HomeMy WebLinkAboutCT 02-17; FAIR OAKS VALLEY; STORM WATER MANAGEMENT PLAN; 2013-10-13Shelley Property
SECTION I
PROJECT SETTING
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TABLE 1: PROJECT DESCRIPTION
1. I Please provide a brief description of the ptoject.
This project proposes to develop the 81 acre site into 52 lots, including 48 graded pads
smtable for construction of single family residential structures and 3 open space lots. The
proposed development design improvements consist of the extension of Camino Junipero,
the construction of four public streets to provide access to each of die parcels, and die
construction of typical underground utilities associated with residential development. The
project will also include grading of die project site to provide pads suitable for die
construction of residential structures, tiie driveways, and the roads which provide access to
the individual lots.
2. I Describe the current and proposed zoning and land use designation.
The current and proposed zoning and land use designation for the project site is R-l and a
general plan designation of RLM.
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3. Describe the pre-project and post-project topography of the project.
The entire existing project site consists of roughly 81.3 acres of gendy roUing hiUs, canyon,
and minor water ways located in the Escondido Creek Watershed, more specifically in the
Escondido Creek Hydrologic Sub Area (904.61 HAS). Access to the ultimately proposed
project site will be available from Camino Junipero. The existing site has not been improved
with the exception of dirt paths, which serve as the only access to the site, and a water main
which transects the northem portion of the site.
Drainage of the proposed site wiU not disturb or alter the existing hydrology of the areas that
are tributary to the project site.
Describe the soil classification, permeability, erodibiHty, and depth to groundwater for
LID and Treatment BMP consideration. If infiltration BMPs are proposed, a
Geotechnical Engineer must certify infiltration BMPs in Attachment E.
The soil classification onsite is hydrologic soil Type "D" as determined from the County of
San Diego Hydrology Manual Soils Maps and site specific geotechnical investigation study
from the USDA Web Soil Survey. Soils have been assumed to be uncompacted in the natural
existing condition while fuUy compacted in the post developed conditions. The erodibility of
the ptoject site is 1.43 tons/ acre/ year per the RUSLE equation. There are no known
"High Risk Areas" that coidd potentially affect domestic water supply reservoirs or
groundwater percolation facilities within the project area.
5. Describe if contaminated or hazardous soils are within the project area.
There are no known hazardous or contaminated soils within the project area.
6. Describe the existing site drainage and natural hydrologic features.
The drainage basin in the existing property is approximately 101.15 acres in area, not
including the area tributary to the project site due to the storm drain improvements from
Villages of La Costa Oaks South. Villages of La Costa Oaks South contributes storm water
discharge onto the project site at two locations; one point is a storm drain pipe system in
Camino Junipero and the other is located in within the same storm drain system. The La
Costa VUlage Development hydrologic analysis indicates that a peak discharge of 21.7 cfs
with a time of concentration of 14.87 minutes and an area of 10.76 acres is associated with
these two points discharging to the project site. Drainage of the existing site basin is
conveyed via natmal channels in a primarily north to south direction. Once storm water is
conveyed to the base of the canyon, it continues in a southerly direction via existing natural
watercourse, then into Escondido Creek and xiltimately into the Pacific Ocean at the San
Elijo Lagoon.
Drainage of the proposed site wiU not disturb or alter the existing hydrology of the areas that
are tributary to the project site. The existing natural drainage paths wiU be utilized and
maintained as the primary point of discharge, and on-site improvements as necessary,
including providing brow ditches, curb inlets, cleanouts, one connection to an existing storm
drain system (currentiy discharges onto the site via an outiet headwaU) and additional storm
drain piping. Discharge firom the proposed project site will be conveyed into the existing
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natural drainage course roughly located at the mid point of the southerly project boundary.
Storm water generated on-site will either be collected in brow ditches, conveyed in a pipe, or
wiU sheet flow across the pads, be collected and conveyed in the street gutters, and
intercepted in a curb inlet.
Describe site features and conditions that constrain, or provide opportunities for storm
water control, such as LID features.
Prior to discharge, storm water runoff from the site wiU be treated by on-site BMP's. The
proposed project site has incorporated the use of site design BMP's and several structural
BMP's to address the storm water quality goals to be attained for the proposed project. In
addition source control BMP's will be presented to the Homeowner's with closing
documents to ensure that the homeowners are educated with regard to the potential for
storm water runoff firom site to become a storm water quality issue, and the potential for
contact with pollutants is minimized to the maximum extent practicable.
The proposed storm drain system incorporates the use of grass Uned swales to act as
biofilters. In addition to the swales, a large bioretention system is proposed to treat runoff
from the project site. This BMP is located downstream of the headwall serving as the outiet
to all stormwater collected within the developed project site. This BMP has the ability to
treat the required 85* percentile treatment flow and convey the 100 year discharge from the
project site (45.72 cfs).
Additionally discharge from the project site wiU not enter into an MS4 or private storm
system, but rather wiU be discharged into an existing natural channel before leaving the
property. Although not a BMP, this meandering natural channel has the inherent ability to
further increase water quality through reduction in velocity, which enables suspended solids
to drop out of the storm water flow, bio-uptake, in which plant Ufe absorbs nutrients and
other material as part of its Ufe cycle, and fiirther filtration and infiltration faciEtated by the
vegetation and earth that make up the channel. All these processes wiU further improve
storm water quality.
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
hand Development and Public Improvement Projects'?
Yes No
Is this an emergency project? If yes, please provide a description below
Yes No
TABLE 2: CHANNEL& DRAINAGE ANALYSIS
No. CRITERIA YES NO N/A COMMENTS
1. Will the project include work in channels? V If YES go to 2
If NO go to 13.
