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4 <br /> Van De'Pol Enterprises -4- _ September 2, 2010 <br /> Claim No. 757 <br /> C. Groundwater Trends:. Benzene trends are shown below, shallow source area <br /> and down gradient, respectively. <br /> BENZENE Results for AW 2A ; <br /> 14000 <br /> 12000 ... ....,...s...+4-. <br /> f 4 <br /> 10000 - - .- - - � <br /> 8000 <br /> 6001)----- <br /> 4000- <br /> 04 <br /> 000 ---40000 <br /> BENZENE <br /> BENZENE Results for MW 4 <br /> 2500 --�_ _— -- - - --- <br /> 2000 <br /> 1500 <br /> 'w <br /> w <br /> 1000 -- <br /> 500 41 , <br /> A . ' > al . <br /> �� BENZENE <br /> VII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: active retail 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 recovery and air sparging <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation: <br /> In March 2008, the current groundwater.treatment system is screened above <br /> contamination identified by wells MW-13A, MW-1313, and MW-13C. The Fund <br /> recommends that the San Joaquin County LOP direct the Responsible Party to <br /> California En vironrnental Protection Agcncy <br /> Zt Recycled Paper <br />