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Abbreviations & Acronyms: R-ZNote: Some acronyms have more than one meaning. Multiple meanings are listed, separated by semi-colons. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z RA: Reasonable Alternative; Regulatory Alternatives; Regulatory Analysis; Remedial Action; Resource Allocation; Risk Analysis; Risk Assessment RAATS: RCRA Administrate Action Tracking System RAC: Radiation Advisory Committee. Raw Agricultural Commodity; Regional Asbestos Coordinator. Response Action Coordinator RACM: Reasonably Available Control Measures RACT: Reasonably Available Control Technology RAD: Radiation Adsorbed Dose (unit of measurement of radiation absorbed by humans) RADM: Random Walk Advection and Dispersion Model; Regional Acid Deposition Model RAM: Urban Air Quality Model for Point and Area Source in EPA UNAMAP Series RAMP: Rural Abandoned Mine Program RAMS: Regional Air Monitoring System RAP: Radon Action Program; Registration Assessment Panel; Remedial Accomplishment Plan; Response Action Plan RAPS: Regional Air Pollution Study RARG: Regulatory Analysis Review Group RAS: Routine Analytical Service RAT: Relative Accuracy Test RB: Request for Bid RBAC: Re-use Business Assistance Center RBC: Red Blood Cell RC: Responsibility Center RCC: Radiation Coordinating Council RCDO: Regional Case Development Officer RCO: Regional Compliance Officer RCP: Research Centers Program RCRA: Resource Conservation and Recovery Act RCRIS: Resource Conservation and Recovery Information System RD/RA: Remedial Design/ Remedial Action R&D: Research and Development RD&D: Research, Development and Demonstration RDF: Refuse-Derived Fuel RDNA: Recombinant DNA RDU: Regional Decision Units RDV: Reference Dose Values RE: Reasonable Efforts; Reportable Event REAP: Regional Enforcement Activities Plan REE: Rare Earth Elements REEP: Review of Environmental Effects of Pollutants RECLAIM: Regional Clean Air Initiatives Marker RED: Reregistration Eligibility Decision Document REDA: Recycling Economic Development Advocate ReFIT: Reinvention for Innovative Technologies REI: Restricted Entry Interval REM: (Roentgen Equivalent Man) REM/FIT: Remedial/Field Investigation Team REMS: RCRA Enforcement Management System REP: Reasonable Efforts Program REPS: Regional Emissions Projection System RESOLVE: Center for Environmental Conflict Resolution RF: Response Factor RFA: Regulatory Flexibility Act RFB: Request for Bid RfC: Reference Concentration RFD: Reference Dose Values RFI: Remedial Field Investigation RFP: Reasonable Further Programs. Request for Proposal RHRS: Revised Hazard Ranking System RI: Reconnaissance Inspection RI: Remedial Investigation RIA: Regulatory Impact Analysis; Regulatory Impact Assessment RIC: Radon Information Center RICC: Retirement Information and Counseling Center RICO: Racketeer Influenced and Corrupt Organizations Act RI/FS: Remedial Investigation/ Feasibility Study RIM: Regulatory Interpretation Memorandum RIN: Regulatory Identifier Number RIP: RCRA Implementation Plan RISC: Regulatory Information Service Center RJE: Remote Job Entry RLL: Rapid and Large Leakage (Rate) RMCL: Recommended Maximum Contaminant Level (this phrase being discontinued in favor of MCLG) RMDHS: Regional Model Data Handling System RMIS: Resources Management Information System RMP: Risk Management Plan RNA: Ribonucleic Acid ROADCHEM: Roadway Version that Includes Chemical Reactions of BI, NO2, and O3 ROADWAY: A Model to Predict Pollutant Concentrations Near a Roadway ROC: Record Of Communication RODS: Records Of Decision System ROG: Reactive Organic Gases ROLLBACK: A Proportional Reduction Model ROM: Regional Oxidant Model ROMCOE: Rocky Mountain Center on Environment ROP: Rate of Progress; Regional Oversight Policy ROPA: Record Of Procurement Action ROSA: Regional Ozone Study Area RP: Radon Progeny Integrated Sampling. Respirable Particulates. Responsible