HomeMy WebLinkAbout04110042.31STORMWATER POLLUTION PREVENTION PLAN INDEX
Plan Index provided below
2 11 "x17" Plat denoting lot numbers, boundaries and streets is provided separately.
_ i Project Type: 22 lot single family subdivision.
�4 Vicinity Map: Denoted on Sheet C100
Legal Description of Project Site: See attached Secondary Plat and N01 Letter.
:.6 Location of all lots and proposed site improvements: See Development Plan Sheet C101.
14 Digit Hydrologic Unit Code: 05120201090060
_8 State or Federal water quality permits: None
1,9 Specific points where stormwater discharge will leave the site: The storm sewers are routed
through a detention pond prior to discharging into Elliot Creek. Elliot Creek flows
southeasterly. See Site Development Plan Sheets C101 -C102 for more detail.
=.10 Location of all wetlands, lakes & water courses on and adjacent to site: Elliot Creek is
located east of the site. See Site Development Plan Sheets C101 -C102 for more detail.
`11 Receiving Waters: Elliot Creek
2 Identification of potential discharges to groundwater: none.
100 Year Floodplains, Floodways and Flood Fringes: none.
�14 Pre - Construction and Post Construction Peak Discharge:
10 year Pre - Construction Peak Discharge = 63.2 cfs
10 year Post Construction Peak Discharge = 100.65 cfs
-'S Adjacent Land Use:
North: Single Family Residential - Village of WestClay Future Sections 9002 & 9003
South: Single Family Residential - Village of WestClay Section 1005 & 131st Street
East: Single Family Residential - Village of WestClay Sections 9004 & 9007
West: Single Family Residential and Estate Lots
X 1 6 Locations and approximate boundaries of all disturbed areas: See Sheets C103 -C104 for
locations.
"I Identification of existing vegetative cover: See Stormwater Pollution Prevention Plan -
Sheets C103 -C106.
;,15 Soils Map including descriptions and limitations: See sheet C805 for soils map, description
and limitations.
z19 Locations, size and dimensions of proposed stormwater systems: See Site Development Plan
Sheets C101 -C102 for proposed storm sewer system.
i' Locations, size and dimensions of any proposed off -site construction activities associated with
this project: None.
'21 Locations of Soil Stockpiles: Stockpile areas shall be located as for away from ponds, existing
storm sewer inlets and existing swales as possible. Stockpiles shall not be located closer
than 15 feet from property line. Stockpiles shall be immediately seeded and secured with silt
fence.
?2? Existing site topography. See Site Development Plan Sheets C101 -C102 for existing site
topography.
25' Proposed final topography. See Site Development Plan Sheets C101 -C102 site grading and
drainage patterns.
0l Description of potential pollutants sources associated with the construction activities: Silt
and sediment from exposed soils, leaves, mulch, vehicular sources such as leaking fuel or
oil, brake fluid, brake dust, trash, debris, biological agents found in trash, fertilizers,
herbicides, pesticides, acid rain, lime dust and concrete washout.
B2 Sequencing of stormwater quality implementation relative to land disturbonce activities: This
plan has been created in an effort to eliminate sediment from leaving the Village of WestClay
Section 1012 project during construction protecting the adjoining properties and Elliot Creek.
The majority of the existing watershed sheet drains to concentrated flow. The concentrated
flow conveys runoff into Elliot Creek.
PRECONSTRUCTON ACTIVITIES:
1. Coll the Indiana Underground Plant Protection systems, Inc. ( "Holey Mole;) at
1- 800 - 382 -5544 to check the location of any existing utilities. They should be
notified two working days before construction takes place.
2. A silt fence shall be installed at the edges of the project site where there is
potential for any stormwater runoff. Specifically, silt fence shall be installed along
the northern and eastern site boundaries of the site.
3. Inlet protection shall be placed at the existing curb inlet south of the project, along
131st Street, as depicted on plans.
