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Table 2-Monthly Piezometer Elevations <br /> Monitoring Well Date Piezometer Depth Depth to Water Depth of Water <br /> Identification Observation ae ft ft ft <br /> P6 09/29/2022 72.46 DRY N/A <br /> P7 09/29/2022 92.50 DRY N/A <br /> P8 09/29/2022 97.51 96.65 0.86 <br /> P9 09/29/2022 72.30 71.93 0.37 <br /> 1310 09/29/2022 58.30 57.48 0.82 <br /> I'll 09/29/2022 41.80 41.40 0.40 <br /> P 12 09/29/2022 41.71 41.64 0.07 <br /> P13 09/29/2022 41.34 41.00 0.34 <br /> P14 1 09/29/2022 1 41.24 1 DRY N/A <br /> P15 1 09/29/2022 1 41.10 1 40.85 0.25 <br /> The leak detection system at the LTF Collection Pond was inspected September 29, 2022 and 830 gallons <br /> were evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was <br /> visually inspected September 29, 2022 and the flow rate was measured to be approximately 33.0 gallons <br /> per minute(gpm). <br /> West Pit Waste Water Treatment Plant <br /> During the month of September 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, 8,565,900 gallons (26.3 acre-feet) of treated water was discharged to the Rito Seco and 476,400 <br /> gallons (1.46 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 September. <br /> BMRI performed the monthly visual seepage expression inspections on September 29,2022 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 /> BF4 09/29/2022 24.85 <br /> BF-5R 09/29/2022 30.83 <br /> BF-6 09/29/2022 31.06 <br /> M-6 09/29/2022 DRY <br /> M-7 09/29/2022 DRY <br /> M-8 09/29/2022 DRY <br /> M-9 09/29/2022 141.44 <br /> M-10 09/29/2022 24.19 <br /> M-11 R 09/29/2022 38.57 <br /> M-12 09/29/2022 174.59 <br /> M-13R 09/29/2022 125.83 <br /> M-14 09/29/2022 130.93 <br /> M-16 09/29/2022 21.35 <br /> M-17 09/29/2022 28.97 <br />