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Rose and Rogers Estate -3- April 23, 2008 <br /> Claim No. 11508 <br /> B. In-Situ Soil Remediation: none identified <br /> • METHOD: soil vapor extraction <br /> • DURATION: Feb 00 through Oct 04 <br /> C. Groundwater Remediation: <br /> • METHOD: biosparging <br /> • DURATION: proposed <br /> D. Groundwater Trends: <br /> • Benzene trends are shown below: <br /> Claim 11508 <br /> 16000 <br /> 14000 <br /> c 12000 <br /> 10000 —s M-4rs <br /> m 8000 <br /> VW-2d <br /> N 6000 <br /> m 4000 <br /> 2000 <br /> 0 <br /> 00 05 <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: one well identified within '/z mile of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: transmission shop <br /> B. Site History: the extent of groundwater contamination is undefined southeast of <br /> the site <br /> C. Groundwater Monitoring Summary: moderate monitoring history <br /> D. Remediation Summary: soil vapor extraction and air sparging is proposed <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> California En vironmental Protection Agency <br /> :a Recyded Paper <br />