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1 l~ ' ~ ®attle Mountain Ruourcca, Inc. ll2 Perini[ Mod ifiution c ' The results of geochemical testing conducted for the approved permit indicates that no acid production or leaching of degradational quantities of any metals or other constinlents from the waste t rock at the San olect is ted to occur. The results of the original test program are included in lion D.3.3.2 of this omen[. ' Milling and tailings disposal operations will remain unchanged from thei approved permit. Reclamation plans for the project facilities remain essentially the same as ptieviously approved. 1 Minor changes relate to reductions in waste disposal azeas and partial backfillin~ of the West Pit to a level that eliminates surface impou the pit. Reclamation of the West Pit and waste rock disposal azeas is discussed in Secti E.2 o this docu n the unlikely ent that mining is ' terminated eazly, provision has been made for partial backfilling of the West pit using waste rock rn\the nearby waste rock disposal azeas. This mine closure alternative is presented in Section ' E.3. to rock will be backfilled into the West Pit to an elevation of approxima 8600 fee . The results of a recent hydrogeologic evaluation indicate that following closure th groundwater level 1 within the pit area will rise to an elevation of approzimatel _ 570 f the groundwater-tlew 1~~~ system will return to a regime similar to the pre-mining conditions. proposed permit Seasea~ ' modification will not require changes to th augmentation plan fod the facility. The V0""~-~ ~ hydrogeologic evaluation can be found ' Exhibit G o 's document. , ' Wildlife, soils and vegetation inventories were completed for the entire permit {~ in the original application. Since the permit area has remained unchanged, wildlife, sons, and vegetation ' inventories completed and approved for the entire permit area do not require revision and are not addressed as pazt of this modification. The wildlife report is found in Ezhibitl H of the approved permit. The soils report is found in Exhibit I of the approved permit. The vegetation report is ' found in Exhibit J of the approved permit. ' Reclamation bond calculations for the proposed plan involving partial bac~illing of the pit concurrent with mining operations are contained in Exhibit L. Reclamation bond calculations for ' the early closure alternative requiring partial backfilling of the pit with waste rock excavated from the waste rock disposal areas are also presented in Exhibit L. ' For ease of review, those sections of the approved permit for which no changes aze proposed are referenced but not included. Only those sections which contain proposed changes are included in ' detail. ' ar z lat o. _