4. Evaluate, mark and protect important trees and associated root zones. Evaluate
existing vegetation suitable for use as filter strips along the North, South, East and
West boundaries.
5. A construction entrance shall be placed per the plan location.
6. Establish construction staging area for equipment and vehicles as for from detention
ponds and swales as possible.
7. Establish onsite location for owner /operator /contractor placement of approved plans
and Rule 5 N01 and Rule 5 inspection documentation.
ESTABLISH SILT BASIN:
8. Install the temporary outfall (18" RCP) system for the temporary sediment basin
located at along the eastern boundary of the site. Per the Stormwoter Pollution
Prevention & Specifications Plan Details, extend with a perforated riser for the
temporary sediment basin.
9. After completion of the outfall pipe and perforated riser, commence construction of
the temporary diversion swales and temporary sediment basin.
CONSTRUCTION ACTIVITIES:
1. Once erosion and sediment control measures are in place, begin land clearing
followed immediately by rough grading. Do not leave large areas unprotected for
more than 15 days. Rule 5 requires that all disturbed areas that potentially will be
idle for 15 days or more will be stabilized (seeded, mulched, etc..) immediately.
2. After completion of mass grading, final grade and seed pond banks, landscape
berms, common areas and swales immediately after grading is completed.
3. Upon completion of mass grading, install sanitary and storm sewers. As storm
sewers are constructed, install inlet protection measures. Install riprop upon
completion of end section installation.
4. Upon completion of sewer installation and inlet protection, proceed with street
construction.
5. Liming of streets should be done prior to the installation of storm sewers to prevent
the transmission of lime dust to ponds or receiving waters.
6. Once pavement and curbs are in place, install curb inlet sediment barriers.
7. Once inlet protection is in place, final grade all areas. Upon completion of all
grading, verify depth of pond per plan requirement, dredge as needed.
R' Stable construction entrance location(s) and specifications. See Stormwater Pollution Prevention
Plan Sheets C103 -C106 for location and Sheet C805 for construction entrance details and
specifications.
34 Sediment control measures for sheet flow areas: See Stormwater Pollution Prevention Plan
Sheets C103 -C106 for locations of sediment control measures and Sheet C805 for
construction details and specifications.
U 0 Sediment control measures for concentrated flow areas: See Stormwater Pollution Prevention
Plan Sheets C103 -C106 for locations of sediment control measures and Sheet C805 for
construction details and specifications.
H6 Strom sewer inlet protection measures, locations and specifications: See Stormwater Pollution
Prevention Plan Sheets C103 -C106 for locations of inlet protection measures and Sheet C805
for construction details and specifications.
H 7 Runoff control measures: See Stormwater Pollution Prevention Plan Sheets C103 -C106 for
locations of runoff control measures and Sheet C805 for construction details and
specifications.
HP. Stormwater outlet protection specifications: See Stormwater Pollution Prevention Plan Sheets
C103 -C106 for locations of stormwater outlet control measures and Sheet C805 for
construction details and specifications.
99 Grade stabilization structure locations and specifications: See Stormwater Pollution Prevention
Plan Sheets C103 -C106 for locations of grade stabilization control meosures and Sheet C805
for construction details and specifications.
H 1; Location, dimensions, specifications and construction details of each stormwater quality
measure: See Stormwater Pollution Prevention Plan Sheets C103 -C106 for locations of various
stormwater quality measures and Sheet C805 for construction details and specifications.
B11 Temporary surface stabilization methods appropriate for each season: See Stormwater
Pollution Prevention Plan Sheets C103 -C106 for locations of temporary surface stabilization
measures and Sheet C805 for construction details and specifications.
B 12 Permanent surface stabilization specifications: See Stormwater Pollution Prevention Plan
Sheets C103 -C106 for locations of permanent surface stabilization measures and Sheet C805
for construction details and specifications.
