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Roek Construction " -4- y April 4, 2008 <br /> Claim No. 7881 <br /> D. Groundwater Trends: <br /> • Benzene trends are shown below: <br /> Claim 7881 <br /> 25000 <br /> x <br /> 20000 <br /> X <br /> -*-MW-2 <br /> 15000 -- -MW-5 <br /> °f <br /> MW-13B <br /> c <br /> m <br /> c 10000 _ --x-MW-16B <br /> d <br /> m �F vW-1 <br /> 5000 - - <br /> 0 <br /> 00 O� p"� Off` Ob Off` Oh O� O5 OHO OHO peO O� O� O� <br /> Fe- � o°l� e SO <br /> Opti 4<8,1110 o°l� Qq(, °o <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: 14 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 predominantly defined <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> D. Remediation Summary: soil vapor extraction <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> California Environmental Protection Agency <br /> pd Recyc/eAPape, , <br />