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Equilon Enterprises -4- March 19, 2008 <br /> Claim No. 4954 <br /> D. Groundwater Trends: <br /> • Benzene trends are shown below <br /> Claim 4954 <br /> Deep Wells <br /> 1400 - <br /> 1200 <br /> 1000 <br /> d <br /> t MW-16-50 <br /> 800 <br /> N 600 BMW-16-77 <br /> d 400 = MW-16-90 <br /> M <br /> 200 <br /> 0 - <br /> Aug-07 Sep-07 Oct-07 Nov-07 <br /> Time <br /> Claim 4954 <br /> Shallow Wells <br /> 200 <br /> 3 150 <br /> 100 <br /> N <br /> c 50i <br /> m <br /> m <br /> 0 <br /> O"' O`5 Off` Off` O� 04' OHO OrO O� O� <br /> e<e10 Qom°' ��° Qom°' fie"° POS Qe"Q Q�°� �e� POS <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: no wells identified within Y2 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 /> Zta Recycled Paper <br />