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CashMineWaterM 3.3.1.2 Mine Area Well AdrianBrown The level and quality of groundwater in the vicinity of the mine will be monitored by sampling the Cash Mine Borehole, which is used for dewatering the mine void. Water flowing into the mine is in general sourced in the mineralized faults and fractures that the mine exploits, so this monitor point is appropriate for monitoring the quality of water in the mineralized bedrock. During the entire time that the mine is dewatered groundwater will flow into the mine, and based on groundwater modeling of the system, no groundwater can leave the mine void by a groundwater pathway until the water level in the mine reaches approximately Level 1 (115 feet below ground surface). The modeling results are shown in section in Plate 8, and aze reported in Attachment 1. The quality of water that enters the mine is indicative of the quality of water that is present in the veins and faults that contain the gold-bearing ore. The sample taken from the mine void represents an average sample of this water, collected during the period since the mine was last dewatered. The Cash Mine Borehole The well was drilled in September-October 1996 for mine dewatering, and a permit application has been submitted to the State Engineer by MRV on November 3, 2006°. The well is lined with 6" diameter welded steel casing, cemented from top to bottom with neat cement grout. The borehole terminates in the mine void at Level 7, at an approximate elevation of 7553 ft msl (552 feet below collar). The bottom of the hole is open to the mine void, and there is no screen. 3.3.1.3 Downgradient Well A downgradient well will be utilized to monitor the quality and level of water that is present in the bedrock downgradient of the mine. This well will monitor any impact that the mine has on downgradient groundwater, likely in country rock (as distinct from an orebody). The well to be used will be designated Monitor Well MW-5, and will be constructed downgradient of the Cash Mine, as shown on Plate 4. This well will be 200 feet deep. The downgadient well will be constructed with 90 feet of alternating 2" PVC screen and casing in 10 foot lengths, located in a 100 foot long interval filled with 10!20 screen gravel pack interval. The remainder of the hole will be cased with 2" schedule 40 PVC, and the annulus sealed with bentonite slurry to the collaz. The proposed completion is shown in Plate 5. The completion will be conducted in accordance with SOP04 -Groundwater Monitoring Well Installation (attached). After completion of the well, it will be developed by pumping or bailing, in accordance with SOPOS - Monitor Well Development. The well will then be tested for permeability in accordance with SOP06 - Single Well Testing. ° Adrian Brown Consultants, Inc., 2006. Waier Well Permi( Application, Cash Mine Borehole. Form GWS-45 submitted to the Colorado State Engineer's Office on behalf of MRV, November 3, 2006. 1601A-20061106 5