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Dust control chemicals, when used, reduce water use on site. For washing of <br />materials, water is recycled, reducing use and discharge, and protecting water <br />quality. For evaluation purposes, based on the assumptions listed below, the <br />estimated operating losses of water for the site are shown in the following table. <br />Tahle G2 Maximum Proiect Water Requirements <br />Activity Acre-Feet Period Flow Remarks <br /> ear al/day) <br />Dust control of roads 2 0.1 in/day, 550 2.0 acres max <br /> 120 days <br />Dust control of plant 10 0.1 in/day, 2700 10 acres max <br />sites 120 days <br />Dust control of pit area 10 0.1 in/day, 2700 10 acres max <br /> 120 days <br />Water removed with 2.1 Variable 600 4% of weight of product <br />materials mined <br />Washing of materials 0.1 120 days 50 Evaporative loss <br />Total water required 24.2 acre-feet 6,600 Worst-case <br />Water available 90 As needed Not including direct <br /> precipitation <br />This is based on the following assumptions: <br />70,000 tons per year produced. <br />• Maximum (all roads in operation): 2.0 acres. <br />Plant areas include long-term stockpiles, storm water structures, and other <br />areas with no traffic and no need for dust control. Total plant areas are <br />limited to 10 acres, but only 1 /2 (5 acres) will require regular dust control. <br />Plant sites are also seasonal: the asphalt plant would usually only operate <br />approximately 4-8 months per year, the screening/crushing plant <br />approximately 11 months per year. <br />• Maximum pit area with exposed surface including temporary topsoil <br />stockpiles is 10 acres for any given year (per county permit), which are <br />assumed to be completely open and require application of water for the <br />entire period of their use, but actual mining and processing <br />(crushing /screening) is expected to take approximately 60 days per year. <br />• No precipitation during any operations on site. (In actuality, as many as 30 <br />days per year we can expect at least 0.1 in/day and so require no watering.) <br />(Annual precipitation in the area is 17 inches per year.) <br />Exhibits for 112(c) AM-02 Application - M-1994-108 - 2010 - Page 40