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HomeMy WebLinkAbout09030013 Private Golf Course - Reed Property Pg 6EROSION CONTROL SCHEDULE EROSION CONTROL MEASURE MAINTENANCE INSTALLATION SEQUENCE STONE ENTRANCE AS NEEDED PRIOR TO CLEARING AND GRADING SILT FENCE WEEKLY, AFTER STORM EVENTS AND AS NEEDED PRIOR TO CLEARING AND GRADING TREE PROTECTION WEEKLY, AFTER STORM EVENTS AND AS NEEDED PRIOR TO CLEARING AND GRADING TEMPORARY DIVERSIONS WEEKLY, AFTER STORM EVENTS AND AS NEEDED ALONG WITH ROUGH GRADING RIP -RAP HORSESHOE WEEKLY, AFTER STORM EVENTS AND AS NEEDED IMMEDIATELY AFTER DETENTION BASIN CONSTRUCTION PERMANENT SEEDING WATER AS NEEDED AFTER FINISH GRADING EROSION CONTROL MATTING WEEKLY, AFTER STORM EVENTS AND AS NEEDED AFTER FINISH GRADING STRAW BALES WEEKLY, AFTER STORM EVENTS AND AS NEEDED AFTER FINISH GRADING SEED, SOD LANDSCAPE AROUND WATER AS NEEDED AFTER FINISHED GRADING AROUND FINISHED UNITS UNITS FINISHED REMOVAL OF STRAW BALES N/A AFTER ALL AREAS DRAINING TO THESE AREAS ARE STABILIZED REMOVAL OF INLET PROTECTION N/A AFTER ALL AREAS DRAINING TO THESE AREAS ARE STABILIZED REMOVAL OF SILT FENCE N/A AFTER ALL AREAS DRAINING TO THESE AREAS ARE STABILIZED REMOVAL OF RIP RAP HORSESHOE N/A AFTER ALL AREAS DRAINING TO THESE AREAS ARE STABILIZED Al REQUIRED PLAN ELEMENTS This sheet is intended to serve as the index of required plan elements. (A2) 11X17 PLAT MAP, An 11x17 plat map will be provided to the City of Carmel with the filed NOT. (A3) PROJECT DESCRIPTION This project is located on the east side of West Street approximately 1/4 mile north of the intersection with West 121st Street. The project lies within the limits of the City of Carmel. The overall site is approximately 34.9 acres; however, the proposed improvements will only be disturbing 8.6 acres. The existing site is currently used as a single family residence with multiple outbuildings and poolhouses. The cover over the 27 acre previously existing site consists mainly of grass with some wooded areas. The proposed improvements will mainly be taking place on newly acquired 7 acres to the south which is covered mainly with residual crops. The proposed improvements will consist of the construction of greens, tee boxes, bunkers and turf for additions to the existing private golf course. A4 VICINITY MAP e vacinity map showing the project location can be seen on sheet CO.O. (A5) LEGAL DESCRIPTION The legal land description can be seen on sheet C1.0. Longitude: W 8614'08" Latitude: N 39'57'54" A6 LOT LOCATION AND SITE IMPROVEMENTS e property boundaries, utility locations, roads, structures and common areas can be seen on the development plan (Sheets C2.0). (A7) HYDROLOGIC UNIT CODE HUC -14: 051 20201 1 20070 (A8) REQUIRED STATE OR FEDERAL WATER QUALITY PERMITS There are no required State or Federal water quality permits for the project site. (A9) STORMWATER DISCHARGE POINTS Stormwater from the site will be collected by swales and then routed via culverts and swales to three existing ponds. All three ponds will interconnect and then discharge into a 15" CMP culvert under West Road. At that point, the drainage heads west into a large ravine that feeds into Boone Creek. (A10) SITE WETLANDS, LAKES AND WATER COURSES There are no wetlands or lakes on or adjacent to the site. (A11) RECEIVING WATERS Stormwater that leaves the site will drain into a large ravine feeding Boone Creek which connects to Eagle Creek. (Al2) POTENTIAL DISCHARGES TO GROUNDWATER There are no sinkholes or uncapped abandoned wells located on the project site or downstream of the project site. 100 YEAR FLOODPLAIN, FLOODWAYS AND FRINGES (A13) This project does not lie within a 100 year floodplain as defined by FEMA on the FIRM maps (Map #18057CO205F). (A14) ESTIMATED PEAK DISCHARGE EXISTING Pre construction: 10 -year run -off 100 -year run -off PROPOSED (AFTER DETENTION) Post construction: 10 -year run -off 100 -year run -off 17.61 cfs 46. 