HomeMy WebLinkAboutCT 14-03; BEACHWALK AT MADISON; PRELIMINARY STORMWATER MANAGEMENT PLAN; 2014-09-08MADISON ST
Preliminary Stormwater Management Plan
(Major SWMP)
For
Madison St
CT 14-03
Preparation/Revision Date:
September, 8 2014
Prepared for:
Project Deaf India Foundation
3 Dunn Street
Laguna Niguel, CA 92677
Prepared by:
Brian Ardolino, Project Engineer
Pasco Laret Suiter & Associates
535 N. Highway 101, Suite A
Solana Beach, CA 9207 5
858.259.8212
The selection, sizing, and preliminary design of stonnwater treatment and other control measures in ·
this plan have been prepared under the direction of the following Registered Civil Engineer and meet
the requirements of Regional Water Quality Control Board Order R9-2007~0001 and subsequent
amendments. -~"' :.ff
Brian Ardolino, RCE 71651
' \
Date
Preliminary SWMP-September, 2014
MADISON ST
SECTION I
PROJECT SETTING
PROJECT
LOCATION
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Not to Scale
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Preliminary SWMP-September, 2014
MADISON ST
TABLE 1: PROJECT DESCRIPTION
1. Please provide a brief description of the project.
This project proposes to construct 6 single family residences with associated landscaping and
hardscape improvements and a pervious paver driveway.
2. Describe the current and proposed zoning and land use designation.
The current and proposed zoning and land use designation for the project site is VR-8 and a
general plan designation of V.
3. Describe the pre-project and post-project topography of the project. (Show on Plan)
The existing site has varied topography with elevation ranging from approximately 53.6 feet
on the high point at the northeastern portion of the site, to approximately 48.8 feet at the
southern portion of the site. The existing site is vacant. The proposed drainage pattern
conveys runoff toward Madison St.
4. Describe the soil classification, permeability, erodibility, and depth to groundwater for
LID and Treatment BMP consideration. (Show on Plan) If infiltration BMPs are
proposed, a Geotechnical Engineer must certify infiltration BMPs in Attachment E.
The soil classification onsite is MIC per the Soils Survey prepared by the USDA. The
Hydrologic Group of this soil type is "A".
5. Describe if contaminated or hazardous soils are within the project area. (Show on Plan)
There are no known hazardous or contaminated soils within the project area.
6. Describe the existing site drainage and natural hydrologic features. (Show on Plan).
In the existing condition, stormwater runoff sheet flows west onto Madison St and
eventually discharges into the Buena Vista Lagoon. In the proposed condition, runoff is
collected on the eastern portion of the site and is conveyed on both the north and south
portions of the site in drainage swales ultimately being treated in the proposed BMP
Bioretention areas on the western portion of the site. The treated stormwater will be
conveyed in drainage pipes and discharge onto Madison north directly into Buena Vista
Lagoon.
7. Describe site features and conditions that constrain, or provide opportunities for
stormwater control, such as LID features.
Driveway areas have been designed to meet the minimum widths. Landscaping areas are
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.
Lawn areas, natural vegetation and bioretention areas are proposed to reduce runoff and
maximize infiltration.
8. Is this project within the environmentally sensitive areas as defined on the maps in
Appendix A of the County of San Diego Standard Urban Storm Water Mitigation Plan for
Land Development and Public Improvement Projects?
Yes I No
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Preliminary SWMP-September, 2014
MADISON ST
9. I Is this an emergency project? If yes, please provide a description below.
Yes I No
TABLE 2: CHANNEL& DRAINAGE ANALYSIS
No. CRITERIA YES NO N/A COMMENTS
1. Will the project include work in channels? '1 IfYES go to 2
IfNO go to 13.
2. Will the project increase velocity or IfYES go to 6.
volume of downstream flow?
3. Will the project discharge to unlined If YES go to. 6.
channels?
4. Will the project increase potential sediment IfYES go to 6.
load of downstream flow?
5. Will the project encroach, cross, realign, or If YES go to 8.
cause other hydraulic changes to a stream
that may affect downstream channel
stability?
6. Review channel lining materials and design Continue to 7.
for stream bank erosion.
7. Consider channel erosion control measures Continue to 8.
within the project limits as well as
downstream. Consider scour velocity.
8. Include, where appropriate, energy Continue to 9.
dissipation devices at culverts.
9. Ensure all transitions between culvert Continue to 10.
outlets /headwalls/ wingwalls and channels
are smooth to reduce turbulence and
scour.
10. Include, if appropriate, detention facilities Continue to 11.
to reduce peak discharges.
11. "Hardening" natural downstream areas to Continue to 12.
prevent erosion is not an acceptable
technique for protecting channel slopes,
unless pre-development conditions are
determined to be so erosive that hardening
would be required even in the absence of
the proposed development.
12. Provide other design principles that are Continue to 13.
comparable and equally effective.
13. End '1
Total Project Site Area _ __,0=.2=8"-"'A=-=-"C'--(Acres or ft2)
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Preliminary SWMP-September, 2014
MADISON ST
Estimated amount of disturbed area: 0.28 AC (Acres or ftl
(If >1 acre, you must also provide a WDID number from the SWRCB)
Complete A through C and the calculations below to determine the amount of impervious
surface on your project before and after construction.
A. Total size of project site: 0.28 AC (Acres or ftl
B. Total impervious area (including roof tops) before construction O AC (Acres or ft2)
C. Total impervious area (including roof tops) after construction 0.16 AC (Acres or ft2)
Calculate percent impervious before construction: B/ A= 0%
Calculate percent impervious after construction: C/ A = 57%
TEMPORARY CONSTRUCTION BMPS
--J Silt Fence
'1 Fiber Rolls
--J Street Sweeping and Vacuuming
--J Storm Drain Inlet Protection
'1 Stockpile Management
'1 Solid Waste Management
'1 Stabilized Construction Entrance/Exit
Dewatering Operations
'1 Vehicle and Equipment Maintenance
Desilting Basin
--J Gravel Bag Berm
Sandbag Barrier
--J Material Delivery and Storage
--J Spill Prevention and Control
'1 Concrete Waste Management
W'ater Conservation Practices
--J Paving and Grinding Operations
Any minor slopes created incidental to construction and not subject to a major or minor
grading permit shall be protected by covering with plastic or tarp prior to a rain event,
and shall have vegetative cover reestablished within 180 days of completion of the slope
and prior to final building approval.
