HomeMy WebLinkAboutC.505 Stormwater Pollution Prevention PlanThe area scheduled for construction is known as "Health and Wellness Suites of Carmel" (hereinafter referred to as
the "Project ").
PROJECT LOCATION:
The property is located northeast of the intersection of Pennsylvania Street and City Center Drive in Carmel, Indiana,
at a latitude of 39' 58' 1.24" N and a longitude of 86' 09' 14.06" W
OWNER'S INFORMATION:
Name: Mainstreet Property Group, LLC
Address: 14390 Clay Terrace Boulevard, Carmel, IN 46032
Representative: Laurie Schultz
Title: Director of Development
Telephone: 317.420.0205
Facsimile: 317.420.0206
OPERATOR'S INFORMATION:
Name: Mainstreet Property Group, LLC
Address: 14390 Clay Terrace Boulevard, Carmel, IN 46032
Representative: Laurie Schultz
Title: Director of Development
Telephone: 317.420.0205
Facsimile: 317.420.0206
NOTICE OF INTENT:
All parties defined as owners or operators must submit a Notice of Intent (NOI) at least 48 hours prior to
commencement of on -site construction activities. Submittal of late NOI's is not prohibited; however, authorization
under the construction general permit is only for discharges that occur after permit coverage is granted. Unpermitted
discharges may be subject to enforcement actions by the EPA. For the purposes of this permit, an operator is
defined as any party meeting either of the following requirements:
a. The party has operational control over construction plans and specifications, including the ability to make
modifications to those plans and specifications.
b. The party has day-to -day operational control of those activities at a project that are necessary to ensure
compliance with a storm water pollution prevention plan for the site or other permit conditions.
A2 11" x 17" PLAT:
Refer to Site Plan
A3 PROJECT NARRATIVE:
This project consists of the development of a proposed skilled care and assisted living facility on approximately 7.85
acres in Carmel, Indiana. The development includes the construction of a 45,788 -sft building including infrastructure,
not limited to the following activities: removal and stockpiling of topsoil and installation of sanitary sewers and
laterals, water laterals, storm sewers, and other utilities. The site shall be paved and landscaped.
The drainage plans for the site include a storm sewer designed for conveyance of 10 -year flood that discharges to
the proposed wet detention pond on the eastern portion of the site.
A4 VICINITY MAP:
Refer to Title Sheet.
A5 LEGAL DESCRIPTION OF PROJECT SITE;
A part of the West Half of the Northeast Quarter of Section 35, Township 18 North, Range 3 East, being more particularly
described as follows: Commencing at the southwest comer of said Northeast Quarter Section; thence North 00 degrees 07
minutes 31 seconds West (basis of bearing- record description) along the West line of said Quarter a distance of 1,048.26
feet; thence North 89 degrees 52 minutes 29 seconds East perpendicular to said West line a distance of 29.00 feet to the
easterly right -of -way line of Pennsylvania Street per a Warranty Deed to the City of Carmel, recorded as Instrument No.
200300029019 in the Office of the Recorder of Hamilton County, Indiana and the Point of Beginning; thence continuing North
89 degrees 52 minutes 29 seconds East a distance of 59.55 feet to a point on a curve to the right having a radius of 236.62
feet, the radius point of which bears South 00 degrees 07 minutes 32 seconds East; thence easterly along said curve an arc
distance of 77.24 feet to a point which bears North 18 degrees 34 minutes 36 seconds East from said radius point, said end
of curve being a point of curvature of a curve to the left having a radius of 328.19 feet, the radius point of which bears North
18 degrees 34 minutes 38 seconds East; thence easterly along said curve an arc distance of 109.83 feet to a point which
bears South 00 degrees 35 minutes 50 seconds East from said radius point; thence South 00 degrees 07 minutes 31
seconds East a distance of 46.00 feet to a point on a non - tangent curve to the left having a radius of 374.20 feet, the
radius point of which bears North 00 degrees 32 minutes 21 seconds West; thence easterly along said curve an arc distance
of 150.71 feet to a point which bears South 23 degrees 36 minutes 53 seconds East from said radius point, said end of curve
being a point of reverse curvature of a curve to the right having a radius of 520.30 feet, the radius point of which bears
South 23 degrees 36 minutes 53 seconds East; thence easterly along said curve an arc distance of 252.26 feet to a point
which bears North 04 degrees 09 minutes 52 seconds East from said radius point; thence North 00 degrees 18 minutes 41
seconds West a distance of 156.45 feet; thence North 89 degrees 41 minutes 19 seconds East a distance of 217.35 feet;
thence North 01 degree 19 minutes 26 seconds West 277.04 feet to the south line of a tract of land recorded as Instrument
No. 2009069918 in said Recorder's Office; thence South 88 degrees 40 minutes 34 seconds West parallel with the North line
of the said Northeast Quarter and along the south line of said land a distance of 847.34 feet to the aforesaid easterly
right -of -way line of Pennsylvania Street; thence South 00 degrees 07 minutes 31 seconds East along said easterly
right -of -way line a distance of 413.25 feet to the Point of Beginning, containing 7.847 acres, more or less.
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° A6 LOCATION OF ALL LOTS AND PROPOSED SITE IMPROVEMENTS:
0- The site will not be subdivided; therefore, there are no individual lots on the property. The Site Plan shows the proposed site
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improvements.