Party RPAR: Rebuttable Presumption Against Registration RPM: Reactive Plume Model. Remedial Project Manager RQ: Reportable Quantities RRC: Regional Response Center RRT: Regional Response Team; Requisite Remedial Technology RS: Registration Standard RSCC: Regional Sample Control Center RSD: Risk-Specific Dose RSE: Removal Site Evaluation RTCM: Reasonable Transportation Control Measure RTDF: Remediation Technologies Development Forum RTDM: Rough Terrain Diffusion Model RTECS: Registry of Toxic Effects of Chemical Substances RTM: Regional Transport Model RTP: Research Triangle Park RUP: Restricted Use Pesticide RVP: Reid Vapor Pressure RWC: Residential Wood Combustion S&A: Sampling and Analysis. Surveillance and Analysis SAB: Science Advisory Board SAC: Suspended and Cancelled Pesticides SAEWG: Standing Air Emissions Work Group SAIC: Special-Agents-In-Charge SAIP: Systems Acquisition and Implementation Program SAMI: Southern Appalachian Mountains Initiative SAMWG: Standing Air Monitoring Work Group SANE: Sulfur and Nitrogen Emissions SANSS: Structure and Nomenclature Search System SAP: Scientific Advisory Panel SAR: Start Action Request. Structural Activity Relationship (of a qualitative assessment) SARA: Superfund Amendments and Reauthorization Act of 1986 SAROAD: Storage and Retrieval Of Aerometric Data SAS: Special Analytical Service. Statistical Analysis System SASS: Source Assessment Sampling System SAV: Submerged Aquatic Vegetation SBC: Single Breath Cannister SC: Sierra Club SCAP: Superfund Consolidated Accomplishments Plan SCBA: Self-Contained Breathing Apparatus SCC: Source Classification Code SCD/SWDC: Soil or Soil and Water Conservation District SCFM: Standard Cubic Feet Per Minute SCLDF: Sierra Club Legal Defense Fund SCR: Selective Catalytic Reduction SCRAM: State Consolidated RCRA Authorization Manual SCRC: Superfund Community Relations Coordinator SCS: Supplementary Control Strategy/System SCSA: Soil Conservation Society of America SCSP: Storm and Combined Sewer Program SCW: Supercritical Water Oxidation SDC: Systems Decision Plan SDWA: Safe Drinking Water Act SDWIS: Safe Drinking Water Information System SBS: Sick Building Syndrome SEA: State Enforcement Agreement SEA: State/EPA Agreement SEAM: Surface, Environment, and Mining SEAS: Strategic Environmental Assessment System SEDS: State Energy Data System SEGIP: State Environmental Goals and Improvement Project SEIA: Socioeconomic Impact Analysis SEM: Standard Error of the Means SEP: Standard Evaluation Procedures SEP: Supplementary Environmental Project SEPWC: Senate Environment and Public Works Committee SERC: State Emergency Planning Commission SES: Secondary Emissions Standard SETAC: Society for Environmental Toxicology and Chemistry SETS: Site Enforcement Tracking System SF: Standard Form. Superfund SFA: Spectral Flame Analyzers SFDS: Sanitary Facility Data System SFFAS: Superfund Financial Assessment System SFIP: Sector Facility Indexing Project SFIREG: State FIFRA Issues Research and Evaluation Group SFS: State Funding Study SHORTZ: Short Term Terrain Model SHWL: Seasonal High Water Level SI: International System of Units. Site Inspection. Surveillance Index. Spark Ignition SIC: Standard Industrial Classification SICEA: Steel Industry Compliance Extension Act SIMS: Secondary Ion-Mass Spectrometry SIP: State Implementation Plan SITE: Superfund Innovative Technology Evaluation SLAMS: State/Local Air Monitoring Station SLN: Special Local Need SLSM: Simple Line Source Model SMART: Simple Maintenance of ARTS SMCL: Secondary Maximum Contaminant Level SMCRA: Surface Mining Control and Reclamation Act SME: Subject Matter Expert SMO: Sample Management Office SMOA: Superfund Memorandum of Agreement SMP: State Management Plan SMR: Standardized Mortality Ratio SMSA: Standard Metropolitan Statistical Area SNA: System Network Architecture SNAAQS: Secondary National Ambient Air Quality Standards SNAP: