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HomeMy WebLinkAbout05030006.69STORMWATER POLLUTION PREVENTION PLAN INDEX Plan Index provided below 11 °x17" Plat denoting lot numbers, boundaries and streets is provided separately. Project Type: Pinckney Drive at Vicinity Map: Denoted on Sheet C100 _ Legal Description of Project Site: See attached Secondary Plat and NOI Letter. Location of all lots and proposed site improvements: See Development Plan Sheet C101. _ 14 Digit Hydrologic Unit Code: 05120201090060 & 05120201120080 _ State or Federal water quality permits: None _ Specific points where stormwater discharge will leave the site: The storm sewers are routed through one of two detention ponds prior to discharging into either the JW Brendle Drain or the existing pond in Section 5002 of the Village of WestClay which discharges into Elliot Creek. See Site Development Plan Sheet C101 for more detail. _ Location of all wetlands, lakes & water courses on and adjacent to :;rte: The JW Brendle Drain is located west of the site. See Site Development Plan Sheet C101 for more detail. _ Receiving Waters: JW Brendle Drain & Elliot Creek _ Identification of potential discharges to groundwater: none. 100 Year Floodploins, Floodways and Flood Fringes: none. Pre- Construction and Post Construction Peak Discharge: _ 10 year Pre - Construction Peak Discharge = See previously submitted Village of WestClay Section 6001 Pre - Construction Stormwater Pollution Prevention Plan. 10 year Post Construction Peak Discharge = See previously submitted Village of WestClay Section 6001 Pre - Construction Stormwater Pollution Prevention Plan. Adjacent Land Use: North: Agricultural & 131st Street South: Residential Townhomes - Village of WestClay Section 8001 East: Commercial - Village of WestClay Future Section 6003 West: Commercial - Village of WestClay Future Section 6003 _ Locations and approximate boundaries of all disturbed areas: See Sheets C103 -C104 for locations. _ Identification of existing vegetative cover: See Stormwater Pollution Prevention Plan - Sheets C102, Soils Map including descriptions and limitations: See sheet C805 for soils map, description and limitations. _ Locations, size and dimensions of proposed stormwater systems: See Site Development Plan 11 Sheet C101 for proposed storm sewer system. A Locations, size and dimensions of any proposed off -site construction activities associated with this project: None. 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. A Existing site topography. See Site Development Plan Sheet C101 for existing site topography. Proposed final topography. See Site Development Plan Sheet C101 site grading and drainage P atterns. l ±' 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. B Sequencing of stormwater quality implementation relative to land disturbance activities: This plan has been created in an effort to eliminate sediment from leaving the Village of WestClay Pinckney Drive project during construction protecting the adjoining properties, the JW Brendle Drain and Elliot Creek. The Pre - Construction Stormwater Pollution Plan and Pre - Construction Sequencing for the Village of WestClay Pinckney Drive project were previously submitted with the Village of WestClay Section 6001. See Village of WestClay Section 6001 Plans Sheets C107 -C109 regarding Pre - Construction Stormwater Prevention Pollution and Sheet C804 regarding Pre - Construction Sequencing; all items must be completed prior to the start of the construction activities listed below. The Temporary Sediment Basin(s) must be constructed prior to any earthmoving. It shall remain in place until final grading of the associated area commences. 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 bank, 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. ti Stable construction entrance locations) and specifications: See Stormwater Pollution Prevention Plan Sheet C102 for location and Sheet C805 for construction entrance details and specifications. B+ Sediment control measures for sheet flow areas: See Stormwater Pollution Prevention Plan Sheet C102 for locations of sediment control measures and Sheet C805 for construction details and specifications. 13� Sediment control measures for concentrated flow areas: See Stormwater Pollution Prevention Plan Sheet C102 for locations of sediment control measures and Sheet C805 for construction details and specifications. _ Storm sewer inlet protection measures, locations and specifications: See Stormwater Pollution Prevention Plan Sheet C102 for locations of inlet protection measures and Sheet C805 for construction details and specifications. H - Runoff control measures: See Stormwater Pollution Prevention Plan Sheet C102 for locations of runoff control measures and Sheet C805 for construction details and specifications. 