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Sierra Lumber Case#2 July 2014 <br /> 375 Hazelton Avenue, Stockton <br /> Claim No: 8478 <br /> Objections to Closure and Responses <br /> According to the Path to Closure page in GeoTracker, finalized on December 16, 2013, the <br /> County opposes closure because: <br /> • Inadequate conceptual site model. <br /> RESPONSE: Adequate data is available in GeoTracker to prepare a conceptual site <br /> model. <br /> • Secondary source remains. <br /> RESPONSE: Secondary source as defined by the Policy was removed by excavation <br /> and active remediation. <br /> • The case does not meet Policy groundwater criteria. <br /> RESPONSE: We concur. <br /> • The case does not meet Policy vapor criteria. <br /> RESPONSE: The case meets Policy Criterion 2b. <br /> Recommendation <br /> The dual phase extraction system does not appear to be effective to achieve Policy criteria. <br /> The Fund recommends that the County direct the responsible party to define the extent of <br /> groundwater contamination as required by Policy criteria and evaluate alternative remedial <br /> technologies to achieve water quality objectives. <br /> —71zs° <br /> Kirk Larson, P.G. Date 'RobertTr6mmer, C.H.G. Date <br /> Engineering Geologist Senior Engineering Geologist <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663 (916) 341-5684 <br /> Page 3 of 3 <br />