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R&L Business Manage ._ It -3- <br /> °' Claim No, 8828 May.30, 2008 <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> B. In-Situ Soil Remediation: - <br /> • METHOD: soil vapor extraction a •:� <br /> • DURATION: Dec-03 through present. <br /> • TOTAL MASS REMOVED: 137 pounds of TPH-G <br /> • CURRENT RATE OF REMOVAL: no hydrocarbons in influent <br /> C. Groundwater Remediation: <br /> • METHOD: groundwater extraction - - - - <br /> • DURATION: ' Dec 03 through present N <br /> VOLUMEOF-GROUNDWATER REMOVED: 2,315,705 pounds of TPH-G <br /> • . MASS OF HYDROCARBONS REMOVED: 258 pounds of TPH G <br /> D. Groundwater Trends: <br /> • . Benzene trends are shown below.- <br /> Claim <br /> elow:Giaim 8828 <br /> 35000 <br /> 30000 <br /> — 25000 <br /> 20000 <br /> 0Y <br /> 15000 <br /> 10000 <br /> 5000 w <br /> 0, <br /> AP o� <br /> - . .. :,�� .)�� •)ate ),� )ate .)`�� �2c )J�s• )a� .j�� �a� . .. .. <br /> .., ... . .... .. .. .. ... . . .. .. <br /> Time <br /> - <br /> VIL SENSITIVE RECEPTOR SURVEY: two wells identified within".:Y2 mile of the site <br /> VIII. .COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION' . '.'. = <br /> A. Site Description: plating shop <br /> B. Site History: the-extent of groundwater contamination is defined . <br /> C. Groundwater Monitoring Summary: weak monitoring history- <br /> D. Remediation Summary: soil vapor.and groundwater extraction <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> California Environmental Protection Agency` <br /> �,�Recycled Paper <br />