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the permission of the property owners prior to the monitoring event If the gradient and flow <br /> direction cannot be uniquely determined with these additional data, it may be necessary t a increase <br /> the frequency of depth to groundwater measurements or drill additional monitor wells <br /> 4) An aquife umpxng test f GT-10 should be conducted to provide data on the ground,vater flow <br /> rate and to test`the-fear i of groundwater extraction as a potential remediation me thud We <br /> recommend performing this test in July or August 1999, prior to the third-quarter monitoring eve <br /> 5) Groundwater extracted during the aquifer test should be used to conduct a pilot test o-potential <br /> groundwater treatment systems A work plan should be prepared to test the feasibility of two <br /> systems carbon canisters and an above-ground bioreactor A portion of the water extras ed during <br /> the pumping test should be passed through each system so that the effectiveness of the s)stems can <br /> be compared and costs of full-scale remediation programs could be estimated In order to obtain <br /> regulatory approval in early July, this work plan should be submitted in early to mid-June <br /> b)Construction of a fate-and-transport model, as was requested by the regulatory agency, should be <br /> postponed until the results of items 3 and 4 have been obtained At that time, the need For such a <br /> model and the question of active vs passive remediation should be evaluated, and wher a No <br /> Further Action Required Report or a Corrective Action Plan should be prepared for regulatory <br /> review <br /> �1 <br /> • <br /> 12 <br />