Significant New Alternatives Project; Significant Noncompliance Action Program SNARL: Suggested No Adverse Response Level SNC: Significant Noncompliers SNUR: Significant New Use Rule SO²: Sulfur Dioxide SOC: Synthetic Organic Chemicals SOCMI: Synthetic Organic Chemicals Manufacturing Industry SOFC: Solid Oxide Fuel Cell SOTDAT: Source Test Data SOW: Scope Of Work SPAR: Status of Permit Application Report SPCC: Spill Prevention, Containment, and Countermeasure SPE: Secondary Particulate Emissions SPF: Structured Programming Facility SPI: Strategic Planning Initiative SPLMD: Soil-pore Liquid Monitoring Device SPMS: Strategic Planning and Management System; Special Purpose Monitoring Stations SPOC: Single Point Of Contact SPS: State Permit System SPSS: Statistical Package for the Social Sciences SPUR: Software Package for Unique Reports SQBE: Small Quantity Burner Exemption SQG: Small Quantity Generator SR: Special Review SRAP: Superfund Remedial Accomplishment Plan SRC: Solvent-Refined Coal SRF: State Revolving Fund SRM: Standard Reference Method SRP: Special Review Procedure SRR: Second Round Review. Submission Review Record SRTS: Service Request Tracking System SS: Settleable Solids. Superfund Surcharge. Suspended Solids SSA: Sole Source Aquifer SSAC: Soil Site Assimilated Capacity SSC: State Superfund Contracts SSD: Standards Support Document SSEIS: Standard Support and Environmental Impact Statement;. Stationary Source Emissions and Inventory System. SSI: Size Selective Inlet SSMS: Spark Source Mass Spectrometry SSO: Sanitary Sewer Overflow; Source Selection Official SSRP: Source Reduction Review Project SSTS: Section Seven Tracking System SSURO: Stop Sale, Use and Removal Order STALAPCO: State and Local Air-Pollution Control Officials STAPPA: State and Territorial Air Pollution STAR: Stability Wind Rose. State Acid Rain Projects STARS: Strategic Targeted Activities for Results System STEL: Short Term Exposure Limit STEM: Scanning Transmission-Electron Microscope STN: Scientific and Technical Information Network STORET: Storage and Retrieval of Water-Related Data STP: Sewage Treatment Plant. Standard Temperature and Pressure STTF: Small Town Task Force (EPA) SUP: Standard Unit of Processing SURE: Sulfate Regional Experiment Program SV: Sampling Visit; Significant Violater SW: Slow Wave SWAP: Source Water Assessment Program SWARF: Waste from Metal Grinding Process SWC: Settlement With Conditions SWDA: Solid Waste Disposal Act SWIE: Southern Waste Information Exchange SWMU: Solid Waste Management Unit SWPA: Source Water Protection Area SWQPPP: Source Water Quality Protection Partnership Petitions SWTR: Surface Water Treatment Rule SYSOP: Systems Operator TAD: Technical Assistance Document TAG: Technical Assistance Grant TALMS: Tunable Atomic Line Molecular Spectroscopy TAMS: Toxic Air Monitoring System TAMTAC: Toxic Air Monitoring System Advisory Committee TAP: Technical Assistance Program TAPDS: Toxic Air Pollutant Data System TAS: Tolerance Assessment System TBT: Tributyltin TC: Target Concentration. Technical Center. Toxicity Characteristics. Toxic Concentration: TCDD: Dioxin (Tetrachlorodibenzo-p-dioxin) TCDF: Tetrachlorodi-benzofurans TCE: Trichloroethylene TCF: Total Chlorine Free TCLP: Total Concentrate Leachate Procedure. Toxicity Characteristic Leachate Procedure TCM: Transportation Control Measure TCP: Transportation Control Plan; Trichloropropane; TCRI: Toxic Chemical Release Inventory TD: Toxic Dose TDS: Total Dissolved Solids TEAM: Total Exposure Assessment Model TEC: Technical Evaluation Committee TED: Turtle Excluder Devices TEG: Tetraethylene Glycol TEGD: Technical Enforcement Guidance Document TEL: Tetraethyl Lead TEM: Texas Episodic Model TEP: Typical End-use Product. Technical Evaluation Panel TERA: TSCA Environmental Release Application TES: Technical Enforcement Support TEXIN: Texas Intersection Air Quality Model TGO: Total Gross Output TGAI: