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V <br /> Advanced <br /> GeoEnvironmental, Inc . - - <br /> 30 August 2011 <br /> AGE-NC Project No. 97-0312 <br /> Mr. Mike Infurna L(s <br /> San Joaquin County Environmental Health Department We <br /> 600 East Main Street <br /> Stockton, California 95202 <br /> Subject: Site Closure Feasibility <br /> CHEROKEE TRUCK STOP <br /> 3535 East Cherokee Road, Stockton, California <br /> Dear Mr. Infurna: <br /> At the request of Mr. Ellis Cecchini,Advanced GeoEnvironmental,Inc.(AGE)has prepared <br /> this request for site closure feasibility for 3535 Cherokee Road, Stockton, California. <br /> AGE prepared the High Vacuum Soil Vapor Extraction Pilot Test Report, dated 10 March <br /> 2010; within this report which documented a field scale pilot test to evaluate high vacuum <br /> soil vapor extraction (SVE) feasibility and AGE's recommended active remediation. <br /> However, at the recommendation of the San Joaquin County Environmental Health <br /> Department (EHD) letter dated 27 October 2010, an extended high vacuum soil vapor <br /> extraction pilot test will be conducted utilizing the approved technology and monitoring <br /> program.AGE prepared the Five-Day High Vacuum Soil Vapor Extraction Pilot Test Report <br /> date 21 March 2011 and again the report included AGE's recommended active <br /> remediation. The mass of SVE hydrocarbons extracted during the first 8-hour SVE pilot <br /> test was calculated to be 40 pounds of gasoline (6 gallons); while hydrocarbon mass <br /> extracted during the longer-duration SVE pilot test was calculated to be 410 pounds of <br /> gasoline (65.63 gallons) and 39.63 lbs of diesel. The mass of hydrocarbons slightly <br /> declined over the hours of a 90 hour, subsequent pilot test. <br /> AGE's report previously recommended preparation of a Remedial Action Work Plan <br /> (RAWP), proposing HVSVE as the remediation technology for vadose zone and deeper <br /> hydrocarbon-impacted soils which directly pose a threat to ground water at the site. An <br /> evaluation of potential corrective action alternatives to mitigate residual low concentration <br /> impact to ground water at the site was also to be included in the RAWP. <br /> 837 Shaw Road, Stockton,California 95215 <br /> Telephone(209)467-1006 Fax (209)467-11 18 <br />