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Preliminary SWMP-September, 2014
MADISON ST
SECTION II
APPLICABLE STORM WATER STANDARDS
TABLE 3: PRIORITY STATUS DETERMINATION
Yes No A Housing subdivisions of 10 or more dwelling units. Examples: single-family homes,
D ~ multi-family homes, condominiums, and apartments.
Commercial-greater than one acre. Any development other than heavy industry or
residential. Examples: hospitals; laboratories and other medical facilities; educational
Yes No B institutions; recreational facilities; municipal facilities; commercial nurseries; multi-
D ~ apartment buildings; car wash facilities; mini-malls and other business complexes;
shopping malls; hotels; office buildings; public warehouses; automotive dealerships;
airfields; and other light industrial facilities.
Yes No Heavy industry-greater than one acre. Examples: manufacturing plants, food
D ~ C processing plants, metal working facilities, printing plants, and fleet storage areas (bus,
truck, etc.).
Yes No D Automotive repair shops. A facility categorized in any one of Standard Industrial
D ~ Classification (SIC) codes 5013, 5014, 5541, 7532-7534, or 7536-7539.
Restaurants. Any facility that sells prepared foods and drinks for consumption,
including stationary lunch counters and refreshment stands selling prepared foods and
Yes No drinks for immediate consumption (SIC code 5812), where the land area for
D ~ E development is greater than 5,000 sqGare feet. Restaurants where land development is
less than 5,000 square feet shall meet all SUSMP requirements except for structural
treatment BMP and numeric sizing criteria requirements and hydromodification
requirements.
Hillside development greater than 5,000 square feet. Any development that creates
Yes No F 5,000 square feet of impervious surface and is located in an area with known erosive
D ~ soil conditions, where the development will grade on any natural slope that is twenty-
five percent or greater.
Environmentally Sensitive Areas (ESAs). All development located within or directly
adjacent to or discharging directly to an ESA (where discharges from the development
or redevelopment will enter receiving waters within the ESA), which either creates
Yes No 2,500 square feet of impervious surface on a proposed project site or increases the
D ~ G area of imperviousness of a proposed project site to 10% or more of its naturally
occurring condition. "Directly adjacent" means situated within 200 feet of the ESA.
"Discharging directly to" means outflow from a drainage conveyance system that is
composed entirely of flows from the subject development or redevelopment site, and
not com..'llingled with flows from adjacent lands.
Yes No I I Parking lots 5,000 square feet or more or with 15 or more parking spaces and
D ~ potentially exposed to urban runoff.
Yes No Street, roads, highways, and freeways. Any paved surface that is 5,000 square feet or
D ~ I greater used for the transportation of automobiles, trucks, motorcycles, and other
vehicles.
Yes No J Retail Gasoline Outlets (RGOs) that are: (a) 5,000 square feet or more or (b) a
D ~ projected Average Daily Traffic (ADT) of 100 or more vehicles per day.
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Preliminary SWMP-September, 2014
MADISON ST
TABLE 4: EXCEPTIONAL THREAT TO WATER QUALITY DETERMINATION
No. CRITERIA YES NO INFORMATION
1. Is all or part of the proposed project site within 200 feet -v If YES, continue to
of waters named on the Clean Water Act (CWA) Section 2.
303(d) list of Water Quality Limited Segments as impaired If NO, go to 5.
for sedimentation and/ or turbidity?
2. Will the project disturb more than 5 acres, including all If YES, continue to
phases of the development? 3.
If NO, go to 5.
3. Will the project disturb slopes that are steeper than 4:1 If YES, continue to
(horizontal: vertical) with at least 10 feet of relief, and that 4.
drain toward the 303( d) listed receiving water for If NO, go to 5.
sedimentation and/ or turbidity?
4. Will the project disturb soils with a predominance of IfYES, continue to
USDA-NRCS Erosion factors kf greater than or equal to 6.
0.4? If NO, go to 5.
5. Project is not required to use Advanced Treatment BMPs. -v Document for
Project Files by
referencing this
checklist.
TABLE 5: HYDROMODIFICATION DETERMINATION
QUESTIONS YES NO Information
1. Will the project reduce the pre-project -v IfNO, continue to 2.
impervious area and are the unmitigated IfYES, go to 7.
post-project outflows ( outflows without
detention routing) to each outlet location
less as compared to the pre-project
condition?
2. Would the project site discharge runoff -v If NO, continue to 3.
directly to an exempt receiving water, such IfYES, go to 7.
as the Pacific Ocean, San Diego Bay, an
exempt reservoir, or a tidally-influenced
area?
3. Would the project site discharge to a -v IfNO, continue to 4.
stabilized conveyance system, which has the IfYES, go to 7.
capacity for the ultimate Qw, and extends to
the Pacific Ocean, San Diego Bay, a tidally-
influenced area, an exempt river reach or
reservoir?
4. Does the contributing watershed area to -v IfNO, continue to 5.
which the project discharges have an IfYES, go to 7.
impervious area percentage greater than 70
percent?
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Preliminary SWMP -September, 2014
MADISON ST
5. Is this an urban infill project which ..J IfNO, continue to 6.
discharges to an existing hardened or IfYES, go to 7.
rehabilitated conveyance system that
extends beyond the "domain of analysis,"
where the potential for cumulative impacts
in the watershed are low, and the ultimate
receiving channel has a "Low" susceptibility
to erosion as defined in the SCCWRP
channel assessment tool?
6. Project is required to manage ..J Reference
hydromodification imp:icts. "H ydromodification
Applicability
Determination" of the
City of Carlsbad
SUSMP .
7. Project is not required to manage ..J
hydromodification impacts.
