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n <br /> 02 Jun6 1998 <br /> AGE-NC Project No. 95-0104 <br /> Page 2 of 2 <br /> 2. Three of the`drowned' ground water monitoring wells currently on site and within the impacted <br /> ground water plume can be adapted for use as air sparging wells; <br /> 3. Immediate initiation of the SVE/AS pilot test will provide some degree of immediate relief and <br /> protection for the endangered drinking water wells; <br /> 4. As the test progresses,the system can be fine tuned to more effectively address impacted soil and/or <br /> ground water. <br /> A six-month SVE/AS pilot test is recommended at this time to determine the effectiveness of this remedial <br /> alternative for the site and to provide immediate protection to the nearby drinking water wells. Since <br /> hydrocarbon-impacted soil in the vadose zone appears to be limited to the area directly beneath the former <br /> UST cavity at the site, a six-month SVE/AS pilot test may provide enough effective remediation such that <br /> no additional active remediation in the hydrocarbon-impacted vadose zone may be necessary. <br /> Upon completion of the six-month SVE,'AS pilot test, a report should be prepared to evaluate the remedial <br /> progress of the pilot study. It is at this time that the necessity for any additional remedial alternatives for <br /> hydrocarbon-impacted ground water at the site should be considered. <br /> If you have any questions or comments, please contact our office at(209)467-1006. <br /> Sincerely, %SD G��� <br /> Advanced GeoEnvironmental, Inc. *C* 4E?.DFg�p <br /> ru <br /> � � N <br /> No. 5337 ' <br /> N <br /> Timothy J. Cue] arr Nuel C. Henderson, Jr. <br /> Staff Geologist Senior Project Geologist <br /> California Registered Geologist No. 5837 <br /> cc: Mr. Jonathan Marlowe <br /> Adranced GcoEnircmmental,Inc. <br />