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Groundwater Well Installation Work Plan Sharpe Army Depot <br /> Lathrop, California <br /> Table 1. Specifications for Proposed <br /> Groundwater Extraction and Monitoring Wells <br /> Estimated Casing Estimated Length of <br /> Borehole Outside Casing and Screened Screen Well <br /> Depth Diameter Sump Interval Slot Size Screen <br /> Well (ft bgs) (inches) Material (ft bgs) Screen Material (inches) (ft) <br /> EWC6 132 8 SCH 80 PVC 112 to 122 Type 304 Stainless Steel 0.020 10 <br /> EWC7 132 8 SCH 80 PVC 112 to 122 Type 304 Stainless Steel 0.020 10 <br /> EWC8 140 8 SCH 80 PVC 120 to 130 Type 304 Stainless Steel 0.020 10 <br /> EWC9 140 8 SCH 80 PVC 120 to 130 Type 304 Stainless Steel 0.020 10 <br /> EWCC7 160 8 SCH 80 PVC 140 to 150 Type 304 Stainless Steel 0.020 10 <br /> MW549C 110 4 SCH 80 PVC 80 to 90 SCH 40 PVC 0.020 10 <br /> MW550C 110 4 SCH 80 PVC 80 to 90 SCH 40 PVC 0.020 10 <br /> MW551B 85 4 SCH 40 PVC 60 to 70 SCH 40 PVC 0.010 10 <br /> MW551C 140 4 SCH 40 PVC 115 to 125 SCH 40 PVC 0.010 10 <br /> MW552C j 135 4 SCH 40 PVC 110 to 120 SCH 40 PVC 0.010 10 <br /> Notes: <br /> bgs= below ground surface <br /> EW=extraction well <br /> ft=foot/feet <br /> MW= monitoring well <br /> PVC= polyvinyl chloride <br /> SCH =Schedule <br /> Ahtna Environmental,Inc. Page 1 of 1 <br />