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<br />t Battle Mountain Raourcee, Inc. <br />I l2 Permit Modificeticn <br />oxidation. [n the case of the biotite gneiss rock type„ the samples were <br />selected based on a change in grain size which indicated possible reworking <br />of the material. <br />The geochemical testing program consisted of the fpllowing test series: <br />' 1. Whole rock analyses (x-toy fluorescence); i <br />' 2. Leachability; <br />3. Acid-base accounting; and <br />4. Humidity cell testing. <br />' The results of geochemical tests are used to dkvelop mine waste <br />management practices. Whole rock analyses are conducted to determine the <br />overall composition of the waste rock. Leachability tests are used to <br />determine the potential for leaching of constituents whicf~ may affect surface <br />' or ground water quality. The potential of a given waste to generate'acid <br />is measured through static and kinetic testing. Static teg, which is also <br />referred to as acid-base accounting, involves the determination of the acid <br />' generating and neutralizing capacity of waste by standard story methods. <br />Kinetic tesu (humidity cell testing) are conducted to asstrss the behavior of <br />' waste over time. More detail on humidity cell tests is provided in Appendix <br />A. <br />' The waste rock samples of biotite gneiss were considered the samples <br />most likely to contain high quantities of mineralized constituents, and the full <br />' suite of geochemical tests was run on these samples. Thd remaining samples <br />were analyzed for total sulfur and neutralization potent~al, and then batch <br />(leachability) tests were run on the material. Based on thd test results, further <br />' testing of the remaining samples was not considered necessary. <br />The x-ray Fluorescence (XRF) test results of the Ibiotite gneiss show <br />' that the primary constituent by weight is silica, representing 72 to 77 percent <br />of the material. Aluminum, iron, and potassium ire the only other <br />' constituents which comprise more than one percent by v~eight of the rock <br /> <br /> <br /> ay p_g ~xt o. <br />t <br />