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° A7 HYDROLOGIC UNIT CODE (HUC):
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'D A8 STATE ND FEDERAL WATER QUALITY PERMITS:
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C2 None are required for this project.
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1-1 Ag SPECIFIC POINT WHERE STORMWATER DISCHARQE WILL LEAVE THE SITE
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U) Stormwater drainage from the site will be conveyed by a proposed storm sewer to a proposed wet detention pond.
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j A10 LOCATION AND NAME OF ALL WETLANDS, I AKPS AND WATERCOURSES AN AND ADJACENT TO THE SITE
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Fertig Regulated Drain is located east of the project site.
0 All IDENTIFICATION OF ALL RECEIVING WATERS:
The ultimate receiving water is White River - Carmel Creek.
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ri Al2 IDENTIFICATION OF ALL POTENTIAL DISCHARGES TO GROUND WATER
There are no locations on site where surface water may be discharged into ground water.
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j A13 100 -YEAR FLOODPLAINS. FLOODWAYS, AND FLOODWAY FRINGES:
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° The site does note lie within a floodplain, floodway, or floodway fringe. The information was obtained from Flood Insurance
1_� Rate Map (FIRM) for Hamilton County, Indiana, Community City of Carmel, Community Number 180081, Panel Number 0209G,
° dated January 29, 2010.
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A14 PRE - CONSTRUCTION AND POST - CONSTRUCTION ESTIMATE OF PEAK DISCHARGE
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Z Pre - construction 10 -year discharge: 9.05 cfs
aPost - construction 10 -year discharge: 0.78 cfs
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° A15 ADJACENT LAND USE
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North: Commercial
V) East: Commercial
South: Commercial
} West: Commercial
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UJ I A16 LOCATIONS AND APPROXIMATE BOUNDARIES OF ALL DISTURBED AREAS:
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``' Refer to the Erosion Control Plan for the construction limits.
a A17 IDENTIFICATION OF EXISTING VEGETATIVE COVER:
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At this time, grass cover exists.
I A18 SOILS MAP INCLUDING SOIL DESCRIPTION AND LIMITATIONS,
Soil information from the county Soil Survey is on the Erosion Control Plan. This site has Brookston silty clay loam,
� Crosby silt loam, and Miami silt loam soils.
1w_ The suitability of the soils for shallow excavations ranges from somewhat limited to very limited. The on -site soil will
o be treated as recommended by the geotechnical or structural engineer if the conditions are unsuitable for a building.
1_ Remedial treatments may include, but are not limited to, removal of unsuitable soil and backfilling with engineered
0 material or installation of a geofabric within or under the floor system.
r- The suitability of the soils for local roads and streets is very limited. The on -site soil will be treated as
recommended by the geotechnical engineer if the conditions are unsuitable for the pavement system. Remedial
treatments may Include, but are not limited to, removal of unsuitable soil and backfilling with engineered material,
J installation of a geofabric within or under the pavement system, or treatment of the subgrade with lime.
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° (nn The suitability of the soils for lawns and landscaping ranges from not limited to very limited. The on -site soil will be
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o treated as recommended by the geotechnical engineer if the conditions are unsuitable for lawns and landscaping.
J Remedial treatments may include, but are not limited to, removal of unsuitable soil and backfilling with engineered
Fif a- a material.
Other suitability or limitations of the soil for the other classifications of use are not applicable to this project.
The following potential pollutant sources may be associated with construction activities on site:
No solid material, including building materials, is permitted to be discharged to surface waters or buried on site. All
A19 LOCATIONS, SIZE. AND DIMENSIONS FOR PROPOSED STORMWATER SYSTEMS:
solid waste materials, including disposable materials incidental to the construction activity, must be collected in
2. Construction waste material.
containers or closed dumpster's. The collection containers must be emptied periodically and the collected material
Locations of stormwater systems: See Grading Plan
hauled to a landfill permitted by the State and /or appropriate local municipality to accept the waste for disposal.
Size of storm sewer: See Grading Plan
Details of storm inlets and manholes: See Site Details
A foreman or supervisor should be designated in writing to oversee, enforce, and instruct construction workers on
A20 PLANS FOR ANY OFF -SITE CONSTRUCTION ACTIVITIES ASSOCIATED WITH THIS PROJECT:
proper solid waste procedures.
Hazardous Waste:
Off -site construction activities shall consist of connections to existing utility services.
Whenever possible, minimize the use of hazardous materials and generation of hazardous wastes. All hazardous waste
7. Litter.
materials will be disposed in the manner specified by federal, state, or local regulations or by the manufacturer.
A21 LOCATIONS OF PROPOSED SOIL STOCKPILES AND /OR BORROW ISPOSAL•
Use containment berms in fueling and maintenance areas and where potential for spills is high.
Excess soil shall be immediately stockpiled and seeded and /or removed from the construction
site in accordance with A foreman or supervisor should be designated in writing to oversee, enforce and instruct construction workers on
all applicable laws.
proper hazardous waste procedures. The location of any hazardous waste storage areas should be indicated on the
A22 EXISTING SITE TOPOGRAPHY:
stormwater pollution prevention plan by the operator following on -site location of the facility.
Refer to the Existing Topography Plan Sheet.
