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Proposed Groundwater Quality Limits <br /> Based on the pre-mine baseline water quality data gathered at the Ewing Gravel Pit, the <br /> following Site-Specific Numeric Protection Levels are proposed for the parameters identified <br /> below. The Site-Specific Numeric Protection Levels is based on the two-sigma (95-percentile) <br /> statistical value for the parameter sampled. <br /> Table 1. Proposed Site-Specific NPL Standards <br /> Parameter Average Two-Sigma Reg 41— Reg 41—Ag. Reg 41— Samples in <br /> (mg/L) Drinking Water Human Excess of <br /> Water Health Standards <br /> 11 0.325 1.21 0.05 0.2 N/A 9 <br /> Uranium 0.018 0.04 N/A N/A 0.03 3 <br /> Ewing Gravel Pit Lewicki&Associates <br /> April 2024 <br />