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} <br /> a <br /> R&L Business Management -3- May 3, 2010 <br /> Claim.No. 8828 <br /> B. In-Situ Soil Remediation: <br /> • METHOD: soil vapor extraction <br /> DURATION: Dec 03 through ? �rt <br /> • TOTAL MASS REMOVED:F 137 pounds of TPH-G <br /> .• CURRENT RATE OF REMOVAL: no hydrocarbons in influent- k <br /> 14C. Groundwater Remediation: <br /> • METHOD: groundwater extraction <br /> a <br /> • DURATION: Dec 03 through Mar 09 <br /> • VOLUME OF GROUNDWATER REMOVED: 11,000,000 gallons (Mar 09) , <br /> • MASS OF HYDROCARBONS REMOVED: 736 pounds of TPH-G <br /> D. Groundwater Trends':. ` e <br /> • Benzene trends are shown below: <br /> BENZENE Results for VW1 <br /> '35000- <br /> 30000 <br /> 35000 30000 -- <br /> 25000 <br /> 20000 <br /> I <br /> !1 � <br /> 15000 <br /> 10000 <br /> 5000 - <br /> 9 <br /> BENZENE Trend <br /> VII. SENSITIVE RECEPTOR SURVEY: four wells identified within-'/Z mile of the site <br /> Vlll. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: plating shop <br /> B. Site History: the extent of groundwater contamination is defined <br /> i <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 En vironmental Protection.Agency <br /> Z4 Recycled Paper <br />