Per the Hydromodification Exemption Analysis for Select Carlsbad Watersheds, dated June
10, 2013, by Wayne W. Chang, this property is exempt from hydromodification
requirements.
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Preliminary SWMP-September, 2014
MADISON ST
SECTION III
IDENTIFY POLLUTANTS OF CONCERN
WATERSHED
San Juan 901 Santa Margarita 902 San Luis Rey 903 ,J Carlsbad 904
San Dieguito 905 Penasquitos 906 San Diego 907 Sweetwater 909
Otay 910 Tijuana 911 Whitewater 719* Clark 720*
West Salton 721 * Anza Borrego 722* Imperial 723*
http://www.waterboards.ca.gov/sandiego /water issues/programs /basin plan/index.shtml
HYDROLOGIC SUB-AREA NAME AND BASIN NUMBER{S)
Basin Number Sub-Area Name
904.21 Buena Vista Creek, El Salta Subarea
http://www.waterboards.ca.gov/sand1ego I water issues /programs /basin plan /index.shtml
SURFACE WATERS th h at eac proJect di h sc arge point proposes to di h sc arge to.
lmpairment(s) listed [303(d) listed
SURFACE WATERS Hydrologic waters or waters with established Distance to
(river, creek, stream, etc.) Unit Basin TMDLs ]. List the impairments Project
Number identified in Table 7.
Buena Vista Creek 904.21 Sediment Toxicity 0.2 Miles
Buena Vista Lagoon 904.21 Indicator Bacteria 1.2 mile
http://www.waterboards.ca.gov/water issues /programs /tmdl/docs/303dlists2006 /epa/r9 06 303d reqtmdl
s.pdf
GROUND WATERS
Ground Waters Hydrologic u ::r: ::;s 0 0 ~ Unit Basin z p:: ~ [/J ~ -N ...-l p:: 0 0 ~ u u 0 ...-l ...-l p:: ~ c.., z p:: 0 ~ ~ ~ 0 ~ ~ Number ::;s ..... -< ..... p... µ... p... p:: p:: i:o u
• • • Buena Vista Creek 904.21
http://www.waterboards.ca.gov/sandiego /water issues /programs /basin plan /index.shtml
+ Excepted from Municipal • Existing Beneficial Use o Potential Beneficial Use
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Preliminary SWMP-September, 2014
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-
MADISON ST
PROJECT ANTICIPATED AND POTENTIAL POLLUTANTS
Using Table 6, identify pollutants that are anticipated to be generated from the proposed
priority project categories. Pollutants associated with any hazardous material sites that have
been remediated or are not threatened by the proposed project are not considered a
pollutant of concern.
TABLE 6: ANTICIPATED AND POTENTIAL POLLUTANTS GENERATED BY
LAND USE TYPE
PDP
Categories
Detached
Residential
Development
Commercial
Development 1
acre or greater
Heavy industry
/industrial
development
Automotive Repair
Shops
Restaurants
Hillside
Development
>5,000 ft2
Parking Lots
Retail Gasoline
Outlets
Streets, Highways
& Freeways
X = anticipated
P = potential
Sediments Nutrients
X X
p(1) p(1)
X
X X
p(l) p(l)
X p(l)
Heavy
Metals
X
X
X
X
X
General Pollutant Categories
Organic Trash & Oxygen
Demanding Compounds Debris Substances
X X
p(2) X p(S)
X X X
xc4icsi X
X X
X X
X p(l)
X X X
x<4) X p(S)
(1) A potential pollutant if landscaping exists on-site.
(2) A potential pollutant if the project includes uncovered parking areas.
(3) A potential pollutant if land use involves food or animal waste products.
( 4) Including petroleum hydrocarbons.
(5) Including solvents.
10
Oil& Bacteria
& Grease Viruses
X X
X p(3)
X
X
X X
X
X
X
X
Preliminary SWMP-September, 2014
Pesticides
X
p(S)
X
p(l)
MADISON ST
PROJECT POLLUTANTS OF CONCERN SUMMARY TABLE
TABLE 7: PROJECT POLLUTANTS OF CONCERN
Pollutant Category Anticipated Potential Surface Water Impairments (X) (P)
Sediments X Sedimentation/Siltation
Nutrients X
Heavy Metals
Organic Compounds
Trash & Debris X
Oxygen Demanding p Substances
Oil& Grease p
Bacteria & Viruses p Bacteria
Pesticides X
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Preliminary SWMP-September, 2014
MADISON ST
SECTION IV
SOURCE CONTROL MEASURES
TABLE 8: PROJECT SOURCE CONTROL BMPS
Potential source of Permanent Operational
runoff pollutants source control BMPs source control BMPs
Landscape/ Outdoor Preserve existing native Maintain landscaping using
Pesticide Use trees, shrubs, and ground minimum or no pesticides
cover to the maximum extent Provide IPM infonnation to possible. new owners, lessees and
Design landscaping to operators.
minimize irrigation and
runoff, to promote surface
infiltration where
appropriate, and to minimize
the use of fertilizers and
pesticides that can
contribute to stonnwater
pollution.
Refuse areas State how site refuse will be Provide adequate number of
handled and provide receptacles. Inspect
supporting detail to what is receptacles regularly; repair or
shown on plans. replace leaky receptacles.
Keep receptacles covered.
Prohibit/prevent dumping of
If dumpsters or other liquid or hazardous wastes.
receptacles are outdoors, Post "no hazardous
show how the designated materials" signs. Inspect and
area will be covered, graded, pick up litter daily and clean
and paved to prevent run-on up spills immediately. Keep
and show locations of benns spill control materials
to prevent runoff from the available on-site. See Fact
area. Sheet SC-34, ''Waste
Handling and Disposal" in
the CASQA Stonnwater
Quality Handbooks at
www.cabmnhandbooks.com
Roofing, gutters, and Avoid roofing, gutters, and
trim. trim made of copper or other
unprotected metals that may
leach into runoff
Plazas, sidewalks, and Plazas, sidewalks, and
parking lots parking lots shall be swept
regularly to prevent the
accumulation of litter and
debris. Debris from pressure
washing shall be collected to
prevent entry into the storm
drain system. Washwater
containing any cleaning agent
or degreaser shall be collected
and discharged to the sanitary
sewer and not discharged to a
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Preliminary SWMP-September, 2014
MADISON ST
storm drain.