53cfs 7.41 cfs 21, 25cfs These numbers were calculated using an SCS -II hydrogrpah for a 24 -hour storm event. (A15) ADJACENT LANDUSE The existing land uses adjacent to the site are as follows: North: Agricultural /Residential West: Agricultural /Residential South: Agricultural /Residential East: Agricultural /Residential (A16) CONSTRUCTION LIMITS The overall disturbed area is 8.6 acres. The construction limist can be seen on sheet C3.0. (Al]) EXISTING VEGETATIVE COVER The cover over the 27 acre previously existing site consists mainly of well maintained grass with some wooded areas. The newly acquired 7 acres to the south is covered mainly with residual crops. (A18) SOILS MAP Soil maps from the United States Department of Agriculture, Soil Conservation Service, identify Crosby Silt Loam (CrA 47.5% Site) Type "C" Soil, Miami Silt Loam (MmB2 5% Site) Type "B" Soil, and Brookston Silty Clay Loam (Br 47.5% Site) Type "B" Soil. A soils map is included on sheet C0.0 of the construction plans. (A19) PROPOSED STORMWATER SYSTEMS, Locations, size and dimensions of proposed stormwater systems can be found on sheet C2.0. (A20) OFF -SITE CONSTRUCTION PLAN There is no off -site construction planned for this development.. (A21) SOIL STOCKPILE, BORROW AND/OR DISPOSAL The locations of temporary soil stockpiles can be found on sheet C3.0 (non anticipated). (A22) EXISTING TOPOGRAPHY Existing topography can be found on sheets C1.0 C2.0. (A23) PROPOSED TOPOGRAPHY Proposed topography can be found on sheet C2.0. B1 POTENTIAL CONSTRUCTION POLLUTANTS, Potential pollutants sources relative to a construction site may include, but are not limited to material and fuel storage areas, fueling locations, exposed soils and leaking vehicle /equipment. Potential pollutants that may appear at the site due to construction activities include, but are not limited to diesel fuel, gasoline, concrete and concrete washout, solid waste, sediment, paint and solvents, equipment repair products, anti freeze and fertilizer. (B2) STORMWATER QUALITY SEQUENCE STEP 1: POST AT THE ENTRANCE OF THE SITE THE (N01) AND THE CONTACT INFORMATION OF THE PERSON RESPONSIBLE FOR CONSTRUCTION ACTIVITIES. STEP 2: CONTACT (IDEM) AND (City of Carmel 317 571 -2441) 48 HOURS PRIOR TO STARTING CONSTRUCTION. STEP 3: DESIGNATE A PERSON TO BE RESPONSIBLE FOR THE SITE INSPECTIONS AFTER EACH 1/2" RAIN AND A MINIMUM OF ONCE EACH WEEK. STEP 4: INSTALL CONSTRUCTION ENTRANCE. STEP 5: INSTALL SILT FENCE ALONG THE PERIMETER OF THE SITE WHERE NOTED. STEP 6: ROUGH GRADE SITE AND INSTALL TEMPORARY SEEDING IN ALL AREAS TO REMAIN IDLE FOR 15 DAYS OR MORE. STEP 7: MODIFY PONDS WHERE NEEDED. STEP 8: INSTALL SWALE AND CULVERT PROTECTION AS SWALES ARE BEING COMPLETED. STEP 9: INSTALL EROSION CONTROL BLANKET WHERE NOTED. STEP 10: INSTALL REMAINING SUBSURFACE INFRASTRUCTURE. STEP 11: FINAL GRADE SITE. STEP 12: INSTALL LANDSCAPING AND FINAL SEEDING. STEP 13: REMOVE ALL SEDIMENT CONTROL PRACTICES ONCE THE SITE IS STABILIZED. STEP 14: FILE THE NOTICE OF TERMINATION (N.O.T.) WITH IDEM. NOTE: INSTALL TEMPORARY SEEDING AFTER A SPECIFIC STAGE OF CONSTRUCTION HAS BEEN COMPLETED (TEMPORARY OR FINAL) WHERE AREAS WILL BE IDLE OF CONSTRUCTION ACTIVITIES FOR A PERIOD OF 15 DAYS OR MORE. GENERAL NOTES 1. PRIOR TO ANY EARTH DISTURBING ACTIVITY, CONTRACTOR TO SCHEDULE A PRE CONSTRUCTION MEETING WITH THE CITY OF CARMEL. 2. CONTRACTOR SHALL INSTALL ALL REQUIRED SILT FENCES, SILT TRAPS, TREE PROTECTION AND INLET PROTECTION FOR EXISTING INLETS PRIOR TO THE START OF ANY EARTH MOVING OR STRIPPING. 3. CONTRACTOR SHALL INSTALL A STONE CONSTRUCTION ENTRANCE OR SOME OTHER DEVISE PRIOR TO THE START OF EARTHWORK AS NECESSARY TO PREVENT SOIL FROM BEING TRACKED OR WASHED INTO EXISTING ROADWAYS. 