H 1 z Material handling and spill prevention plan:
Purpose:
The intention of this Spill Prevention, Control and Countermeasures (SPCC) is to
establish the procedures and equipment required to prevent the discharge of oil
and hazardous substances in quantities that violate applicable water quality
standards, cause a sheen upon or discoloration of the surface of navigable waters
or adjoining shorelines, or cause sludge or emulsion to be deposited beneath the
surface of the water or adjoining shorelines. The Plan also establishes the activities
required to mitigate such discharges (i.e., countermeasures) should they occur.
Definitions
Pollutant: means pollutant of any kind or in any form, including but not limited
to sediment, paint, cleaning agents, concrete washout, pesticides, nutrients, trash,
hydraulic fluids, fuel, oil, petroleum, fuel oil, sludge, oil refuse, and oil mixed
with wastes other than dredged soil.
Dischorae:
Includes but is not limited to, any spilling, leaking, pumping, pouring, emitting,
emptying, or dumping.
Navigable Waters:
Means all waters of the United States that are connected with a navigable stream,
lake, or sea. [Note: This definition is usually interpreted to mean any
wastewater (even normally dry wash or storm sewer) that eventually drains into a
navigable stream].
Plan Review and Amendements:
This Plan shall be reviewed and /or amended, if necessary, whenever there is a
change in the design of the site, construction, operation, or maintenance which
materially affects the site's potential for the discharge of regulated material.
Prediction of Potential Sys:
1. Nearest Navigable Water: Elliot Creek
2. Drainage System: All storm drainage leaves the development site by swales and
closed storm systems which discharges into Elliot Creek which flows southeasterly.
3. Possible Spill Sources (During and post construction): Vehicular sources such as
leaking fuel or oil, brake fluid, grease, antifreeze; construction trash and debris,
biological agents found in trash and debris, fertilizers, household items including
but not limited to cleaning agents, chemicals, paint, herbicides and pesticides.
4. Groundwater Contamination:
The facility maintains NO above ground or under ground storage tanks at this site.
Therefore, it is felt that there is little or no possibility of post construction
groundwater contamination. The facility does have city sanitary sewer and city water.
Alert Procedures for Spills:
1. Any personnel observing a spill will immediately instigate the following
procedure:
a.) Dialing "0" from any telephone.
b.) Notify the appropriate emergency personnel.
2. The Emergency Coordinator will then take the following actions:
a.) Barricade the area allowing no vehicles to enter or leave the
spill zone.
Q Notify the Indiana Department of Environmental Management,
Office of Emergency Response by calling the appropriate
telephone number:
Office j-17- 233 -7745
Toll Free 800- 233 -7745
Also the National Response Center at 800 -424 -8802
and provide the following information:
- Time of observation of the spill
- Location of the spill
- Identity of material spilled
- Probable source of the spill
- Probable time of the spill
- Volume of the spill and duration
- Present and anticipated movement of the spill
- Weather conditions
- Personnel at the scene
- Action initiated by personnel
C.) Notify the City of Carmel Fire Department Phone: 9 -1 -1
d.) Notify the City of Carmel Police Department Phone: 9 -1 -1
e.) Notify waste recovery contractor, maintenance personnel or other
contractual personnel as necessary for cleanup.
f.) Coordinate and monitor cleanup until the situation has been
stabilized and all spills have been eliminated.
g.) Cooperate with the IDEM -OER on procedures and reports involved
with the event.
Cleanup Parameters:
1. The Developer / Homeowners Association shall be continually kept informed, maintain lists
of qualified contractors and available Vac - trucks, tank pumpers and other equipment
readily accessible for clean -up operations. In addition, a continually updated list of
available absorbent materials and clean -up supplies should be kept on site.
2. All maintenance personnel will be made aware of techniques for prevention of spills. They
will be informed of the requirements and procedures outlined in this plan. ihey will be
kept abreast of current developments or new information on the prevention of spills
and / or necessary alterations to this plan.
