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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 07/30/2020 72.46 DRY N/A <br /> P7 07/30/2020 92.50 92.29 0.21 <br /> P8 07/30/2020 97.51 96.69 0.82 <br /> P9 07/30/2020 72.30 71.88 0.42 <br /> P10 07/30/2020 58.30 57.55 0.75 <br /> PH 07/30/2020 41.80 41.39 0.41 <br /> P12 07/30/2020 41.71 41.68 0.03 <br /> P13 07/30/2020 41.34 41.03 0.31 <br /> P14 07/30/2020 41.24 DRY N/A <br /> P15 07/30/2020 41.10 40.86 0.24 <br /> The leak detection system at the LTF Collection Pond was inspected July 30, 2020 and 910 gallons were <br /> evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was visually <br /> inspected July 30,2020 and the flow rate was measured to be approximately 32.5 gallons per minute(gpm). <br /> West Pit Waste Water Treatment Plant <br /> During the month of July 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 6,966,300 gallons (21.4 acre-feet) of treated water into the Rito Seco alluvial aquifer and <br /> 445,000 gallons(1.37 acre-feet)water was transferred from the West Pit to the LTF. There was no sludge <br /> transferred from the WWTP drying pad to the LTF. <br /> BMRI performed the monthly visual seepage expression inspections on July 30,2020 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 07/30/2020 24.97 <br /> BF-5R 07/30/2020 30.84 <br /> BF-6 07/30/2020 30.97 <br /> M-6 07/30/2020 DRY <br /> M-7 07/30/2020 DRY <br /> M-8 07/30/2020 DRY <br /> M-9 07/30/2020 141.52 <br /> M-10 07/30/2020 25.02 <br /> M-1111 07/30/2020 37.89 <br /> M-12 07/30/2020 175.07 <br /> M-13R 07/30/2020 125.82 <br /> M-14 07/30/2020 130.98 <br /> M-16 07/30/2020 22.88 <br /> M-17 07/30/2020 30.55 <br /> M-18 07/30/2020 26.80 <br />