4. LAND ALTERATIONS WHICH STRIP THE LAND OF VEGETATION, INCLUDING REGRADING, SHALL BE DONE IN A WAY THAT WILL MINIMIZE EROSION. WHENEVER FEASIBLE, NATURAL VEGETATION SHALL BE RETAINED AND PROTECTED. AS GRADING IS DONE, INSTALL SILT TRAPS, SILT FENCES, SLOPE DRAINS, TEMPORARY DIVERSIONS AND OTHER RUNOFF CONTROL MEASURES AT APPROPRIATE LOCATIONS TO KEEP SEDIMENT CONTAINED ON SITE. 5. ALL DISTURBED AREAS SHALL BE SEEDED AND STRAW MULCHED AS SHOWN ON THE PLANS IMMEDIATELY AFTER COMPLETION OF GROUND ACTIVITY. FOR LARGE PROJECTS, THIS SEEDING SHOULD BE COMPLETED IN PHASES AS THE DIFFERENT AREAS OF THE SITE ARE COMPLETED. 6. PERMANENT AND FINAL VEGETATION OR STRUCTURAL EROSION CONTROL DEVICES SHALL BE INSTALLED AS SOON AS PRACTICAL UNDER THE CIRCUMSTANCES. 7. THE DURATION OF TIME WHICH AN AREA REMAINS EXPOSED SHALL BE KEPT TO A PRACTICAL MINIMUM DEPENDING UPON THE WEATHER. IF CONSTRUCTION ACTIVITY IS TO CEASE FOR MORE THAN TWO WEEKS, THE DISTURBED AREAS SHALL BE TEMPORARILY SEEDED. 8. ALL STORM SEWER INLET PROTECTION DEVICES SHALL BE PUT IN PLACE AT THE TIME EACH INLET IS CONSTRUCTED. 9. THE CONTRACTOR SHALL MAINTAIN EROSION CONTROL MEASURES AND DEVICES DURING CONSTRUCTION AND UNTIL SILTATION OF THE STREETS AND STORM SEWERS WILL NO LONGER OCCUR. 10. ONCE ONSITE EROSION AND SILTATION OF THE STREETS AND STORM SEWERS WILL NO LONGER OCCUR, THE CONTRACTOR SHALL REMOVE AND DISPOSE OF THE TEMPORARY EROSION CONTROL DEVICES. 11. THESE GENERAL PROCEDURES MAY NOT COVER ALL SITUATIONS. REFER TO CHAPTER 600 OF THE CITY OF CARMEL STORMWATER TECHNICAL STANDARDS MANUAL MANUAL. 12. EROSION CONTROL TO COMPLY WITH INDIANA 327 IAC AND RULE #5, INDIANA HANDBOOK FOR EROSION CONTROL IN DEVELOPING AREAS, AND HAMILTON COUNTY STORMWATER DESIGN MANUAL. 12. ADDITIONAL EROSION CONTROL MEASURES MAY BE REQUIRED IN THE FIELD BY THE INSPECTOR. (63) CONSTRUCTION ENTRANCE INFORMATION The location of the construction entrance is on sheet C3.0. The construction entrance specifications are on sheet C3.1. (B4) SHEET FLOW SEDIMENT CONTROL Silt fence, permanent seeding and erosion control matting will be used as erosion control measures for sheet flows. The location, details, and specifications for each stated sediment control measure is on sheets C3.0 C3.1. (65) CONCENTRATED FLOW SEDIMENT CONTROL The location, details, and specifications for each stated sediment control measure is on sheets C3.0 C3.1. (B6) INLET PROTECTION LOCATIONS AND SPECS The location, details, and specifications for inlet protection measures are on sheets C3.0 C3.1. (B7) RUNOFF CONTROL MEASURES The runoff control measures are the same as those listed for sheet and concentrated flow control. The details and specifications of each runoff control measure are on sheets C3.0 C3.1. (B8) OUTLET PROTECTION SPECIFICATIONS The location, details, and specifications for outlet protection measures are on sheets C3.0 C3.1. (B9) GRADE STABILIZATION MEASURES No grade stabilization structures were needed on the project site. (B10) STORMWATER QUALITY DETAILS The location of stormwater quality measures are on sheet C3.0. The stormwater quality specifications and details are provided on sheet C3.1. REV (B11) TEMPORARY SURFACE STABILIZATION Temporary seeding and erosion control matting will be used as temporary surface stabilization measures if areas are to be left idle for more than 15 days. (B12) PERMANENT SURFACE STABILIZATION Permanent seeding and erosion control matting will be used as permanent surface stabilization measures. The details and specifications for each stated measure are on sheets C3.0 C3.1. SEE CHART FOR MAINTENANCE REQUIREMENTS DATE Erosion control specifications. on sheets C3.0 (B13) MATERIAL HANDLING AND SPILL PREVENTION Expected materials that may appear at the site due to construction activities include, but are not limited to petroleum products, fertilizers, paint and solvents, and concrete. Materials shall be stored in the designated material storage area. Spill prevention for vehicle and equipment fueling shall conform to the following practices: 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. Discourage "topping -off" of fuel tanks. Absorbent spill cleanup materials 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 absorbent 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 area. 