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Draft Remedial Design Defense Depot San Joaquin Tracy Site 6.1 Introduction indicates that ICs will include land use restrictions and groundwater monitoring. Furthermore, land use restrictions will be implemented to prevent disturbances to groundwater, such as leaving a structure over the area of contamination to prevent infiltration and contaminant migration or to prevent human health impacts. Additionally, Section 6.1 indicates that a human health threat exists at SMWU 7, but subsequent sections do not discuss the human health threats or how they will be mitigated. In an effort to prevent further delays on the finalization of the Record Of Decision for Tracy, it was agreed that the specifics of the ICs would be developed in the Remedial Design. Recommendation: As part of the Remedial Design include a description of the type of IC required and provide the reason. Also, identify the specific activities that is prohibited by the IC and include specific land use changes that are prohibited. The specific IC language should include the process that will be followed in the event a land use change is identified in the future, i.e, how will the regulatory agencies be notified prior to any major land use change. A change from Tracy, DDJC's current land use to recreational and/or a sensitive land use such as housing, schools, hospitals and or day care centers is a major land use change. Additionally, indicate how and/or where the IC will be recorded and how will it be enforced. 6.2.4 Design Data Gaps and 6.2.5 Design Data Collection Plan indicate that the leachability of soil contaminants from SMWU 7 into groundwater is a threat and that the additional data will identify the extent of the threat. Furthermore, it will support future decisions regarding groundwater monitoring without any mention of human health threat which was referenced earlier in Section 6.1. The seven pits which make up SMWU 7 are now either partially or completely beneath Warehouses 15, 19 and 21 and /or concrete or asphalt pavement. Partial or complete removal of any of these structures may impact human health threats. Recommendation: Revise the appropriate sections so that they are consistent. Additionally, present the details cf ICs for the site. 6.3 SWMU 33 Industrial Pipeline Section 6.3.3 ROD Requirements does not provide what the ICs will entail. Refer to above comment and revise sections according. 6.4 Building 30 Drum Storage Area Section 6.4.3 ROD Requirements does not provide what the ICs will entail. Refer to above comment and revise sections according. HM dg 2 HMI3v V