2. Will the project increase velocity or
volume of downstream flow?
IfYESgoto6.
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No. CRITERIA YES NO N/A COMMENTS
3. Will the project discharge to unLined
channels?
If YES go to. 6.
4. Will the project increase potential sediment
load of downstream flow?
If YES go to 6.
5. WiU the project encroach, cross, realign, or
cause other hydrauHc changes to a stream
that may affect downstream channel
stability?
If YES go to 8.
6. Review channel lining materials and design
for sdream bank erosion.
Continue to 7.
7. Consider channel erosion control measures
within the project Umits as well as
downstream. Consider scour velocity.
Continue to 8.
8. Include, where appropriate, energy
dissipation devices at culverts.
Continue to 9.
9. Ensure all transitions between culvert
outiets/headwaUs/wingwalls and channels
are smooth to reduce turbulence and
scour.
Continue to 10.
10. Include, if appropriate, detention facilities
to reduce peak discharges.
Continue to 11.
11. "Hardening" natural downstream areas to
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 reqviired even in the absence of
the proposed development.
Continue to 12.
12. Provide other design principles that are
comparable and equally effective.
Continue to 13.
13. End
Total Project Site Area 81.3 AC (Acres or ft^)
Estimated amount of disturbed area: _ 27.8 AC (Acres or ft^)
(If > 1 acre, you must also provide a WD ID 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: 81.3 AC (Acres or ft^)
B. Total impervious area (including roof tops) before construction 0.0 AC (Acres or
ft^)
C. Total impervious area (including roof tops) after construction 12.4 AC (Acres or ft^)
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Calculate percent impervious before construction: B/A
Calculate percent impervious after construction: C/A = 15.3
0.0 %
%
TEMPORARY CONSTRUCTION BMPS
V Silt Fence • Desilting Basin
V Fiber RoUs Gravel Bag Berm
V Street Sweeping and Vacuuming • Sandbag Barrier
V Storm Drain Inlet Protection V Material Delivery and Storage
V Stockpile Management V Spin Prevention and Control
V Solid Waste Management V Concrete Waste Management
V Stabilized Construction Entrance/Exit • Water Conservation Practices
• Dewatering Operations Paving and Grinding Operations
• Vehicle and Equipment Maintenance
• 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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SECTION II
APPLICABLE STORM WATER STANDARDS
TABLE 3: PRIORITY STATUS DETERMINATION
Yes
V
No
a A Housing subdivisions of 10 or more dwelling units. Examples: single-family homes,
multi-family homes, condominiums, and apartments.
Yes
•
No
V B
Commercial—greater than one acre. Any development other than heavy industry or
residential. Examples: hospitals; laboratories and other medical facilities; educational
institutions; recreational facilities; municipal facilities; commercial nurseries; multi-
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 C
Heavy industry—^greater than one acre. Examples: manufacturing plants, food
processiag plants, metal working facilities, printing plants, and fleet storage areas (bus,
tiruck, etc.).
Yes
a
No D Automotive repair shops. A facility categorized in any one of Standard Industrial
Classification (SIC) codes 5013, 5014, 5541, 7532-7534, or 7536-7539.
Yes
•
No E
Restaurants. Any facility that sells prepared foods and drinks for consumption,
including stationary lunch counters and refreshment stands selling prepared foods and
drinks for immediate consumption (SIC code 5812), where the land area for
development is greater than 5,000 square feet. Restaurants where land development is
less than 5,000 square feet shall meet all SUSMP requirements except for stmctural
treatment BMP and numeric sizing criteria requirements and hydromodification
requirements.
Yes
•
No
V F
Hillside development greater than 5,000 square feet. Any development that creates
5,000 square feet of impervious surface and is located in an area with known erosive
soil conditions, where the development will grade on any natural slope that is twenty-
five percent or greater.
Yes
a
No G
Environmentally Sensitive Areas (ESAs). AU development located within or directiy
adjacent to or discharging directiy to an ESA (where discharges from the development
or redevelopment will enter receiving waters within the ESA), which either creates
2,500 square feet of impervious surface on a proposed project site or increases the
area of imperviousness of a proposed project site to 10% or more of its naturally
occurring condition. 'T)irecdy adjacent" means situated within 200 feet of the ESA.
"Discharging directiy to" means outflow from a drainage conveyance system that is
composed entirely of flows firom the subject development or redevelopment site, and
not commingled with flows from adjacent lands.
Yes
a
No
V H Parking lots 5,000 square feet or more or with 15 or more parking spaces and
potentially exposed to urban mnoff
Yes No
• I
Street, roads, highways, and freeways. Any paved surface that is 5,000 square feet or
greater used for the transportation of automobiles, tmcks, motorcycles, and other
vehicles.
Yes
•
No J Retail Gasoline Outiets (RGOs) tiiat are: (a) 5,000 square feet or more or (b) a
projected Average Daily Traffic (ADT) of 100 or more vehicles per day.
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TABLE 4: EXCEPTIONAL THREAT TO WATER QUALITY DETERMINATION
No. CRITERIA YES NO INFORMATION
1. Is aU or part of the proposed project site within 200 feet
of waters named on the Clean Water Act (CWA) Section
303(d) list of Water QuaHty Limited Segments as impaired
for sedimentation and/or turbidity?
V If YES, continue to
2.
IfNO, goto5.
2. WiU the project disturb more than 5 acres, including all
phases of the development?
If YES, continue to
3.
IfNO, go to 5.
3. Will the project disturb slopes that are steeper than 4:1
(horizontal: vertical) with at least 10 feet of relief, and that
drain toward the 303(d) Hsted receiving water for
sedimentation and/or turbidity?
