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k <br /> T&T Trucking -3- May 6, 2010 <br /> Claim No. 10934 <br /> Ili <br /> B. In-Situ Soil/ Groundwater Remediation: pf, <br /> '" • '_METHOD. soil vapor.extraction and air sparging <br /> • DURATION: Apr 08 through present <br /> • INITIAL INFLUENT TPH-G CONENTRATION:; 816.ppmv <br /> • CURRENT INFLUENT TPH-G CONENTRATION , 101 ppmv. - <br /> • MASS OF TPH-G REMOVED: 6;173 pounds (Mar 2010),;°'- <br /> C. <br /> 010)°;°'C. Groundwater Trends: <br /> • MTBE-trends are shown below - ti <br /> 'a METHYL-TERT,BljTSYL ETHER (MTBE)'Results for MW1 <br /> - <br /> c <br /> r <br /> —' 100000 .afAli <br /> .430006- <br /> '20'0'00 <br /> 00020'00 4 <br /> } �nx s EMETJ IYL TERT BUTY1�iETHER <br /> Vll. SENSITIVE RECEPTOR SURVEY: seven wells identified within.'/2 mile of the site <br /> ` Vlll. COMMENTS AND JUSTIFICATION FOR RECOMMENDED-ACTION <br /> A. Site Description: former truck service station <br /> B. Site History: the extent of groundwater contamination is defined <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> tD. Remediation Summary: soil vapor extraction and air sparging are underway <br /> j E. Contaminant Exposure Pathway Evaluation: unknown <br /> {I F. Recommendation: <br /> In May 2008, the Fund made the following.recommendation, that the San <br /> k Joaquin County.LOP should direct the Responsible Party to implement active <br /> remediation to achieve Water Quality Objectives in a timely manner. The Fund <br /> ` concurs with this action and'will review this site next year to track progress. <br /> California En vironmenhd Protection Agency <br /> { Ca Recycled Paper <br />