Laserfiche WebLink
Table 2-Monthly Piezometer Elevations <br /> Monitoring Well Piezometer Depth Depth to Water Depth of Water <br /> Identification Observation Date R R ft <br /> P6 08/31/2022 72.46 DRY N/A <br /> P7 08/31/2022 92.50 DRY N/A <br /> P8 08/31/2022 97.51 96.65 0.86 <br /> P9 08/31/2022 72.30 71.93 0.37 <br /> P10 08/31/2022 58.30 57.49 0.81 <br /> I'll 08/31/2022 41.80 41.40 0.40 <br /> P12 08/31/2022 41.71 41.65 0.06 <br /> P13 08/31/2022 41.34 41.00 0.34 <br /> P 14 1 08/31/2022 41.24 DRY N/A <br /> P 15 1 08/31/2022 41.10 40.86 0.24 <br /> The leak detection system at the LTF Collection Pond was inspected August 31,2022 and 870 gallons were <br /> evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was visually <br /> inspected August 31, 2022 and the flow rate was measured to be approximately 32.5 gallons per minute <br /> (gpm)• <br /> West Pit Waste Water Treatment Plant <br /> During the month of August 2022, 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, 9,676,000 gallons (29.7 acre-feet) of treated water was discharged to the Rito Seco and 762,500 <br /> gallons (2.34 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 in August. <br /> BMRI performed the monthly visual seepage expression inspections on August 31, 2022 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 08/31/2022 24.90 <br /> BF-511 08/31/2022 30.79 <br /> BF-6 08/31/2022 30.89 <br /> M-6 08/31/2022 DRY <br /> M-7 08/31/2022 DRY <br /> M-8 08/31/2022 DRY <br /> M-9 08/31/2022 141.38 <br /> M-10 08/31/2022 24.21 <br /> M-11 R 08/31/2022 38.43 <br /> M-12 08/31/2022 174.47 <br /> M-13R 08/31/2022 125.73 <br /> M-14 08/31/2022 130.58 <br /> M-16 08/31/2022 21.84 <br /> M-17 08/31/2022 29.14 <br />