3. When spills occur which could endanger human life and this becomes primary concern, the
discharge of the life saving protection function will be carried out by the local police
and fire departments.
4. Absorbent materials, which are used in cleaning up spilled materials, will be disposed of in
a manner subject to the approval of the Indiana Department of Environmental
Management
5. Flushing of spilled material with water will not be permitted unless so authorized by the
Indiana Department of Environmental Management.
H'4 Monitoring and maintenance guidelines for pollution prevention measures:
Straw Bale Dam Maintenance Requirements
1. Inspect straw bale dams after each storm event and promptly remove any sediment
deposits to insure adequate storage volume for the next rain, taking care not to
undermine the entrenched bales.
2. Inspect periodically for deterioration or damage from construction activities and repair
immediately.
3. After the contributing drainage area has been stabilized, remove all straw bales and
sediment deposits, bring the disturbed area to grade and stabilize it.
Silt Fence Maintenance Requirements
1. Inspect the silt fence periodically and after each storm event.
2 If fence fabric tears, starts to decompose or in any way becomes ineffective, replace
the affected portion immediately.
3. Remove deposited sediment when it reaches half the height of the fence at it's lowest
point or is causing the fabric to bulge.
4. Take care to avoid undermining the fence during cleanout.
5. After the contributing drainage area has been stabilized, remove the fence and sediment
deposits, bring the disturbed area to grade and stabilize it.
Temporary Sediment Trap Maintenance Requirements
1. Inspect temporary sediment traps after each storm event and immediately repair any
erosion and piping holes.
2. Remove sediment when it has accumulated to one -half the design depth.
3. Replace spillway gravel facing when clogged.
4. Inspect vegetation and re -seed if necessary.
5. Check the spillway depth periodically to insure a minimum of 1.5 ft depth from the
lowest point of the settled embankment to highest point of the spillway crest and
fill any low areas to maintain desired elevation.
6. Promptly replace any displaced rip -rap, being careful that no stones in the spillway
are above design grade.
7. After all disturbed areas have been stabilized remove the structure and sediment,
smooth the site to blend with adjoining areas and stabilize it.
Sandbag Curb Inlet Barrier Maintenance Requirements
1. Inspect frequently for damage by vehicular traffic and repair if necessary.
2 Inspect after each storm event.
3. Remove sediment, without flushing, when it reaches half the height of the barrier.
4. Deposit removed sediment where it will not enter storm sewer drains.
Block and Gravel Curb Inlet Protection Maintenance Requirements
1. After each storm event remove the sediment and replace the gravel, replace the
geotextile fabric if used.
2. Periodically remove sediment and tracked -on soil from the street, without flushing, to
reduce the sediment load on the curb inlet protection.
3. Inspect periodically for damage and repair. Keep grates free of debris.
4. After the contributing drainage area has been stabilized, remove the gravel, wire mesh,
geotextile fabric and sediment deposits and dispose of them properly.
Erosion Control Blanket (Surface Applied) Maintenance Requirements
1. During vegetative establishment, inspect after each storm event for any erosion below
the blanket.
2. If any area(s) shows erosion, pull back that portion of the blanket covering it, re-
seed the area and relay and staple the blanket.
3. After vegetative establishment check the treated area periodically.
Temporary Gravel Construction Entrance Maintenance Requirements
1. Inspect entrance pad and sediment disposal area weekly and after storm events or
heavy use.
2. Reshape as needed for drainage and runoff control.
3. Topdress with clean stone as needed.
4. Immediately remove mud and sediment tracked or washed onto streets by brushing or
sweeping. Flushing should only be used if the water is conveyed into a sediment
trap or basin.
5. Repair any broken road pavement immediately.
91L Erosion & sediment control specifications for individual building lots: Sce Sheet C803 for
Construction details and specifications for erosion & sediment control on individual building
lots.