Dust Control /Off -Site Vehicle Tracking;
During construction, water trucks should be used, as needed, by each contractor or subcontractor to reduce dust.
A23 PROPOSED FINAL SITE TOPOGRAPHY:
After construction, the site should be stabilized to reduce dust.
3 . Plastic drainage pipe.
Construction traffic should enter and exit the site at a Construction Entrance with a rock pad or equivalent device.
Refer to the Grading Plan.
The purpose of the rock pad is to minimize the amount of soil and mud that is tracked onto existing streets. If
5. Concrete drainage pipe.
sediment escapes the construction site, off -site accumulations of sediment must be removed at a frequency
R1 DESCRIPTION OF POTENTIAL POLLUTANT SOURCES ASSOCIATED WITH CONSTRUCTION ACTIVITIES:
sufficient to minimize offsite impacts.
The following potential pollutant sources may be associated with construction activities on site:
Soil Stabilization Inspections:
Seeded areas will be inspected to confirm that a healthy stand of vegetation is maintained. The site has achieved
final stabilization once all areas are covered with pavement or have a stand of vegetation with at least 70% of the
background vegetation density. The density of 70% or greater must be maintained to be considered as stabilized. The
operator or their representative will water, fertilize, and reseed disturbed areas as needed to achieve this goal.
Erosion and Sediment Control Inspections:
All controls should be inspected at least once every seven (7) calendar days and following any storm event of 0.5
inch or greater. The following is a list of inspection /maintenance practices that will be used for specific controls:
1. Geotextiles /Erosion Control Mats: Missing or loose matting must be replaced or re- anchored.
2. Inlet Protection: Sediment should be removed when it reaches approximately one -half the height of the fence. If
a sump is used, sediment should be removed when the volume of the basin is reduced by 509'•.
3. Diversion Swales: Clean debris or other obstructions as needed. Damage from storms or normal construction
activities (i.e., tire ruts) shall be repaired immediately.
4. Mulching: Inspect for thin or bare spots caused by natural decomposition or weather - related events. Mulch in
high traffic area should be replaced on a regular basis to maintain uniform protection.
5. Sediment Trap: Accumulated silt shall be removed and the basin shall be regarded to its original dimensions at
such point that the capacity of the impoundment has been reduced to one -half of its original storage capacity.
The removed sediment shall be stockpiled or redistributed in areas that are protected from erosion.
6. Sediment Basin: Inspect frequently to check for damage and to ensure obstructions are not diminishing the
effectiveness of the structures. Sediment shall be removed and the basin shall be regarded to its original
dimensions at such point that the capacity of the impoundment has been reduced to 20% of its original storage
capacity. The removed sediment shall be stockpiled or redistributed in areas that are protected from erosion.
7. Silt Fence: Removal of built -up sediment will occur when the sediment reaches one -third the height of the fence.
8. Stabilized Construction Entrance: Periodic regarding and top dressing with additional stones.
9. Straw Bales: Replace straw bales that show signs of deterioration.
10. Vegetation: Protect newly seeded areas from excessive runoff and traffic until vegetation is established. Establish
a watering and fertilizing schedule.
11. Good Housekeeping: Litter, construction debris, and construction chemicals exposed to stormwater shall be
prevented from becoming a pollutant source for stormwater discharges through screening of outfalls and daily
pickup of litter.
In the event that sediment escapes the construction site, off -site accumulations of sediment must be removed at a
frequency sufficient to minimize adverse impacts. An example of this may be the situation where sediment has
washed into the street and could be carried into the storm sewers by the next rainfall and /or pose a safety hazard
to users of public streets.
Modifications /Revisions to SWPPP;
Based on inspection results, any necessary modification to this SWPPP shall be implemented within seven (7) calendar
days of the inspection. A modification is necessary if a control measure or operational procedure does not provide
adequate pollutant control. All revisions shall be recorded on a Record of Revisions within seven calendar days of the
inspection.
It is the responsibility of the operator to maintain effective pollutant discharge controls. Physical site conditions or
contractor /subcontractor practices could make it necessary to install more controls than were originally planned. For
example, localized concentrations of surface runoff or unusually steep areas could require additional silt barrier or
other structural controls. Assessing the need for and installing additional controls will be a continuing
contractor /subcontractor responsibility until final stabilization is achieved. Contractors and subcontractors
implementing this SWPPP must remain alert to the need to periodically refine and update this SWPPP in order to
accomplish the intended goals.
Notice of Termination:
Compliance of the site with the General Construction Permit remains the responsibility of all operators that have
submitted an NOI until such time as they have submitted a Notice of Termination (NOT). The permittee's
authorization to discharge under the General Construction Permit terminates at midnight of the day the NOT is
signed.
All permittees must submit an NOT within thirty (30) days after one or more of the following conditions have been
met:
1. Final stabilization has been achieved on all portions of the site for which the permittee was responsible.
2. Another operator /permittee has assumed control over all areas of the site that have not been finally stabilized.
3. In residential construction operations, temporary stabilization has been completed and the residence has been
transferred to the homeowner.
R15 EROSION AND SEDIMENT CONTROL SPECIFICATIONS FOR INDIVIDUAL BUILDING LOTS:
Since the entire site is under a single ownership, there are not any individual building lots.
