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Table 2-Monthly Piezometer Elevations <br /> Monitoring Well Piezometer Depth Depth to Water Depth of Water <br /> Identification Observation Date ft ft ft <br /> P6 01/28/2021 72.46 DRY N/A <br /> P7 01/28/2021 92.50 92.30 0.20 <br /> P8 01/28/2021 97.51 96.65 0.86 <br /> P9 01/28/2021 72.30 71.90 0.40 <br /> P 10 01/28/2021 58.30 57.62 0.68 <br /> I'll 01/28/2021 41.80 41.41 0.39 <br /> P 12 01/28/2021 41.71 41.66 0.05 <br /> P13 01/28/2021 41.34 40.99 0.35 <br /> P14 01/28/2021 41.24 DRY N/A <br /> P 15 01/28/2021 41.10 40.86 0.24 <br /> The leak detection system at the LTF Collection Pond was inspected January 28, 2021 and 880 gallons <br /> were evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was <br /> visually inspected January 28, 2021 and the flow rate was measured to be approximately 29.5 gallons per <br /> minute(gpm). <br /> West Pit Waste Water Treatment Plant <br /> During the month of January 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, 6,028,700 gallons (18.5 acre-feet) of treated water was discharged to the Rito Seco and 349,600 <br /> gallons (1.07 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 no sludge transferred from the <br /> WWTP drying pad to the LTF. <br /> BMRI performed the monthly visual seepage expression inspections on January 28, 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 /> ft <br /> BF-4 01/28/2021 24.97 <br /> BF-5R 01/28/2021 30.83 <br /> BF-6 01/28/2021 30.98 <br /> M-6 01/28/2021 DRY <br /> M-7 01/28/2021 DRY <br /> M-8 01/28/202 l DRY <br /> M-9 01/28/2021 141.63 <br /> M-10 01/28/2021 24.25 <br /> M-11 R 01/28/2021 38.14 <br /> M-12 01/28/2021 174.90 <br /> M-13R 01/28/2021 126.10 <br /> M-14 01/28/2021 131.17 <br /> M-16 01/28/2021 24.19 <br /> M-17 01/28/2021 30.33 <br />