_ Description of pollutants and their sources associated with the proposed land use: Silt and
sediment from exposed soils, leaves, mulch, vehicular sources such as leaking fuel or oil,
brake fluid, brake dust, grease, antifreeze, metals, rubber fragments, road grit, salts and
sands, construction trash and debris, fertilizers, household items including but not limited to
cleaning agents, chemicals, paint, miscellaneous home improvement materials, toys, clothing
and animal waste, elevated storm runoff temperatures, acid rain pesticides and pathogens.
r
C2 m Sequence describing stormwater quality easu e implementation: p lementation:
1. Post construction water quality BMP's are to be installed during normal construction
activies of this project defined within construction documents.
A. Inspect and maintain all erosion control measures as detailed in the Stormwater
Pollution Prevention Measures Maintenance Requirements beginning immediately after
installation and continuing until vegetation has been sufficiently established and all
construction activity is complete.
B. Remove all individual inlet protection and straw bale dams, silt fences, etc. only
after seeding and sufficient veg etat iv e
g rowth has been establi shed in each area to
a point where sediment /pollutants will not enter the lake(s) or storm sewer system.
C. It is recommended that any proposed wetland areas and plantings (if any) be
constructed /placed after final grading and sufficient vegetative growth has been
established to a point where sediment /pollutants will not enter the proposed
wetlands.
D. Inspection and maintenance of all common areas and infrastructure improvements
is the responsibility of the owner /developer or his designee until improvements are
n r agencies.
association or local a
accepted for maintenance by homeowners assoc a g
E. Inspection and maintenance of individual lots s the responsibility of the home
builder or his designee until the homeowner buys and thereby accepts responsibility
for the individual lot.
C 5 Description of proposed post construction stormwater quality measures: Site and facility
r
design for stormwater quality protection on this site employs a multi-level st ategy consisting
g
of:
1. Reducing or eliminating post - project runoff.
2. Controlling sources of pollutants.
3. And if needed, treating contaminated stormwater runoff before discharging it into the
storm sewer system or receiving waters.
Typical stormwater quality measures for reducing, eliminating or controlling pollutants (source
controls) include:
a. Dention /Retention - Detain stormwater runoff on extended period of time to allow
pollutants that are suspended to settle out.
b. Reducing Runoff or Direct runoff from impervious areas - Reduction in volume of runoff
potentially carrying suspended solids and pollutants.
c. Vegetated strips and /or swales - Biological and chemical processes in soils and
vegetation to filter out pollutants.
d. Permanent erosion control seeding and plantings - Biological and chemical processes in
soils and vegetation to filter out pollutants.
e. Outlet protection & velocity dissipation devices - Prevent surface erosion resulting in
decreased suspended solids and preserving established downstream vegetative cover.
f. Rock slope protection - Prevent surface erosion resulting in decreased suspended solids.
g. Mulching - Prevent surface erosion resulting in decreased suspended solids.
It is the intent of this plan that the implementation of the above described storm water
quality measures be executed in accordance with the enclosed plans and details in order
to meet the requirements of Rule 5 storm water quality.
C4 Location, dimensions, specifications and construction details of stormwater quality measures:
See Stormwater Pollution Prevention Plan Sheets C103 -C106 for locations of permanent
stormwater quality measures and Sheet C805 construction details and specifications.
C5 Description of maintenance guidelines for proposed water quality measures: See attached
BMP Operations and Maintenance Manual.
ADDITIONAL STORMWATER POLLUTION PREVENTION
MEASURES
VEHICLE & EQUIPMENT MAINTENANCE
Description and Purpose
Prevent or reduce the contamination of stormwater resulting from vehicle and equipment
maintenance by running a "dry and clean site ". The best option would be to perform
maintenance activities at an offsite facility. If this option is not available then work should be
performed in designated areas only, while providing cover for materials stored outside,
checking for leaks and spills, and containing and cleaning up spills immediately.
