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~. . <br />L <br />Timothy C. Smith <br />December 18, 1979 <br />page 2 <br /> <br />3) the limitations of the px~sent pre-sorting system to detect small amounts <br />of. ore intermixed with la ge amounts of waste rock. <br />4) alternate methods of pre- orting. T*iese methods should be sensitive <br />enough Co insure this Department that. ore is not being deposited as waste <br />rock. <br />5) the percent of ore intern red with the waste rock. An extensive survey <br />of the waste rock stock p.le should he carried out to determine: this. <br />6) runoff and rainfall condi .ions for th.~ Schwartzwalder mine and ore valley. <br />7) the acid content of rain 'n this region. <br />8) the physiochemical reacti ms between the ore, the waste rock and the rain <br />water. <br />9) an estimate of the amount of 226Ra carrieJ to Ralston Creek as runoff from <br />Lhe waste rock pile. <br />10) the disposal of possibly :ontaminaCcd railroad C.imbers and other mina waste <br />below Che waste rock stoc pile. A survey of these waste materials should <br />be conducted and if any n iterials arc contar.~in.~ted, an alCernat(ve method <br />of disposal should be de~:ribed and implemented upon the approval of this <br />Department. A procedure 'o survey other waste materials beCnrc they arc <br />disposed of iu this manne should be described. <br />AJH:MB:ew <br />cc: Edward McGrath <br />bob Shukle <br />George Yrincc <br />~12ade Orell <br />Sincerely, <br />i <br />,f <br />(' ~, . ~~, <br />Albert J. Ha e, f/~ctor <br />Radiation and Hazardous Wae[cs <br />Control Division <br />