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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 06/30/2022 72.46 DRY N/A <br /> P7 06/30/2022 92.50 92.30 0.20 <br /> P8 06/30/2022 97.51 96.62 0.89 <br /> P9 06/30/2022 72.30 71.93 0.37 <br /> 1,10 06/30/2022 58.30 57.48 0.82 <br /> Pll 06/30/2022 41.80 41.41 0.39 <br /> P12 06/30/2022 41.71 41.65 0.06 <br /> P13 06/30/2022 41.34 41.01 0.33 <br /> P14 06/30/2022 41.24 DRY N/A <br /> P15 06/30/2022 41.10 40.87 0.23 <br /> The leak detection system at the LTF Collection Pond was inspected June 30, 2022 and 890 gallons were <br /> evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was visually <br /> inspected June 30,2022 and the flow rate was measured to be approximately 32.0 gallons per minute(gpm). <br /> West Pit Waste Water Treatment Plant <br /> During the month of June 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, 8,090,700 gallons (24.8 acre-feet) of treated water was discharged to the Rito Seco and 410,200 <br /> gallons (1.26 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 June. <br /> BMRI performed the monthly visual seepage expression inspections on June 30, 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 /> BMR1 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 06/30/2022 24.85 <br /> BF-5R 06/30/2022 30.79 <br /> BF-6 06/30/2022 30.91 <br /> M-6 06/30/2022 DRY <br /> M-7 06/30/2022 DRY <br /> M-8 06/30/2022 DRY <br /> M-9 06/30/2022 141.33 <br /> M-10 06/30/2022 24.52 <br /> M-11 R 06/30/2022 39.00 <br /> M-12 06/30/2022 174.43 <br /> M-13R 06/30/2022 125.70 <br /> M-14 06/30/2022 130.54 <br /> M-16 06/30/2022 22.80 <br /> M-17 06/30/2022 29.86 <br />