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N Floyd Barnes -4- April 26 , 2011 <br /> Claim No . 11828 <br /> A. Site Description : trucking facility, former fueling area <br /> B. Site History: the extent of groundwater contamination is defined <br /> C . Groundwater Monitoring Summary : strong monitoring history <br /> D. Remediation Summary: in-situ chemical oxidation , overdue <br /> E . Contaminant Exposure Pathway Evaluation : not yet assessed <br /> F . Recommendation : <br /> In April 2008 , the Fund recommends that the San Joaquin County LOP should <br /> direct the Responsible Party to conduct a limited investigation to confirm that the <br /> extent of groundwater contamination has been defined east of the site . The Fund <br /> also believes the Responsible Party should assess the effectiveness of the <br /> current groundwater treatment system . Benzene concentrations vary greatly <br /> seasonally suggesting the current sparge interval may not be optimal . The Fund <br /> will review this site next year to track progress . <br /> UPDATED , April 2009 , by letter on 6 April 2009 , the San Joaquin County LOP <br /> directed the Responsible Party to suspend ozone sparging and conduct a post <br /> remediation rebound test. The Fund recommends that active remediation <br /> continue to achieve Water Quality Objectives in a timely manner. The Fund will <br /> review this site next year to track progress . <br /> UPDATED , April 2010 , the Responsible Party will be submitting a Remedial <br /> Action Plan following in-situ chemical injection bench scale test. The Fund <br /> concurs with the San Joaquin County LOP that active remediation is necessary <br /> to reduce hydrocarbon mass in the soil and achieve Water Quality Objectives in <br /> a timely manner. The Fund will review this site next year to track progress. <br /> UPDATED , April 2011 , the Fund recommends that the San Joaquin County LOP <br /> require that the Responsible Party implement the approved remedial action to <br /> achieve Water Quality Objectives in a timely manner. <br /> Kirk Larson , P . G . Date Robert Trommer, C . H . G . Date <br /> Engineering Geologist SeniorEngineering Geologist <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341 -5663 (916) 341 -5684 <br /> California En vironmental Protection Agency <br /> A <br /> P.d Recycled Paper <br />