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Attachment A <br />EXPLANANTION FOR DATABASE LISTING SOLID WASTE MANAGEMENT UNITS <br />(SWMUs), POTENTIAL SWMUs, AND AREAS OF CONCERN <br />The purpose of this database is to provide a comprehensive lest of known SWMUs, potential <br />SWMUs, and Areas of Concern (ADCs). A SWMU is defined as any disccmabic waste <br />managcmcnt unit at a RCRA facility from which a hazardous constituent may migrate, <br />irrespective of whether the unit was intended for the management of solid/ha7ardous <br />wastes. Examples include, surface impoundments, waste piies, land treatment units, <br />landfills, containers, tanks, incinerators, injection wells, recycling units, waste water <br />treatment units, and others generally exempted from standards applicable to hazardous <br />waste managcmcnt unit -s. This definition also includes auras contaminated by routine, <br />systematic, and deliberate discharges from process areas. (RCRA Facility Assessment <br />Guidance documnt, Permits and State Programs Division, Office of Solid Waste U. S. <br />Environmental Protection Agency, 1986.) <br />Potential SWMUs, as used in this database, are areas that may have been used for storage <br />and/or disposal of hazardous wastes from which a hazardous constituent may migrate, <br />irrespective of whether the unit was intended for the management of solid/ha7ardous - <br />wasles. <br />Areas of Concern (AOCs), as used in this database, arc areas that arc referenced in previous <br />reports or on maps that may have contributed to soil or groundwater contamination. <br />The symlmis used in each column of the database arc explained below. <br />A#3 Area of concern number 3 <br />S93 Solid waste managcmcnt unit number 3 <br />PS93 Potential solid waste management unit number 3 <br />.Unii/Ama <br />SWMU Solid Wstc Managemnt Unit <br />SWMU? Potential solid waste management unit <br />AOC Area of Concern <br />Wasic of Conccm <br />M metals <br />S solvents <br />P paint <br />Misc. various liquids and cleaning wastes,(including wash water from steam <br />cleaners, antifrec7.c, CBC.) <br />V00 volatile organic compounds <br />PH pesticides, herbicides <br />R radioactive materials <br />POL petroleum, oil, lubricant <br />BA battery acid <br />Org. various organics <br />Inorg. various inorganics <br />Map Qrid Location <br />? no information available <br />Spall south balloon <br />NBall North Balloon <br />not applicable <br />.no information available <br />