C1 DESCRIPTiON OF POLLUTANTS AND THEIR SOURCES ASSOCIATED NTH THE PROPOSED LAND USE;
The proposed land use is commercial. The pollutants and sources of each pollutant normally expected from this type
of land use are listed below:
Pollutant Source: Passenger vehicles, delivery vehicles.
Type of Pollutant: Oil, gasoline, diesel fuel, any hydroc arbon associated with vehicular fuels and lubricants, grease,
antifreeze, windshield cleaner solution, brake fluid, brake dust, rubber, glass, metal and plastic fragments, grit, road
de -icing materials.
Pollutant Source: Commercial building.
Type of Pollutant: Cleaning solutions or solvents, leaks from HVAC equipment, grit from roof drainage, aggregate or
rubber fragments from roofing system.
Pollutant Source Trash dum p ster.
Type of Pollutant: Cleaning solutions or solvents, litter (paper, p lastic g eneral refuse associated with distribution
operations), uneaten food products, bacteria.
Pollutant Source: Parking lot.
Type of Pollutant: Any pollutant associated with vehicular sources, grit from asphalt wearing surface, bituminous
compounds from periodic maintenance (sealing, resurfacing and patching), pavement de -icing materials, paint
fragments from parking stall stripes, concrete fragments, wind -blown litter from off -site sources, elevated water
temperatures from contact with impervious surfaces.
Pollutant Source: Lawn and landscape areas.
Type of Pollutant: Fertilizers, soil, organic material (leaves, mulch, grass clippings)
The anticipated pollution sources are the vehicles that will use facility, including both delivery trucks and passenger
vehicle traffic. Possible pollutants include oil, gasoline, anti - freeze and other pollutants associated with vehicular
traffic.
C2 SEQUENCE DESCRIBING STORMWATER QUALITY MEASURE IMPLEMENTATION:
The proposed stormwater detention pond and AquaSwirls will remain in place as permanent BMPs after construction is
completed.
C3 DESCRIPTION OF PROPOSED POST - CONSTRUCTION STORMWATER QUALITY MEASURES:
Grading and Drainage:
Top soil will be placed in lawn areas and seeded with grass and graded; not to exceed 3:1 slopes. proposed
landscape trees and shrubs will also be added. These bio areas will act as a natural filter strip to help improve
storm water quality. The vegetated areas will slow the velocities of storm water runoff, reduce sediment runoff, and
reduce problems associated with mud or dust from bare soils.
Detention Pond:
All of the site drainage will be directed through the detention system prior to discharge. The detention pond
encourages sediment removal by providing more time for settling and infiltration to occur.
Hydrodynamic Separator (AguaSwirl):
The site drainage from the proposed skilled care and assisted living facility will be directed through one of two swirl
concentrators before being discharged to the proposed detention pond. The swirl concentrator uses vortex motion to
help separate sediment and floatables from the stormwater.
Good Housekeeping measures:
Good Housekeeping measures such as regular street sweeping, installation of trash receptacles, and reduction in
fertilizer oversproy can be incorporated by the owner and /or occupant.
Ca LOCATION. DIMENSIONS SPECIFICATIONS_ AND CONSTRUCTION DETAILS OF EACH STORMWATER QUALITY MEASURE:
The following items are stormwater quality measures that will be installed during construction. These items will
remain in place after construction is completed and are considered to serve an incidental function as
post- construction stormwater quality BMPs.
Grass Strips;
Grass strips and vegetation will act as a natural filter strip to aide in storm water quality.
Detention Pond:
There is one proposed wet detention pond located on the northeast corner of the property.
Hydrodynamic Separator:
The Aquaswirls have been located at the downstream ends of the storm sewer system, just upstream of the
proposed detention pond. The layout of the system can be found on the Grading Plan and the Dimensions,
Specifications and Construction Details can be found within the Site Detail sheets.
Post construction maintenance requirements for the vegetated areas, detention pond, and hydrodynamic separators
are to include periodic inspection as needed or at least every six months. Sediment shall be disposed of off site in
accordance with all applicable laws. Areas that show signs of erosion shall be stabilized with erosion control blanket
and /or seed as necessary. Refer to the Stormwater Operations and Maintenance Manual for detailed inspection and
maintenance procedures.
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REVISIONS
STORMWATER
POLLUTION
PREVENTION PLAN
SHEET NO.
C -505 OF
DATE: 05/17/2013
DRAWN BY: JCS
Contractors and subcontractors must comply with all state and local sanitary sewer, portable toilet, or septic system
1. Material storage areas (more specifically described below).
regulations. Sanitary facilities shall be provided at the site by each contractor or subcontractor throughout
2. Construction waste material.
construction activities. The sanitary facilities should be utilized by all construction personnel and be serviced regularly.
3. Fuel storage areas and fueling stations.
All expenses associated with providing sanitary facilities are the responsibility of the contractors and subcontractors.
4. Exposed soils.
The location of any sanitary facilities should be indicated on the stormwater pollution prevention plan by the operator
5. Leaking vehicles and equipment.
following on -site location of said facilities.
6. Sanitary waste from temporary toilet facilities.
Water Source:
7. Litter.
8. Windblown dust.
Water used to establish and maintain grass, to control dust, and for other construction purposes must originate from
9. Soil tracking off site from construction equipment.
a public water supply or private well approved by the State or local health department.
