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1 <br /> <br /> <br /> <br />1 <br /> <br />1 <br /> <br /> <br /> <br />1 <br />1 <br />1 <br />Decemhcr 23, 1999 ~ • Pnge l3 <br />Analytical Laboratory Parameters <br /> Instrument <br /> Minimum <br />Constituent Units Detection Standards <br /> Limit (IMDL) <br />Dissolved Silica mg/L 0.2 <br />Dissolved Silver mg/L 0.0002 0.05 HH <br />Dissolved Sodium mg/L 0.02 <br />Dissolved Strontium mg/L 0.01 <br />Dissolved Sulfate mg/L 0.5 250 DW <br />Dissolved Sulfide as HZS mg/L 0.02 <br />Dissolved Thallium mg/L 0.00005 0.002 HH <br />Dissolved Uranium mg/L 0.00005 <br />Dissolved Vanadium mg/L 0.005 0.1 AG <br />Dissolved Zinc mg/L 0.002 2.0 AG, 5.0 DW <br />Gross Alpha Particle Activity pCi/I 2 15 HH <br />Gross Beta Particle Activity pCi/1 4 4 mrem/year HH <br />IMDL = /nstrument Minimum Detection Limit <br />DW = Saje Drinking Water Standard <br />AG = Agricultural Standard <br />HH = Human Health Standard <br />Standards from Colorado Department aj Pubiie Neaith and Environment, Water Quality Conlro! Commission, <br />Reguiation No. ai. "The Basic Standards jot Groundwater, " <br />Groundwater Quality Monitoring Schedule <br />At the Piceance Site, schedules for groundwater sampling have been developed for the <br />baseline period and the operations period. The schedule is summarized in Table 4. <br />Table 4. Summary of Piceance Site Groundwater Quality Monitoring Schedule <br />Baseline Period <br />Monitoring (Five Quarters Prior to During First 5 Years of <br />Locations Commercial Operations) Commercial Operations <br />Wells Monthly (WQ2) Monthly (WQl), Quarterly <br /> <br /> <br />Out-of--panel Wells Monthly (WQ2) Quarterly (WQ2) <br />Domestic Wells Quarterly (for state drinking water Quarterly (for state drinking water <br />compliance) compliance) <br />Dissolution Surface Monthly (water level, Weekly (water level, conductivity, <br />Wells conductivity, and temperature) and temperature) <br />Agapito Associates, Inc. <br />