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 shutoff 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. 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 soils. Spill prevention for solid waste shall conform to the following. practices: 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. Solid waste generated from trees and shrubs removed during land clearing, demolition of existing structures, 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, non hazardous equipment parts, Styrofoam and other package construction materials. 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 (sued oils, solvents and paints) and chemicals (acids, pesticides, additives, curing compounds) are not disposed of in dumpsters designed 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. 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 construction waste area regularly. Arrange for regular waste collection. Spill prevention for concrete washout shall conform to the following practices: 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 duped onsite, except in designated areas. Locate washout areas at least 50 ft 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. The cleanup parameters shall conform to the following practices: 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 cleanup operations. In addition, a continually updated list of available absorbent materials and cleanup supplies should be kept on site. 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 alteration to this plan. Whmn spills occur which could endanger human life and this become primary concern, the discharge of the life saving protection function will be carried out by the local police and fire departments. 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. Flushing of spilled material with water will not be permitted unless so authorized by the Indiana Department of Environmental Management. Spill prevention for vehicle and equipment maintenance shall conform to the following practices: 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. These procedures are suitable on all construction projects where an onsite yard area is necessary for storage and maintenance of heavy equipment and vehicles. 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 by done in con junction with a stabilized construction entrance exit. Out door 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). 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 water courses. Drip pans or absorbent pads should be used during vehicle and equipment maintenance work that involves fluids, unless the maintenance work is performed over and 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 absorbent 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. Deep vehicles and equipment clean; do not allow excessive buildup 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 by placed under all vehicles and equipment placed on docks, barges, 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. Properly dispose of or recycle used batteries. Do not place used oil in a dumpster or pour into a storm drain or water course. Properly dispose of used oils, fluids, lubricants, and spill cleanup materials. Don not bury tires. Repair leaks of fluids and oil immediately. Spill prevention for fertilizers shall conform to the following practices: Fertilizer's used will be applied only in the minimum amounts recommended by the manufacturer. Once applied, fertilizer will be worked into the soil to limit exposure to storm water. The contents of any partially used bags of fertilizer will be transferred to a sealable plastic bin to avoid spills. Spill prevention for paint and solvents shall conform to the following practices: All containers will be tightly sealed