The following construction materials will be staged or stored on site at various points during development of the site:
Equipment Fueling and Storage Areas:
1. Structural fill.
as i.e. bermed area). Leaking
Equipment fueling, maintenance, and cleaning should only be completed in protected are ( ) g
equipment and maintenance fluids will be collected and not allowed to discharge onto soil where they may be washed
2. Road Bas e
away during a rain event.
3 . Plastic drainage pipe.
4. Water main pipe and appurtenances.
Equipment wash down (except for wheel washes) should take place within an area surrounded by a berm. The use of
5. Concrete drainage pipe.
detergents is prohibited.
6. Precast concrete manholes.
7. Rock rip -rap.
Hazardous Material Storage:
STORMWAX8 QUALITY MEASURE IMPLEMENTATION RELATIVE TO LAND-DISTURBING .
Chemicals, paints, solvents, fertilizers, and other toxic or hazardous materials should be stored in their original
R2 SEQUENCE DESCRIBING
containers (if original container is not resealable, store the products in clearly labeled, waterproof containers). Except
during application, the containers should be kept in trucks or in bermed areas within covered storage facilities.
1. Schedule pre- constructin meeting with City of Cannel Engineering Office at least 48 hrs prior to land disturbance.
Runoff containing such materials shall be collected, removed from the site, and disposed of in accordance with the
2. Install construction entrance.
federal, state, and local regulations.
3. Utilize the gravel construction entrance for installation of the perimeter silt fence. Add stone if needed. Post the
NOI at the entrance. Add protection measures to existing inlets.
As may be required by federal, state or local regulations, the Contractor should have a Hazardous Materials
4. Install staging area, fueling station, material storage area and concrete truck washout.
Management Plan and /or Hazardous Materials Spill and Prevention Program in place. A foreman or supervisor should
5. Strip the top soil and grade.
be designated in writing to oversee, enforce, and instruct construction workers on proper hazardous materials storage
6. Complete the cut and fills on the site. Final grade and seed the pond slopes. Install check dams or stabilize the
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and handling procedures. The location of any hazardous material storage areas should be indicated on the stormwater
slopes with erosion control blankets.
P ollution prevention plan by the operator following on -site location of the storage areas.
7. Prior to building construction install stone surface for paved areas.
Spill Prevention-,
8. Building pads left dormant for more than 15 days, must be temporarily seeded.
Material Handling and
9. Start building construction. Install staging area for building materials.
Discharge of hazardous substances or oil into stormwater is subject to reporting requirements. In the event of a spill
10. Install storm sewer and other utilities. Provide inlet protection immediately upon completion of the inlet and install
of a hazardous substance, the operator is required to notify the National Response Center (1- 800 - 424 -8802) to
riprap outlet protection prior to installing outlets. Final grade and stabilize slopes when inlets are functioning.
properly report the spill. In addition, the operator shall submit a written description of the release (including the
ter of the site.
11. Seed the perimeter
h release and the steps to
type and amount of material released, the date of the release, the circumstances of the p
12. Complete utility installation, curbs, paving, and building construction.
be taken to prevent future spills) to the local Soil and Water Conservation District. The SWPPP must be revised
13. Install landscaping plant material and stabilize all disturbed areas.
within 14 calendar days after the release to reflect the release, stating the information above along with
14. Remove all erosion and sediment control practices when areas have a uniform grass cover.
modifications to minimize the possibility of future occurrences. Each contractor and subcontractor is responsible for
R3 STABLE CONSTRUCTION ENTRANCE LOCATIONS AND SPECIFICATIONS:
-
complying with these reporting requirements.
Refer to the Erosion Control Plan for location and Erosion Control Details for details.
Concrete Washout:
All concrete trucks waste material shall be completely contained and disposed in accordance with all local, state, and
64 SEDIMENT CONTROL MEASURES FOR SHEET FLOW AREAS:
federal regulations. A pit or container is required when cleaning concrete chutes.
Sheet flow areas will be protected by seed and mulch or hydroseeding. Erosion control blankets will be installed on
sloped areas where the slope exceeds 6:1 (horizontal to vertical). Silt fence will be installed to prevent sedimentation
Spill Respoose Plan:
Minor -Small spills that typically involve oil gasoline, paint, hydraulic fluid etc. Minor spills can be controlled by the
from leaving the site. Because lengths and heights of the slopes are small, more aggressive erosion control measures
first responder at the discovery the spill.
• Contain spill to prevent material from entering storm or ground water. Do not flush with water bury.
were not considered. Refer to the Erosion Control Plan for locations and Erosion Control Details for details.
•Use absorbent material to clean -up spill material and any subsequently contaminated soil and dispose of properly.
Ra SEDIMENT CONTROL MEASURES FOR C ONCENTRATED FLOW AREAS;
Semi- Spills _ Approximately ten gallons or less of pollutant with no contamination of ground or surface
waters. Minor spills can be generally controlled by the first responder with help from othe r site p ersonnel. This
Rip rap outlet protection will be provided for the storm sewer outlet. Refer to the Erosion Control Plan for locations
response may require other operations to stop to make sure the spill is quickly and safely addressed. At the
and Erosion Control Details for details.
discovery of the spill:
• Contain spill to prevent material from entering storm or ground water. Do not flush with water or bury.
