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<br /> <br />4.0 Potential Pollutant SourceslMaterial Inventory 8 BMP's <br />The most effective control is to limit the amount of potential pollution in the first place. In a sand and <br />gravel mining operation the large and ongoing site disturbance causes sediment pollution of <br />stormwater. Consequently every effort has been made to limit disturbance where possible and to <br />revegetate as soon as practical. A specific list of Potential Pollutant Sources follows in Table 4.1 that <br />also summarizes the associated Control Measures and Best Management Practices (BMP) for each. <br />4.1 Table of Potential Pollutant Sources and Control Measures <br />POTENTIAL SOURCE POLLUTANT CONTROL MEASURES/BMP's <br />Site Disturbance Sediment -Limit active mining area to 6 acres. <br />- stripping and stockpiling - Revegetation within 6 months. <br />of overburden and topsoil -Concurrent reclamation. <br />Pit Area/Dewatering trench Sediment -Limit active mining area to 6 acres. <br />- stormwater will drain into -Sediment ponds at each pump ouffall. <br />dewatering trench and then <br />be pumped to intermittent <br />stream <br />Stockpiles Sediment -Keep product stockpiles in bottom of pit in area of <br /> controlled drainage as much as possible. <br /> - No pitrun stockpile, pitrun shall be loaded directly from <br /> bank. <br /> -Topsoil & overburden stockpiles will be seeded if <br /> undisturbed for more than six months. <br /> - Topsoil stockpiles shall have a slope not steeper than 3:1. <br /> -Combined stockpile limit not to exceed 60,000 tons. <br />Processing 8 Crushing Sediment -Maximum 50 dayslyear. <br /> -Limit of one active crusher operation. <br /> - Limited crushing hours: Sam - 5pm, Monday through <br /> Friday. <br /> - Crushing to occur in bottom of pit whenever possible. <br /> -Minimize handling, no raw material stockpile, material will <br /> be loaded directly from bank. <br />Haul Roads Sediment -Haul roads will be chemically stabilized. <br /> - Water truck on call by scale person when required. <br /> - Sediment ponds for upper haul road ditches. <br />Equipment oil/fuel leaks & OillFuel -All major equipment service performed offsite. <br />oil changes -Oil changes by trained mechanic with full service truck with <br /> tank for waste oil. <br />Fuel Tank Spill Diesel fuel -Earthen berms of sufficient size to contain tank capacity, <br />- a 2000 gallon tank will be <br />on site for use by the <br />crusher <br />