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a <br /> Equilon Enterprises -4- February 22, 2010 <br /> Clain- No. 4954 <br /> D. Groundwater Trends: <br /> • Benzene trends are shown below, source area and down gradient, <br /> respectively. <br /> BENZENE Results for MW-9 <br /> 180 I f I <br /> 1._ <br /> 160 - <br /> 140 <br /> j <br /> 120 <br /> 100 <br /> t <br /> so <br /> ! 1 <br /> 60 <br /> 40 z <br /> 1 <br /> 20-- <br /> 01 <br /> ®_BENZENE ---- Trend <br /> BENZENE Results for MW-4 <br /> 1.8 <br /> 16 - ` <br /> 1 4 ___ <br /> ! <br /> i <br /> o.s T <br /> � - <br /> 0.6 — <br /> 0.4 <br /> 02 <br /> O 400 <br /> BENZENE Trend <br /> VII. SENSITIVE RECEPTOR SURVEY: no wells identified within 1/2 mile of the site <br /> VIII. 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 extraction and free product recovery <br /> California Environmental Protection Agency <br /> Ca Recycled Paper <br />