If YES, continue to
4.
IfNO, go to 5.
4. WiU the project disturb soUs with a predominance of
USDA-NRCS Erosion factors kf greater than or equal to
0.4?
If YES, continue to
6.
IfNO, go to 5.
5. Project is not required to use Advanced Treatment BMPs. V Document for
Project Files by
referencing this
checkUst.
6. Project poses an "exceptional threat to water quaUty" and
is required to use Advanced Treatment BMPs.
V Advanced
Treatment BMPs
must be consistent
with WPO section
67.81 l(b)(20)(D)
performance criteria
TABLE 5: HYDROMODIFICATION DETERMINATION
QUESTIONS YES NO Information
1. WiU the project reduce the pre-project
impervious area and are the unmitigated
post-project outflows (outflows without
detention routing) to each outiet location
less as compared to the pre-project
condition?
V If NO, continue to 2.
If YES, go to 7.
2. Would the project site discharge runoff
directiy to an exempt receiving water, such
as the Pacific Ocean, San Diego Bay, an
exempt reservoir, or a tidaUy-influenced
area?
V IfNO, continue to 3.
IfYES,goto7.
3. Would the project site discharge to a
stabiUzed conveyance system, which has the
capacity for the ultimate Qio, and extends to
the Pacific Ocean, San Diego Bay, a tidaUy-
V If NO, continue to 4.
IfYES, goto7.
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influenced area, an exempt river reach or
reservoir?
4. Does the contributing watershed area to
which the project discharges have an
impervious area percentage greater than 70
percent?
V If NO, continue to 5.
IfYES, go to 7.
5. Is this an urban infiU project which
discharges to an existing hardened or
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" susceptibiUty
to erosion as defined in the SCCWRP
channel assessment tool?
V IfNO, continue to 6.
IfYES, go to 7.
6. Project is required to manage
hydromodification impacts.
V Reference
"Hydromodification
AppUcabiUty
Determination" of the
City of Carlsbad
SUSMP.
7. Project is not required to manage
hydromodification impacts.
V
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SECTION III
IDENTIFY POLLUTANTS OF CONCERN
WATERSHED
• San Juan 901 • Santa Margarita 902 • San Luis Rey 903 V 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.watefboards.ca.gov/sandiego/water issues/programs/basin plan/index.shtml
HYDROLOGIC SUB-AREA NAME AND BASIN NUMBER(S)
Basin Number Sub-Area Name
904.61 Escondido Creek Hydrologic Sub-Area
http: / /www.waterboarc s.ca.gov/sandiego/water issues/programs/basin plan/index.shtml
SURFACE WATERS that each project d ischarge point proposes to discharge to.
SURFACE WATERS
(river, creek, stream, etc.)
Hydrologic
Unit Basin
Number
Impairment(s) listed [303(d) listed
waters or waters with established
TMDLs]. List the impairments
identified in Table 7.
Distance to
Project
Escondido Creek 904.61 Indicator Bacteria 1.6 Miles
http://www.waterboards.ca.gov/water issues/programs/tmdl/docs/303dlists2006/epa/t9 06 303d leqtmdl
s.pdf
GROUND WATERS
Ground Waters
Hydrologic
Unit Basin
Number MUN AGR IND PROC GWR FRESH POW RECl REC2 BIOL WARM COLD WILD RARE SPWN Escondido Creek 904.61 • • o
http://www.waterboards.ca.gov/sandiego/water issues/programs/basin plan/index.shtml
+ Excepted from Municipal • Existing Beneficial Use o Potential Beneficial Use
10
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PROJECT ANTICIPATED AND POTENTIAL POLLUTANTS
Using Table 6, identify poUutants that are anticipated to be generated from the proposed
priority project categories. PoUutants associated with any hazardous material sites that have
been remediated or are not threatened by the proposed project are not considered a
poUutant of concern.
TABLE 6: ANTICIPATED AND POTENTIAL POLLUTANTS GENERATED BY
LAND USE TYPE
General Pollutant Categories
PDF
Categories Sediments Nutrients Heavy
Metals
Organic
Compounds
Trash &
Debris
Oxygen
Demanding
Substances
Oil&
Grease
Bacteria
&
Viruses
Pesticides
',Detachld-; Xrf>£--
'*' f = • 'iii?.^ •
-*^^|:;.;.. • X
Attached
Residential
Development
X X X p(i) p(2) p X
Commercial
Development 1
acre or greater
p(i) p{i) p(2) X p(5) X p(3) p(5)
Heavy industry
/industrial
development
X X X X X X
Automotive Repair
Shops X X X
Restaurants X X X X
HiUside
Development
>5,000 ft2
X X X X X X
Parking Lots p(l) pO) X X pO) X pp)
Retail Gasoline
Oudets
X X X X X
Srieets, IJig^ijWfly^
& Freeways • ' X. p X
'*•.
X.
X = anticipated
P = potential
(1) A potential poUutant if landscaping exists on-site.
(2) A potential poUutant if the project includes uncovered parking areas.
(3) A potential poUutant if land use involves food or animal waste products.
(4) Including petroleum hydrocarbons.
(5) Including solvents.
11
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PROJECT POLLUTANTS OF CONCERN SUMMARY TABLE
TABLE 7: PROJECT POLLUTANTS OF CONCERN
Pollutant Category Anticipated
(X)
Potential
(P)
Surface Water Impairments
Sediments X
Nutrients X
Heavy Metals X
Organic Compounds X
Trash & Debris X
Oxygen Demanding
Substances X
Oil & Grease X
Bacteria & Vimses X Bacteria
Pesticides X
12
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Shelley Property
SECTION IV
SOURCE CONTROL MEASURES
TABLE 8: PROJECT SOURCE CONTROL BMPS
Potential source of
runoffpollutants
Permanent
source control BMPs
Operational
source control BMPs
Landscape/ Outdoor
Pesticide Use Preserve existing native
trees, shrubs, and ground
covet to the maximum extent
possible.
