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HomeMy WebLinkAbout07040021.11STORMWATER POLLUTION PREVENTION PLAN INDEX Al Plan Index provided below A2 11 "07" Plat denoting lot numbers, boundaries and streets is provided separately. A3 Project Type: Construction of 1.25± Ac. commercial site. A4 Vicinity Map: Denoted on Sheet C100 A5 Legal Description of Project Site: See below: Part of Block 11 in the Conditional Secondary Plat Carmel Science and in Hamilton Count Indiana the lot of Technology Pork, a subdivision a y, p which is recorded in XXXXX in the Office of the Recorder of Hamilton County, Indiana, described as follows: Lot 3 as shown on the proposed Secondary Plat filed under Docket # 06100006 TAC and containing 1.239 acres, more or less. LATITUDE: 39'57'53" LONGITUDE: 86'08'35" A6 Location of all lots and proposed site improvements: See sheet C101 to C102. A7 14 Digit Hydrologic Unit Code: 05120201090040 Federal w r A8 State or ate alit quality None. p A9 Specific points where stormwater discharge will leave the site: All storm water from the developed site will enter manhole 603, which drains to the existing east retention pond, see Site Development Plan Sheet C101 for more detail. A10 Location of all wetlands, lakes & water courses on and adjacent to site: None All Receiving Waters: WR Fertig Regulated Drain - Carmel Creek - White River Al2 Identification of potential discharges to groundwater. None. A13 100 Year Floodplains, Floodways and Flood Fringes: None per FIRM Map #18057(:0209F Dated February 19, 2003 A14 Pre - Construction and Post Construction Peak Discharge to Ex. Detention Pond: 10 year Pre - Developed Peak Discharge = 1.58 CFS 10 year Post - Construction Peak Discharge = 6.22 CFS A15 Adjacent Land Use (See Stormwater Pollution Prevention Plan Sheet C103 for more information): North: Carmel Drive South: Townhomes /Apartments East: Existing detention pond, vacant commercial lot West: Commercial, 122nd Street A16 Locations and approximate boundaries of all disturbed areas: See Sheet C103 for locations. A17 Identification of existing vegetative cover. See Stormwater Pollution Prevention Plan Sheet C103. A18 Soils Map including descriptions and limitations: See sheet C804 for soils map, descriptions and limitations. A19 Locations, size and dimensions of proposed stormwater systems: See Site Development Plan Sheet C102 for proposed storm sewer system. A20 Locations, size and dimensions of any proposed off -site construction activities associated with this project: See Site Development Plan Sheet C102. A21 Locations of Soil Stockpiles: See Stormwater Pollution Prevention Plan Sheets C103 -104 for soil stockpile location(s). A22 Existing site topography. Sheet C102. A23 Proposed final topography. See Site Development Plan Sheet C102 for proposed site grading and drainage patterns. B1 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. UZ Sequencing of stormwater quality implementation relative to land disturbance activities: This plan has been created in an effort to eliminate sediment from leaving the project site during construction protecting the adjoining properties and the Carmel Creek - White River. The existing watershed sheet drains into an existing pond along the east boundary of the project site. PRECONSTRUCTION ACTIVITIES: 1. Call the Indiana Underground Plant Protection systems, Inc. ( "Holey Moley ") 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. Contact Hamilton County Surveyors office 48 hours prior to start of work to schedule a pre- construction meeting. 3. A silt fence shall be installed at the edges of the project site where there is potential for any stormwater runoff and between the project site and the existing pond to the east. Potential areas are identified based on existing topography along the perimeters of the site. Silt fence shall be in place prior to construction to protect the existing pond east of the project site from receiving sediment runoff. 4. Evaluate existing vegetation suitable for use as filter strips along the project boundaries. 5. A construction entrance shall be placed per the plan location. 6. Install protective devices along the existing storm sewer inlet per the location shown on the Stormwater Pollution Prevention Plan Sheet C103. 7. Establish construction staging area for equipment and vehicles as far from detention ponds and swales as possible. 8. Establish onsite location for owner /operator /contractor placement of approved plans and Rule 5 NOI and Rule 5 inspection documentation. CONSTRUC11ON 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. Strip topsoil and temporarily stockpile in location provided on the Stormwater Pollution Prevention Plan Sheet C103. 3. Perform rough grading. 4. Upon completion of rough grading, install sanitary lateral, storm sewers, and water lateral. As storm sewers are constructed, install inlet protection measures. Liming of paved areas should be done prior to the installation of storm sewers to prevent the transmission of lime dust to ponds or receiving water. 5. Upon completion of sanitary, storm and water construction and inlet protection, fine grade all areas and install all seeding. 6. Construct entrances, parking lot, sidewalks, and paths. 7. Install curb inlet sediment barriers once pavement and curbs are in place. 