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r Shell Oil Company. <br /> Claim No. 5036 September 2;.2010' <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume `'X <br /> B. In-Situ Soil Remediation: none identified <br /> A <br /> C. Groundwater Remediation: " <br /> • METHOD:: .groundwater extraction <br /> • . DURATION: Sep 05 through Nov 09 <br /> • GROUNDWATER EXTRACTED: 16.1,514 gallons � <br /> • MASS_REMOVED: 18.5 pounds of TBA. <br /> D. Groundwater Trends: 'TBA trends are shown below, source area. <br /> TERT-BUTYL ALCOHOL'(TBA) F2esulfs for MW-4' - <br /> 80000 <br /> 70000---. <br /> 00000 <br /> q 50000 - <br /> ... 40000 <br /> 30000 <br /> i <br /> 20000 <br /> ..—_. <br /> 70000 -- r <br /> _..--TERT BUTYL ALCOHOL <br /> VII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION 1 <br /> A. Site Description: active retail gasoline station <br /> ( <br /> B. Site History: the extent of groundwater contamination is defined and shrinking <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> D. Remediation Summary: groundwater extraction <br /> E. Contaminant Exposure Pathway Evaluation: unknown, active station <br /> F. Recommendation: April, 2008, the Fund concurs with the San Joaquin County <br /> LOP direct that the Responsible Parry should continue to conduct groundwater <br /> extraction and to maximize the treatment system as necessary to achieve Water <br /> Quality Objectives in a timely manner. The Fund will review this site next year to <br /> track progress. <br /> I <br /> California Environmenta/Protecdon Agency <br /> P.a Recy kdFsper <br />