Suitable Applications
These procedures are suitable on all construction projects where an onsite yard area is
necessary for storage and maintenance of heavy equipment and vehicles.
Limitation
Onsite vehicle and equipment maintenance should only be used where it is impractical to
send vehicles and equipment offsite for maintenance and repair. Sending vehicles /equipment
offsite should be done in conjunction with a Stabilized Construction Entrance /Exit. Outdoor
vehicle or equipment maintenance is a potentially significant source of stormwater pollution.
Activities that con contaminate stormwater include engine repair and service, changing or
replacement of fluids, and outdoor equipment storage and parking (engine fluid leaks).
Implementation
If maintenance must occur onsite, use designated areas, located away from drainage
courses. Dedicated maintenance areas should be protected from stormwater runon and
runoff, and should be located at least 50 ft from downstream drainage facilities and
watercourses.
Drip pans or absorbent pads should be used during vehicle and equipment maintenance
work that involves fluids, unless the maintenance work is performed over on
impermeable surface in a dedicated maintenance area.
Place a stockpile of spill cleanup materials where it will be readily accessible.
All fueling trucks and fueling areas are required to have spill kits and /or use other spill
protection devices.
Use adsorbent material, on small spills. Remove the absorbent materials promptly and
dispose of properly.
Inspect onsite vehicles and equipment daily at startup for leaks, and repair immediately.
Keep vehicles and equipment clean; do not allow excessive build -up of oil and grease.
Segregate and recycle wastes, such as greases, used oil or oil filters, antifreeze, cleaning
solutions, automotive batteries, hydraulic and transmission fluids. Provide secondary
containment and cover: for these materials if stored onsite.
Train employees and subcontractors in proper maintenance and spill cleanup procedures.
Drip pons or plastic sheeting should be placed under all vehicles and equipment placed on
docks, barges, or other structures over water bodies when the vehicle or equipment is
planned to be idle for more than 1 hour.
Properly dispose of used oils, fluids, lubricants, and spill cleanup materials.
Do not place used oil :n a dumpster or pour into a storm drain or watercourse.
Properly dispose of or recycle used batteries.
Do not bury used tires.
Repair leaks of fluids and oil immediately.
Listed below is further information if you must perform vehicle or equipment
maintenance onsite.
Inspection and Maintenance
Inspect and verify that BMPs are in place prior to the commencement of associated activities.
While activities associated with the BMP are under way, inspect weekly to verify continued BMP
implementation.
Keep ample supplies of spill cleanup materials onsite.
Maintain waste fluid containers in leak proof condition.
Vehicles and equipment should be inspected on each day of use. Leaks should be repaired
immediately or the problem vehicle(s) or equipment should be removed from the project site.
Inspect equipment for damaged hoses and leaky gaskets routinely. Repair or replace as
needed.
_ - rUELIh',
Description and Purpose
Vehicle equipment fueling procedures and practices are designed to prevent fuel spills and
eaks, and reduce or eliminate contamination of stormwater. This can be accomplished by
using offsite facilities, fueling in designated areas only, enclosing or covering stored fuel,
implementing spill controls, and training employees and subcontractors in proper fueling
procedures.
Limitations
Onsite vehicle and equipment fueling should only be used where it is impractical to send
vehicles and equipment offsite for fueling. Sending vehicles and equipment offsite should
be done in conjunction with a Stabilized Construction Entrance/ Exit.
Implementotion
Use offsite fueling stations as much as possible. These businesses are better equipped to
handle fu and spills properly. Performing this work offsite can also be economical by
eliminating the need for a separate fueling area at a site.
Discourage "t,,pping -off" of fuel tanks.
Absorbent spill cleanup materials and spill kits should be available in fueling areas and
on fueling trunks, and should be disposed of properly after use.
Drip pan=_ or obsorbent pads should be used during vehicle and equipment fueling, unless
the fue,,r g 's performed over an impermeable surface in a dedicated fueling area.