Design landscaping to
minimize irrigation and
runoff, to promote surface
infiltration where
appropriate, and to minimize
the use of fertilizers and
pesticides that can
contribute to stormwater
pollution.
Maintain landscaping using
minimum or no pesticides
Provide IPM information to
new owners, lessees and
operators.
Refuse areas State how site refuse will be
handled and provide
supporting detaU to what is
shown on plans.
If dumpsters or other
receptacles ate outdoors,
show how the designated
area will be coveted, gtaded,
and paved to ptevent tun-on
and show locations of betms
to ptevent tunoff from the
Pfovide adequate number of
teceptacles. Inspect
receptacles regularly; tepait ot
replace leaky receptacles.
Keep teceptacles coveted.
Prohibit/ptevent dumping of
liquid ot hazardous wastes.
Post "no hazardous
materials" signs. Inspect and
pick up Uttet daily and clean
up spills immediately. Keep
spill conttol matetials
available on-site. See Fact
Sheet SC-34, "Waste
Handling and Disposal" in
the CASQA Stotmwatet
Quality Handbooks at
www.cabmphandbooks.com
Roofing, gutters, and
ttim.
Avoid toofing, guttets, and
trim made of coppet or othet
unprotected metals that may
leach into tunoff
Plazas, sidewalks, and
patking lots
Plazas, sidewalks, and
patking lots shall be swept
tegularly to ptevent the
accumulation of Uttet and
debtis. Debris from pressure
washing shall be collected to
ptevent entty into the stotm
dtain system. Washwatet
containing any cleaning agent
ot degteaset shall be collected
and dischatged to the sanitaty
sewet and not dischatged to a
13
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Shelley Property
stotm dtain.
Fite Sptinklet Test
Watet
Provide means to drain fire
sprinkler test water to the
sanitary sewet.
See the note in Fact Sheet SC-
41, "Building and Gtounds
Maintenance," in the CASQA
Stotmwatet Quality
Handbooks at
www.cabmphandbooks.com
See Table 8 for proposed source control BMP's appUcable to this project.
14
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Shelley Property
IF THESE SOURCES WILL BE
ON THE PROJECT SITE ... . THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff PoUutants - List in Table 9
Permanent Controls—Show on Source Control
Exhibit, Attachment B
Permanent Controls—^List in Table 9 and Narrative Operational BMPs—Include in
Table 9 and Narrative
V A. On-site storm dtain
inlets
V Locations of inlets. Matk all inlets with the wotds "No
Dumping! Flows to Bay" or similar
where feasible.
V Maintain and petiodically tepaint ot
teplace inlet markings.
•sj Ptovide stotmwatet pollution
ptevention infotmation to new site
ownets, lessees, ot opetatots.
See applicable opetational BMPs in
Fact Sheet SC-44, "Drainage System
Maintenance," in the CASQA
Stotmwatet Quality Handbooks at
www.cabmphandbooks.com
Q Include the following in lease
agreements: "Tenant shall not allow
anyone to dischatge anything to
stotm dtains ot to stote ot deposit
matetials so as to cteate a potential
dischatge to storm drains."
B. Intetiot floot dtains
and elevatot shaft sump
pvunps
• State that intetiot floot drains and
elevator shaft sump pumps will be
plumbed to sanitaty sewet.
• Inspect and maintain dtains to
ptevent blockages and ovetflow.
V C. Intetiot patking
gatages
V State that patking gatage floot dtains
will be plumbed to the sanitaty sewet.
Inspect and maintain dtains to
ptevent blockages and ovetflow.
V Dl. Need fot futute
indoor & structural pest
conttol
Note buUding design feamtes that
discoutage entty of pests.
Ptovide Integrated Pest Management
infotmation to ownets, lessees, and
operators.
15
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Shelley Property
IF THESE SOURCES WILL BE
ON THE PROJECT SITE ... ... THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff PoUutants - List in Table 9
Permanent Controls—Show on Source Control
Exhibit, Attachment B
Permanent Controls—^List in Table 9 and Narrative Operational BMPs—Include in
Table 9 and Narrative
D2. Landscape/
Outdoot Pesticide Use
Note: Should be
consistent with ptoject
landscape plan (if
appUcable).
Show locations of native ttees or
areas of shmbs and gtotmd covet to
be undistutbed and tetained.
• Show self-retaining landscape
ateas, if any.
V Show stotmwatet tteatment
faciUties.
State that flnal landscape plans will
accompUsh aU of the following:
V Ptesetve existing native ttees, shtubs,
and gtound covet to the maximum
extent possible.
•yj Design landscaping to minimize
ittigation and tunofl', to promote
surface infllttation whete apptoptiate,
and to minimize the use of fettiUzets
and pesticides that can conttibute to
stotmwatet pollution.
• Whete landscaped ateas ate used to
tetain or detain stotmwatet, specify
plants that ate toletant of satutated
soil conditions.
• Considet using pest-tesistant plants,
especially adjacent to hardscape.
• To insute successful estabUshment,
select plants appropriate to site soils,
slopes, climate, sun, wind, rain, land
use, air movement, ecological
consistency, and plant interactions.
V Maintain landscaping using
minimum or no pesticides.
• See appUcable opetational BMPs in
Fact Sheet SC-41, "Building and
Gtoimds Maintenance," in the
CASQA Stormwater QuaUty
Handbooks at
www.cabmphandbooks.com
Ptovide IPM information to new
ownets, lessees and opetatots.
