of inspection would be based on pollutant loading, amount of debris, leaves, etc., and
amount of runoff. The manufacturer's recommendations include no less than one inspection per
year.
Manufacturer guidelines for inspection frequency are:
• For areas with a definite rainy season:
Prior to and during the rainy season.
• For areas subject to year-round rainfall:
On a recurring (preferably scheduled) basis.
• For areas with winter snow and summer rain:
Prior to and just after the snow season and during the SUlmner rain season.
• For filters not subject to the elements (wash racks, parking garages, etc.):
Inspections should be on a regular basis.
Aesthetic Maintenance
The parking lot will be swept on a regular basis. Sediment and debris (litter, leaves, papers,
cans, etc.) within the area and especially around the drainage inlet will be collected and removed
Preventive Maintenance
Preventive maintenance for the FloGarlM Storm Water Filtration System will be:
• After broom sweeping and removal of debris around the inlet, the catch basin grate will be
removed and the condition of the screens will be checked.
• For Hydrocarbon units with screens covering the adsorbent, the condition of the screen will
be checked and the adsorbent will be inspected through the screen. If excessive silt covers the
top of the adsorbent or if the adsorbent granules are more than one-half coated with a dark
gray or black substance, the adsorbent will be replaced.
• For FloGard™ units with adsorbent pouches, the condition of the pouches will be checked
and a visual inspection made of the enclosed adsorbent. If the granules are covered, the
pouches will be replaced.
• For Flo-Gard"M filters, which have a fabric filter body, the serviceability of the fabric will be
determined and, if called for, replaced with a new one.
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Corrective Maintenance
Corrective maintenance is required when the exposed adsorbent filter medium needs to be
replaced. To replace the filter medium, the steps are:
• To avoid spilling the exposed adsorbent filter medium into or onto the surrounding surface,
the person replacing the adsorbent should move away from the inlet and work over a large
work cloth.
• All exposed adsorbent and collected debris must be dumped into a D.O.T.-approved
container for later disposal. The method of replacing the adsorbent depends on the type of
filter.
• For filters with removable filter cartridges, the cartridges need to be removed from the
filter, the end caps removed and the exposed material poured out. The new adsorbent will
be poured into the adsorbent containment area to a level about 1 ~ inches from the top
screen when the filter cartridge or filter is level.
• For filters with one-piece top screens, the entire filter needs to be removed to the work
area, the top screen removed and the exposed material poured out. The new adsorbent
will be poured into the adsorbent containment area to a level about 1 Y2 inches from the
top screen when the filter cmiridge or filter is level.
• For filters with adsorbent pouches, the pouches need to be removed and disposed of. The
new adsorbent pouches are snapped into place.
Disposal of Exposed Adsorbent, Debris and Trash
The exposed adsorbent, debris and trash that is generated, will be properly disposed of by
Spectrum Flex, LLC.
• The exposed adsorbent is non-biodegradable, non-leaching and non-carcinogenic so, with
proper handling and documentation, it can be disposed of at a landfill. However, because
disposal regulations vary by area, Spectrum Flex, LLC will contact their local regulatory
agency and landfill to ensure compliance with local and state environmental regulations.
Hazardous Waste
Suspected hazardous wastes will be analyzed to determine disposal options. Hazardous
wastes generated onsite will be handled and disposed of according to applicable local,
state, and federal regulations. A solid or liquid waste is considered a hazardous waste if
it exceeds the criteria listed in the CCR, Title 22, Article 11.
4.2.2 Coanda Downspout Filters
Inspection Frequency
The Coanda Downspout filter shall be inspected after each rain event, October 15 and
April 15 of each year.
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Maintenance for the Coanda Downspout Filter will be:
• Debris containment chamber shall be cleaned once 50% of capacity of the
chamber has been met.