Use absorbent materials on small spills. Do not hose down or bury the spill. Remove the
adsorbent materials promptly and dispose of properly.
Arid mobile fueling of mobile construction equipment around the site; rather, transport
the equipment to designated ated fueling areas.
'rain employees and subcontractors in proper fueling and cleanup procedures.
Dedicated fueling areas should be protected from stormwater hunch and runoff, and should be
ccated at least 50 ft away from downstream drainage facilities and watercourses. Fueling
must be performed on level -grade areas.
P-tect fueling areas with berms and dikes to prevent runon, runoff, and to contain spills.
Nozzles ,sed in vehicle and equipment fueling should be equipped with on automatic shutoff
.. cc ,rt,a drips. Fueling operations should not be left unattended.
Federai, state, and local requirements should be observed for any stationary above ground
storage tanks.
;erection and Maintenance
Vehicles and equipment should be inspected each day of use for leaks. Leaks should be
repaired Immediately or problem vehicles or equipment should be removed from the project
site
Keep ample supplies of spill cleanup materials onsite.
Immediately clean up spills and properly dispose of contaminated soil and cleanup
materta!
rption and Pumps
Solid waste management procedures and practices are designed to prevent or reduce the
discharge of pollutants to stormwater from solid or construction waste by providing
designated woste collection areas and containers, arranging for regular disposal, and training
employees and subcontractors.
Suitable Applications
This BMr s suitable for construction sites where the following wastes ore generated or
stored:
Solid waste generated from trees and shrubs removed during land clearing, demolition of
existing strictures (rubble), and building construction
Packaging materials including wood, paper, and plastic
Scrap or surplus building materials including scrap metals, rubber, plastic, glass pieces and
masonry products
Domestic wastes including food containers such as beverage cans, coffee cups, paper
bogs, plastic wrappers, and cigarettes
Construction wastes including brick, mortar, timber, steel and metal scraps, pipe and
electrical cuttngs, nonhazardous equipment parts, styrofoom and other materials send
transport anc package construction materials
Implementotion
The following steps will help keep a clean site and reduce stormwater pollution:
Select designated waste collection areas onsite.
Inform trash- hauling contractors that you will accept only watertight dumpsters for onsite
use.
Inspect dumpsters for leaks and repair any dumpster that is not watertight
Provide an adequate number of containers with lids or covers that can be placed over the
container to keep rain out or to prevent loss of wastes when it is windy.
Plan for additional containers and more frequent pickup during the demolition phase of
construction.
Collect site trash daily, especially during rainy and windy conditions.
Remove this solid waste promptly since erosion and sediment control devices tend to
collect litter.
Make sure that toxic liquid wastes (used oils, solvents, and paints) and chemicals (acids,
pesticides, additives, curing compoundF) are not disposed of in dumpsters designated for
construction debris.
Do not hose out dumpsters on the construction site. Leave dumpster cleaning to the trash
hauling contractor.
Arrange for regular waste collection before containers overflow
Clean up immediately if a container does spill.
Make sure that construction waste is collected, removed, and disposed of only at authorized
disposal areas.
Collection, Storage, and Disposal
Littering on the project site should be prohibited.
To prevent clogging of the storm drainage system, litter and debris removal from drainage
rates trash racks and ditch lines should be a priority.
9 � P Y
Trash receptacles should be provided in the contractor's yard, field trailer areas, and at
locations where workers congregate for lunch and break periods.
Litter from work areas within the construction limits of the project site should be collected
and laced in watertight dumpsters at least weekly, regardless of whether the litter was
generated by he contractor, the public, or others. Collected litter and debris should not be
placed in or next to drain inlets, stormwater drainage systems, or watercourses.
Dumpsters of sufficient size and number should be provided to contain the solid waste
generated by the project.
