2020-04-21_HYDROLOGY - M1988112 (2)

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RECEIVED Battle Mountain Resources,Inc. APR 212020 San Luis Project P.O. Box 310 DIVISION OF San Luis,Colorado 81152-0310 MIONOFRECLAMATION C (719)379-0798 April 9,2020 Mr. Lucas J. West State of Colorado Colorado Department of Reclamation, Mining,& Safety 1313 Sherman Street, Room 215 Denver,CO 80203 Re: Battle Mountain Resources, Inc. San Luis Project- M-88-112 March 2020 Monthly Report Dear Mr. West: The following summarizes monitoring and site activities at the Battle Mountain Resources Inc. (BMRI) "San Luis Project" (M-88-112) for the month of March 2020. Surface and groundwater monitoring and analysis were completed for all the required sites during the month as specified in the TR-32 Quality Assurance and Quality Control (QA/QC) Plan. The end of March water level, piezometer, lysimeter and other observation data was not collected until the first week in April due requirements for employee quarantines due to COVID-19. Tailing Facility/Leak Detection System The six lysimeters which are a part of the Lined Tailing Facility(LTF)leak detection system were inspected and verified for proper vacuum and operation. As shown in Table 1,there was no pore space water found to be present in any of the six lysimeter collection pans,therefore, no sampling or laboratory analysis was required. Table 1 —Monthly Lysimeter Monitoring Lysimeter Identification Observation Date Depth to Water(feet) LS 1 R2 04/02/2020 DRY LS2R2 04/02/2020 DRY LS3R 04/02/2020 DRY LD1 R2 04/02/2020 DRY LD2R2 04/02/2020 DRY LD3R 04/02/2020 DRY The ten piezometers located on the tailing impoundment main embankment were inspected and measured for depth to water. The depths to water found for each piezometer are shown in Table 2. All piezometers were either dry or contained less than twelve inches of water.