3d Stormwater outlet protection specifications: See Stormwater Pollution Prevention Plan Sheet C102 for locations of stormwater outlet control measures and Sheet C805 for construction details and specifications. _ Grade stabilization structure locations and specifications: See Stormwater Pollution Prevention Plan Sheet C102 for locations of grade stabilization control measures and Sheet C805 for construction details and specifications. s1:; Location, dimensions, specifications and construction details of each stormwater quality measure: See Stormwater Pollution Prevention Plan Sheets C103 -L'104 for locations of various stormwater quality measures and Sheet C805 for construction details and specifications. HI` Temporary surface stabilization methods appropriate for each season: See Stormwater Pollution Prevention Plan Sheet C102 for locations of temporary surface stabilization measures and Sheet C805 for construction details and specifications. J I1 Permanent surface stabilization specifications: See Stormwater Pollution Prevention Plan Sheet C102 for locations of permanent surface stabilization measures and Sheet C805 for construction details and specifications. 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 he 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. i h r : 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, an lake, or sea. [Note: This definition is usually interpreted to me 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 Spills: 1. Nearest Navigable Water: JW Brendle Drain & 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. b.) Notify the Indiana Department of Environmental Management, Office of Emergency Response by calling the appropriate telephone number: Office 317- 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 oddition, a continually updated list of available absorbent materials and cleon -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. They 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. - - Monitoring and maintenance guidelines for pollution prevention measures: Straw Bole 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 its 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 islet Protection Maintenance Requirements 1. After each storm event remove the sediment and replace the gravel, replace the geotextle 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 contributir;g drainage area has been stabilized, remove the gravel, wire mesh, geotextle fabric and sediment deposits and dispose of them p:opedy. 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 oreo(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. - Erosion & sediment control specifications for individual building lots: See Sheet C805 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. Sequence describing stormwater quality measure implementation: 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 vegetative growth has been established 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 accepted for maintenance by homeowners association or local agencies. E. Inspection and maintenance of individual lots is the responsibility of the home builder or his designee until the homeowner buys and thereby accepts responsibility for the individual lot. = Description of proposed post construction stormwater quality measures: Site and facility design for stormwater quality protection on this site employs a multi -level strategy consisting 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 an 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 sods 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. Location, dimensions, specifications and construction details of stormwater quality measures: See Stormwater Pollution Prevention Plan Sheet C102 for locations of permanent stormwater quality measures and Sheet C805 construction details and specifications. - Description of maintenance guidelines for proposed water quality measures: See attached BMP Operations and Maintenance Manual. ADDITIONAL STORMWATER POLLUTION PREVENTION MEASURES VEHICLE & FOUIPMENT MAINTENANCE riction and P Prevent or reduce the cantomination 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 on onsite yard area is necessary for storage and maintenance of heavy equipment and vehicles. Limitations 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 can