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Other Equipment/Operations -Under both alternatives, a portable asphalt plant may be used <br />but will not be on site for more than 90 days. The Plan of Operations for Alternative B also <br />mentions the possibility of a portable concrete plant. <br />Waste Disposal -Under both alternatives, wastes produced by the operations (trash, debris, <br />small spill residues} would be hauled off site to an approved solid waste disposal facility such as <br />the Gunnison Landfill. No burning of wastes would be allowed, and chemical toilets would be <br />used. <br />Slormwater Management -Both alternatives would use the existing storm drainage ditches <br />that follow along the access road and holding ponds on the site for control of stormwater and <br />associated erosion, and the reduction of sediment in waters leaving the site. Under Alternative <br />A, stormwater would be controlled by existing berms, ditches, and sediment basins near the <br />scales, and the drainage ditches have catch structures to slow water and drop sediments. <br />Under Alternative B, these same structures would be used, and additional settling structures will <br />be constructed by the operator as the floor of the pit expands. The pit floor wilt be designed in a <br />manner that contains practically all discharge from the site, and any discharge that leaves the <br />site will meet the State of Colorado, Water Quality Control Division -Colorado Discharge Permit <br />System requirements. <br />Hazardous Material Management -Under both alternatives, fuels and oils needed for the <br />equipment would be stored in temporary mobile tanks or small containers and drums. No <br />permanent fuel tanks would be permitted. Service trucks would carry less than 110 gallons of <br />fuel. Spills would be cleaned up immediately and for all releases to the ground of contaminating <br />or toxic substances in excess of 20 gallons, the operator will promptly report the following <br />information to the park superintendent or his designee: the time the spill was discovered; the <br />type of product released, the location, estimated spill volume, cause of spill, area covered, <br />estimated rate of release if ongoing, direction of movement, description of contaminated area, <br />proximity to surface waters or roads, weather conditions, what steps are being taken to remedy <br />the situation, and initial response equipment required. No pesticides would be used unless <br />previously approved. <br />Traffic Control -Under Alternative A, no additional traffic control would be required. The <br />increase in truck traffic proposed under Alternative B would not require additional traffic control. <br />Hours/days of Operation -Under Alternative B, mining would occur from March 1 through <br />December 31, during daylight hours only. Processing would occur from April 1 through <br />December 31. Under Alternative A, the remainder of the 12.4 acres would also be mined during <br />these periods, but mining would likely not occur during the entire period due to the small amount <br />of mineral material remaining. <br />2.4. Sequence and Extent of Operations for each Alternative <br />Although mining operations would be similar for both alternatives, the extent and the <br />sequencing of the mining would vary considerably, as described below. <br />Alternative A (No Action) -Under this alternative, production would be limited to what is <br />needed to remove the remainder of the mineral materials within the 12.4 acres, which is located <br />on the northeast end of the mineral reservation. No phasing of operations would be done, given <br />the small amount of material to be removed. Average current production at the pit is 10,000 <br />tons per year, and the highest production to date has been 15,000 tons per year. <br />~I <br />18 <br />