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San Joaquin County Community Project Description <br /> Development Department <br /> during mining. The agricultural pond will be created unless a lesser amount of <br /> mining than planned occurs,more fines are extracted than expected,or clean fill <br /> material from other projects required disposal. <br /> Operating Hours and Employment <br /> Typical operating hours would be Monday through Friday from 6 a.m.to 8 p.m. <br /> (14 hours)for the quarry and aggregate plant,and 5 a.m. to 5 p.m. (12 hours)for <br /> the asphalt and portland cement concrete plants. If needed,the Project batch <br /> plant and loading operations may operate up to 24 hours per day,7 days per week <br /> for brief periods to supply materials for nighttime road improvement projects. <br /> The Project will generate employment for up to 10 skilled workers,including <br /> heavy equipment operators,plant operators,maintenance personnel, and support <br /> staff. <br /> Material Transport and Equipment Use <br /> Material would be excavated, screened and washed, and transported offsite using <br /> conventional mining practices and equipment described below. First, soil and <br /> overburden would be removed with dozers and scrapers. The topsoil would be <br /> _ stockpiled in a perimeter berm,or moved to a previously mined area being <br /> reclaimed. Side slopes would be developed as mining progresses. Marketable <br /> sand and gravel would be loaded and hauled to the processing plant or to nearby <br /> electric conveyer belts. At the plant, the materials would be washed, screened, <br /> L and crushed and then stockpiled by electric conveyor. Mobile diesel trucks may <br /> be used initially for transferring materials from active pits to processing plants, <br /> but the long-term operational plans are to use electric conveyors. <br /> r <br /> Material from the stockpiles would be transferred to 25-ton road trucks for <br /> transport offsite or would be transferred to the asphalt concrete plant,concrete <br /> batch plant, and recycle area. Truck trips generated by the Project for these <br /> purposes are estimated to range from 224 peak trips per day at start up to 358 <br /> peak trips per day during full operation. <br /> Typical mobile equipment includes primarily diesel equipment,with the <br /> exception of the conveyors,including the following. <br /> ■ Bulldozer <br /> ■ Self-loading scraper <br /> ■ Front-end wheel loader <br /> ■ Portable water pump <br /> ■ Motor grader <br /> DeSilva Gates Quarry Project <br /> Draft Environmental Impact Report 2-7 <br /> AS 0510505 <br />