SEWER INLET PROTECTION MEASURE LOCATIONS AND SPECIFICATIONS;
PROTECTION
• Use absorbent material to clean -up spills and dispose of properly. Spills on impervious surfaces should be
B6 STORM
contained with a dry absorbent. Spills on clayey soils should be contained by constructing an earthen dike and
should be disposed of as soon as possible to prevent migration deeper into the soil and groundwater. Dispose of
The contractor shall install inlet protection in each inlet in paved areas and silt fence inlet protection around each
contaminated soils or absorbents properly.
inlet in grass areas. Refer to the Erosion Control Plan for locations and refer to Erosion Control Details for details.
" Contact 911 if this spill could be a safety issue.
• Contact supervisors and designated inspectors immediately
B7 RUNOFF CONTROL MEASURES:
• Contaminated solids to be removed to an approved landfill.
Silt fence will be installed around the perimeter of the site where runoff could potentially leave the site. Refer to the
- r death injury or illness to humans or
Major or Hazardous Spills More than ten gallons, there is the potential for �u y
Erosion Control Plan for locations and Erosion Control Details for details.
animals or has the potential for surface or groundwater pollution.
• Control or contain the spill without risking bodily harm. Temporarily plug storm drains if possible to prevent
migration of the spill into the stormwater system.
B8 STORMWATER OUTLET PROTECTION SPECIFICATIONS:
• Immediately contact the local Fire Department at 911 to report any hazard material spill.
• Contact supervisors and designated inspectors immediately. Other county or municipal officials (City of Carmel
The stormwater outlet will be protected by riprap aprons. Refer to the Erosion Control Plan for locations and the
Engineering Department) responsible for storm water facilities should be contacted as well. The contractor is
Erosion Control Details for details.
responsible for having these contact numbers available at the job site. A written report should be submitted to
the owner as soon as possible.
139 GRADE SIMILIZATION STRUCTURE LOCATIONS AND SPECIFICATIONS;
• As soon as possible but within 2 hours of discovery, contact the Department of Environmental Management, Office
noted for future reports to IDEM
of Emergency Response 1-888-233-7745. The following information should be p
A riprap apron at the outlet will be utilized to prevent grade destabilization. Refer to Erosion Control Plan for
or the National Response Center.
locations and Erosion Control Details for details.
o Name, address and phone number of person making the spill report
o The location of the spill
SPECIFICATIONS. AND CONSTRUCTION DETAILS OF EACH STORMWATER MEASURE:
o The time of the spill
B10 LOCATION, DIMENSIONS_ QUALITY
V Identification of the spilled substance
o Approximate quantity of the substance that has been spilled or may be further spilled
The proposed detention pond will provide a sediment removal function in addition to the primary function of
o The duration and source of the spill
controlling peak discharges from the site.
o Name and location of the damaged waters
o Name of spill response organization
B11 TEMPORARY SURFACE STABILIZATION METHODS APPROPRIATE FOR EACH SEASON_;
o What measures were taken in the spill response
o Other information that may be significant
Refer to the Erosion Control Details, within the Seasonal Soil Protection Chart.
Additional regulation or requirements may be present. A spill response professional should be consulted to make sure
all appropriate and required steps have been taken. Contaminated solids should only be removed from the site after
B12 PERMANENT SURFACE STABILIZATION �ECIFlGATIONS•
approval is given by Emergency Response.
A. Loosen lawn area to a minimum depth of 6 inches. Mix soil amendments and fertilizers with topsoil at rates
B14 MONITORING AND MAINTENANCE GUIDELINES FOR EACH PROPOSED STORMWATER QUALITY MEASURE:
specified. Organic soil amendments such as peat, compost or manure shall be applied at 2" depth evenly over
soil and incorporated into the top 6" of topsoil. Provide fertilizer with percentage of nitrogen required to provide
Inspection Schedule /Reporting:
not less than 1 pound of actual nitrogen per 1,000 sq. ft. of lawn area and not less than 4 percent phosphoric
acid and 2 percent potassium. At least 50 percent of nitrogen to be organic form. Delay mixing of fertilizer if
All impacted areas, as well as all erosion and sediment control devices, will be inspected every seven (7) calendar days and
planting will not follow placing of planting soil within a few days.
within 24 hours after a rainfall of 0.5 inch or greater. Where sites have been final or temporarily stabilized or on sites where
B. Fertilizer for lawns: provide a fast release fertilizer with a composition of 1 lb per 1,000 sq. ft. of actual
runoff is unlikely due to winter conditions (e.g., site is covered with snow, ice, or frozen ground exists), such inspections
nitrogen, 4 percent phosphorous, and 2 percent potassium by weight.
shall be conducted at least once every month.
C. Slow- release fertilizer for trees and shrubs: granular fertilizer consisting of 50 percent water - insoluble nitrogen,
phosphorous and potassium made up of a composition by weight of 5 percent.
Inspections shall be conducted and a written report prepared, by a designated and qualified person familiar with the USEPA
D. Grade lawn and grass areas to a smooth, even surface with loose, uniformly fine texture. Limit fine grading to
NPDES Storm Water General Permit, this SWPPP, and the Project.
areas that can be planted within immediate future. Remove trash, debris, stones larger than 1 inch diameter, and
other objects that may interfere with planting or maintenance operations.