Fire Sprinkler Test Provide means to drain fire See the note in Fact Sheet SC-
Water sprinkler test water to the 41, "Building and Grounds
sanitary sewer. Maintenance," in the CASQA
Stonnwater Quality
Handbooks at
www.cabmnhandbooks.com
See Table 8 for proposed source control BMP's applicable to this project.
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Preliminary SWMP-September, 2014
MADISON ST
IF TI-IESE SOURCES \'\lLL BE ... THEN YOUR STORMW ATER CONTROL PLAN SHOULD INCLUDE TI-IESE SOURCE CONTROL BMPs ON THE PROJECT SITE .
I 2 3 4
Potentia1 Sources of Permanent Controls--Show on Source Control Permanent Controls-List in Table 9 and Narrative Operational BMPs--lnclude in
Runoff Pollutants-List in Table 9 Exhibit, Attachment B Table 9 and Narrative
D . \. On-site storm drain D Locations of inlets . D Mark all inlets with the words "No D Maintain and periodically repaint or
inlets Dumping! Flows to Bay" or similar replace inlet markings.
where feasible. D Provide stormwater pollution
prevention information to new site
owners, lessees, or operators.
D See applicable operational BMPs in
Fact Sheet SC-44, "Drainage System
Maintenance," in the CASQA
Stormwater Quality Handbooks at
www.i;i1hm12h!1nd!;mQ~,i;Qm
D Include the following in lease
agreements: "Tenant shall not allow
anyone to discharge anything to
storm drains or to store or deposit
materials so as to create a potential
discharge to storm drains."
D B Interior floor drains D State that interior floor drains and D Inspect and maintain drains to
and elevator shaft sump elevator shaft sump pumps will be prevent blockages and overflow.
pumps plumbed to sanitary sewer.
D c. Interior parking " State that parking garage floor drains " Inspect and maintain drains to
garages will be plumbed to the sanitary sewer. prevent blockages and overflow.
D DL Need for future D Note building design features that D Provide Integrated Pest Management
indoor & structural pest discourage entry of pests. information to owners, lessees, and
control operators.
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Preliminary SWMP-September, 2014
MADISON ST
IF THESE SOURCES \'\1LL BE ... THEN YOUR STORI\1\VATER CONTROL PLAN SHOULD INCLUDE TI IESE SOURCE CONTROL Bl\1Ps ON THE PROJECT SITE .
1 2 3 4
Potential Sources of Permanent Cont:rols--Show on Source Control Permanent Controls-List in Table 9 and Narrative Operational BMPs--Include in
Runoff Pollutants-List in Table 9 Exhibit, Attachment B Table 9 and NarratiYe
~ D2. Landscape/ [J Show locations of native trees or State that final landscape plans will ~ Maintain landscaping using
Outdoor Pesticide Use areas of shrubs and ground cover to accomplish all of the following: minimum or no pesticides.
r'foti:; Sh11uld bi: be undisturbed and retained. ~ Preserve existing native trees, shrubs, [J See applicable operational BMPs in
cogsisti:nl mth i;1rQj1:i;1 [J Show self-retaining landscape and ground cover to the maximum Fact Sheet SC-41, "Building and
lm!!scill!e i;1lm (if areas, if any. extent possible. Grounds Maintenance," in the
ai;1i;11icable). ~ Show stormwater treatment ~ Design landscaping to minimize CASQA Stormwater Quality
facilities. irrigation and runoff, to promote Handbooks at
surface infiltration where appropriate, www.cabmphan!!b11oks.com
and to minimize the use of fertilizers ~ Provide 1PM information to new
and pesticides that can contribute to owners, lessees and operators.
stormwater pollution.
[J Where landscaped areas are used to
retain or detain stormwater, specify
plants that are tolerant of saturated
soil conditions.
[J Consider using pest-resistant plants,
especially adjacent to hardscape.
[J To insure successful establishment,
select plants appropriate to site soils,
slopes, climate, sun, wind, rain, land
use, air movement, ecological
consistency, and plant interactions.
Cl E. Pools, spas, ponds, [J Show location of water feature and [J If the local municipality requires pools [J See applicable operational BMPs in
decorative fountains, a sanitary sewer cleanout in an to be plumbed to the sanitary sewer, Fact Sheet SC-72, "Fountain and
and other water accessible area within 10 feet. place a note on the plans and state in Pool Maintenance," in the CASQA
features. the narrative that this connection will Stormwater Quality Handbooks at
be made according to local www.i;abmphandboQk5.cQm
requirements.
15
Preliminary SWMP -September, 2014
MADISON ST
IF IBESE SOURCES \'OLL BE ... IBEN YOUR STORMW ATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs ON IBE PROJECT SITE .
1 2 3 4
Potential Sources of Permanent Contmls---Show on Source Control Permanent Controls-List in Table 9 and Nanattve Operational BMPs---Include in
Runoff Pollutants-List in Table 9 Exhibit, Attachment B Table 9 and N arntive
a F. Food service a For restaurants, grocery stores, and a Describe the location and features of a
other food service operations, sbow the designated cleaning area.
location (indoors or in a covered a Describe the items to be cleaned in area outdoors) of a floor sink or this facility and how it has been sized other area for cleaning floor mats, to insure that the largest items can be containers, and equipment. accommodated. a On the drawing, show a note that
this drain will be connected to a
grease interceptor before
discharging to the sanitary sewer .