5.0 FISCAL RESOURCES
Spectrum Flex, LLC is aware of its responsibility to maintain all construction and post-
construction BMPs to ensure they are all in good working order. Spectrum Flex, LLC agrees to
prepare an Operation & Maintenance Plan (0 & M) satisfactory to the City Engineer. Spectrum
Flex, LLC is aware that the 0 & M plan shall describe the designated responsible party to
manage the storm water BMPs, employees training program and duties, operation schedule,
maintenance frequency, routine service schedule, specific maintenance activities, copies of
resource agency permits and any other necessary activities. Spectrum Flex, LLC understands
that at a minimum the 0 & M plan shall require the inspection and servicing of all structural
BMPs, that all maintenance requirements shall be documented, that all maintenance records shall
be retained for at least five years and that all documents shall be made available to the City for
inspection upon request at any time. In addition, Spectrum Flex, LLC is aware that security may
be required.
6.0 CONCLUSIONS
The proposed development of Bressi Ranch Lots 33-39 should not adversely impact the
beneficial uses of the Batiquitos Hydrologic Subarea of the San Marcos Hydrologic Area (HSA
904.51) of the Carlsbad Hydrologic Unit. In order to minimize water quality impacts associated
with development, Spectrum Flex, LLC will institute site design, source control and treatment
control BMPs as identified in Section 3.2 of this report.
The target pollutants generated by this site and the proposed BMPs to treat them area as follows:
• Nutrients from fertilizers will be treated primarily by practicing and maintaining good
housekeeping procedures and by the proposed Fossil Filter™ Storm Water Filtration
System and by the vegetated swales as secondary BMPs.
• Trash and debris will be treated by practicing and maintaining good housekeeping
procedures and by the proposed Fossil Filte/M Storm Water Filtration System as a
secondary BMP.
• Pesticides from landscaping will be treated by practicing and maintaining good
housekeeping procedures.
• Sediment discharge due to construction activities will be treated by the use of silt fence,
stockpile management, stabilized construction entrance/exit, erosion control mats and
spray-on applications, gravel bag barriers and permanent revegetation of all disturbed
uncovered areas.
• Oxygen demanding substances from landscaping will be treated by practicing and
maintaining good housek~eping procedures.
• Oil and grease from parked cars will be treated by the proposed Fossil Filter'l'M Storm
Water Filtration System and by the proposed vegetated swales.
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• Heavy metals fi'om parked cars will be treated by the proposed Fossil Filte/M Storm
Water Filtration System and by the proposed vegetated swales.
Although none of the BMPs chosen are rated as having a High Removal Efficiency, Spectrum
Flex, LLC believes that it has addressed the water quality issues to the maximum extent
practicable considering the size of this site and the amount of runoff generated.
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This Storm Water Management Plan (SWMP) has been prepared under the direction of the
following Registered Civil Engineer. The Registered Civil Engineer attests to the technical
information contained herein and the engineering data upon which recommendations,
conclusions, and decisions are based.
( Date
RCE 50940
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I ATTACHMENT A
I VICINITY MAP
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PARTNERS
Planning and Engineering
15938 Bernardo Center Dr.
Salt Diego, CA. 92127
Ph. (858) 376·3444
Fa.t: (858) 376·3J.55
,.", "",.. ~ A n .I • _ ,,,,,~ "I!" .. ,.,.._40
LOCA TION MAP
slte.
ROAO
VICINITY MAP
NOT TO SCALE
peQJ(cr lOCAnON
ffJZ:~f;1~~$l.1~~'J,Hf:/~ ~SESSORS PAI?CEL
lEGAL IJf$CeIPVON.:
LOrs Jt(. .. Jl or MAP Na 1-1960
N!tJ.;. 21.1-26.1-02, OJ Ot(. ~ 05
,CITY OF CARLSBAD -
I"
I ATTACHMENT B
I PROJECT MAP
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ATTACHMENT C
CALCULATIONS
For Storm Drain Analysis Please see "Storm Drain Report" Prepared by Partners
Planning and Engineering dated June 2, 2006
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A.U-/lf3 Y c?Xf ch' ~ (5 a",i,'c//'~'<'is ~ 1j:/--A~~ -:O~5~~1 vr.