Inspection reports shall be completed including scope of the inspection, name(s) and qualifications of personnel making the
E. Sow seed using a spreader or seeding machine. Do not seed when wind velocity exceeds 5 miles per hour.
inspection, the date of the inspection, observations relating to the implementation of the SWPPP, and any actions taken as
a result of incidents of noncompliance noted during the inspection. The inspection report should state whether the site was
Distribute seed evenly over entire area by sowing equal quantity in 2 directions at right angles to each other.
in compliance or identify any incidents of noncompliance. The contractor shall keep a copy of the inspection reports on site
F. Rake seed lightly into top 1/8 inch of soil, roll lightly, and water with a fine spray.
and permanently for a period of two years following construction. The on -site reports may be requested by inspections
G. Install erosion control blankets as indicated on the plan.
conducted by the local Soil and Water Conservation District.
H. Protect seeded areas against erosion by spreading clean, seed -free straw mulch after completion of seeding
operations. Spread uniformly to form a continuous blanket not less than 1 -1/2 inches loose measurements over
Construction Entrance:
seeded areas.
I. Water newly planted lawn areas and keep moist until new grass is established. Immediately repair any lawn areas
Locations where vehicles exit the site shall be inspected for evidence of off -site sediment tracking. Each contractor and
disturbed by construction activities including tree and shrub installation.
subcontractor shall be responsible for maintaining the Construction Entrance and other controls as described in this SWPPP.
J. Refer to the Erosion Control Details, within the Seasonal Soil Protection Chart for timing of temporary and
ci
permanent seeding and grass seed spefications.
Material Stora a Inspections:
g
Inspectors must evaluate areas used for storage of materials that are exposed to precipitation. The purpose is to ensure
that materials are protected and /or impounded so that pollutants cannot discharge from storage areas. Off -site material
storage areas used solely by the subject project are considered to be part of the project and must be included in
the erosion control plans and the site inspection reports.
Soil Stabilization Inspections:
Seeded areas will be inspected to confirm that a healthy stand of vegetation is maintained. The site has achieved
final stabilization once all areas are covered with pavement or have a stand of vegetation with at least 70% of the
background vegetation density. The density of 70% or greater must be maintained to be considered as stabilized. The
operator or their representative will water, fertilize, and reseed disturbed areas as needed to achieve this goal.
Erosion and Sediment Control Inspections:
All controls should be inspected at least once every seven (7) calendar days and following any storm event of 0.5
inch or greater. The following is a list of inspection /maintenance practices that will be used for specific controls:
1. Geotextiles /Erosion Control Mats: Missing or loose matting must be replaced or re- anchored.
2. Inlet Protection: Sediment should be removed when it reaches approximately one -half the height of the fence. If
a sump is used, sediment should be removed when the volume of the basin is reduced by 509'•.
3. Diversion Swales: Clean debris or other obstructions as needed. Damage from storms or normal construction
activities (i.e., tire ruts) shall be repaired immediately.
4. Mulching: Inspect for thin or bare spots caused by natural decomposition or weather - related events. Mulch in
high traffic area should be replaced on a regular basis to maintain uniform protection.
5. Sediment Trap: Accumulated silt shall be removed and the basin shall be regarded to its original dimensions at
such point that the capacity of the impoundment has been reduced to one -half of its original storage capacity.
The removed sediment shall be stockpiled or redistributed in areas that are protected from erosion.
6. Sediment Basin: Inspect frequently to check for damage and to ensure obstructions are not diminishing the
effectiveness of the structures. Sediment shall be removed and the basin shall be regarded to its original
dimensions at such point that the capacity of the impoundment has been reduced to 20% of its original storage
capacity. The removed sediment shall be stockpiled or redistributed in areas that are protected from erosion.
7. Silt Fence: Removal of built -up sediment will occur when the sediment reaches one -third the height of the fence.
8. Stabilized Construction Entrance: Periodic regarding and top dressing with additional stones.
9. Straw Bales: Replace straw bales that show signs of deterioration.
10. Vegetation: Protect newly seeded areas from excessive runoff and traffic until vegetation is established. Establish
a watering and fertilizing schedule.
11. Good Housekeeping: Litter, construction debris, and construction chemicals exposed to stormwater shall be
prevented from becoming a pollutant source for stormwater discharges through screening of outfalls and daily
pickup of litter.
In the event that sediment escapes the construction site, off -site accumulations of sediment must be removed at a
frequency sufficient to minimize adverse impacts. An example of this may be the situation where sediment has
washed into the street and could be carried into the storm sewers by the next rainfall and /or pose a safety hazard
to users of public streets.
Modifications /Revisions to SWPPP;
Based on inspection results, any necessary modification to this SWPPP shall be implemented within seven (7) calendar
days of the inspection. A modification is necessary if a control measure or operational procedure does not provide
adequate pollutant control. All revisions shall be recorded on a Record of Revisions within seven calendar days of the
inspection.
It is the responsibility of the operator to maintain effective pollutant discharge controls. Physical site conditions or
contractor /subcontractor practices could make it necessary to install more controls than were originally planned. For
example, localized concentrations of surface runoff or unusually steep areas could require additional silt barrier or
other structural controls. Assessing the need for and installing additional controls will be a continuing
contractor /subcontractor responsibility until final stabilization is achieved. Contractors and subcontractors
implementing this SWPPP must remain alert to the need to periodically refine and update this SWPPP in order to
accomplish the intended goals.
