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collected across the mineralized structure,shows an ABP value of zero, having neither any acid <br /> generating nor buffering value. Sample MH-3,a low percentage spot sample,was specifically chosen to <br /> represent the highest concentration of sulfur producing material found within the project area. That <br /> sample was determined to have an ABP value of-68, meaning that chemically, it has the ability to be <br /> acid generating, but represents a small fraction of the total volume of ore that might be produced. <br /> Samples MH-4 and MH-5 were Braun standards,submitted to the laboratory for quality assurance. As <br /> can be seen in the table,and by comparing the laboratory results attached in Appendix A,the laboratory <br /> results correlate well with the known percentages of minerals shown for those two samples. <br /> Rate Testing <br /> In order to better assess the generation of sulfur as it would relate to actual conditions that might be <br /> anticipated during actual mining, Braun ran an additional leach test. This test was designed to mimic <br /> surface storage conditions in a moist oxidizing environment,and assumed a worst case that the material <br /> would be exposed to rain and standing water. <br /> Table 2 <br /> Acid Leach Exposure Results <br /> Mineral Mountain Sample MH-3 <br /> Source- Braun Environmental,Inc. <br /> Hour PH <br /> 0 6.99 Acid Production Test -Sample MH-3 <br /> 4 6.32 <br /> 8 5.98 8 <br /> i <br /> 24 6.14 j 6 <br /> 35 5.59 <br /> x 4 <br /> 48 5.67 a <br /> 72 5.63 2 <br /> 96 5.23 <br /> 120 5.15 0 <br /> 144 5.38 0 50 100 150 200 250 300 <br /> 168 5.58 Hours <br /> 192 5.77 <br /> 216 5.82 <br /> 240 6.25 <br /> 264 6.31 <br /> 6 <br />