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-------------------HYDROLOGY SUMMARY
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Sub-AREA "e" T I Q s n b K' D/b D Area V L Tt Remarks I
Basin Ac. (min) in/hr cfs (%) (ft/ft) (ft) (ft/ft) (ft) (sf) (ft/sec) (ft) (min) Grass Swale Calculations I
BMP Grass-Lines Swale
A2.2 0.4976 0.592 7.3 0.20 0.07 0.01 0.25 1.00 0.158 0.24 0.24 0.30 0.24 280 19.8
A3.3 0.1212 0..160 5.8 0.20 0.33 0.01 0.25 3.50 0.029 0.10 0.37 1.41 0.23 140 10.0
B5A 1.3837 0.7-16 3.6 0.20 0.21 0.01 0.25 3.50 0.026 0.09 0.33 1.26 0.17 100 10.0
B5.4 1.3837 0.7-16 3.6 0.20. 0.21 0.01 0.25 3.50 0.018 0.07 0.25 0.92 0.23 160 __ lJ·L ----
NOTE:
ALL GRASS LINED SWALES SHALL MEET THE FOLLOWING MINIMUM DESIGN CRITERIA:
I. SWALE SHALL HAVE A MINIMUM OF 10.0 MINUTE OF HYDRAULIC RESIDENCE TIME
2. THE CHANNEL SLOPE CANNOT EXCEED OVER 2.5% SLOPE
3. THE DEPTH OF FLOW CANNOT EXCEED 4 INCHES HIGH
4. THE MINIMUM ALLOWABLE LENGTH OF SWALE IS 100 FEET
5. THE BASE WIDTH OF SW ALE CANNOT EXCEED 10 FEET
6. MANNING'S EQUATION SHALL BE USED WITH A MANNING'S.N OF 0.25
578-sd 12-06-06.xls TABLE 1.4
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I ATTACHMENT D
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I APPENDIX
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-------------------
MONITORING RECORD --~-
RECOMMENDATIONS
INSPECTION DATE OF OBSERV A nONS/ FOR REPAIR! DATE OF DATE STORM INSPECTOR COMMENTS MAINTENANCE MAINTENANCE
Signed By: _____________________ _ Date: __________ _
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All amendments made to this SWMP shall be documented in this table.
DATE: BY: DESCRIPTION
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Prepared By P;\dwg\578\578swmp.doc
Partners Planning and Engineering 2/2/2007
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CONTACT
PERSON
Prepared By
Partners Planning and Engineering
ALTERNATE ALTERNATE
PHONE PHONE CONTACT PHONE
NUMBER NUMBER PERSON NUMBER
P:\dwg\578\578swmp.doc
2/2/2007
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ATTACHMENT E
OPERATION AND MAINTENANCE PLAN
2/2/2007
Prepared By
Partners Planning and Engineering P:\dwg\S78\578swrnp.doc
-------.--.-.. ~--,. ... _ .... _ ... _. ---
Estimated 0 & M Costs for BMP
8IOAt.TER -STRIPS _ SWALES
I I
e_v..--.... vedlromc __ P_IIMPSiudy. ThIS
spreadsheet will change as a<iIMianaI daIa IIeaImes awaiIatlIe. labor
IRate ICost lType
P,e.elbve Ma<nlenance and
Routile~
ROUTINE ACTIONS MAINTENANCe
INOICATOR
IfIEW·
UfASUREUENT
IMEASUREMENT-,MAlNTENAN--CC ISITE-SPECIfIC-
I
HeiQhI d vegetalion
Assess adequaIe
wegelilbv.
COwH
~fardobri&
~
---_ .. _---
' ..
.Ave.-;ge vegetaIion
~aceed512
onctle$ _genat d
" ........ ~
vegeIaIon.
