Laserfiche WebLink
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 04/27/2022 72.46 DRY N/A <br /> P7 04/27/2022 92.50 92.29 0.21 <br /> P8 04/27/2022 97.51 96.58 0.93 <br /> P9 04/27/2022 72.30 71.93 0.37 <br /> P10 04/27/2022 58.30 57.47 0.83 <br /> I'll 04/27/2022 41.80 41.40 0.40 <br /> P12 04/27/2022 41.71 41.66 0.05 <br /> P 13 04/27/2022 41.34 41.02 0.32 <br /> P 14 04/27/2022 41.24 DRY N/A <br /> P15 1 04/27/2022 41.10 1 40.87 0.23 <br /> The leak detection system at the LTF Collection Pond was inspected April 27, 2022 and 840 gallons were <br /> evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was visually <br /> inspected April 27, 2022 and the flow rate was measured to be approximately 32.0 gallons per minute <br /> (gPm)• <br /> West Pit Waste Water Treatment Plant <br /> During the month of April 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, 6,329,500 gallons (19.4 acre-feet) of treated water was discharged to the Rito Seco and 358,000 <br /> gallons (1.10 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 April. <br /> BMRI performed the monthly visual seepage expression inspections on April 28, 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 04/28/2022 24.80 <br /> BF-5R 04/28/2022 30.73 <br /> BF-6 04/28/2022 30.85 <br /> M-6 04/28/2022 DRY <br /> M-7 04/28/2022 DRY <br /> M-8 04/28/2022 DRY <br /> M-9 04/28/2022 141.35 <br /> M-10 04/28/2022 24.37 <br /> M-11 R 04/28/2022 39.27 <br /> M-12 04/28/2022 174.39 <br /> M-13R 04/28/2022 125.61 <br /> M-14 04/28/2022 130.46 <br /> M-16 04/28/2022 23.17 <br /> M-17 04/28/2022 29.92 <br />