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DDJC-Shame <br /> PROTECTIVENESS DETERMINATION <br /> The actions taken pursuant to the DDJC-Sharpe Record of Decision to address contamination identified in <br /> mils and groundwater at DDJC-Sharpe have addressed or are addressing the threats of contaminant <br /> exposure to human health and the environment and are protective.This protectiveness determination is <br /> made for the DDJC-Sharpe Five-Year Review. The following statements address the protectiveness of the <br /> removal and remedial actions taken at DDJC-Sharpe. <br /> OU 7 Protectiveness <br /> The actions taken for Operable Unit(OU) 1 (groundwater)have been protective in the first five years of <br /> operation. However,evidence of incomplete capture of contaminant plumes indicates that extraction well <br /> systems are not operating as intended. Because of this,the OU 1 actions may not be protective into the <br /> future.To assure protectiveness,the recommendations and follow-up actions presented in Section 9 must <br /> be implemented. <br /> OU 2 Protectiveness <br /> The actions taken for OU 2 (soil)are not fully protective because sod at Site S-26 contains lead <br /> concentrations that do not allow unrestricted use. Therefore, land use controls are necessary to assure that <br /> use of the area of contamination remains industrial unless additional excavation occurs. Furthermore, if a <br /> higher inhalation toxicity value(0.4 per mg/kg-day) is accepted for trichloroethene(TCE),the <br /> concentrations of TCE that were left in the soil in 2001 after soil vapor extraction(SVE) remedial actions <br /> ceased could pose a risk to occupants of residences constructed at the SVE sites. However,there are no <br /> residences or occupied structures of any kind on those sites. The actions for volatile organic compounds <br /> (VOCs)are protective under current land use and are likely to be protective in the future because the <br /> VOC concentrations will be reduced naturally with time.The next five-year review will be a statutory <br /> review becaus and TC ncentrations in soil are not protective for unrestricted land use. <br /> C <br /> /ery� l2—[z- o3 <br /> S. Department of Defense, Defense Logistics Agency Date <br /> olonel Edward R. Visker, U. S. Army <br /> Coau <br /> der, Defense Distribution Depot San Joaquin California <br /> State of California Regional Water Quality Control Board Date <br /> Thomas R Pinkos, Executive Officer <br /> Central Valley Region <br /> /- 5- 0� <br /> Cal/EPA epartme xic Substances Control Date <br /> Anthony J. Landis, hief <br /> Northern California Operations, Office of Military Facilities <br /> U.S. n omnental Protection Agency Date <br /> Joel Jones, Chief <br /> Federal Facilities and Site Cleanup Branch <br /> LAMy Documents\Word Documents\5 Yr Signature Pagel.doc 1 November 2003 <br />