8. Upon completion of site construction, repair unstablized areas with permanent seeding. B3 Stable construction entrance location(s) and specifications. See Stormwater Pollution Prevention Plan Sheet C103 for location and Sheets C803 -C804 for construction entrance details and specifications. r Stormwater Pollution B4 Sediment control measures for sheet flow areas: See Prevention Plan Sheets C103 -C104 for locations of sediment control measures and Sheets C803 -C804 for i it and specifications. construction details a p B5 Sediment control measures for concentrated flow areas: See Stormwater Pollution Prevention Plan Sheets C103 -C104 for locations of sediment control measures and Sheets C803 -C804 construction details and specifications. B6 Storm sewer inlet protection measures, locations and specifications: See Stormwater Pollution Prevention Plan Sheet 0104 for locations of inlet protection measures and Sheets C803 -C804 construction details and specifications. B7 Runoff control measures: See Stormwater Pollution Prevention Plan Sheets C103 -C104 for locations of runoff control measures and Sheets C803 -C804 for construction details and specifications. B8 S tormwater outlet protection specifications: See Storm w ate r Pollution Pr vention Plan Sheets C103 -C104 for locations of stormwater outlet control measures and Sheets C803 -C804 for construction details and specifications. B9 Grade stabilization structure locations and specifications: See Stormwater Pollution Prevention Plan Sheets C103 -C104 for locations of grade stabilization control measures and Sheets C803 -C804 for construction details and specifications. 810 Location, dimensions, specifications and construction details of each stormwater quality measure: See Stormwater Pollution Prevention Plan Sheets C103 -C104 for locations of various stormwater quality measures and Sheets C803 -C804 for construction details and specifications. Bill. Temporary surface stabilization methods appropriate for each season: See Stormwater Pollution Prevention Plan Sheets C103 -C104 for locations of temporary surface stabilization measures and Sheets C803 -C804 for construction details and specifications. B12 Permanent surface stabilization specifications: See Stormwater Pollution Prevention Plan Sheets C103 -C104 for locations of permanent surface stabilization measures and Sheets C803 -CB04 for construction details and specifications. B13 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, point, 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. Discharge: 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 AND groundwater contamination. The facility does have city sanitary sewer and city water. Prediction of Potential Spills: 1. Nearest Navigable Water. Carmel Creek - White River 2. Drainage System: All storm drainage leaves the drive by storm sewer and is conveyed to an existing detention pond to the east. The existing detention pond discharges to the SW under Guilford Road and into Carmel Creek. 3. Possible Spill Sources (During and post construction): Vehicular sources such as leaking fuel or oil, broke 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 f ac ili ty maintains NO abo v e g r ou n d o r under ground sto r age tanks at this site. Therefore, it is felt that there is little or no possibility of post construction groundwater contoiminotion. 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 local Fire Department Phone: 9 -1 -1 d.) Notify the local 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 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. 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. B14 Monitoring and maintenance guidelines for pollution prevention measures: 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. 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. 6. Carmel Drive shall be monitored throughout the day to ensure mud or sediment is not being tracked off of the project. Dandy Curb Sack Inlet Protection Maintenance Requirements 1. Remove all sediment and debris from the surface and vicinity of the unit after each storm event. 2. After storm event and at regular intervals, look into the Dandy Bag. If the containment area is more than .� full of sediment, the unit must be emptied. 3. To empty unit, simply lift the unit out of the inlet using the lifting straps and remove the grate. 4. If using optional oil obsorbonts, replace absorbant pillow when near saturation. B15 Erosion & sediment control specifications for individual building lots: Not applicable. See Sheets C803 & C804 for Construction details and specifications for erosion & sediment control on this site. L1 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. QZ Sequence describing stormwoter quality measure implementation: 1. Place protection on all existing inlets as shown on C103 prior to any land disturbance. 2. Install silt fence along: all edges of the project site as shown on sheet C103. 3. Install Temporary Construction Entrance in proposed location as shown on C103. 4. Once new inlets are constructed, inlet protection measures shall be installed immediately. 5. 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. 6. Remove all individual inlet protection and 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 waterway or storm sewer system. 7. Post construction stormwater quality is provided in part by the existing offsite Regional Detention Ponds and the existing AquoSwirl AS -6 downstream of the site prior to entering the pond. 8. Inspection and maintenance of all project site areas and infrastructure improvements is the responsibility of the owner /developer or his designee until improvements are accepted for maintenance by the owner. The contractor shall be responsible for restoring to existing conditions any work required offsite or within platted easements. C3 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. i into the r in contaminated stormwater runoff before discharging t 3. And if needed teat co to . 