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0 At DDJC-Tracy, the regulatory Innovative Technologies Improve oversight agencies are the USEPA, The Comprehensive Record of Cleanup Program. DDJC-Tracy is the State of California Department of Decision can be reviewed at known for using cleanup strategies Toxic Substances Control, and the DDJC-Tracy's Information that are both proven and innovative. Regional Water Quality Control Repository, located at: Board. These agencies and DDJC- The depot is using a "low flow" Tracy signed the Comprehensive Defense Distribution Depot system to sample its groundwater ROD in April 1998. San Joaquin monitoring wells. The low flow Environmental Protection system produces less purge The 1998 Comprehensive ROD Public Safety Division water, saves tax dollars, and modified groundwater treatment Building S-108, Sharpe Facility allows for the collection of better discharge limits set in the earlier Lathrop, CA 95330 groundwater samples. 1993 ROD. The ROD also evaluated (209) 982-2085 The depot is developing a 37 sites where earlier investigations computer-based Environmental had indicated that contamination Groundwater Treatment System Data Management System might be present in the soil or the Goes On-Line. The groundwater (EDMS). The EDMS overlays groundwater. The ROD determined extraction wells at DDJC-Tracy are information about the IRP onto that no further action was required at connected to a master computer that maps and figures. The program is 21 of these sites, because either records data from each of the wells. designed to support critical investigations did not find This data enables IRP staff to decision making and reporting, contamination at levels of concern, monitor how well the system is ensure more timely and complete or the sites had been cleaned up in working and to quickly respond to access to IRP information, the mean time. The ROD then any problems. improve public access to the IRP, specified the cleanup technologies and reduce costs to taxpayers. ■ that will be used to remediate the remaining 16 sites. Continued on back page Most of the sites identified for further cleanup are called Solid Waste Management Units (SWMUs). DDJC-Tracy is currently using a program called the Total Environmental Restoration Contract (TERC) to manage cleanup work at six of these SWMU sites. Removal actions have been s =i completed at three SWMU sites and plans are in place to address the others. . New Treatment Plant Now ) Operating. In our last fact sheet, we reported that a new groundwater treatment plant was under construction on the DDJC- Tracy Annex property. This treatment plant is now fully operational. Like the first treatment plant, the new plant uses an air stripper to remove traces of solvents The new groundwater treatment system at the DDJC-Tracy Annex from groundwater. property strips certain chemicals from the groundwater. The clean water is then returned to the ground.