contaminate stormwater include engine repair and service, changing or replacement of fluids, and outdoor equipment storage and parking (engine fluid leaks). Implementotion 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 pcds should be used during vehicle and equipment maintenance work that involves fluids, finless the maintenance work is performed over an impermeable surface in a dedicated maintenance area. Place a stocKpl e of spill cleanup materials where it will be readily accessible All fueling trucKS and fueiing areas are required to have spill kits and /or use other spill protection deuces. Use adsorben' materials an small spills. Remove the absorbent materials promptly and dispose of properly. aspect onsite vehicles and equipment daily at startup for leaks, and repair immediately. Keep vehices 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 covers for these materials if stored onsite. Train e- p,oyees and subcontractors in proper maintenance and spill cleanup procedures. Drip pans or plastic sheeting should be placed under all vehicles and equipment placed on docks, b: "ges, or other structures over water bodies when the vehicle or equipment is planned tc be idle for more than 1 hour. Proper, dispose of used oils, fluids, lubricants, and spill cleanup materials. Do not place used of , a dumpster or pour into a storm drain or watercourse. Proper, dispose of or •ecycle used batteries. Do -c' used tires Repair 'eaKs 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 ossociotec with the BMP are under way, inspect weekly to verify continued BMP implementation. Keep ample supple_ of spill cleanup materials onsite. Maintain waste fluid containers in leak proof condition. Vehicles and equ'pTen' 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 equipmei ;or damaged hoses and leaky gaskets routinely. Repair or replace as needed. - -L I1.`, Description and Purpose Vehicle equ pment fueling procedures and practices are designed to prevent fuel spills and leaks, drd -edu:e or eliminate contamination of stormwater. This can be accomplished by using offsite `ocilities, fueling in designated areas only, enclosing or covering stored fuel, implemerr spill controls, and training employees and subcontractors in proper fueling procedures. Limitations Onsite veh c.e 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. Implemertct -or. Use offs`.e f,el ;ng stations as much as possible. These businesses are better equipped to handle `.e and spills properly. Performing this work offsite can also be economical by eliminot rg the need for a separate fueling area at a site. Discourcge "topping -off" of fuel tanks. Absorber, spill cleanup materials and spill kits should be available in fueling areas and on fueir,g trucks, and should be disposed of properly after use. Drip pcos or absorbent pads should be used during vehicle and equipment fueling, unless the `uding is 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. void mobile 'uel' ng o f mobile construction equipment around the site; rather, transport tre equipment to designated fueling areas. '•air employees and subcontractors in proper fueling and cleanup procedures. -edicated h.,eling areas should be protected from stormwater runon and runoff, and should be ccated at east 50 ft away from downstream drainage facilities and watercourses. Fueling -ust be performed on level -grode areas. Protect ^„eeng areas with berms and dikes to prevent runon, runoff, and to contain spills Nozzles ,see in vehicle and equipment fueling should be equipped with an automatic shutoff :o contra d "bs. Fueling operations should not be left unattended. �-ederal, stcte, and local requirements should be observed for any stationary above ground storage tanks. nspectior and Maintenance ,ehicles arc equipment should be inspected each day of use for leaks. Leaks should be � )aired immediately or problem vehicles or equipment should be removed from the project site Kee; ample supplies of spill cleanup materials onsite. - mediotely dean up spills and properly dispose of contaminated soil and cleanup - otei ription and Pur Solid waste management procedures and practices are designed to prevent or reduce the discharge c` pollutants to stormwater from solid or construction waste by providing designated waste collection areas and containers, arranging for regular disposal, and training employees Td subcontractors. Suitable Apa cations This BMP is suitable for construction sites where the following wastes are generated or stored: Solid waste generated from trees and shrubs removed during land clearing, demolition of existing st -. pores (rubble), and building construction Packaging - aterials including wood, paper, and plastic Scrap or s..rvlus building materials including scrap metals, rubber, plastic, glass pieces and mosonr. .'