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Balbir Grewal -3- March 17, 2009 <br /> Claim No. 13651 <br /> D. Groundwater Trends: <br /> • MTBE and 1,2 DCA trends are shown below: <br /> Results for MW4 <br /> 70 I _i_ _ 41 <br /> 60-- . ! 46 <br /> 50 <br /> 40 - <br /> .51 <br /> Cn <br /> � � � L <br /> 56 <br /> 20 <br /> w <br /> i s1 <br /> 10 E <br /> fl 1r. -••Rr+s� 66 <br /> METHYL-TERT-BUTYL ETHER(MTBE) au*s: 1,2-DIGHL0R0ETHANE ••pis Depth to Water <br /> VII. SENSITIVE RECEPTOR SURVEY: five wells identified within '/z mile of the site <br /> Vill. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: active.retail gasoline station <br /> B. Site History: the extent of groundwater contamination is largely defined <br /> C. Groundwater Monitoring Summary: moderate monitoring history <br /> D. Remediation Summary: none identified <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation: <br /> In April 2008, the Fund made the following recommendation: Based on the <br /> following criteria, the Fund recommends this site be considered for closure <br /> providing the potential for soil vapor migration is assessed and determined safe <br /> for prescribed site activities, public participation and fee title notifications are <br /> conducted, and the monitoring wells are appropriately abandoned. <br /> • The source of the UST release has been identified and removed. <br /> • Free-phase product in groundwater has been removed to the full extent <br /> practicable, in accordance with the UST Regulations (Title 23, CCR, <br /> Section 2655). <br /> California Environmental Protection Agency <br /> .n <br /> P„a Recycled Paper <br />