Laserfiche WebLink
Table 2-Monthly Piezometer Elevations <br /> Monitoring Well Observation Date Piezometer Depth Depth to Water Depth of Water <br /> Identification v ft ft 11 <br /> P6 11/30/2020 72.46 DRY N/A <br /> P7 11/30/2020 92.50 92.30 0.20 <br /> P8 11/30/2020 97.51 96.65 0.86 <br /> P9 11/30/2020 72.30 71.90 0.40 <br /> P10 11/30/2020 58.30 57.60 0.70 <br /> I'll 11/30/2020 41.80 41.39 0.41 <br /> P 12 11/30/2020 41.71 41.68 0.03 <br /> P 13 11/30/2020 41.34 41.02 0.32 <br /> P14 1 11/30/2020 1 41.24 1 DRY I N/A <br /> P15 1 11/30/2020 1 41.10 1 40.86 1 0.24 <br /> The leak detection system at the LTF Collection Pond was inspected November 30, 2020 and 900 gallons <br /> were evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was <br /> visually inspected November 30, 2020 and the flow rate was measured to be approximately 30.0 gallons <br /> per minute(gpm). <br /> West Pit Waste Water Treatment Plant <br /> During the month of November 2020, the West Pit Waste Water Treatment Plant (WWTP) was operated <br /> intermittently (3 to 4 days per week) under Colorado Department of Public Health and Environment <br /> (CDPHE) CDPS Permit No. C00045675 for discharge into the Rito Seco alluvial aquifer. During the <br /> month, 6,658,500 gallons (20.4 acre-feet) of treated water was discharged to the Rito Seco and 344,900 <br /> gallons (1.06 acre-feet) of water was transferred from the West Pit to the Lined Tailing Facility (LTF). <br /> Additionally, no water was reinfiltrated into the West Pit and there was no sludge transferred from the <br /> WWTP drying pad to the LTF. <br /> BMRI performed the monthly visual seepage expression inspections on November 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 /> BMRl 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 11/30/2020 24.94 <br /> BF-5R 11/30/2020 30.81 <br /> BF-6 11/30/2020 30.95 <br /> M-6 11/30/2020 DRY <br /> M-7 11/30/2020 DRY <br /> M-8 11/30/2020 DRY <br /> M-9 11/30/2020 141.55 <br /> M-10 11/30/2020 24.19 <br /> M-11 R 11/30/2020 37.41 <br /> M-12 11/30/2020 174.63 <br /> M-13R 11/30/2020 125.84 <br /> M-14 11/30/2020 130.94 <br /> M-16 11/30/2020 22.74 <br /> M-17 11/30/2020 29.65 <br />