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Table 2-Monthly Piezometer Elevations <br /> Monitoring Well Observation Date Piezometer Depth Depth to Water Depth of Water <br /> Identification ft ft (it) <br /> P6 10/31/2018 72.46 DRY N/A <br /> P7 10/31/2018 92.50 92.29 0.21 <br /> P8 10/31/2018 97.51 96.64 0.87 <br /> P9 10/31/2018 72.30 71.96 0.34 <br /> P10 10/31/2018 58.30 57.56 0.74 <br /> Pit 10/31/2018 41.80 41.39 0.41 <br /> P12 10/31/2018 41.71 41.69 0.02 <br /> P13 10/31/2018 41.34 41.04 0.30 <br /> P14 10/31/2018 1 41.24 1 DRY N/A <br /> P 15 10/31/2018 1 41.10 1 40.86 0.24 <br /> The leak detection system at the TSF Collection Pond was inspected October 31, 2018. A total of 860 <br /> gallons (25.3 GPD) were evacuated from the leak detection system and pumped to the LTF. The LTF <br /> underdrain system flow was measured to be approximately 34.5 gallons per minute (gpm) on October 25, <br /> 2018. <br /> West Pit Waste Water Treatment Plant <br /> During the month of October 2018, the West Pit Water Treatment Plant was operated under Colorado <br /> Department of Public Health and Environment(CDPHE)CDPS Permit No. C00045675 for discharge into <br /> the Rito Seco alluvial aquifer. During the month of October, 7,913,300 gallons(24.28 acre-feet) of treated <br /> water was discharged to the Rito Seco. There was 538,400 gallons (1.65 acre-feet) of water transferred <br /> from the West Pit to the LTF in October 2018. There was no sludge transferred from the water treatment <br /> plant drying pad to the LTF. The totalizer for the pump at well BF-5R was replaced on October 16, 2018 <br /> after inspection indicated the previous one was not functioning properly. <br /> BMRI performed the monthly visual seepage expression inspections on October 25, 2018 in the historic <br /> seepage area identified in Figure 2 of the permit. No seepage expressions were observed in the historic <br /> seepage area during October 2018. <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 /> (it) <br /> BF-4 10/31/2018 24.84 <br /> BF-511 10/31/2018 30.78 <br /> BF-6 10/31/2018 30.86 <br /> M-6 10/31/2018 DRY <br /> M-7 10/31/2018 DRY <br /> M-8 10/31/2018 DRY <br /> M-9 10/31/2018 141.50 <br /> M-10 10/31/2018 25.65 <br /> M-11R 10/31/2018 38.45 <br /> M-12 10/31/2018 174.80 <br /> M-13R 10/31/2018 125.72 <br />