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Van De Pol Enterprises -4- March 14, 2008 <br /> Claim No. 757 <br /> ti <br /> C. Groundwater Trends: <br /> + Benzene trends are shown below <br /> Claim 757 <br /> Shallow Wells <br /> 350 <br /> ,300 <br /> 250 - MW-1 <br /> 200 <br /> - c 150 ,t ---er--MW-2 � <br /> as <br /> = 100 — ...MW-3 <br /> m 54 <br /> O O O O O O O O O O O O O O <br /> Q ¢ ❑ ¢ ¢ ❑ Q ¢ ❑ Q .¢ ❑ ¢ Q <br /> Time <br /> Claim 757 <br /> Deep Wells <br /> 50 <br /> �+ 40 —�--MW-13A <br /> 30 <br /> - MW-138 <br /> 20 <br /> MW-13C <br /> d 10 - <br /> r~ <br /> CO <br /> L CLCL D N CL 31 N CL OS <br /> .¢ .¢ o. .¢ .¢ a ¢ , Q ¢. Q ¢ ¢ <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: five wells identified within '/2 mile of the site <br /> Vlll. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description- active retail gasoline station <br /> B. Site History: the extent of groundwater contamination is poorly defined vertically <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 /> California Environmental Protection Agency <br /> .o <br /> P.j1 Recycled Paper <br />