�,,CtS Domes' : wastes including food containers such as beverage cans, coffee cups, paper bags, p,cs' c wrappers, and cigarettes Constructia .astes including brick, mortar, timber, steel and metal scraps, pipe and electrical :,.tangs, nonhazardous equipment parts, styrofoom and other materials send transport are package construction materials Implementation The following steps will help keep a clean site and reduce stormwater pollution: Select designated waste collection areas onsite. Inform trash - houling 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 compounds) 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 grates, trash racks, and ditch lines should be a priority. 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. 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 - stormwoter discharge daily while non - stormwater discharges occur Inspect construction waste area regularly Arrange for regular waste collection The 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. C ;.���R��r� =11�� �U�1�1`JG GF_R= C1 .S Description and Purpose Dewatering operations are practices that manage the discharge of pollutants when non - stormwater and accumulated precipitation must be removed from a work location so that construction work may be accomplished. Suitable Applications n These practices are implemented for discharges of no sto rmwoter 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 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. Excavation and construction of related facilities is required. Gravity Bag Filter A gravity bag filter, also referred to as a dewatering bag, is a square or rectangular bag made of non -woven geotextile fabric that k.ollects sand, silt, and fines. Effective for the removal of sediments (gravel, sand, and silt). Some metals are removed with the sediment. Water is pumped into one side of the bag and seeps through the bottom and sides of the bag. Temporary sediment basins must be fenced if safety is a concern. A secondary barrier, such as a rock filter bed or straw /hay bale barrier, is placed beneath and beyond the edges of the bag to capture Outlet protection is required to prevent erosion at the outfall location. sediments that escape the bag. Inspection of the flow conditions, bog condition, bag capacity, and the Maintenance Is required for safety fencing, vegetation, embankment, Inlet p g y secondary barrier is required. nd outfall structures, as well as other features. Removal of sediment is required when the storage volume is educed by one -half. Sediment Trap A sediment trap is a temporary basin formed by excavation and /or construction of an earthen embankment across a waterway or low drainage area to detain sediment -laden runoff and allow sediment to settle out before discharging. Sediment traps are generally smaller than Sediment Basins. Effective for the removal of large and medium sized particles (sand and gravel) and some metals that settle out with the sediment. Excavation and construction of related facilities is required. Trap inlets should be located to maximize the travel distance to the trap outlet. Use rock or vegetation to protect the trap outlets against erosion. Maintenance is required for vegetation, embankment, inlet and outfall structures, as well as other features. Removal of sediment is required when the storage volume is reduced by one - third. Replace the bag when it no longer filters sediment or passes water at a reasonable rate.The bag is disposed of offsite. dill z O w cof 11 11 ;9z��_G \ \ \ \ \ \ 111111 I I I I I I I I l l / / / / / / /// ON T. 8��.,,��� \STER Fo F No. _� 10000075 = � STATE OF �` OX � � %,����`S, INDIAN? 'G, /o /;S�ONAL ��. \ °�• /// / / / /11111 I I 1 11111\\\\ \ \\ 31� -1 L., DATE: 3/1/05 THIS DRAWING AND THE IDEAS, DESIGNS AND CONCEPTS CONTAINED HEREIN ARE THE EXCLUSIVE INTELLECTUAL PROPERTY OF THE SCHNEIDER CORPORATION, AND ARE NOT TO BE USED OR REPRODUCED, IN WHOLE OR IN PART, WITHOUT THE WRITTEN CONSENT OF THE SCHNEIDER CORPORATION. © COPYRIGHTED BY THE SCHNEIDER CORP. (2005) 11 I Schneider THE SCHNEIDER CORPORATION 12821 E. New Market Street Suite 100 Carmel, IN 46032 Telephone: 317.569.8112 Fax: 317.826.6410 www.schneidercorp.com Architecture Civil Engineering Environmental Engineering Geotechnical Services GIS * LIS Home Builder Services Interior Design Land Surveying Landscape Architecture Transportation Engineering I��; EVALUATION FOR CONSTRUCTION PROJECTS A trained individual shall perform a written evaluation of the project site. a. By the end of the next business day following each rainfall that exceeds 0.5" b. A minimum of one (1) time per week Project Name: STORMWATER POLLUTION ,Z5 Name of Trained Individual: Date of Inspection: Is this Evaluation following a rainfall Yes No If yes, date the rain stopped: Inches -+--) No. PROBLEM or CONCERN YES NO N/A E- 1. Is the site information posted at the entrance? 