• E. Pools, spas, ponds,
decotative fountains,
and other watet
featutes.
Show location of water feature and
a sanitary sewer cleanout in an
accessible area within 10 feet.
If the local municipaUty requires pools
to be plumbed to the sanitary sewet,
place a note on the plans and state in
the narrative that this connection wUl
be made according to local
tequitements.
See appUcable opetational BMPs in
Fact Sheet SC-72, "Fountain and
Pool Maintenance," in the CASQA
Stotmwatet QuaUty Handbooks at
www.cabmphandbooks.com
16
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Shelley Property
IF THESE SOURCES WILL BE
ON THE PROJECT SITE ... . THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff PoUutants - List in Table 9
Permanent Controls—Show on Source Control
Exhibit, Attachment B
Permanent Controls—^List in Table 9 and Narrative Operational BMPs—Include in
Table 9 and Narrative
• F. Food seivice
•
Fot testaurants, grocery stores, and
other food service operations, show
location (indoors or in a coveted
atea outdoots) of a floot sink ot
othet area for cleaning floot mats,
containets, and equipment.
On the dtawing, show a note that
this dtain will be connected to a
gtease intetceptot before
discharging to the sanitary sewet.
• Desctibe the location and feamtes of
the designated cleaning atea.
• Desctibe the items to be cleaned in
this faciUty and how it has been sized
to insute that the latgest items can be
accommodated.
G. Refuse ateas
•
Show whete site tefuse and
lecycled matetials will be handled
and stored fot pickup. See local
municipal requirements fot sizes
and othet details of tefuse ateas.
If dumpstets ot othet teceptacles
ate outdoots, show how the
designated atea wUI be coveted,
gtaded, and paved to ptevent run-
on and show locations of betms to
ptevent mnoff from the atea.
Any dtains ftom dumpstets,
compactors, and tallow bin ateas
shaU be coimected to a gtease
temoval device befote dischatge to
sanitaty sewer.
State how site tefuse will be handled
and ptovide supporting detail to what
is shown on plans.
State that signs will be posted on or
neat dtunpstets with the wotds "Do
not dump hazatdous matetials hete"
ot similat.
V State how the foUowing will be
implemented:
Ptovide adequate numbet of
teceptacles. Inspect teceptacles
tegulatly; tepait ot teplace leaky
teceptacles. Keep teceptacles
coveted. Ptohibit/ptevent dumping
of Uquid ot hazatdous wastes. Post
"no hazatdous matetials" signs.
Inspect and pick up Uttet daily and
clean up spills immediately. Keep
spiU conttol matetials available on-
site. See Fact Sheet SC-34, "Waste
Handling and Disposal" in the
CASQA Stotmwatet QuaUty
Handbooks at
www.cabmphandbooks.com
17
SWMP-October 2012
Shelley Property
IF THESE SOURCES WILL BE
ON THE PROJECT SITE ...
1
Potential Sources of
Runoff PoUutants - List in Table 9
THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
Permanent Controls—Show on Source Control
Exhibit, Attachment B
Permanent Controls—^List in Table 9 and Narrative Operational BMPs—Include in
Table 9 and Narrative
• H. Industtial ptocesses. • Show ptocess atea. If industtial ptocesses ate to be
located on site, state: "AU ptocess
activities to be performed indoors. No
processes to drain to exterior ot to
stotm dtain system."
I. Outdoot storage of
equipment ot matetials.
(See tows J and K fot
source conttol
measures for vehicle
cleaning, tepait, and
maintenance.)
• Show any outdoot stotage ateas,
including how matetials will be
coveted. Show how ateas wiU be
gtaded and betmed to ptevent mn-
on ot mn-off ftom atea.
• Stotage of non-hazatdous Uquids
shaU be coveted by a toof and/ot
dtain to the sanitaty sewer system,
and be contained by betms, dikes,
Unets, ot vaults.
• Storage of hazatdous matetials and
wastes must be in compUance with
the local hazatdous matetials
otdrnance and a Hazatdous
Matetials Management Plan for the
site.
• Include a detailed description of
materials to be stored, stotage ateas,
and stmctutal feamtes to ptevent
poUutants ftom enteting storm drains.
Whete apptoptiate, lefetence
documentation of compUance with the
requirements of local Hazardous
Materials Ptogtams fot:
• Hazatdous Waste Genetation
• Hazatdous Matetials Release
Response and Inventoty
• CaUfotnia Accidental Release
(CalARP)
" Abovegtound Stotage Tank
• Unifotm Fire Code Article 80
Section 103(b) & (c) 1991
• Undetgtoimd Stotage Tank
See Fact Sheet SC-10, "Non-
Stormwater Discharges" in the
CASQA Stotmwatet QuaUty
Handbooks at
www.cabmphandbooks.com
See the Fact Sheets SC-31, "Outdoot
Liquid Containei Stotage" and SC-
33, "Outdoot Stotage of Raw
Matetials " in the CASQA
Stotmwatet QuaUty Handbooks at
www.cabmphandbooks.com
18
SWMP-October 2012
Shelley Property
IF THESE SOURCES WILL BE
ON THE PROJECT SITE ...
1
Potential Sources of
Runoff PoUutants - List in Table 9
THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
Permanent Controls—Show on Source Control
Exhibit, Attachment B
Permanent Controls—List in Table 9 and Narrative Operational BMPs—Include in
Table 9 and Narrative
• J. Vehicle and
Equipment Cleaning
Show on dtawings as apptoptiate:
(1) Commercial/industtial faciUties
having vehicle / equipment
cleaning needs shaU eithet ptovide
a covered, betmed area for washing
activities or discotuage
vehicle/equipment washing by
removing hose bibs and installing
signs prohibiting such uses.
