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Table 2-Monthly Piezometer Elevations <br /> Monitoring Well Piezometer Depth Depth to Water Depth of Water <br /> Obser <br /> vation Date <br /> Identification ft (It) ft <br /> P6 06/30/2020 72.46 DRY N/A <br /> P7 06/30/2020 92.50 92.29 0.21 <br /> P8 06/30/2020 97.51 96.68 0.83 <br /> P9 06/30/2020 72.30 71.89 0.41 <br /> P10 06/30/2020 58.30 57.56 0.74 <br /> 1111 06/30/2020 41.80 41.38 0.42 <br /> P12 06/30/2020 41.71 41.68 0.03 <br /> P13 06/30/2020 41.34 41.04 0.30 <br /> P14 06/30/2020 41.24 DRY N/A <br /> P15 06/30/2020 41.10 40.86 0.24 <br /> The leak detection system at the LTF Collection Pond was inspected June 30, 2020 and 860 gallons were <br /> evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was visually <br /> inspected June 30,2020 and the flow rate was measured to be approximately 36.5 gallons per minute(gpm). <br /> West Pit Waste Water Treatment Plant <br /> During the month of June 2020, the West Pit Waste Water Treatment Plant(WWTP) was operated under <br /> Colorado Department of Public Health and Environment (CDPHE) CDPS Permit No. C00045675 and <br /> discharged 7,877,900 gallons(24.2 acre-feet)of treated water into the Rito Seco alluvial aquifer. No water <br /> was transferred from the West Pit to the LTF. There was 321 cubic yards of sludge transferred from the <br /> WWTP drying pad to the LTF during the period of May 30 to June 1,2020. <br /> BMRI performed the monthly visual seepage expression inspections on June 30, 2020 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 06/30/2020 24.96 <br /> BF-5R 06/30/2020 30.84 <br /> BF-6 06/30/2020 30.98 <br /> M-6 06/30/2020 DRY <br /> M-7 06/30/2020 DRY <br /> M-8 06/30/2020 DRY <br /> M-9 06/30/2020 141.45 <br /> M-10 06/30/2020 25.33 <br /> M-11 R 06/30/2020 38.03 <br /> M-12 06/30/2020 174.74 <br /> M-13R 06/30/2020 125.81 <br /> M-14 06/30/2020 130.85 <br /> M-16 06/30/2020 22.61 <br /> M-17 06/30/2020 30.50 <br /> M-18 06/30/2020 26.75 <br />