Full dumpsters should be removed from the project site and the contents should be disposed
of by the trash hauling contractor.
Construction debris and waste should be removed from the site biweekly or more frequently
as needed.
Construction material visible to the public should be stored or stacked in an orderly manner.
Stormwater runon should be prevented from contacting stored solid waste through the use
of berms, dikes, or other temporary diversion structures or through the use of measures to
elevate waste from site surfaces.
Solid waste storage areas should be located at least 50 ft from drainage facilities and
watercourses and should not be located in areas prone to flooding or ponding.
:re;;ecfon a,id tllc�ntenance.
Inspect and verify that activity -based BMPs are in place prior to the commencement of
associated activities. While activities associated with the BMP are under way, inspect weekly
to verify continued BMP implementation.
Inspect BMPs subject to non - stormwater discharge doily while non - stormwater discharges
occur
Inspect construction waste area regularly.
Arrange for regular waste collection.
Tho following steps will help reduce stormwater pollution from concrete wastes:
Discuss the concrete management techniques described in this BMP (such as handling of
concrete waste and washout) with the ready -mix concrete supplier before any deliveries are
made.
Incorporate requirements for concrete waste management into material supplier and
subcontractor agreements.
Store dry and wet materials under cover, away from drainage areas.
Avoid mixing excess amounts of fresh concrete.
Perform washout of concrete trucks offsite or in designated areas only.
Do not wash out concrete trucks into storm drains, open ditches, streets, or streams.
Do not allow excess concrete to be dumped onsite, except in designated areas.
For onsite washout:
- Locate washout area at least 50 feet from storm drains, open ditches, or
water bodies.
- Do not allow runoff from this area by constructing a temporary pit or
bermed area large enough for liquid and solid waste.
- Wash out wastes into the temporary pit where the concrete can set,
be broken up, and then disposed properly.
- Avoid creating runoff by draining water to a bermed or level area when
washing concrete to remove fine particles and expose the aggregate.
- Do not wash sweepings from exposed aggregate concrete into the street
or storm drain. Collect and return sweepings to aggregate base stockpile
or dispose in the trash.
-_E VATERl1IC 1 ",D PUMPIf;C OPERATIONS
Description and Purpose
Dewatering operations are practices that manage the discharge
of pollutants when non - stormwater and accumulated precipitation
h construction
must be removed from a work location so that work
may be accomplished.
Suitable Applications
These practices are implemented for discharges of nonstormwater
from construction sites. Non - stormwaters include, but are not
limited to, groundwater, water from cofferdams, water diversions,
and waters used during construction activities that must be
removed from a work area. Practices identified in this section
are also appropriate for implementation when managing the
removal of accumulated precipitation(stormwater) from depressed
areas at a construction site.
Limitations
Site conditions will dictate design and use of dewatering
operations. The controls discussed in this best management
practice (BMP) address sediment only. The controls detailed in
this BMP only allow for minimal settling time for sediment
particles. Use only when site conditions restrict the use of the
other control methods. Dewatering operations will require, and
must comply with, applicable local permits.
Implementation
Dewatering discharges must not cause erosion at the discharge
point. A variety of methods can be used to treat water during
dewatering operations. Several devices are presented below and
provide options to achieve sediment removal. The size of
particles present in the sediment and Permit or receiving water
limitations on sediment are key considerations for selecting
sediment treatment option(s); in some cases, the use of multiple
devices may be appropriate.
Sediment Basin
(iE`CCP' )']:
A sediment basin is a temporary basin with a controlled release
structure that is formed by excavation or construction of an
embankment to detain sediment -laden runoff and allow sediment to
settle out before discharging. Sediment basins are generally larger than
Sediment Traps.
Effective for the removal of gravel, sand, silt, some metals that settle
out with the sediment, and trash.
lv)vle -r;er tat ;n.
Excavation and construction of related facilities is required.
Gravity Ban Filter
l.f;Ci rli