(2) Midti-dwelUng complexes shaU
have a paved, betmed, and coveted
cat wash atea (unless cat washing
is ptohibited on-site and hoses ate
ptovided with an automatic shut-
off to discoutage such use).
(3) Washing ateas fot cats, vehicles,
and eqixipment shaU be paved,
designed to ptevent tun-on to ot
mnoff' ftom the atea, and plumbed
to drain to the sanitaty sewet.
(4) Commercial cat wash faciUties
shaU be designed such that no
mnoff ftom the faciUty is
dischatged to the stotm dtain
system. Wastewatet ftom the
faciUty shaU dischatge to the
sanitary sewer, or a wastewater
reclamation system shaU be
instaUed.
• If a cat wash atea is not ptovided,
desctibe measures taken to discoutage
on-site cat washing and explain how
these wiU be etifotced.
Desctibe opetational measutes to
implement the foUowing (if
appUcable):
• Washwatet ftom vehicle and
equipment washing opetations shaU
not be dischatged to the stotm dtain
system.
• Cat dealetships and simUar may
rinse cats with watet only.
• See Fact Sheet SC-21, "Vehicle and
Equipment Cleaning," in the CASQA
Stotmwatet QuaUty Handbooks at
vyww.cabmphandbooks.com
19
SWMP-October 2012
Shelley Property
IF THESE SOURCES WILL BE
ON THE PROJECT SITE ...
1
Potential Sources of
Runoff Pollutants - List in Table 9
THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
Permanent Controls—Show on Source Control
Exhibit, Attachment B
Permanent Controls—^List in Table 9 and Narrative Operational BMPs—Include in
Table 9 and Narrative
• K. Vehicle/Equipment
Repaif and
Maintenance
• Accommodate aU vehicle
equipment repair and maintenance
indoors. Ot designate an outdoot
wotk atea and design the atea to
ptevent run-on and tunoff of
stotmwatet.
• Show secondary containment fot
extetiof wotk ateas whete motot
oil, brake fluid, gasoline, diesel
fuel, tadiatot fluid, acid-containing
batteries ot othet hazatdous
matetials ot hazatdous wastes ate
used ot stoted. Drains shaU not be
instaUed within the secondary
contaiiunent ateas.
• Add a note on the plans that states
eithet (1) thete ate no floot dtains,
ot (2) floot dtains ate connected to
wastewatet ptetteatment systems
ptiot to dischatge to the sanitaty
sewet and an industtial waste
dischatge permit wfll be obtained.
Ql State that no vehicle repair ot
maintenance wiU be done outdoots, ot
else desctibe the tequited featutes of
the outdoot wotk area.
• State that there are no floor drains or if
thete ate floot dtains, note the agency
ftom which an industtial waste
dischatge petmit wiU be obtained and
that the design meets that agency's
tequitements.
• State that there are no tanks,
containets ot sinks to be used fot patts
cleaning ot tinsing ot, if there are, note
the agency from which an industrial
waste discharge petmit wiU be
obtained and that the design meets
that agency's tequitements.
In the SUSMP tepott, note that aU of
the foUowing testtictions apply to use
the site:
• No petson shaU dispose of, not
petmit the disposal, directly or
indirectly of vehicle fluids, hazardous
materials, or rinsewater from parts
cleaning into stotm dtains.
No vehicle fluid temoval shaU be
Q performed outside a building, not on
asphalt ot gtound sutfaces, whethet
inside ot outside a building, except
in such a mannet as to ensute that
any spiUed fluid wiU be in an atea of
secondaty contaitmient. Leaking
vehicle fluids shaU be contained ot
dtained ftom the vehicle
immediately.
No person shaU leave unattended
Q drip parts or other open containets
containing vehicle fluid, unless such
containets ate in use ot in an atea of
secondaty containment.
20
SWMP-October 2012
Shelley Property
IF THESE SOURCES WILL BE
ON THE PROJECT SITE ...
1
Potential Sources of
Runoff PoUutants - List in Table 9
THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
Permanent Controls—Show on Source Control
Exhibit, Attachment B
Permanent Controls—^List in Table 9 and Narrative Operational BMPs—Include in
Table 9 and Narrative
• L. Fuel Dispensing
Areas
FueUng ateas' shaU have
impetmeable floots (i.e., portiand
cement concrete or equivalent
smooth impervious surface) that
ate: a) gtaded at the minimum
slope necessaty to ptevent ponding;
and b) separated ftom the rest of
the site by a grade break that
prevents tun-on of stormwater to
the maxunimi extent practicable.
FueUng ateas shaU be coveted by a
canopy that extends a minimum of
ten feet in each ditection ftom each
pump. [Alternative: The fueUng
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 [ot
covet] shaU not dtain onto the
fueUng atea.
• The property owner shaU dty sweep
the fueling atea toutinely.
• See the Business Guide Sheet,
"Automotive Setvice—Setvice
Stations" in the CASQA Stotmwatet
QuaUty Handbooks at
vyww.cabmphandbooks.com
^ 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 minimum of one foot, whichever is greater.
21
SWMP-October 2012
Shelley Property
IF THESE SOURCES WILL BE
ON THE PROJECT SITE ... THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff PoUutants - List in Table 9
Permanent Controls—Show on Source Control
Exhibit, Attachment B
Permanent Controls—^List in Table 9 and Narrative Operational BMPs—Include in
Table 9 and Narrative
• M. Loading Docks
•
Show a pteUminary design for the
loading dock area, including
roofing and drainage. Loading
docks shaU be coveted and/ot
gtaded to minimize tim-on to and
tunoff ftom the loading atea. Roof
downspouts shaU be positioned to
ditect stotmwatet away from the
loading area. Water from loading
dock areas should be drained to the
sanitary sewet whete feasible.
