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Tuleburg Warehouse " -4- April 30, 2009 NQ <br /> Claim No. 12586 <br /> D. Groundwater Trends: <br /> MTBE trends are shown below <br /> METHYL-TERT-BUTYL ETHER (MTBE) Results for MW12 <br /> 3000 f 60 <br /> li 62 <br /> 2500 - — -- S€€ — --- -- 64 <br /> 2000 ---- .., fifi= _ _ <br /> J _ 68 a <br /> C7 d? <br /> 1500 - <br /> 7D <br /> w 72 <br /> 00, <br /> 1000 ----- — --- 74 <br /> 76 <br /> 500 78 <br /> = 80 <br /> METHYL-TERT-BUTYL ETHER (MTBE) - Depth to Water <br /> VII. SENSITIVE RECEPTOR SURVEY: ten wells identified within '/2 mile of the site <br /> Vlll. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: former gasoline station <br /> B. Site History: the extent of groundwater contamination is defined <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> D. Remediation Summary: soil vapor and groundwater extraction <br /> E. Contaminant Exposure Pathway Evaluation: unknown ' <br /> F. Recommendation: <br /> In May 2008, the Fund made the following recommendation: The Fund concurs <br /> with the San Joaquin County LOP that the existing treatment systems continue to <br /> operate to achieve Water Quality Objectives in a timely manner. The Fund will <br /> review this site next year to track progress. <br /> UPDATED, May 2009: This site has been under investigation for 11 years. The <br /> San Joaquin County LOP directed the Responsible Party to conduct rebound <br /> testing. The Fund concurs and will review this site next year to track progress. <br /> Kirk La on, P.G. Date . obert Trommer, C.H.G. Date <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663 (916) 341-5684 <br /> California Environmental Protection Agency <br /> ro <br /> P„'*Recyded Paper <br />