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1 <br />Bartle Mountain Reaourcu, Inc. <br />It2 Permit Modification <br />' The acidification/neutralization potential tests fo the biotite gneiss <br />showed a slight potential for acid production in the first ample and minimal <br />' potential in the second sample. However, results of batcfM tests and humidity <br />cell tests performed on the biotite gneiss waste rock Indicate no sulfide <br />reactivity which could result in acid production, or no apbreciable change in <br />any of the constituents monitored over the entire test period. Test results for <br />the biotite gneiss are presented in Appendix A. <br />' Acidification/neutralization testing of the pink g eiss and Santa Fe <br />Conglomerate waste rock types detected no sulfur in ~ty of the samples <br />' tested, and indicated no potential for acid production and ~ moderate capacity <br />for acid neutralizing (Appendix A). <br />' Leachability testing in the Santa Fe Conglomerate produced a slightly <br />alkaline leachate devoid of any trace elements. The pin gneiss leachate is <br />also slightly alkaline with the majority of trace elements be, ow detection limits <br />(Appendix A). <br />' Since approval of the original permit, geologic devlelopment of the ore <br />/- body and pit area has resulted in the availability of a laz a number of waste <br />' rack samples from rock chips and core. These samples be inspected and <br />~' classified to supplement the past information on the geo gic characteristics <br />1j1 ~~ `/~, ~ ~ , , ~`~ fa ~ of the three types of West Pit waste rock. The objectiv of the review will <br />' ;~'1 ~~~ ~ be to confirm and update the original data on the geoche{mical nature of the <br />'~' p ~ waste rock. A Battle Mountain geologist familiaz with khe waste rock will <br />'a,,,,l /1~`I ~~ ~/ <br />' perform the study. Based upon the results of the study, additional studies or <br />p j~ testing may be completed. <br />' D.3.4 Facility Conswction <br />' D.3.4.1 General <br />Facility construction for the amended waste rockidisposal azeas will <br />' follow the conswction guidelines previously approved and described in <br />Section D.3.1. The final operational configuration of e~lch waste rock pile <br />' will include a 50 ft maximum lift height, a 1.SH:1V s1oAe angle and a 75 ft <br />wide bench at the crest between multiple lifts. The benches will enable a <br />3H:1 V overall slope to be maintained. Foundation prt-p•aration will consist <br />ay - - p_ID SRK Pto~ect no <br />