...J G. Refuse areas ...J Show where site refuse and ...J State how site refuse will be handled ...J State how the following will be
recycled materials will be handled and provide supporting detail to what implemented:
and stored for pi::kup. See local is shown on plans. Provide adequate number of municipal requirements for sizes a State that signs will be posted on or receptacles. Inspect receptacles and other details of refuse areas. near dumpsters with the words "Do regularly; repair or replace leaky
...J If dumpsters or other receptacles not dump hazardous materials here" receptacles. Keep receptacles
are outdoors, show how the or similar. covered. Prohibit/prevent dumping
designated area will be covered, of liquid or hazardous wastes. Post
graded, and paved to prevent run-"no hazardous materials" signs.
on and show locations of berms to Inspect and pick up litter daily and
prevent runoff from the area. clean up spills immediately. Keep
a Any drains from dumpsters, spill control materials available on-
compactors, and tallow bin areas site. See Fact Sheet SC-34, ''Waste
shall be connected to a grease Handling and Disposal" in the
removal device before discharge to CASQA Stormwater Quality
sanitary sewer. Handbooks at
www,i;abm12handh2oks,!;Qm
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Preliminary SWMP-September, 2014
MADISON ST
IF THESE SOURCES \'\1LL BE ... THEN YOUR STORJ\!\V ATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL Blvfi's ON THE PROJECT SITE .
1 2 3 4
Potential Sources of Permanent Controls--Show on Source Control Permanent Controls-List in Table 9 and Nauat1Ve Operat10nal BMPs----Include in
Runoff Pollutants-List in Table 9 Exhibit, Attachment B Table 9 and N arratiYe
[J H. Industrial processes. [J Show process area. [J If industrial processes are to be D See Fact Sheet SC-10, "Non-
located on site, state: "All process Stormwater Discharges" in the
activities to be performed indoors. No CASQA Stormwater Quality
processes to drain to exterior or to Handbooks at
storm drain system." www.~11bm11handb!!!!k§ i;Qm
[J I. Outdoor storage of [J Show any outdoor storage areas, D Include a detailed description of [J See the Fact Sheets SC-31, "Outdoor
equipment or materials. including how materials will be materials to be stored, storage areas, Liquid Container Storage" and SC-
(See rows J and K for covered. Show how areas will be and structural features to prevent 33, "Outdoor Storage of Raw
source control graded and bermed to prevent run-pollutants from entering storm drains. Materials " in the CASQA
measures for vehicle on or run-off from area. Where appropriate, reference Stormwater Quality Handbooks at
cleaning, repair, and [J Storage of non-hazardous liquids documentation of compliance with the www.~i!bm11h.indbQQk§,!;Qm
maintenance.) shall be covered by a roof and/ or requirements oflocal Hazardous
drain to the sanitary sewer system, Materials Programs for:
and be contained by berms, dikes, . Hazardous Waste Generation liners, or vaults.
[J . Hazardous Materials Release Storage of hazardous materials and Response and Inventory wastes must be in compliance with
the local hazardous materials . California Accidental Release
ordinance and a Hazardous (CalARP)
Materials Management Plan for the • Aboveground Storage Tank site. . Uniform Fire Code Article 80
Section 103(b) & (c) 1991 . Underground Storage Tank
17
Preliminary SWMP-September, 2014
.,...,
MADISON ST
IF TI-IESE SOURCES \'\1LL BE ... 11-IEN YOUR STORM\VATER CONTROL PLAN SHOULD INCLUDE TI-IESE SOURCE CONTROL BMPs ON TI-IE PROJECT SITE ..
1 2 3 4
Potential Sources of Permanent Contro1s---Show on Source Control Permanent Cont-rols--List in Table 9 and Narrative Operational BMPs--Indude in
Runoff Pollutants-Lst m Table 9 Exhibit, Attachment B Table 9 and Narrative
a J. Vehicle and a Show on drawings as appropriate: a If a car wash area is not provided, Describe operational measures to
Equipment Cleaning (1) Commercial/industrial facilities describe measures taken to discourage implement the following (if
having vehicle / equipment on-site car washing and explain how applicable):
cleaning needs shall either provide these will be enforced. a Washwater from vehicle and
a covered, bermed area for washing equipment washing operations shall
activities or discourage not be discharged to the storm drain
vehicle/equipment washing by system.
removing hose bibs and installing a Car dealerships and similar may signs prohibiting such uses. rinse cars with water only,
(2) Multi-dwelling complexes shall a See Fact Sheet SC-21, ''Vehicle and have a paved, bermed, and covered Equipment Cleaning," in the CASQA car wash area (unless car washing Stormwater Quality Handbooks at is prohibited on-site and hoses are www.cabmphandbooks.com provided with an automatic shut-
off to discourage such use).
(3) Washing areas for cars, vehicles,
and equipment shall be paved,
designed to prevent run-on to or
runoff from the area, and plumbed
to drain to the sanitary sewer.
(4) Commercial car wash facilities
shall be designed such that no
runoff from the facility is
discharged to the storm drain
system. Wastewater from the
facility shall discharge to the
sanitary sewer, or a wastewater
reclamation system shall be
installed.
18
Preliminary SWMP-September, 2014
MADISON ST
IF THES£ SOURCES \,1LL BE ... THEN YOUR STORM\VATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL Bl\fPs ON THE PROJECT SITE .
1 2 3 4
Potential Sources of Permanent Controls--ShO\v on Source Control Permanent Controls-List in Table 9 and Narrative Operational Bl\fPs--lnclude in
Runoff Pollutants -List in Table 9 Exhibit, Attachment B Table 9 and N arratwe
D K. Vehicle/Equipment D Accommodate all vehicle D State that no vehicle repair or In the SUSMP report, note that all of
Repair and equipment repair and maintenance maintenance will be done outdoors, or the following restrictions apply to use
Maintenance indoors. Or designate an outdoor else describe the required features of the site:
work area and design the area to the outdoor work area. D No person shall dispose of, nor prevent run-on and runoff of D State that there are no floor drains or if pennit the disposal, directly or storm.water. there are floor drains, note the agency indirectly of vehicle fluids, hazardous
D Show secondary containment for from which an industrial waste materials, or rinsewater from parts
exterior work areas where motor discharge pennit will be obtained and cleaning into storm drains.
oil, brake fluid, gasoline, diesel that the design meets that agency's No vehicle fluid removal shall be fuel, radiator fluid, acid-containing requirements. performed outside a building, nor on batteries or other hazardous D
materials or hazardous wastes are D State that there are no tanks, asphalt or ground surfaces, whether
used or stored. Drains shall not be containers or sinks to be used for parts inside or outside a building, except
installed within the secondary cleaning or rinsing or, if there are, note in such a manner as to ensure that
the agency from which an industrial any spilled fluid will be in an area of contaitunent areas. waste discharge pennit will be secondary containment. Leaking
D Add a note on the plans that states obtained and that the design meets vehicle fluids shall be contained or
either (1) there are no floor drains, that agency's requirements. drained from the vehicle
or (2) floor drains are connected to inunediately.
wastewater pretreatment systems No person shall leave unattended prior to discharge to the sanitary drip parts or other open containers sewer and an industrial waste D
discharge pennit will be obtained. containing vehicle fluid, unless such
containers are in use or in an area of
secondary containment.
