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Contaminated/Contamination—The PCBs—Polychlorinated biphenyls, Remedial/Remediation—An action presence of chemicals in soil,water,and/ which are industrial compounds which will rehabilitate contaminated or air,introduced by humans with the banned by law in 1979. media(such as groundwater)to the potential to pose risk to human health appropriate levels,as defined by EPA and the environment. Plume—A defined area,below the and the State of California. ground surface,where contaminated DTSC—Department of Toxic Substances groundwater exists. Risk Assessment—The qualitative Control,California Environmental Protec- and quantitative evaluation performed tion Agency Proposed Plan—The public as part of the remedial investigation participation requirement of CERCLA in an effort to define the potential risk Federal Facilities Agreement—Agree- which summarizes the preferred cleanup posed to public health and the ment between the operating agency(site) strategy,the rationale for the preference, environment. and federal and state EPA on the sched- alternatives presented,and any proposed ule of cleanup activities, including prepa- waivers to cleanup standards. ration of work plans,reports,and reme- RWQCB—Regional Water Quality dial designs. Receptor—A human,animal,or plant Control Board,a regional office of that comes in contact with contaminated the California Water Quality Groundwater—Water found beneath soil,sediment,air,and/or water. Control Board. the earth's surface that fills pores between soil and gravel particles to the point of Record of Decision(ROD)—A public SARA—See CERCLA. saturation. Groundwater often flows document describing which cleanup more slowly than surface water. document will be implemented at Solid Waste Management Unit Groundwater is the source of 80% a CERCLA site.The ROD is based (SWMU)—An area or building at of the United States'water supply. on information and technical analyses a facility from which hazardous Interim Remedial Measure(IRM)— generated during the RI/FS and materials may have migrated. An action which is designed to prevent incorporates public comments immediate health or environmental risk and community concerns. Superfund—See CERCLA. by exposure to contaminated media.The Remedial Investigation/Feasibility Study U.S. Environmental Protection IRM is usually followed by a permanent remediation system. ( /F9)—A two-part study of a hazardous Agency(EPA)—Federal agency waste site that supports the selection of a charged with implementing remedial action for the site. The RI CERCLA/SARA and other National Contingency Plan— identifies the type and extent of federal environmental A federal regulation that guides the contamination.The FS identifies regulations. Superfund program. and evaluates alternatives for addressing site contamination, Volatile Organic Compounds Operable Unit(OU)—A tern used based on the results of the RI. (VOCs)—Organic compounds to describe a certain discrete portion (for example,solvents)that (or management unit)of a CERCLA vaporize readily at room site. temperature. — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — DDJC-Tracy Environmental Cleanup Program Mailing List If you or someone you know would like to be placed on a mailing list to receive further information about the DDJC-Tracy environmental cleanup program, please fill out and return this coupon to: Defense Distribution Depot Name: San Joaquin California, Tracy Site Address: Office of Command Affairs Mr.Doug Imberi P.O.Box 960001 Stockton,CA 95296-0002 City/State/Zip Code: 9