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Floyd Barnes -4- April 28 , 2008 <br /> Claim No . 11828 <br /> C . Groundwater Monitoring Summary : strong monitoring history <br /> D . Remediation Summary: oxygen injection <br /> E . Contaminant Exposure Pathway Evaluation : unknown <br /> F. Recommendation : The Fund concurs with the San Joaquin County LOP that a <br /> limited investigation be conducted to confirm that the extent of groundwater <br /> contamination has been defined east of the site . The Fund also believes the <br /> Responsible Party should assess the effectiveness of the current groundwater <br /> treatment system . Benzene concentrations vary greatly seasonally suggesting <br /> the current sparge interval may not be optimal . The Fund will review this site <br /> next year to track progress . /���Z�c/./JyCX ty <br /> 67 <br /> Kirk Larson , P . G . Date Robert Trommer, C . H . G . Date <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341 -5663 (916) 341 -5684 <br /> California Environmental Protection Agency <br /> ea Recycled Paper <br />