19
Preliminary SWMP-September, 2014
MADISON ST
IF 1HESE SOURCES \'\1LL BE ... 1HEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE 1HESE SOURCE CONTROL Bl\fPs ON THE PROJECT SITE ..
1 2 3 4
Potentia1 Sources of Permanent Controls--Show on Source Control Permanent Controls-List in Table 9 and Narrative Operatmnal Bl\fPs--lnclude in
Runoff Pollutants-List in Table 9 Exhibit, Attachment B Table 9 and NarratiYe
a L. Fuel Dispensing a Fueling areas• shall have a The property owner shall dry sweep
Areas impermeable floors (i.e., portland the fueling area routinely.
cement concrete or equivalent a See the Business Guide Sheet, smooth impervious surface) that "Automotive Service-Service are: a) graded at the minimum Stations" in the CASQA Stormwater slope necessary to prevent ponding; Quality Handbooks at and b) separated from the rest of www.cabmphandbooks.com the site by a grade break that
prevents run-on of stormwater to
the maximum extent practicable.
Fueling areas shall be covered by a
a canopy that extends a minimum of
ten feet in each direction from each
pump. [Alternative: The fueling
area must be covered and the
cover's minimum dimensions must
be equal to or greater than the area
within the grade break or fuel
dispensing area'.] The canopy [or
cover] shall not drain onto the
fueling area.
1 The fueling area shall be defined as the area extending a minimum of 6.5 feet from the comer of each fuel dispenser or the length at which the hose and nozzle assembly may be operated
plus a n...inimum of one foot, whichevtt is greater.
20
Preliminary SWMP-September, 2014
MADISON ST
IF TI IESE SOURCES \'\11.L BE ... THEN YOUR STORM\VATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs ON THE PROJECT SITE .
1 2 3 4
Potential Sources of Permanent Controls---Show on Source Control Permanent Controls-List in Table 9 and Naffattve Operatmnal BMPs-Include in
Runoff Pollutants -ust in Table 9 Exhibit, Attachment B Table 9 and N arratiYe
CJ M. Loading Docks CJ Show a preliminary design for the CJ Move loaded and unloaded items
loading dock area, including indoors as soon as possible.
roofing and drainage. Loading CJ See Fact Sheet SC-30, "Outdoor docks shall be covered and/ or Loading and Unloading," in the graded to minimize run-on to and CASQA Stormwater Quality runoff from the loading area. Roof Handbooks at downspouts shall be positioned to www.cabmphandbooks.com direct stormwater away from the
loading area. Water from loading
dock areas should be drained to the
sanitary sewer where feasible.
Direct connections to storm drains
from depressed loading docks are
prohibited.
CJ Loading dock areas draining
directly to the sanitary sewer shall
be equipped with a spill control
valve or equivalent device, which
shall be kept closed during periods
of operation.
CJ Provide a roof overhang over the
loading area or install door skirts
( cowling) at each bay that enclose
the end of the trailer.
-./ N. Fire Sprinkler Test -./ Provide a means to drain fire sprinkler -./ See the note in Fact Sheet SC-41,
Water test water to the sanitary sewer. "Building and Grounds
Maintenance," in the CASQA
Stormwater Quality Handbooks at
www.cabmphandbooks.com
21
Preliminary SWMP -September, 2014
MADISON ST
IF TI-IESE SOURCES \'OLL BE ... TI-IEN YOUR STORM\VATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs ON THE PROJECT SITE .
1 2 3 4
Potential Sources of Permanent Control~hmv on Source Control Permanent Controls-List in Table 9 and Narrative Operational BMPs--Include in
Runoff Pollutants -List in Table 9 Exhibit, Attachment B Table 9 and Narrative
0. Miscellaneous Drain CJ Boiler drain lines shall be directly or
or Wash Water indirectly connected to the sanitary
CJ Boiler drain lines sewer system and may not discharge
to the storm drain system.
CJ Condensate drain lines CJ Condensate drain lines may discharge
CJ Rooftop equipment to landscaped areas if the flow is small
CJ Drainage sumps enough that runoff will not occur.
...J R:,ofing, gutters, and Condensate drain lines may not
trim. discharge to the storm drain system.
Rooftop mounted equipment with
CJ potential to produce pollutants shall
be roofed and/ or have secondary
containment.
Any drainage sumps on-site shall
CJ feature a sediment sump to reduce the
quantity of sediment in pumped water.
Avoid roofing, gutters, and trim made
...J of copper or other unprotected metals
that may leach into runoff.
...J P. Plazas, sidewalks, ...J Plazas, sidewalks, and parking lots
and parking lots. shall be swept regularly to prevent
the accumulation of litter and debris.
Debris from pressure washing shall
be collected to prevent entry into the
storm drain system. Washwater
containing any cleaning agent or
degreaser shall be collected and
discharged to the sanitary sewer and
not dischare:ed to a storm drain.