,less IhaR 90 percent
coverage III $ll1Il __ or_
/han 70pe<c:enlcrn _side slape
:j.~. ;.-:.:;',.:;
Once ckftlgwel
VI5UaI iospeclion d I~ &n;;e WIing
~1hI~ '*Y-C~
skipIswaIe on IJCMII)
VISWI..-..pecIIOn of 516..,_. "'epa<e a
SIll! 5ChemaIIC 10 'ealIa __ ___ of __
lor 1Ir"""""IJ spoI5 ...
De._ed ... lie .. --_CII
_~problems.
.: _t.:-::
'ASsesS quanIIIy I_in~_ ,..-----..... _ dry seasClR.
:::!;-~_:;ii.:.:.;:L-'.J.:-,;.,Q.
ru vegeIaIion 10 iWI
avaage het9I" of 6
indles
~~
:bafren_b"Nov .
~'~;;a~";b;;"' ~~
reslOred.1o a depIJ of 2-
IfICIles. ResIofe side
slope cov«age IIWiIh
~oseed""'e.
,1I ..... 2~.(2
_)01
~(eseediogkewegelaling
arII1 !P'IJWIbI5
Remove anylrees,
orWOOOy
vegetation
::-;...:ki~b~ 1: ...... rl.>!:.Ci!
'4~~~1 ~~ I ~~ I ~~!f;~~
one Ion
1IUI;k&
101 43631 436.3Ihydroseec:te.
8
:: ... ::".'':~-
o
onIHCIn
1R.d<&
~631 34904I'¥1r .......
-... ~ I :,~" S-"'::::-="':' __ •
onHIn
1IUI;k&
43631 ol~~
cne-ton
1R.d<&
IAIMTeS ...... bclIh tines.
an erosion bIriet« I
ecPvakri poledionwil be~ __ oding
''''_ 01 043631· o·
. -.: I :'.::.r ': ~~. :t,~· /lebri5or_ ..... · __ dIsIMIIiOO ~~~
~=·'~i~r 1"liit<:!1t~:~j;¥'~!~ ~~!W;{!(~. tl~'1 :liM; ~~{~~;Qt"t1:~~~~·I~a.:: ~l .,. .......... a ............... ,; D:':"-':':''''.d .. ' ....... ' ~-;jJ,[~,;:;.~~~ .. lJ~;;;·j:'rol ¥',1!£I'y'·oI·lli·'I",,(g-_ ...-............. ~...;:l: JWN~ .: ... !i'E.t"~·~~~ t.\--?--:,,~"=::!! ~F~'i-I.:::!;,iO.~ .".-'
SediI*II* «pear
.egetaIion~
c:hameIon!J oIlIow.
i~~.
'/low is channeMd. :<IeIenIIine __ and . _ oaaeaiIIe acIioR. • '-----deep '''"'''''II'' 1c>c:harJge-1 l/Iowgradlefll.r.-
1~1i.PJg'*Y
_~and
~properly dispose 01 , 'one-Ian
Equipment IMaterials ITotal
DayffRate ICost litem ICostlCost
,~·WI ;h.~~~·1 .'~:~:.
21 2684
11 -48.15'
:~ .. .;-:..
01 26.114
01 26.84
;~t tr-2;~
SIring
;lIimmw,
, .... fodI.
bagS.~eIy
53681~
48.151_
o
01_
·::~~t~~ ..
seed.
la$lingand
50' 53998
150 547.19
o
o 000
-
Comments
';:-:'"
,,:"-.:;:-
':' ... -.-: :
--------_ ... --_ .. _. ---.. 1111!!11 .... --. ---
hspedfor~
~
InspQd lor boficMs
Gener~ MairlIenance
InspedIon
TOTAL. 810 FLT£R
ANOSWAl£5
inhibiIed ...... to
dlange in slope. 1V-1SUiII ob5efvaIion IAnnuaIy 'revegetale. sedimenl,1Di J
Molly engineer 10
deIemline if regrading .
necessary. llIeCe$5iIIy.
regrade 10 des9t I ~1tCIIIOn iIfld
,'~-*'*ip .•
regrading is 1leCe55ary.
