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Description of Selected General Terms and Acronyms TemnlAcronym Description MCL Maximum Contaminant Level.This Safe Drinking Water concept(and also used by many states as a ground water cleanup criteria)refers to the limit on drinkingwater contamination that determines whether a supplier can deliver waterfrom a specific source without treatment. MSDS Material Safety Data Sheets. Written/printed forms prepared by chemical manufacturers,importers and employers which identify the physical and chemical traits of hazardous chemicals under OSHA's Hazard Communication Standard. NESHAP National Emissions Standard for Hazardous Air Pollutants (Federal Clean Air Act). This part of the Clean Air Act regulates emissions of hazardous air pollutants. NFRAP Facilities where there is"No Further Remedial Action Planned,"as more particularly described under the Records Review section of this report. 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 indicating a violation of applicable rule or regulations has been identified. NPDES National Pollutant Discharge Elimination System Clean Water Act). The federal permit system for discharges of polluted water. NPL The NPL is the EPA's database of uncontrolled or abandoned hazardous waste facilities that have been listed for priority remedial actions under the Su erfund Program. OSHA Occupational Safety and Health Administration or Occupational Safety and Health Act PACM Presumed Asbestos-Containing Material. A material that is suspected of containing or presumed to contain asbestos but which has not been anal ed to confirm thepresence or absence of asbestos. Polychlorinated Biphenyl.A halogenated organic compound commonly in the form of a viscous liquid or resin,a flowing yellow oil,or a waxy solid.This compound was historically used as dielectric fluid in electrical equipment(such as electrical transformers and capacitors,electrical PCB ballasts, hydraulic and heat transfer fluids), and for numerous heat and fire sensitive applications. PCB was preferred due to its durability, stability (even at high temperatures), good chemical resistance, low volatility, flammability, and conductivity. PCBs, however, do not break down in the environment and are classified by the EPA as a suspected carcinogen. 1976 regulafions,under the Toxic Substances Control Act, prohibit manufacturing of PCB-containing equipment;however,some of this equipment ma still be in use today. Ci/L picoCurles per Liter of Air.Unit of measurement for Radon and similar radioactive materials. PLM Polarized Light Microscopy see ACM section of the report,if included in the scope of services PST Petroleum Storage Tank.An AST or UST that contains a petroleum product. A radioactive gas resulting from radioactive decay of naturally-occurring radioactive materials in rocks and soils containing uranium, granite, shale, phosphate, and pitchblende. Radon concentrations are measured in picoCuries per Liter of Air. Exposure to elevated levels of radon creates a risk of lung cancer;this risk generally increases as the level of radon and the duration of exposure increases. Outdoors, radon is Radon diluted to such low concentrations that it usually does not present a health concern.However,radon can accumulate in building basements or similar enclosed spaces to levels that can pose a risk to human health. Indoor radon concentrations depend primarily upon the building's construction, design and the concentration of radon in the underlying soil and ground water.The EPA recommended annual average indoor "action level"concentration for residential structures is 4.0 pCiA. RCRA Resource Conservation and Recovery Act. Federal act regulating solid and hazardous wastes from point of generation to time of disposal 'cradle to grave").42 U.S.C.6901 at sec- The e .The RCRA Generators database, maintained by the EPA, lists facilities that generate hazardous waste as part of their normal business RCRA practices. Generators are listed as either large(LOG),small(SCG),or conditionally exempt(CESQG). LOG produce at least 1000 kg/month Generators of non-acutely hazardous waste or 1 kg/month of acutely hazardous waste. SQG produce 100-1000 kg/month of non-acutely hazardous waste. CESQG are those that generate less than 100 kg/month of non-acutely hazardous waste. RCRA The USEPA maintains a database of RCRA facilities associated with treatment,storage,and disposal(TSD)of hazardous materials which are CORRACTS/rS undergoing "corrective action". A "corrective action" order is issued when there is a release of hazardous waste or constituents into the Ds environment from a RCRA facility. RCRA Non- The RCRA Non-CORRACTS/TSD Database is a compilation by the USEPA of facilities which report storage, transportation, treatment, or CORRACTS/TS disposal of hazardous waste. Unlike the RCRA CORRACTSrrSD database, the RCRA Non-CORRACTS/TSD database does not include Ds I RCRA facilities where corrective action is required.