22
Preliminary SWMP-September, 2014
MADISON ST
SECTIONV
LOW IMPACT DEVELOPMENT (LID) DESIGN STRATEGIES
TABLE 9: LID AND SITE DESIGN
1. Conserve natural Areas, Soils, and Vegetation
-V Preserve well draining soils (Type A or B)
-,J Preserve Significant Trees
-,J Preserve critical (or problematic) areas such as floodplains, steep slopes, wetlands,
and areas with erosive or unstable soil conditions
Other. Description:
2. Minimize Disturbance to Natural Drainages
-,J Set-back development envelope from drainages
-,J Restrict heavy construction equipment access to planned green/ open
space areas
Other. Description:
3. Minimize and Disconnect Impervious Surfaces (see 5)
Clustered Lot Design
-,J Items checked in 5
Other. Description:
4. Minimize Soil Compaction
-,J Restrict heavy construction equipment access to planned green/ open
space areas
-,J Re-till soils compacted by construction vehicles/ equipment
-,J Collect & re-use upper soil layers of development site containing organic
materials
Other. Description:
5. Drain Runoff from Impervious Surfaces to Pervious Areas
LID Street & Road Desiim
-,J Curb-cuts to landscaping
Rural Swales
Concave Median
Cul-de-sac Landscaping Design
Other. Description:
23
Preliminary SWMP -September, 2014
0
MADISON ST
LID ParkinP-Lot DesiP-n
Permeable Pavements
Curb-cuts to landscaping
Other. Description:
LID Drivewav Sidewalk Bike-nath DesiP-n
...J Permeable Pavements
...J Pitch pavements toward landscaping
Other. Description:
LID BuildinP-Desio-ti
Cisterns & Rain Barrels
Downspout to swale or landscaping
Vegetated Roofs
Other. Description:
LID LandscaninP-Desin-n
...J Soil Amendments
...J Reuse of Native Soils
...J Smart Irrigation Systems
Street Trees
Other. Description:
6. Minimize erosion from slopes
...J Disturb existing slopes only when necessary
...J Minimize cut and fill areas to reduce slope lengths
...J Incorporate retaining walls to reduce steepness of slopes or to shorten slopes
Provide benches or terraces on high cut and fill slopes to reduce concentration
of flows
...J Rounding and shaping slopes to reduce concentrated flow
...J Collect concentrated flows in stabilized drains and channels
Other. Description:
24
Preliminary SWMP-September, 2014
MADISON ST
SECTION VI
INTEGRATED MANAGEMENT PRACTICES
TABLE 10: GROUPING OF POTENTIAL POLLUTANTS OF CONCERN (POCS) BY
FA TE DURING STORM\'v ATER TREATMENT
Pollutant Check Coarse Sediment and Trash Pollutants that tend Pollutants that tend
Project to associate with to be dissolved
Specific fine particles during following treatment
PO Cs treatment
Sediment X X X
Nutrients X X
Heavy Metals X
Oq~anic Compounds X
Trash & Debris X
OxvP-en Demanding X
Bacteria X X
Oil & Grease X
Pesticides X
TABLE 11: GROUPS OF POLLUTANTS AND RELATIVE EFFECTIVENESS OF
TREATMENT FACILITIES
Pollutants of Settling Wet Ponds Infiltration Media Higher- Higher-Trash Racks Vegetated
Concern Basins and DeYiccs l'ilters rate rate & Hydro Swales
(Dry Constructed (LID) bin filters media -dynamic
Ponds Wetlands filters Devices
Coarse High Iligh High High Iligh High High High
Sediment
and Trash
Pollutants High High High High Medium :\fcdium Low Medium
that tend to
associate
with fine
particles
during
treatment
Pollutants Low Medium High Low Low J,ow Low Low
that tend to
be dissolved
following
treatment
25
Preliminary SWMP-September, 2014
MADISON ST
TABLE 12: PROJECT LID AND TC-BMPS
LID and TC-BMP Type Water Quality Hydromodification
Treatment Only Flow Control
Bioretention Facilites (LID)
..J Bioretention area X X
Flow-through Planter
Cistern with Bioretention
Settling Basins (Dry Ponds)
Extended/ dry detention basin with
grass/vegetated lining
Extended/ dry detention basin with impervious
lining
Infiltration Devices (LID)
D Infiltration basin
Infiltration trench
Other
Wet Ponds and Constructed Wetlands
Wet pond/basin (permanent pool)
Constructed wetland
Vegetated Swales (LID<1>)
Vegetated Swale
Media Filters
Austin Sand Filter
Delaware Sand Filter
Multi-Chambered Treatment Train (MCTT)
Higher-rate Biofilters
Tree-pit-style unit
Other
Higher-rate Media Filters
Vault-based filtration unit with replaceable
cartridges
Other
Hydrodynamic Separator Systems
Swirl Concentrator
Cyclone Separator
Trash Racks
Catch Basin Insert
Catch Basin Insert w / Hydrocarbon boom
Other
26
Preliminary SWMP-September, 2014
MADISON ST
Bioretention areas were chosen for their removal efficiencies, construction ease, low cost to·
maintain and construct and their ability to function properly even with very minimal
maintenance and care. The bioretention areas were chosen as a means of mitigating peak
flows as well serving as a settling basin and are also designed to meet hydromodification
criteria.
27
Preliminary SWMP-September, 2014
MADISON ST
SECTION VII
TREATMENT CONTROL BMP'S
NOT APPLICABLE WITH IMP SIZING APPROACH ...
28
Preliminary SWMP-September, 2014
MADISON ST
SECTION VII
HYDROMODIFICATION
NOT APPLICABLE WITH IMP SIZING APPROACH ...
29
Preliminary SWMP-September, 2014
MADISON ST
SECTION IX
DOCUMENTATION OF STORM WATER DESIGN FOR IMP APPROACH
30
Preliminary SWMP-September, 2014
MADISON ST
SECT I ON VIII
BMP FACILITY MAINTENANCE REQUIREMENTS
~ Responsible Party for Long-term Maintenance:
Representative Name: GeoffMcComic
Company Name: Project Deaf India Foundation
Phone Number 619.481.3830
Street Address: 1818 First Ave, Suite 100
City/State/Zip: San Diego, CA 92131
Email Address: gmccomic@vestapacificdevelopment.com
~ Funding Source: I Pmject Deaf India foundation
Bioretention Operation and Maintenance
The operational and maintenance needs of a Bioretention Area are:
The primary maintenance requirement for bioretention areas is that of inspection and repair
or replacement of the treatment area's components. Generally, this involves nothing more
than the routine periodic maintenance that is required of any landscaped area. Plants that are
appropriate for the site, climatic, and watering conditions should be selected for use in the
bioretention cell. Appropriately selected plants will aide in reducing fertilizer, pesticide,
water, and overall maintenance requirements. Bioretention system components should blend
over time through plant and root growth, organic decomposition, and the development of a
natural soil horizon. These biologic and physical processes over time will lengthen the
facility's life span and reduce the need for extensive maintenance.
