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HomeMy WebLinkAboutC05.2 Erosion Control NotesEROSION CONTROL SCHEDULE EROSION CONTROL MEASURE MAINTENANCE INSTALLATION SEQUENCE STONE ENTRANCE AS NEEDED N mai iv 11 (3' rgh 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 DWN BY: JCB CHKD. BY: BSC SCALE: N.A. DATE: 10/12/05 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 f A] RD. -IL, MOWN N UNITS FINISHED REMOVAL OF STRAW BALES _LI /A N/A AFTER ALL AREAS DRAINING TO THESE AREAS ARE STABILIZED AFTER ALL AREAS DRAINING TO THESE AREAS ARE STABILIZED REMOVAL OF INLET PROTECTION 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 CEC PROJECT NUMBER 051872 DRAWING NUMBER C5.2 SHEET 9 OF 16 EROSION 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 _LI /A N/A AFTER ALL AREAS DRAINING TO THESE AREAS ARE STABILIZED AFTER ALL AREAS DRAINING TO THESE AREAS ARE STABILIZED REMOVAL OF INLET PROTECTION 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 (A3) )JECT DESCRIPTION This project is located on the north side of 131st Street just west Rangeline Road. The project lies within the limits of the City of Carmel. The overall site is approximately 0 acres. The existing site is currently occupied by three single family residential dwellings and associated structures. The cover over the site consists mainly of grass with some trees, scrub and brush. The proposed improvements will consist of the demolition of all buildings and the construction of 18 buildings to be used as multi family townhomes. (A4) NITY MAP The vicinity map showing the project location can be seen on sheet CO.O. (A5) GAL DESCRIPTION The legal land description can be seen on sheets C2.0. Longitude: W 67.84' Latitude: N '58.73' (A6) LOT LOCATION AND SITE IMPROVEMENTS The property boundaries, utility locations, roads, structures and common areas can be seen on sheets C2.0, C3.0 C4.0. (A7) )ROLOCIC UNIT CODE 20201090030 (A8) UIRED STATE OR FEDERAL WATER QUALITY PERMITS There are no required State or Federal water quality permits for the project site. (A9) DRMWATER DISCHARGE POINTS Stormwater n the site will be collected by the surface inlets routed and then via subsurface storm sewers to existing storm sewers in 131st Street. (A10) SITE WETLANDS, LAKES AND WATER COURSES There are no wetlands, lakes or water courses on or adjacent to the site. (Alfi RECEIVING WATERS Stormwater t leaves the site will drain to Little Cool Creek, Cool Creek, I ultimately the White River. (Al2) OTENTIAL DISCHARGES TO GROUNDWATER There are no sinkholes or uncapped abandoned wells located on the project site or downstream of the project site. (A13) 00 YEAR FLOODPLAIN, FLOODWAYS AND FRINGES The project site does not lie within a 100 year floodplain. (A14) :sTIMATED PEAK DISCHARGE EXISTING Pre-construction: 2-year run -off 100 -year run -off PROPOSED Post-year run -off 100 -year run -off Residential Residential ,ercial /Residential Commercial 2.85cfs 5. 83cfs 2. 12cfs 4. 58cfs These numbers were calculated using the it hydrogrph in ICPR. 015) \DJACENT LANDUSE 'The existing end uses adjacent to the site are as follows: (A16) ONSTRUCTION LIMITS The overall turbed area is 4.5 acres. (A17) XISTING VEGETATIVE COVER The existing to is currently covered mainly with grass, trees, and some scrub and brush. (A18) )ILS MAP Soil maps from the United States Department of Agriculture, Soil Conservation Service, identify Miami silt loam (MmB2 95% Site), and Brookston silty clay loam (Br 5% Site). All soils on -site are classified as type "B A soils map is included on sheet C5.0 of the construction plans. (A20) OFF -SITE CONSTRUCTION PLAN There is no off -site construction planned for this project. (A21) SOIL STOCKPILE, BORROW AND /OR DISPOSAL A temporary soil stockpile should not be needed for this project. (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 (SWCD 317- 773 -1406) 48 HOURS PRIOR TO STARTING CONSTRUCTION. STEP STEP STEP STEP STEP 10: STEP 11: STEP 12: STEP 13: 3: SCHEDULE A PRE CONSTRUCTION MEETING WITH (SWCD). 4: DESIGNATE A PERSON TO BE RESPONSIBLE FOR THE SITE INSPECTIONS AFTER EACH 1/2" RAIN AND A MINIMUM OF ONCE EACH WEEK. 5: INSTALL CONSTRUCTION ENTRANCE. 6: INSTALL SILT FENCE ALONG THE PERIMETER OF THE SITE WHERE NOTED. STEP 7: ROUGH GRADE SITE AND INSTALL TEMPORARY SEEDING IN THE REAR OF ALL BUILDING LOTS AND IN COMMON AREAS. STEP 8: INSTALL STORM INLET PROTECTION AS STORM SEWERS ARE BEING COMPLETED. STEP 9: INSTALL EROSION CONTROL BLANKET WHERE NOTED. INSTALL REMAINING SUBSURFACE INFRASTRUCTURE. INSTALL PAVEMENT AND FINAL GRADE LOTS. INSTALL LANDSCAPING AND FINAL SEEDING. REMOVE ALL SEDIMENT CONTROL PRACTICES ONCE THE SITE IS STABILIZED. 