9 storm sewer system or receiving waters. Typical stormwater quality measures for reducing, eliminating or controlling pollutants (source controls) include: a. Detention devices - Offsite to the east, W.R. Fertig Regional Detention Ponds located within Carmel Science and Tecnology Park b. Reducing Runoff or Direct runoff from impervious areas - existing Swale along south property line c. Vegetated strips and /or swales - along the perimeter of the site, vegetated strips shall remain as landscaped and lawn areas. d. Permanent erosion control seeding and plantings - See C104 for more info. e. Outlet protection & velocity dissipation devices - riprop at pipe outfoll location f. Existing AquoSwirl model AS -6 ICED will treat the runoff as it exits the site and before it enters the detention pond. i It is the intent of this plan that the implementation of the above described sto rm 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 -C104 for locations of permanent stormwater quality measures and Sheets C803 -C804 for construction details and specifications. C5 Description of maintenance guidelines for proposed water quality measures: 1. Storm structures - inlets shall be inspected semi - anually to ensure proper function. Any debris found clogging the grate shall be removed. Debris or sediment buildup within any structure shall be removed. ADDITIONAL STORMWATER POLLUTION PREVENTION MEASURES HICLE & EQUIPMENT MAINTENAN Descriation 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. Limitations Onsite vehicle and equipment maintenance should only be used where it is impractical to send vehicles es a nd equipment offsite for maintenance tenance 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). 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 an 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 hove spill kits and /or use other spill protection devices. Use adsorbent materials 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 covers for these materials if stored onsite. Train employees 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, 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 in 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 vehicles) or equipment should be removed from the project site. Inspect equipment for damaged hoses and leaky gaskets routinely. Repair or replace as needed. VEHICLE AND EQUIPMENT FUELING Description and Purpose Vehicle equipment fueling procedures and practices are designed to prevent fuel spills and leaks, 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. Implementation Use offsite fueling stations as much as possible. These businesses are better equipped to handle fuel and spills properly. Performing this work offsite can also be economical by eliminating the need for a separate fueling area at a site. Discourage "topping -off" of fuel tanks. A bso rbent spill cleanup m ate I s and spill kits should be available in fueling areas and on fueling trucks, and should be disposed of properly after use. Drip pans or absorbent pads should be used during vehicle and equipment fueling, unless the fueling 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. Avoid mobile fueling of mobile construction equipment around the site; rather, transport the equipment to designated fueling areas. Train employees and subcontractors in proper fueling and cleanup procedures. Dedicated fueling areas should be protected from stormwater runon and runoff, and should be located at least 50 ft away from downstream drainage facilities and watercourses. Fueling must be performed on level -grade areas. Protect fueling areas with berms and dikes to prevent runon, runoff, and to contain spills. Nozzles used in vehicle and equipment fueling should be equipped with an automatic shut to control drips. Fueling operations should not be left unattended. Federal, state, and local requirements should be observed for any stationary above ground storage tanks. Inspection 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 materials. SOLID WASTE MANAGEMENT Description and Purpose 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 waste collection areas and containers, arranging for regular disposal, and training employees and subcontractors. Suitable Applications 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 structures (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 bags, plastic wrappers, and cigarettes Construction wastes including brick, mortar, timber, steel and metal scraps, pipe and electrical cuttings, nonhazardous equipment parts, styrofoam and other materials send transport and package construction rraterials Implementation 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 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. Inspection and Maintenance 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 daily while non - stormwater discharges occur Inspect construction waste area regularly. Arronge for regular waste collection. CONCRETE WASHOUT 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. q - Wash out wastes into the temporary p it where the concrete ca n set, be broken u P. and then disposed properly. - Avoid creating runoff by draining water to a bermed or level ar ea 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. DEWATERING AND PUMPING OPERATIONS 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 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 g e 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 g sediment treatment option(s); in some cases, the use of multiple devices may be appropriate. Gravity Bag Filter Description: A gravity bag filter, also referred to as a dewatering bag, is a square or rectangular bag made of non -woven geotextile fabric that collects sand, silt, and fines. Appropriate Applications: PP Effective for the removal of sediments (gravel, sand, and silt). Some metals are removed with the sediment. Implementation: Water is pumped into one side of the bag and seeps through the bottom and sides of the bag. 