Notice of Termination:
Compliance of the site with the General Construction Permit remains the responsibility of all operators that have
submitted an NOI until such time as they have submitted a Notice of Termination (NOT). The permittee's
authorization to discharge under the General Construction Permit terminates at midnight of the day the NOT is
signed.
All permittees must submit an NOT within thirty (30) days after one or more of the following conditions have been
met:
1. Final stabilization has been achieved on all portions of the site for which the permittee was responsible.
2. Another operator /permittee has assumed control over all areas of the site that have not been finally stabilized.
3. In residential construction operations, temporary stabilization has been completed and the residence has been
transferred to the homeowner.
R15 EROSION AND SEDIMENT CONTROL SPECIFICATIONS FOR INDIVIDUAL BUILDING LOTS:
Since the entire site is under a single ownership, there are not any individual building lots.
C1 DESCRIPTiON OF POLLUTANTS AND THEIR SOURCES ASSOCIATED NTH THE PROPOSED LAND USE;
The proposed land use is commercial. The pollutants and sources of each pollutant normally expected from this type
of land use are listed below:
Pollutant Source: Passenger vehicles, delivery vehicles.
Type of Pollutant: Oil, gasoline, diesel fuel, any hydroc arbon associated with vehicular fuels and lubricants, grease,
antifreeze, windshield cleaner solution, brake fluid, brake dust, rubber, glass, metal and plastic fragments, grit, road
de -icing materials.
Pollutant Source: Commercial building.
Type of Pollutant: Cleaning solutions or solvents, leaks from HVAC equipment, grit from roof drainage, aggregate or
rubber fragments from roofing system.
Pollutant Source Trash dum p ster.
Type of Pollutant: Cleaning solutions or solvents, litter (paper, p lastic g eneral refuse associated with distribution
operations), uneaten food products, bacteria.
Pollutant Source: Parking lot.
Type of Pollutant: Any pollutant associated with vehicular sources, grit from asphalt wearing surface, bituminous
compounds from periodic maintenance (sealing, resurfacing and patching), pavement de -icing materials, paint
fragments from parking stall stripes, concrete fragments, wind -blown litter from off -site sources, elevated water
temperatures from contact with impervious surfaces.
Pollutant Source: Lawn and landscape areas.
Type of Pollutant: Fertilizers, soil, organic material (leaves, mulch, grass clippings)
The anticipated pollution sources are the vehicles that will use facility, including both delivery trucks and passenger
vehicle traffic. Possible pollutants include oil, gasoline, anti - freeze and other pollutants associated with vehicular
traffic.
C2 SEQUENCE DESCRIBING STORMWATER QUALITY MEASURE IMPLEMENTATION:
The proposed stormwater detention pond and AquaSwirls will remain in place as permanent BMPs after construction is
completed.
C3 DESCRIPTION OF PROPOSED POST - CONSTRUCTION STORMWATER QUALITY MEASURES:
Grading and Drainage:
Top soil will be placed in lawn areas and seeded with grass and graded; not to exceed 3:1 slopes. proposed
landscape trees and shrubs will also be added. These bio areas will act as a natural filter strip to help improve
storm water quality. The vegetated areas will slow the velocities of storm water runoff, reduce sediment runoff, and
reduce problems associated with mud or dust from bare soils.
Detention Pond:
All of the site drainage will be directed through the detention system prior to discharge. The detention pond
encourages sediment removal by providing more time for settling and infiltration to occur.
Hydrodynamic Separator (AguaSwirl):
The site drainage from the proposed skilled care and assisted living facility will be directed through one of two swirl
concentrators before being discharged to the proposed detention pond. The swirl concentrator uses vortex motion to
help separate sediment and floatables from the stormwater.
Good Housekeeping measures:
Good Housekeeping measures such as regular street sweeping, installation of trash receptacles, and reduction in
fertilizer oversproy can be incorporated by the owner and /or occupant.
Ca LOCATION. DIMENSIONS SPECIFICATIONS_ AND CONSTRUCTION DETAILS OF EACH STORMWATER QUALITY MEASURE:
The following items are stormwater quality measures that will be installed during construction. These items will
remain in place after construction is completed and are considered to serve an incidental function as
post- construction stormwater quality BMPs.
Grass Strips;
Grass strips and vegetation will act as a natural filter strip to aide in storm water quality.
Detention Pond:
There is one proposed wet detention pond located on the northeast corner of the property.
Hydrodynamic Separator:
The Aquaswirls have been located at the downstream ends of the storm sewer system, just upstream of the
proposed detention pond. The layout of the system can be found on the Grading Plan and the Dimensions,
Specifications and Construction Details can be found within the Site Detail sheets.
Post construction maintenance requirements for the vegetated areas, detention pond, and hydrodynamic separators
are to include periodic inspection as needed or at least every six months. Sediment shall be disposed of off site in
accordance with all applicable laws. Areas that show signs of erosion shall be stabilized with erosion control blanket
and /or seed as necessary. Refer to the Stormwater Operations and Maintenance Manual for detailed inspection and
maintenance procedures.
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REVISIONS
STORMWATER
POLLUTION
PREVENTION PLAN
SHEET NO.
C -505 OF
DATE: 05/17/2013
DRAWN BY: JCS
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CHK'D BY:
RLN
JOB N0.
2013.00569
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