Routine maintenance should include a biannual health evaluation of the trees and shrubs and
subsequent removal of any dead or diseased vegetation (EPA, 1999). Diseased vegetation
should be treated as needed using preventative and low-toxic measures to the extent
possible.
BMPs have the potential to create very attractive habitats for mosquitoes and other vectors
because of highly organic, often heavily vegetated areas mixed with shallow water. Routine
inspections for areas of standing water within the BMP and corrective measures to restore
proper infiltration rates are necessary to prevent creating mosquito and other vector habitat.
In addition, bioretention BMPs are susceptible to invasion by aggressive plant species such
as cattails, which increase the chances of water standing and subsequent vector production if
not routinely maintained.
31
Preliminary SWMP-September, 2014
MADISON ST
In order to maintain the treatment area's appearance it may be necessary to prune and weed.
Furthermore, mulch replacement is suggested when erosion is evident or when the site
begins to look unattractive. Specifically, the entire area may require mulch replacement every
two to three years, although spot mulching may be sufficient when there are random void
areas. Mulch replacement should be done prior to the start of the wet season. New Jersey's
Department of Environmental Protection states in their bioretention systems standards that
accumulated sediment and debris removal ( especially at the inflow point) will normally be
the primary maintenance function. Other potential tasks include replacement of dead
vegetation, soil pH regulation, erosion repair at inflow points, mulch replenishment,
unclogging the underdrain, and repairing overflow structures. There is also the possibility
that the cation exchange capacity of the soils in the cell will be significantly reduced over
time. Depending on pollutant loads, soils may need to be replaced within 5-10 years of
construction.
Functional Maintenance
Functional maintenance has two components:
Preventive maintenance
Corrective maintenance
Preventive Maintenance
Preventive maintenance activities to be instituted at a Bioretention Area are:
• Trash and Debris. During each inspection and maintenance visit to the site,
debris and trash removal will be conducted to reduce the potential for inlet and
outlet structures and other components from becoming clogged and
inoperable during storm events.
• Sediment Removal. Sediment accumulation, as part of the operation and
maintenance program at a Swale, will be monitored once a month during the
dry season, after every large storm (0.50 inch), and monthly during the wet
season. Specifically, if sediment reaches a level at or near plant height, or could
interfere with flow or operation, the sediment will be removed. If
accumulation of debris or sediment is determined to be the cause of decline in
design performance, prompt action (i.e., within ten working days) will be taken
to restore the Swale to design performance standards. Removal of Standing
Water. Standing water must be removed if it contributes to the development of
aquatic plant communities or mosquito breeding areas.
• Fertilization and Irrigation. The vegetation seed mix has been designed so that
fertilization and irrigation is not necessary. Fertilizers and irrigation will not be
used to maintain the vegetation.
32
Preliminary SWMP-September, 2014
MADISON ST
• Elimination of Mosquito Breeding Habitats. The most effective mosquito
control program is one that eliminates potential breeding habitats.
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 a
Bioretention Area. Corrective maintenance activities include:
• Removal of Debris and Sediment. Sediment, debris, and trash, which impede
the hydraulic functioning of a Swale and prevent vegetative growth, will be
removed and properly disposed.
• Structural Repairs. Once deemed necessary, repairs to structural components
of a Swale and its inlet and outlet structures will be done within 10 working
days.
• Embankment and Slope Repairs. Once deemed necessary, damage to the
embankments and slopes of Swales will be repaired within 10 working days).
• Erosion Repair. Where a reseeding program has been ineffective, or where
other factors have created erosive conditions (i.e., pedestrian traffic,
concentrated flow, etc.), corrective steps will be taken to prevent loss of soil
and any subsequent danger to the performance of a Swale. There are a number
of corrective actions than can be taken. These include erosion control blankets,
nprap.
Maintenance Category
Bioretention Areas:
The maintenance of the bioretention areas, used as IMP and HMP mitigation, will be the
responsibility of the individual private land owner. The City should have only minimal
concerns for ongoing maintenance. The proposed bioretention areas inherently "take care of
themselves", or property owners can naturally be expected to do so as an incident of taking
care of their property.
Annual Cost of Maintenance
ANNUAL COST ESTIMATE:
Bioretention Areas
TWO-YEAR COST ESTIMATE:
Bioretention Areas
33
$2,403.00
TOTAL: $2,403.00
$2,403.00
TOTAL: $2,043.00
Preliminary SWMP-September, 2014
MADISON ST
TEN-YEAR COST ESTIMATE:
Bioretention Areas $2,403.00
TOTAL: $2,403.00
34
Preliminary SWMP-September, 2014
MADISON ST
Date: ______ _
City of Carlsbad
Land Development Engineering
1635 Faraday Ave.
Carlsbad, CA 92008
Re: Final Certification of Treatment Control BMPs for Madison St.
To Whom It May Concern:
All Stormwater Treatment Control facilities have been constructed in conformance with the
approved Stormwater Management Plan, dated , in compliance with City of
Carlsbad Standards and currently accepted Engineering practices.
Brian Ardolino, RCE 71651 Date
35
Preliminary SWMP-September, 2014
~ ::-:-:;-;;.~
M -:: -: : -l,O :.
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~~~~~~~
i\:i-'li""..:J:\I.Ow'\lll.11,/;::""'-'l;,%,<r.
B1CIIIUflJINIJa lANDIIClU'flBMP
SHEET
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