Laserfiche WebLink
Table 2-Monthly Piezometer Elevations <br /> Monitoring Well ate Piezometer Depth Depth to Water Depth of Water <br /> Identification Observation D fr ft ft <br /> P6 03/30/2023 72.46 DRY N/A <br /> P7 03/30/2023 92.50 DRY N/A <br /> P8 03/30/2023 97.51 96.67 0.84 <br /> P9 03/30/2023 72.30 71.95 0.35 <br /> P10 03/30/2023 58.30 57.47 0.83 <br /> Pl 1 03/30/2023 41.80 41.40 0.40 <br /> P12 03/30/2023 41.71 41.63 0.08 <br /> P13 03/30/2023 41.34 41.02 0.32 <br /> P14 1 03/30/2023 1 41.24 1 DRY N/A <br /> P15 1 03/30/2023 1 41.10 1 40.85 0.25 <br /> The leak detection system at the LTF Collection Pond was inspected March 30,2023 and 880 gallons were <br /> evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was visually <br /> inspected March 30, 2023 and the flow rate was measured to be approximately 31.5 gallons per minute <br /> (gpm)• <br /> West Pit Waste Water Treatment Plant <br /> During the month of March 2023, 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) CUPS Permit No. C00045675 for discharge into the Rito Seco alluvial aquifer. During the <br /> month, 7,252,800 gallons (22.3 acre-feet) of treated water was discharged to the Rito Seco and 421,800 <br /> gallons (1.29 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 March. <br /> BMRI performed the monthly visual seepage expression inspections on March 22, 2023 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 /> BF4 03/30/2023 24.89 <br /> BF-511 03/30/2023 30.80 <br /> BF-6 03/30/2023 30.91 <br /> M-6 03/30/2023 DRY <br /> M-7 03/30/2023 DRY <br /> M-8 03/30/2023 DRY <br /> M-9 03/30/2023 141.10 <br /> M-10 03/30/2023 24.35 <br /> M-11R 03/30/2023 39.81 <br /> M-12 03/30/2023 174.14 <br /> M-13R 03/30/2023 125.38 <br /> M-14 03/30/2023 130.23 <br /> M-16 03/30/2023 23.01 <br /> M-17 03/30/2023 30.18 <br />