2. Are all necessary permits attained and special provisions being implemented? � 3. Is a construction entrance installed? Is it effective? Is it enough Q Z 4. Public and private streets are clean? 5. Are appropriate practices installed where stormwater leaves the site? � 6. Silt fence is entrenched into the round? W �?,- 7. Silt fence is upright? Fabric and stakes meet specifications? Fabric is not to torn? - � Terminated to higher round? Property joined at ends? U 8. Sediment basins and traps are installed according to the Ian? The pipe or rock s illwa is functional? ?=X 9. The earthwork for erosion and sediment control practices is properly graded, seeded and /or mulched? Z 10. Diversions swales and/or waterbars are installed to plan and protected? -� 11. Perimeter practices have ode uate capacity and do not need to be cleaned out? 12. Inlet protection is installed on all functional inlets? not filter fabric under rate 13. 1 Inlet protection is installed so water does not flow under it? r-i 11 14. 1 The frame, cross-bracing and/or stakes are adequate and meetspecifications? 15. 1 The fabric, straw, mulch and/or stone is intact without holes or tears? 16. 1 Catch basin insert protection is installed wher.; required? 17. 1 Sediment has been removed from the roctice? 18. 1 Swales and ditches have been stabilized or protected? 19. Stormwater outlets are adequately stabilized? 20. Temporary stabilization of distributed ground has been addressed? 21. Disturbed areas that will lie dormant for 15 days are planned to be protected? 22. All protected dormant areas meet a minimum 70% coverage 23. Growing vegetation has sufficient water and /or nutrients to grow? 24. Permanent stabilization of disturbed ground is progressing through the project? 25. Final grading and stabilization is progressing on completed areas? 26. The soil has been properly prepared for seeding? 27. Hard or soft armoring is installed where natural vegetation will erode? 28. Water pumping operations have a protected outlet and discharge water is clear? 29. A designated washout is established for concrete trucks? 30. No sediment leaving washout area? 31. A dumpster is onsite for trash disposal? 32. Fuel tanks and other toxic materials are safely stored and protected? 33. Smaller construction sites not required to file a separate NOI are complying with the overall plan? 34. ALL PROBLEMS OR CONCERNS NEED TO BE ADDRESSED WITH A CORRECTIVE ACTION Identify the problem by number and /or provide additional explanation as needed. Developer Representative contacted, name and date: Date: Contractor Representative contacted, name and date: Date: Report Submitted by. Date: dill z O w cof 11 11 ;9z��_G \ \ \ \ \ \ 111111 I I I I I I I I l l / / / / / / /// ON T. 8��.,,��� \STER Fo F No. _� 10000075 = � STATE OF �` OX � � %,����`S, INDIAN? 'G, /o /;S�ONAL ��. \ °�• /// / / / /11111 I I 1 11111\\\\ \ \\ 31� -1 L., DATE: 3/1/05 THIS DRAWING AND THE IDEAS, DESIGNS AND CONCEPTS CONTAINED HEREIN ARE THE EXCLUSIVE INTELLECTUAL PROPERTY OF THE SCHNEIDER CORPORATION, AND ARE NOT TO BE USED OR REPRODUCED, IN WHOLE OR IN PART, WITHOUT THE WRITTEN CONSENT OF THE SCHNEIDER CORPORATION. © COPYRIGHTED BY THE SCHNEIDER CORP. (2005) 11 I Schneider THE SCHNEIDER CORPORATION 12821 E. New Market Street Suite 100 Carmel, IN 46032 Telephone: 317.569.8112 Fax: 317.826.6410 www.schneidercorp.com Architecture Civil Engineering Environmental Engineering Geotechnical Services GIS * LIS Home Builder Services Interior Design Land Surveying Landscape Architecture Transportation Engineering I��; PROJECT 3/1/05 6001 ZJH.� DRAWN BY: CHECKED BY: w o STORMWATER POLLUTION ,Z5 DRAWING FILES: N:\1238\6001\DWGS\PINCKNEY\C804-805.DWG U C (EI35) (a 4 -+--) 1iiiiiiiiiiiiiiiiiiiiiiii!1 E- � W a � Q Z I Q z � e4i O W �?,- 7 W � Ww Q - � �\ U U ?=X Z CZ -� W r-i 11 1 DATE PROJECT 3/1/05 6001 ZJH.� DRAWN BY: CHECKED BY: JLF SHEET TITLE: STORMWATER POLLUTION PREVENTION DETAILS DRAWING FILES: N:\1238\6001\DWGS\PINCKNEY\C804-805.DWG SHEET NO.: C (EI35) (a 4