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Claim 14120 <br />k <br />_ _ _ ., <br />LU LO CD CD <br />9 9 9 9 <br />co <br />Time <br />350000 <br />300000 <br />250000 <br />a 200000 <br />m 150000 <br />E 100000 <br />50000 <br />0 <br />MW-1 <br />—a— MW-2 <br />MW-3 <br />MW-4 <br />MW-7a <br />Waterloo Food and FL -4- May 28, 2008 <br />Claim No. 14120 <br />D. Groundwater Trends: <br />MTBE trends are shown below <br />SENSITIVE RECEPTOR SURVEY: four wells identified within 1/2 mile of the site <br />COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br />Site Description: retail gasoline station <br />Site History: the extent of groundwater contamination is undefined to the west <br />Groundwater Monitoring Summary: moderate monitoring history <br />Remediation Summary: soil vapor and groundwater extraction <br />Contaminant Exposure Pathway Evaluation: unknown <br />Recommendation: The Fund recommends that the San Joaquin County LOP <br />direct the Responsible Party to assess the effectiveness of the current treatment <br />systems and consider adding additional groundwater treatment technologies to <br />achieve Water Quality Objectives more rapidly. In addition, the Fund <br />recommends the Responsible Party define the extent of groundwater <br />contamination west of the site. The Fund will review this site next year to track <br />progress. <br />California Environmental Protection Agency <br />4.1 <br />Kirk Larson, P.G. <br />Technical Review Unit <br />(916) 341-5663 <br />5-k/O Y -/to•—)----- f-'/20,7 <br />Date obert Trommer, C.H.G. Date <br />Chief, Technical Review Unit <br />(916) 341-5684 <br />Z.<11 Recycled Paper