!he jlfocess should SIart
on Ma)t. Revege&aIa
,slriplswaie in NooI.
Target ~prior 10__ INone
: :. r;::: 1~~:ai.ii.}7.:': I:::;"~e::..",::;
Iknows,hDIos __ ViIuaI~ ;::', wga&;IIignllilMMng'~i'; ...,..,~ bafiII ......... · . I :.-, .... -"",.-. _ ..... , rt~l~a!!
"*' 5&I\QIes. CUIel
511UCbes. $ide slopeS
'" ClIher lealwes
damiIged. 5igniIicarJI
eJO$IOO, _genceof
Irees. woody vegesaIion
r...--..-. etc. IvlSUill~
CWective action prior 10
SenIi-MuaIt." 1"""-:1 , ___ An4la1edy eng;nee.-.an· . ~any'-'or
-.. ooIuIion isnutevidenL ~--..
16
2
Itudt&
43.631 698.08lhydr~
43631 57.26
.. ~~~!~f~l.iJ1~ol :itik\l~
one-IIln
1IUd<&
disposal
11 48.151 -48.151", sedimn
o
~tl:-01 \~~I :2~:: : 0
'll-~
52 2268.76 I' ~~I]
l1l1I»-,
3001 1046.23111l1_,...
8726
0,
I m~
500 2.97242
-------------------_._--_.
-----.-----'.-":'-"'''-'' -.. -----
Estimated 0 & M Costs for BMP
I l.,ttll t:ttlA IMAINI ... ,_ ........ [FIE[U ,~ ........ I IMAINI' i;)11 t-... , .. " .. It; ' ...... LaDer ROUTINE ACTION INDICATOR MEASUREMENl FREOUENCY ACTIVITY REOUIREMEN
t::qUlpment I MatenalS II00ai Il.,ommems
DRAIlIINLET INSERTS -PerHrs Rate Cost Type Day~ Rate Cost Item Cost Cost
FOSSl.fl.TER
ESWII"led v_ detived "om Ca/II.i1n5 PIIoI SUP SIody. Th15
spreadsheet lOll change as addoIionaI data __ .....--.
Prevemve Manenance
and Ra.Aine Inspections
DESIGN CRITERIA
ROUTINE ACTIONS
StlfiClelll debris!
trash IhaI mukI
lf1IeIfere WIll proper
~ tor DdlIisITIiISIl IIn:IoWJg d IRSet IfISUillIltlSelVillion IUinghweC_ 43.83 0
Remove and pi"pe", 0 0
dospo$e d debri5I
!lash. Ta-get
:J Before and ClIU CUing compIeIion period
eactllatget2 5kIml ..tliIe onsIIe
(0 25or., evenl conducIing DpedioQ 18 4363 785.34 0 785.34
Replace FOS5iI Fikd
TM absodlefJI v.iIhin
10 WOIking clays.
Ab5oIbenI~ Chilradefize and
da<It'lilly. 01 diirbr. ::iAI1he end of each jGpI!fIy dispose
Of ..... ~_ . .....gea _IU:.!:>on) spe<Jl .......... pi_1O
Oil and 'lease_OIl sedi<twC. If ..... Qbsenr.IIion -----2 43.63 87.26 0 11126
Replace insed or
_ycorl$Ull wenoor 10 oeveoop
cowse 01 adIon.
