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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 04/30/2020 72.46 DRY N/A <br /> P7 04/30/2020 92.50 92.29 0.21 <br /> P8 04/30/2020 97.51 96.67 0.84 <br /> P9 04/30/2020 72.30 71.89 0.41 <br /> P10 04/30/2020 58.30 57.55 0.75 <br /> I'll 04/30/2020 41.80 41.39 0.41 <br /> P12 04/30/2020 41.71 41.68 0.03 <br /> P13 04/30/2020 41.34 41.04 0.30 <br /> P14 1 04/30/2020 41.24 DRY N/A <br /> P15 1 04/30/2020 1 41.10 40.87 0.23 <br /> The leak detection system at the LTF Collection Pond was inspected April 30, 2020 and 840 gallons were <br /> evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was visually <br /> inspected April 30, 2020 and the flow rate was measured to be approximately 33.5 gallons per minute <br /> (gpm)• <br /> West Pit Waste Water Treatment Plant <br /> During the month of April 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 7,245,200 gallons (22.2 acre-feet) of treated water into the Rito Seco alluvial aquifer. <br /> Additionally,388,100 gallons(L 19 acre-feet)of water was transferred from the West Pit to the LTF. There <br /> was no sludge transferred from the WWTP drying pad to the LTF. <br /> BMRI performed the monthly visual seepage expression inspections on April 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 04/30/2020 24.96 <br /> BF-5R 04/30/2020 30.85 <br /> BF-6 04/30/2020 30.98 <br /> M-6 04/30/2020 DRY <br /> M-7 04/30/2020 DRY <br /> M-8 04/30/2020 DRY <br /> M-9 04/30/2020 141.64 <br /> M-10 04/30/2020 25.09 <br /> M-11 R 04/30/2020 38.22 <br /> M-12 04/30/2020 174.85 <br /> M-13R 04/30/2020 125.93 <br /> M-14 04/30/2020 131.02 <br /> M-16 04/30/2020 22.98 <br /> M-17 04/30/2020 29.58 <br /> M-18 1 04/30/2020 26.55 <br />