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/UN 11 2010 <br />r .r <br />BATTLE MOUNTAIN RESOURCES, INC. D Uning and Safety <br />June 09, 201.0 <br />Mr. Allen Sorensen <br />State of Colorado <br />Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Re: Battle Mountain Resources Inc. <br />San Luis Project ,/ <br />CMLRB Permit No. M-88=11.2 <br />,May 2010 Monthly Report <br />Dear Mr. Sorensen: <br />The following summarizes monitoring and site activities at the Battle Mountain Resources Inc. <br />(BMRI), San Luis Project for the month of May, 2010. <br />Surface and ground water monitoring and analysis were completed for all required sites during <br />the month per the terms and conditions of the TR-32 Quality Assurance and Quality Control <br />(QA/QC) Plan. <br />Vacuum on the tailing lysimeters was verified on May 31St, no water was present for sampling <br />and subsequent analysis. <br />Depths to water were collected for the tailing impoundment main embankment piezometers and <br />the West Pit monitoring wells on May 31st. May tailing impoundment piezometer measurements <br />identified these installations were either dry or contained less than 12 inches of water as <br />illustrated in Table 2. Tables 1. and 2 below identify the depth to water measurements collected <br />for each of the site monitoring wells, piezometers and lysimeters as required by the terms and <br />conditions of the TR-32 QA/QC plan. <br />The leak detection system was measured on May 27`". A total of 570 gallons of water was <br />excavated from the leak detection system yielding a monthly average of 24.13 gpad. The tailings <br />pond under-drain measured 25 gpm. <br />During March the West Pit water treatment plant operated efficiently discharging a total of <br />7,649,800 gallons (23.48 acre-feet) of water to Rito Seco Creek and a total of 378,500 gallons <br />(1.16 acre-feet) of water was transferred from the water treatment plant to the tailings <br />impoundment. Seepage along Rito Seco Creek remained dry during the month. <br />P.O. Box 310 - San Luis, Colorado 81152-0310 - (719) 379-0798 - Fax (719) 379-0713