In$p(:QiOn for $llUClUrai 8rol<en OIQIhenoIi5e Twic:eper,..~ effed repairs wiIhin 10
neg'.' damaged--If ..... Qbsenr.IIion Ocklber and May working dara None 2 43.&3 87.26 0 111.26
fleW
adsoIb-
RenIIWe. dIaIacIeriz8. enllN&-
and JIRlI*IY dispose "'11&
End rJ wet season. rJ media & RefIIaCe Wposat
Anraar~rJ~ ~ None AnnuaIr. in Mat media before Od. 1 None 2 43.63 87.26 sedan 1 21.28 21.28 COSIS 115 223.54
TOTAl. ORAIN JNt.ET 2 .. 1047.12 21.28 115 1;113.4
INSERrS-FOSSII. F .. TERS -
~~------~~ __ c--==========-==========--::----_________ ~.--
-Gi1s ______
I
,
I
I
1-
I
~r
I
I
o 25 50 100
GRAPHICAL SCALE
:
BLDG F.
!'F-40fJ.80
150
BLDG A.
!'F-41UiO
PAD-4Kl92
OLILJU B.
FF--412.aO
PIIJ>vttL72
lP([))§ 71 ~CC([)) HJ§ 7r1J?l [fJCCTrU({)) If!/ IB3lf.'{]lP~
IB3IJ?lJE§§U JFJ~HJCClH/ lL({)) 7r§ 3J$J~3JSW
THERE ARE SEVERAL FACTORS TO BE CONSIDERED WHEN SELECTING COANDA DOWNSPOUT FILTER. COANDA
DOWNPOUT ALTERS ARE AVAILABLE IN SEVERAL STANDARD SIZES AND CAN BE CUSTOM ORDERED. VARIABLES INCLUDE
ANGLE OF THE SCREEN, fWRE SPACING, DOftNSPOUT CONAGURATION (SQUARE ORRECTANGULAR). METHOD OF DEBRIS
CAPTURE, INTERIOR OR EXTERIOR MOUNT, AND FLOW CAPACITY REQUIREMENTS. OPTIONS INCLUDE THE ADDITlON OF A
HYDROCARBON AL 7l?A TlON. .
THE EDGE OF THE SCREEN CREA TES A
SHEARING EFFECT AS WA TER FLOWS ACROSS
THE SURFACE, DIVERllNG WATER lliROUGH THE
SCREEN WHILE DEBRIS SLIDES OFF lliE FACE
OF THE SCREEN.
DOWNSPOUT SIZE FLOW CAPACITY MODEL NUMBER
WATERFLOW
DIRECTION PRIOR
TO FLOfWNG
lliROUGH
WATER FLOW
DIRECTION
lliROUGH
SCREEN(TYP).
AS SHOWN ON lliE LEFT, WATER PASSES
UNIMPEDED THROUGH THE SCREEN WHILE DEBRIS
IS COLLECTED OUTSIDE lliE DOWNSPOUT. DEBRIS
MA Y BE COLLECTED IN A CONTAINER OR BASKET
MOUNTED TO THE SCREEN, OR SIMPLY COLLECTED
FOR MANUAL REMOVAL AT A LATER TIME
THE DOWNSPOUT MA Y BE MOUNTED INSIDE lliE
BUILDING AS SHOWN, OR IF PREFERRED. AGAINST
THE OUTSIDE WALL.
(inches)
4
TOP 14£11'
~ , .,
..., ...,
~
(S
1,i
(gpm) (Interior /Exterior)
175 DFS-4-1 OR E
.
ROOF
•
•
-..... .. ., ..
.bd.' .. , ." ~
DETAIL
•
GAS ____ ""'''s u,. -GAS_ H.P.G. ~
BLDG C.
~ f'AD-<4I2.02
!' .. -~ --
FOSSIL FlL TEA /'
O-G.S-cJ~-11 --t-D --Er--= L
PALO AIRPORT ROAD-IjjI-._---
BLDG D.
FF--413.!J(J
PAD-4t2.92
\I
BLDG E.
