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r r r r rr r� � r r r r r Ir r r rr r� ■r rr <br /> Figure 6. MW-7 Well Completion, Depth to Groundwater, and Water Quality <br /> • MW-7 completed within sandstone and shale bedrock <br /> • Greater contribution of water from shale with greater depth to groundwater <br /> • Groundwater in shale may have different composition than in overlying sandstone <br /> M W-7 <br /> Sodium and Sulfate versus Depth to <br /> (U Cased Groundwater <br /> p -- Interval 350 2500 <br /> 0 0-42 ft bgs 300 0 ! <br /> 2000 <br /> V) O 250 <br /> Screened E 200 1500 E <br /> Interval E <br /> 17-42 ft bgs o 150 1000 <br /> e N <br /> 100 <br /> N 500 <br /> 50 <br /> 0 # 0 <br /> s O u Silica Sand 22 23 24 25 26 <br /> Ln <br /> O Backfill Depth to Groundwater(feet) <br /> rn 42-70 ft bgs <br /> Sodium ♦Sulfate <br /> ARCADIS <br />