and stored when not required for use. EXCESS PAINT WILL NOT BE DISCHARGED TO THE STORM SEWER SYSTEM but will be properly disposed of according to manufacturers' instructions or State or local regulations. Spill prevention and cleanup shall conform to IDEM form 327 IAC 2 -6 and the Local Fire Department shall be contacted in the case of a material spill occurring. CONTACT INFORMATION: INDIANA DEPARTMENT OF ENVIRONMENTAL MANAGEMENT EMERGENCY REPONSE: 1 -888- 233 -7745 CITY OF CARMEL: 317 571 -2441 CARMEL FIRE DEPARTMENT: 317 571 -2600 (B14) MONITORING AND MAITENANCE GUIDELINES REVISION RECORD DESCRIPTION DES BY APP BY (615) EROSION CONTROL FOR INDIVDUAL BUILDING LOTS for individual building lots is to be provided per these plans and The details and specifications for each stated SWPPP measure are C3.2. EROSION CONTROL MEASURES MAINTENANCE REQUIREMENTS SANDBAG DAM MAINTENANCE REQUIREMENTS 1. INSPECT SANDBAG DAMS AFTER EACH STORM EVENT AND PROMPTLY REMOVE ANY SEDIMENT DEPOSITS TO ENSURE 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 STABIUZED, REMOVE ALL STRAW BALES AND SEDIMENT, 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 CLEAN OUT. 5. AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABIUZED, REMOVE THE FENCE AND SEDIMENT DEPOSITS, BRING THE DISTURBED AREA TO GRADE, AND STABILIZE. 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 IF CLOGGED. 4. INSPECT VEGETATION, AND RE -SEED IF NECESSARY. 5. CHECK THE SPILLWAY DEPTH PERIODICALLY TO ENSURE A MINIMUM OF 1.5 FT. DEPTH FROM THE LOWEST POINT OF THE SETTLED EMBANKMENT TO HIGHEST POINT OF THE SPILLWAY CREST, AND FlLL ANY LOW AREAS TO MAINTAIN DESIGN ELEVATION. 6. PROMPTLY REPLACE ANY DISPLACED RIPRAP, 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. SANDBAG CURB INLET SEDIMENT 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 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. WHEN THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABIUZED, REMOVE THE GRAVEL, WIRE MESH, GEOTEXTILE FABRIC, AND ANY SEDIMENT, AND DISPOSE OF THEM PROPERLY. EROSION CONTROL BLANKET (SURFACE APPLIED) MAINTENANCE REQUIREMENTS 1. DURING VEGETATIVE ESTABLISHMENT, INSPECT AFTER STORM EVENTS FOR ANY EROSION BELOW THE BLANKET. 2. IF ANY AREA SHOWS EROSION, PULL BACK THAT PORTION OF THE BLANKET COVERING IT, ADD SOIL, RE -SEED THE AREA, AND RE -LAY 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 PAD AS NEEDED FOR DRAINAGE AND RUNOFF CONTROL 3. TOPDRESS WITH CLEAN STONE AS NEEDED. 4. IMMEDIATELY REMOVE MUD AND SEDIMENT TRACKED OR WASHED ONTO PUBLIC ROADS 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. (C1) POTENTIAL LANDUSE POLLUTANTS Potential pollutant sources that may appear at the site due to proposed land use activities, but are not limited to vehicles, exposed soil and trash. Potential pollutants include, but are not limited to oil, grease, diesel fuel, gasoline, anti freeze, auto soap and fertilizer. (C2) STORMWATER QUALITY IMPLEMENTATION Final stormwater quality measures will be implemented as grading is finalized. Sequences of stormwater quality items are described in the erosion control schedule in Section B2. (C3) STORMWATER QUALITY DESCRIPTION The overall design has an emphasis on minimization of impervious area (THERE IS NO ADDITIONAL IMPERVIOUS SURFACE BEING ADDED) and maximization of open space. The use of three wet ponds will serve as the main source for removal of suspended solids in the storm water. In addition, long vegetated swales to be maintained at a height of not less than 6" have been specified to help remove suspended solids. Permanent seeding, the use of swales, and the implementation of a landscaping plan will help in the reduction of pollutants in stormwater run -off. (C5) MAINTENANCE GUIDELINES Monitor the ponds and remove any trash or debris collecting along the embankments or in the downstream storm structure the pond outlets into. Remove all trash or debris in the swales along