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<br />~. <br />en <br />~, <br />OJ <br /> <br />evaporator. Total trea~ent cost, including boron removal, <br />ranges between SO.80/1000 gal (: S260/acre-ft) and $1.25/1000 <br />gal ($400/acre-ft). Concentrate disposal costs average <br />about $1/1000 gal ($330/acre-ft) of mine water treated. <br />The total average cost of disposal and treatment is <br />$2/1000 gal (S650/aore-ft), or in the range of 2.0 to <br />6 <br />9.0~/10 Btu. <br /> <br />Ouantitv: <br /> <br />b) Runoff and Leachates <br /> <br />Quality: <br /> <br />125 gpm (200 acre-ft/yr) runoff from plant and mine area <br /> <br />and 260 gpm (420 acre-ft/yr) of leachate from mined-out <br /> <br />shale disposal area. <br /> <br />Plant ~~off most probably of good quality. Leachate from <br /> <br />mined-out shale disposal area probably has an inorganics <br /> <br />level lower than the levels in local waters and an organics <br /> <br />level possibly higher, bu~ quali~l is unce~tain at this ~ime. <br /> <br />It is likely to be of fair to good quality. <br />Collected and used for revegetation, shale disposal, dust <br />control and other low quality water needs. No treatment. <br />cl Mine Water Treatment Concentrate <br /> <br />Disposal: <br /> <br />Quantity: <br />Quality: <br /> <br />275 gpm (= 440 acre-ft/yr). <br /> <br />Same as mine drainage water concentrate. Total dissolved <br />solids of 5,500 to 8,000 mg/l. Mostly inorganic salts, <br />organic contamination expected to be low, but concent=ations <br />unknown at this time. <br />Utilize for mine uses, dust control and shale disposal. No <br />treatment needed. If water is in excess of plant needs <br />and disposal is requi~ed, this would be done by forced <br />evaporation in same type vapor compression system <br />used for concentrate from excess mine drainage water <br />treatment. Disposal cost would be about Sl/lOOO gal <br />(= .330/acre-ft) of mine water t~eated, or 0.1~/106 Stu <br />of p~oduct output. <br />d) Soi1er Feedwater Treatment Slowdown <br /> <br />Disposal: <br /> <br />Quantity: <br />Qualitv: <br /> <br />15 gpm (24 acre-ft/yr). <br /> <br />1 to 2\ total dissolved solids; no organic contami~ation. <br /> <br />,. <br />-~ <br />