Ditect connections to stotm dtains
ftom deptessed loading docks ate
ptohibited.
Loading dock ateas draining
directiy to the sanitaty sewer shaU
be equipped with a spiU conttol
valve ot equivalent device, which
shaU be kept closed duting periods
of operation.
Provide a toof ovethang ovet the
loading atea ot instaU doot skitts
(cowUng) at each bay that enclose
the end of the trailer.
Move loaded and unloaded items
indoors as soon as possible.
See Fact Sheet SC-30, "Outdoor
Loading and Unloading," in the
CASQA Stormwater QuaUty
Handbooks at
www.cabmphandbooks.com
N. Fire Sprinkler Test
Water
Provide a means to drain fire sprinkler
test water to the sanitary sewer.
See the note in Fact Sheet SC-41,
"Buildiag and Groimds
Maintenance," in the CASQA
Stotmwatet QuaUty Handbooks at
www.cabmphandbooks.com
22
SWMP-October 2012
Shelley Property
IF THESE SOURCES WILL BE
ON THE PROJECT SITE ... . THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs
1
Potential Sources of
Runoff PoUutants - List in Table 9
Permanent Controls—Show on Source Control
Exhibit, Attachment B
Permanent Controls—^List in Table 9 and Narrative Operational BMPs—Include in
Table 9 and Narrative
O. MisceUaneous Dtain
ot Wash Watet
• BoUet dtain lines
• Condensate dtain Unes
• Rooftop equipment
G Drainage sumps
V Roofing, gutters, and
trim.
• Boiler drain lines shaU be directly or
inditectiy connected to the sanitary
sewer system and may not discharge
to the storm drain system.
• Condensate drain lines may discharge
to landscaped areas if the flow is smaU
enough that runoff wUl not occur.
Condensate drain Unes may not
discharge to the storm drain system.
Rooftop moimted equipment with
Q potential to produce poUutants shaU
be roofed and/ot have secondaty
contaitunent.
Any dtainage sumps on-site shaU
Q feature a sediment sump to teduce the
quantity of sediment in pumped watet.
Avoid roofing, gutters, and trim made
^ of copper or other improtected metals
that may leach into runoff.
P. Plazas, sidewalks,
and parking lots.
V Plazas, sidewalks, and parking lots
shaU be swept regularly to ptevent
the accumulation of Uttet and debtis.
Debtis ftom ptessure washing shaU
be coUected to prevent entty into the
stotm dtain system. Washwatet
containing any cleaning agent ot
degteaset shaU be coUected and
dischatged to the sanitaty sewer and
not dischatged to a stotm dtain.
23
SWMP-October 2012
Shelley Property
SECTION V
LOW IMPACT DEVELOPMENT (LID) DESIGN STRATEGIES
TABLE 9: LID AND SITE DESIGN
1. Conserve natural Areas, Soils, and Vegetation
• Preserve well draining soils (Type A or B)
V Preserve Significant Trees
V Preserve critical (or problematic) areas such as floodplains, steep slopes, wetiands,
and areas with erosive or unstable soil conditions
• Other. Descnption:
2. Minimize Disturbance to Natural Drainages
V Set-back development envelope from drainages
V Restrict heavy construction equipment access to planned green/open
space areas
• Other. Description:
3. Minimize and Disconnect Impervious Surfaces (see 5)
V Clustered Lot Design
V Items checked in 5
• Other. Description:
4. Minimize Soil Compaction
V Restrict heavy construction equipment access to planned green/open
space areas
V Re-tiU soils compacted by construction vehicles/eqviipment
V 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 Design
V Curb-cuts to landscaping
V Rural Swales
• Concave Median
• Ctil-de-sac Landscaping Design
• Other. Description:
24
SWMP-October 2012
Shelley Property
LID Parking Lot Design
• • Permeable Pavements
•
• Curb-cuts to landscaping
• Other. Description:
1 LID Drivewav. Sidewalk. Bike-path Design
• Permeable Pavements
1 V Pitch pavements toward landscaping
• Other. Description:
•
LID Building Design
1 • Cisterns & Rain Barrels
V Downspout to swale or landscaping
1 • Vegetated Roofs
• Other. Description:
I LID Landscaping Design • V Soil Amendments
I V Reuse of Native Soils
1 V Smart Irrigation Systems
V Street Trees
1 • Other. Description:
6. Minimize erosion from slopes
V Disturb existing slopes only when necessary
V Minimize cut and fill areas to reduce slope lengths
V Incorporate retaining walls to reduce steepness of slopes or to shorten slopes • • Provide benches or terraces on high cut and fiU slopes to reduce concentration
of flows
1 V Rounding and shaping slopes to reduce concentrated flow
V Collect concentrated flows in stabilized drains and channels
1 • Other. Description:
25
I SWMP - October 2012
Shelley Property
SECTION VI
INTEGRATED MANAGEMENT PRACTICES
TABLE 10: GROUPING OF POTENTIAL POLLUTANTS OF CONCERN (POCS) BY
FATE DURING STORMWATER TREATMENT
Pollutant Check
Project
Specific
POCs
Coarse Sediment and Trash PoUutants that tend
to associate with
fine particles during
treatment
Pollutants that tend
to be dissolved
following treatment
Sediment X X X
Nutrients X X X
Heavy Metals X X
Organic Compounds X X
Trash & Debris X X
Oxygen Demanding X X
Bacteria X X
Oil & Grease X X
Pesticides X X
TABLE 11: GROUPS OF POLLUTANTS AND RELATIVE EFFECTIVENESS OF
TREATMENT FACILITIES
Pollutants of
Concern
Bioietuntitm
•F•^aliucs,^
'•'.(T-ID)"
Settling
Basins
(Dry
Ponds)
Wet Ponds
and
Constructed
Wedands
Infiltration
Devices
(LID)
Media
Filters
Higher-
rate
biofilters
Higher-
rate
media