the right -of -way. Swales to be maintained and mowed to height not less than 6". The street should be swept and kept free of sediment carried in by vehicles. A dry absorbent material such as "kitty litter" or "floor dry" should be used to soak up liquids left behind by vehicles. The maintenance for the proposed post- construction water quality measures will be provided for by the property owners. LAKE LINER NOTE In order to minimize water level fluctuations within the lake area(s), it may be necessary to construct a liner to seal the more permeable sandy clays and sand seams which may be present on site. Acceptable liners are as follows: I. Natural Clay Liner A. Laboratory testing shall be performed on the designated liner material to determine the optimum liner compaction criteria. Subsequent to determining this compaction criteria, permeability testing shall be performed on remolded samples, compacted to this standard. Laboratory testing shall be performed at least one (1) month prior to initiating lining activities. B. The contractor shall identify and retain the engineer approved liner material for use on sealing the side slopes and bottom of the lake(s). The optimum natural liner material shall not be used for other portions of site work prior to verification that adequate resources are available and have been stockpiled. It is important that the stockpiled soils be stored in as small an area as possible to retain natural moisture. The contractor should anticipate that additional soil work may be required to bring the liner material to required uniform moisture level. C. A representative of the testing engineer shall be present for inspection of the base and side slopes of the lake(s) prior to and during compaction of the liner materials. D. The clay lining material, approved by the testing engineer, shall be compacted to a minimum of 12 inches thick on the upper two thirds of the side slopes and 18 inches on the lower one third. A compacted minimum of 18 to 24 inches approved lining material shall be placed across the base of the lake. E. The clay liner material shall be regularly sampled and tested for conformance to the moisture and Atterberg limits established for the approved liner material(s). Field density and moisture testing shall also be performed frequently during construction to establish a correlation between density and field permeability. It is imperative that moisture levels be maintained over optimum as determined in laboratory testing. Only by maintaining this condition will it be possible to approach the zero voids condition and maximize natural liner capabilities. Off -site sources for clay liner material may be used with approval by the Owner's representative and one -site testing engineer. F. Compaction of the natural liner shall be performed by equipment operating up and down the slope. Engineered natural clay liners shall not be compacted by equipment operating around the slopes on or near the same elevation. It is important that hydration of the clay liners takes place after installation is complete. This is typically accomplished by natural rainfall or by application of fresh water at the rate of one quarter gallon per square foot for at least 72 hours. This recommended rate of hydration will help prevent shrinkage and cracking of the clay liner and maintain its integrity. II. Bentonite A. Materials and installation method to be reviewed by the testing engineer and approved by the Engineer. III. Synthetic Liner B. Materials and installation method to be reviewed by the testing engineer and approved by the Engineer CID 1� CID I CID 0 0 J cc v) (NI CO 114 01 Nt o C Q v w El I N (n O t U v I ca C (1( N X L i r 0 0 011111% G P. G LE,`S S ���i N o PE10403858 STATE OF Let NA ,,l, /11111 (?7 DATE: 03/19/09 DWN BY: EAG CHKD. BY: EAG SCALE: 1" 60' DATE: 03/16/09 ci) LT.1 E-1 0 z z 0 a •t 0 E-4 PROJECT NUMBER MSI.023 DRAWING NUMBER C3.2 SHEET 6 OF 8