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. 21 March 1997 AGE-NC Project No 95-0173 Page 6 of 8 4 2 WELL COMPLETION For the installation of ground water monitoring wells, SVE wells and IAS wells, the following procedures will be performed Ground water monitoring wells will be completed using 2-inch diameter PVC casing with a 20-foot screened interval Blank PVC screen (Schedule 40) will be used from surface grade to the top of a screened interval A filter pack will be installed using # 3 sand from bottom of screened depth to two feet above, and a 3-foot bentonite plug placed on top of filter pack Each well will then be backfilled to the surface utilizing a tremae method with Portland Type II cement (Figure 3) • Soil vapor extraction wells will be cluster-completed using 2-inch diameter PVC casing with a separate screened intervals Blank PVC screen (Schedule 40) will be used from surface grade to the top of a screened interval A filter pack will be installed using # 3 sand from bottom of screened depth to two feet above, and a 3-foot bentonite plug placed on top of filter pack Each well will then be backfilled utilizing a tremae method with Portland Type II cement (Figure 4) - Air sparging wells will be completed using 5/16-inch diameter Polyethylene tubing and 5-feet of 318-inch diameter stainless steel screen implant Polyethylene tubing will be used from surface grade to the top of a stainless steel screen implant A filter pack will be installed using # 3 sand from bottom of screened depth to two feet above, and a 3-foot bentonite plug placed on top of filter pack The well will then be backfilled utilizing a tremie method with Portland Type 11 cement (Figure 5) 43 GROUND WATER SAMPLE COLLECTION For the collection of ground water samples, the following procedures will be performed • Survey the top of each well casing to determine the elevation relative to existing wells • New ground water monitoring wells will be developed using a submersible pump until ground water appears to be sediment free At least three well volumes of water will be removed from each well to stabilize temperature, pH, and conductivity Ground water samples will be collected using disposable bailers and new nylon rope, samples will be collected in 40-m1 VOA vials and one-liter amber bottles • Store the samples in a chilled container and transport under chain-of-custody protocol to a . state-certified laboratory for analysis Ground water samples will be analyzed for TPH-g, TPH-d,BTEX and MTBE in accordance with EPA methods 8015M and 8020, respectively