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. 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. 2. 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. 3. 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. 4. 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. 5. PERMANENT AND FINAL VEGETATION OR STRUCTURAL EROSION CONTROL DEVICES SHALL BE INSTALLED AS SOON AS PRACTICAL UNDER THE CIRCUMSTANCES. 6. 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. 7. ALL STORM SEWER INLET PROTECTION DEVICES SHALL BE PUT IN PLACE AT THE TIME EACH INLET IS CONSTRUCTED. 8. THE CONTRACTOR SHALL MAINTAIN EROSION CONTROL MEASURES AND DEVICES DURING CONSTRUCTION AND UNTIL SILTATION OF THE STREETS AND STORM SEWERS WILL NO LONGER OCCUR. 9. 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. 10. THESE GENERAL PROCEDURES MAY NOT COVER ALL SITUATIONS. REFER TO EROSION CONTROL PLANS FOR SPECIFIC NOTES AND ADDITIONAL DETAILS 11. EROSION CONTROL TO COMPLY WITH INDIANA 327 IAC AND RULE #5, AND INDIANA HANDBOOK FOR EROSION CONTROL IN DEVELOPING AREAS 12. ADDITIONAL EROSION CONTROL MEASURES MAY BE REQUIRED IN THE FIELD BY THE INSPECTOR. (B3) CONSTRUCTION ENTRANCE INFORMATION The location of the construction entrance is on sheet C5.0. The construction entrance specifications are on sheet C5.1. (84) SHEET FLOW SEDIMENT CONTROL Silt fence and temporary seeding will be used as erosion control measures for sheet flows. The location, details, and specifications for each stated sediment control measure is on sheets C5.0, C5.1 C5.2. (BS) CONCENTRATED FLOW SEDIMENT CONTROL The location, details, and specifications for each stated sediment control measure is on sheets C5.0, C5.1 C5.2. (B6) INLET PROTECTION LOCATIONS AND SPECS The location, details, and specifications for inlet protection measures are on sheets C5.0, C5.1 C5.2. (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 C5.0, C5.1 C5.2. (B8) OUTLET PROTECTION SPECIFICATIONS The location, details, and specifications for outlet protection measures are on sheets C5.0, C5.1 C5.2. (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 C5.0. The stormwater quality specifications are provided on sheets C5.1 C5.2. (B11) TEMPORARY SURFACE STABILIZATION Temporary seeding will be used as temporary surface stabilization measures. Due to the accelerated construction timeline of this project, temporary seeding may not be necessary. (812) PERMANENT SURFACE STABILIZATION Permanent seeding will be used as permanent surface stabilization measures. The details and specifications for each stated measure are on sheets C5.0, C5.1 C5.2. (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. Arra:=ge 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 wil, be made aware of techniques for prevention of spills. They will be informed of the requirements and procedures outlined in this plan. May will be kept abreast of current developments or new information on the prevention of spills and or necessary alteration to this plan. When 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 conjunction 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. 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, Loth yes, 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 Carmel Fire Department shall be contacted in the case of a material spill occurring (B14) MONITORING AND MAITENANCE GUIDELINES SEE CHART FOR MAINTENANCE REQUIREMENTS EROSION CONTROL MEASURES MAINTENANCE REQUIREMENTS STRAW BALE DAM MAINTENANCE REQUIREMENTS 1. INSPECT STRAW BALE 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 STABILIZED, 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 AF ILlt 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. AE• ILR THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED, 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 NE 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 FILL 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 GEOTEXIILE 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 STABILIZED, 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 AI- tut 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. Cl 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 building unit is finished and 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 and maximization of open space. 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 storm sewer structures and remove any trash or debris collecting. 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 homeowner's association. N STATE 1."" PE1O403858 OF• 14. D IAN S /ONALe' %N DATE: