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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 10/31/2022 72.46 DRY N/A <br /> P7 10/31/2022 92.50 DRY N/A <br /> P8 10/31/2022 97.51 96.64 0.87 <br /> P9 10/31/2022 72.30 71.92 0.38 <br /> P 10 10/31/2022 58.30 57.48 0.82 <br /> P11 10/31/2022 41.80 41.39 0.41 <br /> P12 10/31/2022 41.71 41.65 0.06 <br /> P13 10/31/2022 41.34 41.00 0.34 <br /> P14 10/31/2022 41.24 DRY N/A <br /> �__I`15 1 10/31/2022 41.10 40.86 0.24 <br /> The leak detection system at the LTF Collection Pond was inspected October 31, 2022 and 850 gallons <br /> were evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was <br /> visually inspected October 31, 2022 and the flow rate was measured to be approximately 32.5 gallons per <br /> minute(gpm). <br /> West Pit Waste Water Treatment Plant <br /> During the month of October 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, 8,808,700 gallons (27.0 acre-feet) of treated water was discharged to the Rito Seco and 377,000 <br /> gallons (1.16 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 October. <br /> BMRI performed the monthly visual seepage expression inspections on October 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 10/31/2022 24.82 <br /> BF-511 10/31/2022 30.81 <br /> BF-6 10/31/2022 30.86 <br /> M-6 10/31/2022 DRY <br /> M-7 10/31/2022 DRY <br /> M-8 10/31/2022 DRY <br /> M-9 10/31/2022 141.25 <br /> M-10 10/31/2022 24.14 <br /> M-11 R 10/31/2022 38.59 <br /> M-12 10/31/2022 174.41 <br /> M-13R 10/31/2022 125.48 <br /> M-14 10/31/2022 130.48 <br /> M-16 10/31/2022 21.34 <br /> M-17 10/31/2022 28.89 <br />