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 sediments that escape the bag. Maintenance: Inspection of the flow conditions, bag condition, bag capacity, and the secondary barrier is required. Replace the bag when it no longer filters sediment or passes water at a reasonable rate.The bag is disposed of offsite. 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: Name of Trained Individual: Is this Evaluation followina a rainfall Yes Date of Inspection: No If ves, date the rain stoDDed: InOhPs No. PROBLEM or CONCERN YES NO N/A 1. Is the site information posted at the entrance? I a P STORMWATER POLLUTION 2. Are all necessary permits attained and special provisions being implemented? R: \1 21 1 \034 \DWGS \C803.DWG SHEET NO.: (Co"(93 3. Is a construction entrance installed? Is it effective? Is it enough CC W 4. Public nd private streets are clean? c 0 Co 5. Are appropriate practices installed where stormwater leaves the site? JZ 6. Silt fence Is entrenched Into the round. C C> U > 7. Silt fence is upright? Fabric and stakes meet specifications? Fabric is not to torn. o= w oc Terminated to higher round? Property 'oined at ends? M 0 0 U 8. Sediment basins and traps are installed according to the Ian? The pipe or rock spillway is functional? z r` &i-_ z 9. The earthwork for erosion and sediment control practices is properly graded, seeded and /or mulched? W r--i ''7 ) U5 i_ >m w 10. Diversions swales and/or waterbars are installed to plan and protected? (if __: 11. Perimeter practices have adequate capacity and do not need to be cleaned out? U U 12. Inlet protection is installed on all functional inlets? not filter fabric under rate r-r 13. 1 Inlet protection is installed so water does not flow under it? 14. 1 The fra m e, cross-bracing and/or sta k es a r e adequate and m eet specifications? 15. The fabric, straw, mulch and/or stone is intact without holes or tears? 1 6 Catc h basin Insert protection Is Install ed where required? 17. Sediment has been removed from the roctice? 18. Swales and ditches have been stabilized or protected? 19. Stormwater outlets are adequately stabilized? 20. 1 Temporary stabilization of distributed ground has been addressed? 2 1. is urbed areas that well Ile dormant for 1 re tanned to be protected? D 5 days a Disturbed 22. All protected dormant areas meet a minimum 70% coverage 23. Growing vegetation has sufficient water and/or nutrients to row? 24. Permanent stabilization of disturbed ground is progressing through the project? 25. I 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 Limping operations have a protected outlet and discharge water is clear? 29. A designated washout is established for concrete trucks? 30. A dum ster is onsite for trash disposal? 31. Fuel tanks and other toxic materials are safely stored and protected? 32. Smaller construction sites not required to file a separate NOI are complying with the overall Ian? 33. 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: Contractor Representative contacted, name and date: Report Submitted by. Date: Date: ,..\ \ \ \ \\ \OAll IIIT►111,17,, //. IN r � o F No. 10000075 STATE OF �` �� ��• . /. DIANP / 1111111111111 3&4� - �,...1.. DATE: 05/01 /07 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. (2007) 11 I Schneider THE SCHNEIDER CORPORATION 12821 E. New Market Street Suite 301 Carmel, IN 46032 Telephone: 31 7.569.8112 Fax: 31 7.826.6410 www.schneidercorp.com Architecture Civil Engineering Environmental Engineering Geotechnical Services GIS * LIS Home Builder Services Interior Design Land Surveying Landscape Architecture Transportation Engineering 1-1c4� Z 1211.034 DRAWN BY 0 BET I a P STORMWATER POLLUTION Z 0 R: \1 21 1 \034 \DWGS \C803.DWG SHEET NO.: (Co"(93 Z CC W Iiii- - ('' 0 Co 04 ls::i V JZ Z w ao C C> U > M Q o= w oc o M 0 0 U w a z r` &i-_ z 0 Z z O W r--i ''7 ) U5 i_ >m w (if __: ,..\ \ \ \ \\ \OAll IIIT►111,17,, //. IN r � o F No. 10000075 STATE OF �` �� ��• . /. DIANP / 1111111111111 3&4� - �,...1.. DATE: 05/01 /07 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. (2007) 11 I Schneider THE SCHNEIDER CORPORATION 12821 E. New Market Street Suite 301 Carmel, IN 46032 Telephone: 31 7.569.8112 Fax: 31 7.826.6410 www.schneidercorp.com Architecture Civil Engineering Environmental Engineering Geotechnical Services GIS * LIS Home Builder Services Interior Design Land Surveying Landscape Architecture Transportation Engineering DATE: 1-1c4� 05/01/07 1211.034 DRAWN BY CHECKED BY: BET SHEET TITLE: STORMWATER POLLUTION PREVENTION DETAILS &NOTES CV R: \1 21 1 \034 \DWGS \C803.DWG SHEET NO.: (Co"(93 Q -I �4 - ('' 04 ls::i V l W M CD z Zo z H� r2l PI1 I C J W r--i ''7 ) W W U U r--1 C) r-r (� r--I F_ - Q) ? rpp''�� r_q (V DATE: PROJECT NO.: 05/01/07 1211.034 DRAWN BY CHECKED BY: BET SHEET TITLE: STORMWATER POLLUTION PREVENTION DETAILS &NOTES DRAWING FILES: R: \1 21 1 \034 \DWGS \C803.DWG SHEET NO.: (Co"(93