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<br />G. Significant Spills <br />There is no record or knowledge of significant spill of <br />fuel or process chemical at this site. <br />H. Areas Associated with Mining Activities <br />1. Domestic Water <br />There is no discharge of sanitary wastes into the <br />Stormwater Outfall. Sanitary wastes ar-e Dandled via <br />portable vessels maintained by outside contractor. <br />2. Process Water <br />There is no process water produced by mining, crushing, <br />screening, and stockpiling operations. There is no <br />discharge of process waters to stormwater outfalls. <br />3. Existing Storrnwater Collection Systems <br />Stormwaters from mining areas and stockpiles arc directed <br />across the mining areas at a 1% slope to the main <br />drainage ditch located between the mining area and the <br />Highway US 50 Right-of-Wav. This main drainage ditch <br />follows the ROW curve from West to East along the South <br />side of Highway US 50 and is directed through a culvert <br />at the intersection of CR 37 and US50, then continues <br />East 500' to the intersection of Sand Gulch drainage from <br />the South into the Arkansas River via a concrete highway <br />overpass culvert installed in 1988. <br />Sand Gulch drainage borders the Eastern edge of the mine <br />property and can potentially receive surface runoff and <br />sedimentation from the mine property in the area of the <br />scales, maintenance, and fueling area. Tfie aaridy, dry <br />gulch area is quite a broad area (200') across just <br />Suu t_I1 of thie I~ighway overpass/culvert. Sand Gu loll does <br />nut flow surface water unless a storm event is underway. <br />The moderately sloping area immediately to the East of <br />the htine property has been graded, seeded, and mulched to <br />promote native reveget_ation of tt~e area. This action <br />should help minimize sheet erasion or washing of the <br />area East of CR 37 and subsequent sedimentation of Sand <br />Gulch drainage. <br />A strip of ground 50-100' immediately South of the (lining <br />Area lies slightly above r_he mining area and shows a soil <br />profile reflecting a mix of the gravel deposit and the <br />granite bedrock just above. These areas have been graded, <br />seeded, and mulched where possible to minimize erosion <br />-5- <br />