.======== ~
=
=
MANHOLE
FLO-GAROn<
INSERT
CATCH
BASIN \
FILTER BODY
FILTER BASKET
FOSSIL ROCK 1M FILTER
MEDIUM POUCH
SIDE VIEW
CATCH
BASIN HANDLES
GUTIER
[FLOWLINE
CURB OPENING
GUnER
FLOWLINE
GASKET"
FLO-GARO
FILTER BODY
3/8" X 3"
ANCHOR BOLT
•
: ~ . (3 PER SECTION)
FILTER
BODY
. ... ;.
•• l 1~'-
'-<---Il. .. ANCHOR DETAIL
REMOVABLE
FILTER BASKET
iii SCALE: NONE
BLDG
fFr.f1VO f'J\D0'!412.12
FOSSIL FlL TEA ~"-!
~~--~ -~ ___ ~-,,'::~' \ GAIIAR sw/iE~:
QUAUTY BASIN
/ / / GATEWAY ROAD II
1/
---.-
NOTES:
I. FLo--CARo'· ALTER BODY SHALL BE MANUFACTURED FROM PE7l?OLEUM RESISTANT
ABERGLASS HHICH MEETS OR EXCEEDS PS 15-69.
2. ALL METAL COMPONENTS SHALL BE STAINLESS STEEL (TYPE 304).
J. REMOVABLE FlL TER BASKET SHALL BE CONSIRUCTED FROM DURABLE POL )PROPYLENE
WO~N MONOfiLAMENT GEOTEXlILE
4. FLO-GARD'" ALTER BODY SHALL BE SECURED TO CATCH BASIN WALL WITH EXPANSION
ANCHOR BOLTS AND WASHER (SEE DETAIL).
5. FLO-GARD" INSERTS ARE AVAILABLE IN 24" OR 30' LENGTH SECTIONS ANO MAY BE
INSTALLED IN VARIOUS COMBINA llONS (END TO END) TO FIT MOST CATCH BASIS Hfillll5.
6. ALTER BASKET MAY BE REMO~D THROUGH CURB OPENING FOR EASE OF MAINTENANCE
7. AL TER MEDIUM SHALL BE FOSSIL ROCK"', IN DISPOSABLE POUCHES, INSTAllED AND
MAINTAINED IN ACCORDANCE Willi MANUFACTURER RECOMMENDA170NS.
8. PROPERTY OWNER SHALL MAINTAIN RLTER IN ACCORDANCE WITH MANUFACTURER
RECOMMENDA TlON5.
FOSSIL FILTER
FLO-GARD
SUPPLEMENTAL INSERT
FOR ON-SIT[ PRIVA T[ CURB OPENING INLET
, , , .. :'f,
DETAIL: COANDA DOWNSPOUT FlL TER (PVT)
INLET
GRAlING
DRAINAGE
INLET-~
NOT TO SCALE
.CARIRIDGE
FOSSIL FIL TEA DETAIL
NOT TO SCALE
INSTALLA nON NOTE:
1. REMOVE INLET GIlA liNG AND MEASURE INSIDE DIMENSION OF INLET.
2. CUT FOSSIL F1L TER CORNER SEC liONS TO APPROPRIA TE LENGTHS .
FOSSIL FlL TER
J. CONNECT CORNER SEClIONS TOGETHER AND SET FOSSIL FlL TER INTO
INLET (RESlING ON BEARING SURFACE.)
4. CUT THE FILTER CARIRIDGE TO FIT FOSSIL FILTER.
5. PLACE END cAp ON ONE END OF FlL TER CARIRIDGE AND FILL UNIT
FROM OPEN END m TH ABSORBENT.
6. PLACE OTHER EIID CAP ON FlL TER CARIRIDGE AND PLACE FILLED
UNIT INTO THE INSTALLED FOSSIL FlL TER. INSTALLA TTON IS COMPLETE.
NOTE:
ALL BUILDINGS TO BE FIITED WITH
COANDA DOWNSPOUT FILTERS
PARTNERS
Plannillg and Engilleering
15938 Bernardo Center Drive
San Diego. CA. 92127
Ph. (858) 376-3444
Fax: (858)376-3555
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