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Table 2 -Monthly Piezometer Elevations <br /> Monitoring Well t Piezometer Depth Depth to Water Depth of Water <br /> Identification Observation Dae 11 ft 11 <br /> P6 08/31/2021 72.46 DRY N/A <br /> P7 08/31/2021 92.50 92.28 0.22 <br /> P8 08/31/2021 97.51 96.57 0.94 <br /> P9 08/31/2021 72.30 71.91 0.39 <br /> P 10 08/31/2021 58.30 57.60 0.70 <br /> P i 1 08/31/2021 41.80 41.40 0.40 <br /> P12 08/31/2021 41.71 41.67 0.04 <br /> P13 08/31/2021 41.34 41.02 0.32 <br /> P14 08/31/2021 41.24 DRY N/A <br /> P15 08/31/2021 41.10 1 40.87 1 0.23 <br /> The leak detection system at the LTF Collection Pond was inspected August 31,2021 and 870 gallons were <br /> evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was visually <br /> inspected August 31, 2021 and the flow rate was measured to be approximately 31.0 gallons per minute <br /> (gpm)• <br /> West Pit Waste Water Treatment Plant <br /> During the month of August 2021, the West Pit Waste Water Treatment Plant (WWTP) was operated <br /> intermittently (3 to 4 days per week) under Colorado Department of Public Health and Environment <br /> (CDPHE) CDPS Permit No. C00045675 for discharge into the Rito Seco alluvial aquifer. During the <br /> month, 7,932,900 gallons (24.3 acre-feet) of treated water was discharged to the Rito Seco and 582,900 <br /> gallons (1.79 acre-feet) of water was transferred from the West Pit to the Lined Tailing Facility (LTF). <br /> Additionally,no water was reinfiltrated into the West Pit and there was 405 cubic yards of sludge transferred <br /> from the WWTP drying pad to the LTF. <br /> BMRI performed the monthly visual seepage expression inspections on August 31, 2021 in the historic <br /> seepage area identified in Figure 2 of the permit. No seepage expressions were observed in the historic <br /> seepage area. <br /> BMRI measured the monthly West Pit backfill, alluvial and monitoring wells as required under in the <br /> QA/QC Plan. Measurements obtained for the monthly wells are shown in Table 3. <br /> Table 3 -Monthly and Quarterly Groundwater Depth to Water <br /> Monitoring Well Identification Observation Date Depth to Water <br /> 1Ft <br /> BF-4 08/31/2021 24.92 <br /> BF-511 08/31/2021 30.84 <br /> BF-6 08/31/2021 30.97 <br /> M-6 08/31/2021 DRY <br /> M-7 08/31/2021 DRY <br /> M-8 08/31/2021 DRY <br /> M-9 08/31/2021 141.36 <br /> M-10 08/31/2021 24.60 <br /> M-11 R 08/31/2021 38.08 <br /> M-12 08/31/2021 174.51 <br /> M-13R 08/31/2021 125.70 <br /> M-14 08/31/2021 130.53 <br /> M-16 08/31/2021 23.21 <br /> M-17 08/31/2021 30.22 <br />