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Table 2-Monthly Piezometer Elevations <br /> Monitoring Well Piezometer Depth Depth to Water Depth of Water <br /> Identification Observation Date B R ft <br /> P6 07/28/2022 72.46 DRY N/A <br /> P7 07/28/2022 92.50 92.30 0.20 <br /> P8 07/28/2022 97.51 96.65 0.86 <br /> P9 07/28/2022 72.30 71.94 0.36 <br /> P10 07/28/2022 58.30 57.49 0.81 <br /> I'll 07/28/2022 41.80 41.41 0.39 <br /> P12 07/28/2022 41.71 41.65 0.06 <br /> P13 07/28/2022 41.34 41.01 0.33 <br /> P14 07/28/2022 41.24 DRY N/A <br /> P15 07/28/2022 41.10 40.87 0.23 <br /> The leak detection system at the LTF Collection Pond was inspected July 28, 2022 and 880 gallons were <br /> evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was visually <br /> inspected July 28,2022 and the flow rate was measured to be approximately 33.0 gallons per minute(gpm). <br /> West Pit Waste Water Treatment Plant <br /> During the month of July 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, 7,455,200 gallons (22.9 acre-feet) of treated water was discharged to the Rito Seco and 395,000 <br /> gallons (1.21 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 July. <br /> BMRI performed the monthly visual seepage expression inspections on July 28,2022 in the historic seepage <br /> area identified in Figure 2 of the permit. No seepage expressions were observed in the historic seepage <br /> 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 07/28/2022 24.90 <br /> BF-511 07/28/2022 30.83 <br /> BF-6 07/28/2022 30.97 <br /> M-6 07/28/2022 DRY <br /> M-7 07/28/2022 DRY <br /> M-8 07/28/2022 DRY <br /> M-9 07/28/2022 141.42 <br /> M-10 07/28/2022 24.32 <br /> M-11 R 07/28/2022 38.61 <br /> M-12 07/28/2022 174.57 <br /> M-13R 07/28/2022 125.79 <br /> M-14 07/28/2022 130.60 <br /> M-16 07/28/2022 22.96 <br /> M-17 07/28/2022 30.10 <br />