filters
Trash Racks
& Hydro
-dynamic
Devices
Vegetated
Swales
Coarse
Sediment
and Trash
-.-High • High High High High High High High High
Pollutants
that tend to
associate
with fine
particles
during
treatment
High High High High Medium Medium Low Medium
Pollutants
that tend to
be dissolved
following
treatment
Mcdmm-Low Medium High Low Low Low Low Low
26
SWMP-October 2012
Shelley Property
TABLE 12: PROJECT LID AND TC-BMPS
LID and TC-BMP Type Water QuaUty
Tteatment Only
Hydtomodification
Flow Conttol
Bioretention Facilites (LID)
V Bioretention area 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)
• Infiltration basin
• Infiltration trench
• Odier
Wet Ponds and Constructed Wetlands
• Wet pond/basin (permanent pool)
• Constructed wetiand
Veaetated Swales (LID<^^)
• Vegetated Swale
Media Filters
• Austin Sand Filter
• Delaware Sand Filter
• Multi-Chambered Treatment Train (MCTT)
Highet-rate Biofilters
• Tree-pit-style unit
n Other
Hiffher-tate Media Filters
• Vault-based filtration unit with replaceable
cartridges
n Other
Hydfodynamic Separator Systems
• Swirl Concentrator
• Cyclone Separator
Trash Racks
• Catch Basin Insert
• Catch Basin Insert w/ Hydrocarbon boom
n Other
27
SWMP-October 2012
Shelley Property
Bioretention areas were chosen for their removal efficiencies, construction ease, low cost to
maintain and constmct and their ability to ftinction 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.
28
SWMP-October 2012
Shelley Property
SECTION VII
TREATMENT CONTROL BMP'S
NOT APPLICABLE WITH IMP SIZING APPROACH.
29
SWMP-October 2012
Shelley Property
SECTION VIII
HYDROMODIFICATION
NOT APPLICABLE WITH IMP SIZING APPROACH.
30
SWMP-October 2012
Shelley Property
SECTION IX
DOCUMENTATION OF STORM WATER DESIGN FOR IMP APPROACH
REFER TO TECHNICAL MEMORANDUM: SWMM MODELING
FOR HYDROMODIFICATION COMPLIANCE OF: FAIR OAKS
VALLEY, Prepared by Tory R. Walker Engineering, Inc., Dated
September 12, 2012
31
SWMP-October 2012
Shelley Property
SECTION X
BMP FACILITY MAINTENANCE REQUIREMENTS
> Responsible Party for Long-term Maintenance:
Representative Name: Chuck Duvivier
Company Name: Fair Oaks Valley, LLC
Phone Number:
Street Address: P.O. Box 230638
City/State/Zip: Encinitas, CA 92024
Email Address:
^ Funding Source:
Fair Oaks Valley, LLC
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 reqiaired 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 shoidd 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
facihty's hfe 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.
In order to maintain the treatment area's appearance it may be necessary to prune and weed.
32
SWMP-October 2012
Shelley Property
Furthermore, mulch replacement is suggested when erosion is evident or when the site
begins to look unattractive. Specifically, the entire area may reqtiire 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) wiH 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 wiU be significantiy 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
Pteventive 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 wiU be conducted to reduce the potential for inlet and
outiet 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.
• Elimination of Mosquito Breeding Habitats. The most effective mosquito
control program is one that eliminates potential breeding habitats.
33
SWMP-October 2012
Shelley Property
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 Bioretention Area and prevent vegetative
growth, win be removed and properly disposed.
• Structural Repairs. Once deemed necessary, repairs to structural components
of a Bioretention Area and its inlet and outiet structures will be done within 10
working days.
• Embankment and Slope Repairs. Once deemed necessary, damage to die
embankments and slopes of Swales wiU be repaired witiiin 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 wiU be taken to prevent loss of soil
and any subsequent danger to the performance of a Bioretention Area. There
are a number of corrective actions than can be taken. These include erosion
control blankets, riprap.
Maintenance Category
Bioretention Areas:
The maintenance of the bioretention areas, used as IMP mitigation, will be tiie responsibility
of the individual private land owner. The City should have only minimal concerns for
ongoing maintenance. The proposed bioretention areas inherentiy "take care of tiiemselves",
or property owners can naturally be expected to do so as an incident of taking care of tiieir
property.
Annual Cost of Maintenance
ANNUAL COST ESTIMATE:
Bioretention Areas $306,429.00
TOTAL: $306,429.00
TWO-YEAR COST ESTIMATE:
Bioretention Areas $612,860.00
TOTAL: $612,860.00
TEN-YEAR COST ESTIMATE:
Bioretention Areas $3,064,299.00
TOTAL: $3,064,299.00
34
SWMP-October 2012
Shelley Property
Date:
City of Carlsbad
Land Development Engineering
1635 Faraday Ave.
Carisbad, CA 92008
Re: Final Certification of Treatment Control BMPs for Fair Oaks VaUey
To Whom It May Concern:
All Stormwater Treatment Control facihties have been constructed in conformance with the
approved Stormwater Management Plan, dated , in compUance with City of
Carlsbad Standards and currentiy accepted Engineering practices.
Brian ArdoUno, RCE 71651 Date
35
SWMP-October 2012