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Description of Selected General Terms and Acronyms <br /> Term/Acronym Description <br /> MCL Maximum Contaminant Level. This Safe Drinking Water concept (and also used by many states as a ground water cleanup criteria) refers to <br /> the limit on drinking water contamination that determines whether a supplier can deliver water from a specific source without treatment. <br /> MSDS Material Safety Data Sheets. Written/printed forms prepared by chemical manufacturers, importers and employers which identify the physical <br /> and chemical traits of hazardous chemicals under OSHA's Hazard Communication Standard. <br /> NESHAP National Emissions Standard for Hazardous Air Pollutants (Federal Clean Air Act). This part of the Clean Air Act regulates emissions of <br /> hazardous air pollutants. <br /> NFRAP Facilities where there is"No Further Remedial Action Planned," as more particularly described under the Records Review section of this report. <br /> NOV Notice of Violation. A notice of violation or similar citation issued to an entity, company or individual by a state or federal regulatory body <br /> indicating a violation of applicable rule or regulations has been identified. <br /> NPDES National Pollutant Discharge Elimination System Clean Water Act). The federal permits stem for discharges of polluted water. <br /> NPL The NPL is the EPA's database of uncontrolled or abandoned hazardous waste facilities that have been listed for priority remedial actions <br /> under the Superfund Program. <br /> OSHA Occupational Safety and Health Administration or Occupational Safety and Health Act <br /> PACM Presumed Asbestos-Containing Material. A material that is suspected of containing or presumed to contain asbestos but which has not been <br /> analyzed to confirm the presence or absence of asbestos. <br /> Polychlorinated Biphenyl. A halogenated organic compound commonly in the form of a viscous liquid or resin, a flowing yellow oil, or a waxy <br /> solid. This compound was historically used as dielectric fluid in electrical equipment (such as electrical transformers and capacitors, electrical <br /> PCB ballasts, hydraulic and heat transfer fluids), and for numerous heat and fire sensitive applications. PCB was preferred due to its durability, <br /> stability (even at high temperatures), good chemical resistance, low volatility, flammability, and conductivity. PCBs, however, do not break <br /> down in the environment and are classified by the EPA as a suspected carcinogen. 1978 regulations, under the Toxic Substances Control Act, <br /> prohibit manufacturing of PCB-containing equipment; however, some of this equipment may still be in use today. <br /> pCi/L picoCuries per Liter of Air. Unit of measurement for Radon and similar radioactive materials. <br /> PLM Polarized Light Microscopy see ACM section of the report, if included in the scope of services <br /> PST Petroleum Storage Tank.An AST or UST that contains a petroleum product. <br /> A radioactive gas resulting from radioactive decay of naturally-occurring radioactive materials in rocks and soils containing uranium, granite, <br /> shale, phosphate, and pitchblende. Radon concentrations are measured in picoCuries per Liter of Air. Exposure to elevated levels of radon <br /> creates a risk of lung cancer; this risk generally increases as the level of radon and the duration of exposure increases. Outdoors, radon is <br /> Radon diluted to such low concentrations that it usually does not present a health concern. However, radon can accumulate in building basements or <br /> similar enclosed spaces to levels that can pose a risk to human health. Indoor radon concentrations depend primarily upon the building's <br /> construction, design and the concentration of radon in the underlying soil and ground water. The EPA recommended annual average indoor <br /> "action level" concentration for residential structures is 4.0 pCi/I. <br /> RCRA Resource Conservation and Recovery Act. Federal act regulating solid and hazardous wastes from point of generation to time of disposal <br /> cradle to grave'). 42 U.S.C. 6901 et seq. <br /> The RCRA Generators database, maintained by the EPA, lists facilities that generate hazardous waste as part of their normal business <br /> RCRA practices. Generators are listed as either large (LQG), small (SQG), or conditionally exempt (CESQG). LOG produce at least 1000 kg/month <br /> Generators of non-acutely hazardous waste or 1 kg/month of acutely hazardous waste. SQG produce 100-1000 kg/month of non-acutely hazardous <br /> waste. CESQG are those that generate less than 100 kg/month of non-acutely hazardous waste. <br /> RCRA The USEPA maintains a database of RCRA facilities associated with treatment, storage, and disposal (TSD)of hazardous materials which are <br /> CORRACTS/TS undergoing "corrective action". A "corrective action" order is issued when there is a release of hazardous waste or constituents into the <br /> Ds environment from a RCRA facility. <br /> RCRA Non- The RCRA Non-CORRACTS/TSD Database is a compilation by the USEPA of facilities which report storage, transportation, treatment, or <br /> CORRACTS/TS disposal of hazardous waste. Unlike the RCRA CORRACTS/TSD database, the RCRA Non-CORRACTS/TSD database does not include <br /> Ds RCRA facilities where corrective action is required. <br />