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x W. Graffigna Jr. and William Graffigna` -3- May 9, 2008 <br /> ell Claim No. 13578 <br /> B. In-Situ Soil Remediation: <br /> • METHOD: soil vapor extraction <br /> • DURATION: Oct 06 through May 07 <br /> _ _ i <br /> C. Groundwater Remediation:` <br /> METHOD: batch extraction <br /> • DURATION: 2005 through 2006 <br /> D. Groundwater Trends: <br /> • MTBE trends are shown below <br /> Claim 13578 <br /> 350000 <br /> 300000 <br /> 250000 - <br /> 200000 - MW-2 <br /> m 150000 - <br /> 100000 - <br /> 50000 <br /> 50000 10000050000 <br /> 0 <br /> 0 0 0 0 o a o 0 0 0 <br /> L o a !- n L n <br /> ca <br /> v> cn cn 2 to v? <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: one well identified within '/ mile of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: retail gasoline station <br /> B. Site History: the extent of groundwater contamination is undefined to the south <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> D. Remediation Summary: soil vapor extraction and batch extraction <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> r Cal.larniaERvrronmendalProtectrowAgency <br /> ' Z.,'t),i'ecycledPape� <br />