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. 08 October 1997 AGE-NC Project No 95-0128 Page 8 of 8 be collected at approximately two-hour intervals The samples will be collected in Tedlar bags and stored in a cool container and transported under chain-of-custody to a state-certified laboratory for analysis 5 Each vapor sample will be analyzed for TPH-g, TPH-d, BTE&X and MTBE, TBA, DIPE, ETBE, TAME in accordance with the appropriate EPA methods 6 A compressor-driven unit will be used to inject air at a minimum of 15 pounds per square inch (PSI) into the subsurface using selected IAS wells 7 Parameters to be measured throughout the IAS pilot test include induced pressure at monitoring points, sparging rate(discharge rate), vapor concentrations at morutoring points, depth to ground water in surrounding wells and dissolved oxygen (DO) 8 Ground water samples will be collected from selected wells prior to initiation of the pilot study (baseline) and at the completion of the pilot study Ground water samples will be collected in 40-m1 VOA vials using a disposable plastic bailer 9 Ground water samples will be transported under chain-of-custody to a state-certified laboratory Each sample will be analyzed for analyzed for TPH-g, TPH-d, BTE&X and MTBE, TBA, DIPS, ETBE, TAME, dissolved iron and manganese concentrations in accordance with the appropriate EPA method 45 REPORTING A report detailing the results of the investigation will be prepared The report will be in a format acceptable to the PHS-EHD and CVRWQCB If appropriate, the report will be a revised Corrective Action Plan, detailing soil and ground water remedial alternatives for the site and presenting w recommendations for the most cost-effective remediation method(s) The report will be reviewed and signed by a California Registered Geologist Advanced GeoEmironmentai,Inc.