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Table 2-Monthly Piezometer Elevations <br /> Monitoring Well Piezometer Depth Depth to Water Depth of Water <br /> Identification Observation Date 11 ft ft <br /> P6 01/31/2022 72.46 DRY N/A <br /> P7 01/31/2022 92.50 92.29 0.21 <br /> P8 01/31/2022 97.51 96.58 0.93 <br /> P9 01/31/2022 72.30 71.93 0.37 <br /> 1310 01/31/2022 58.30 57.51 0.79 <br /> Pl 1 01/31/2022 41.80 41.40 0.40 <br /> P 12 01/31/2022 41.71 41.65 0.06 <br /> P 13 01/31/2022 41.34 41.02 0.32 <br /> P14 01/31/2022 1 41.24 1 DRY N/A <br /> P15 01/31/2022 1 41.10 1 40.87 0.23 <br /> The leak detection system at the LTF Collection Pond was inspected January 31, 2022 and 910 gallons <br /> were evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was <br /> visually inspected January 31, 2022 and the flow rate was measured to be approximately 28.4 gallons per <br /> minute(gpm). <br /> West Pit Waste Water Treatment Plant <br /> During the month of January 2022, 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, 6,593,500 gallons (20.2 acre-feet) of treated water was discharged to the Rito Seco and 287,600 <br /> gallons (0.88 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 in January. <br /> BMRI performed the monthly visual seepage expression inspections on January 31, 2022 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 01/31/2022 24.90 <br /> BF-5R 01/31/2022 30.83 <br /> BF-6 01/31/2022 30.96 <br /> M-6 01/31/2022 DRY <br /> M-7 01/31/2022 DRY <br /> M-8 01/31/2022 DRY <br /> M-9 01/31/2022 141.21 <br /> M-10 01/31/2022 24.40 <br /> M-11 R 01/31/2022 38.71 <br /> M-12 01/31/2022 174.30 <br /> M-13R 01/31/2022 125.51 <br /> M-14 01/31/2022 130.34 <br /> M-16 01/31/2022 23.80 <br /> M-17 01/31/2022 30.29 <br />