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Groundwater Well Installation Work Plan <br />Table 1. Specifications for Proposed <br />Groundwater Extraction Wells <br />Sharpe Army Depot <br />Lathrop, California <br />Well <br />Estimated <br />Borehole <br />Depth <br />(ft bgs) <br />Casing <br />Outside <br />Diameter <br />(inches) <br />Casing and <br />Sump <br />Material <br />Estimated <br />Screened <br />Interval <br />(ft bgs) Screen Material <br />Screen <br />Slot Size <br />(inches) <br />Length of <br />Well <br />Screen <br />(ft) <br />EWA1R 50 8 SCH 80 PVC 30 to 40 Type 304 Stainless Steel 0.020 10 <br />EWNC7 150 8 SCH 80 PVC 130 to 140 Type 304 Stainless Steel 0.020 10 <br />MW543B 75 4 SCH 40 PVC 60 to 70 SCH 40 PVC 0.010 10 <br />MW544B 75 4 SCH 40 PVC 60 to 70 SCH 40 PVC 0.010 10 <br />MW545B 75 4 SCH 40 PVC 60 to 70 SCH 40 PVC 0.010 10 <br />MW546C 90 4 SCH 40 PVC 75 to 85 SCH 40 PVC 0.010 10 <br />MW547C 90 4 SCH 40 PVC 75 to 85 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