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Table 2 - Monthly Piezometer Elevations <br />Monitoring Well <br />Identification <br />Observation Date <br />Piezometer Depth <br />(ft) <br />Depth to Water <br />ft <br />Depth of Water <br />ft <br />P6 <br />07/31/2018 <br />72.46 <br />DRY <br />N/A <br />P7 <br />07/31/2018 <br />92.50 <br />92.28 <br />0.22 <br />P8 <br />07/31/2018 <br />97.51 <br />96.58 <br />0.93 <br />P9 <br />07/31/2018 <br />72.30 <br />71.96 <br />0.34 <br />P10 <br />07/31/2018 <br />58.30 <br />57.57 <br />0.73 <br />Pl l <br />07/31/2018 <br />41.80 <br />41.38 <br />0.42 <br />P12 <br />07/31/2018 <br />41.71 <br />41.68 <br />0.03 <br />P13 <br />07/31/2018 <br />41.34 <br />41.04 <br />0.30 <br />P14 <br />07/31/2018 <br />41.24 <br />DRY <br />N/A <br />P15 <br />07/31/2018 <br />41.10 1 <br />40.86 <br />1 0.24 <br />The leak detection system at the TSF Collection Pond was inspected July 31, 2018. A total of 860 gallons <br />(26.1 GPD) were evacuated from the leak detection system and pumped to the LTF. The LTF underdrain <br />system flow was measured to be approximately 3 3. 0 gallons per minute (gpm). <br />West Pit Waste Water Treatment Plant <br />During the month of July 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 July, 7,514,300 gallons (23.06 acre-feet) of treated <br />water was discharged to the Rito Seco. There was 305,700 gallons (0.94 acre-feet) of water transferred <br />from the West Pit to the LTF in July 2018. There was no sludge transferred from the water treatment plant <br />drying pad to the LTF. <br />BMRI performed the monthly visual seepage expression inspections on July 31, 2018 in the historic seepage <br />area identified in Figure 2 of the permit. No seepage expressions were observed in the historic seepage <br />area during July 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 <br />Observation Date <br />Depth to Water <br />ft <br />BF -4 <br />07/31/2018 <br />24.93 <br />BF -5R <br />07/31/2018 <br />30.82 <br />BF -6 <br />07/31/2018 <br />30.93 <br />M-6 <br />07/31/2018 <br />DRY <br />M-7 <br />07/31/2018 <br />DRY <br />M-8 <br />07/31/2018 <br />DRY <br />M-9 <br />07/31/2018 <br />141.59 <br />M-10 <br />07/31/2018 <br />26.16 <br />M -11R <br />07/31/2018 <br />39.34 <br />M-12 <br />07/31/2018 <br />175.03 <br />M -13R <br />07/31/2018 <br />125.97 <br />M-14 <br />07/31/2018 <br />131.11 <br />M-15 <br />07/31/2018 <br />92.56 <br />M-16 <br />07/31/2018 <br />23.01 <br />M-17 <br />07/31/2018 <br />30.47 <br />M-18 <br />07/31/2018 <br />26.70 <br />