Technical Grade of the Active Ingredient TGP: Technical Grade Product THC: Total Hydrocarbons THM: Trihalomethane TI: Temporary Intermittent TI: Therapeutic Index TIBL: Thermal Internal Boundary Layer TIC: Technical Information Coordinator. Tentatively Identified Compounds TIM: Technical Information Manager TIP: Technical Information Package TIP: Transportation Improvement Program TIS: Tolerance Index System TISE: Take It Somewhere Else TITC: Toxic Substance Control Act Interagency Testing Committee TLV: Threshold Limit Value TLV-C: TLV-Ceiling TLV-STEL: TLV-Short Term Exposure Limit TLV-TWA: TLV-Time Weighted Average TMDL: Total Maximum Daily Limit; Total Maximum Daily Load TMRC: Theoretical Maximum Residue Contribution TNCWS: Transient Non-Community Water System TNT: Trinitrotoluene TO: Task Order TOA: Trace Organic Analysis TOC: Total Organic Carbon/ Compound TOX: Tetradichloroxylene TP: Technical Product; Total Particulates TPC: Testing Priorities Committee TPI: Technical Proposal Instructions TPQ: Threshold Planning Quantity TPSIS: Transportation Planning Support Information System TPTH: Triphenyltinhydroxide TPY: Tons Per Year TQM: Total Quality Management T-R: Transformer-Rectifier TRC: Technical Review Committee TRD: Technical Review Document TRI: Toxic Release Inventory TRIP: Toxic Release Inventory Program TRIS: Toxic Chemical Release Inventory System TRLN: Triangle Research Library Network TRO: Temporary Restraining Order TSA: Technical Systems Audit TSCA: Toxic Substances Control Act TSCATS: TSCA Test Submissions Database TSCC: Toxic Substances Coordinating Committee TSD: Technical Support Document TSDF: Treatment, Storage, and Disposal Facility TSDG: Toxic Substances Dialogue Group TSI: Thermal System Insulation TSM: Transportation System Management TSO: Time Sharing Option TSP: Total Suspended Particulates TSS: Total Suspended (non-filterable) Solids TTFA: Target Transformation Factor Analysis TTHM: Total Trihalomethane TTN: Technology Transfer Network TTO: Total Toxic Organics TTY: Teletypewriter TVA: Tennessee Valley Authority TVOC: Total Volatile Organic Compounds TWA: Time Weighted Average TWS: Transient Water System TZ: Treatment Zone UAC: User Advisory Committee UAM: Urban Airshed Model UAO: Unilateral Administrative Order UAPSP: Utility Acid Precipitation Study Program UAQI: Uniform Air Quality Index UARG: Utility Air Regulatory Group UCC: Ultra Clean Coal UCCI: Urea-Formaldehyde Foam Insulation UCL: Upper Control Limit UDMH: Unsymmetrical Dimethyl Hydrazine UEL: Upper Explosive Limit UF: Uncertainty Factor UFL: Upper Flammability Limit ug/m3: Micrograms Per Cubic Meter UIC: Underground Injection Control ULEV: Ultra Low Emission Vehicles UMTRCA: Uranium Mill Tailings Radiation Control Act UNAMAP: Users' Network for Applied Modeling of Air Pollution UNECE: United Nations Economic Commission for Europe UNEP: United Nations Environment Program USC: Unified Soil Classification USDA: United States Department of Agriculture USDW: Underground Sources of Drinking Water USFS: United States Forest Service UST: Underground Storage Tank UTM: Universal Transverse Mercator UTP: Urban Transportation Planning UV: Ultraviolet UVA, UVB, UVC: Ultraviolet Radiation Bands UZM: Unsaturated Zone Monitoring VALLEY: Meteorological Model to Calculate Concentrations on Elevated Terrain VCM: Vinyl Chloride Monomer VCP: Voluntary Cleanup Program VE: Visual Emissions VEO: Visible Emission Observation VHS: Vertical and Horizontal Spread Model VHT: Vehicle-Hours of Travel VISTTA: Visibility Impairment from Sulfur Transformation and Transport in the Atmosphere VKT: Vehicle Kilometers Traveled VMT: Vehicle Miles Traveled VOC: Volatile Organic Compounds VOS: Vehicle Operating Survey VOST: Volatile Organic Sampling Train VP: Vapor Pressure VSD: Virtually Safe Dose VSI: Visual Site Inspection VSS: Volatile Suspended Solids WA: Work Assignment WADTF: Western Atmospheric Deposition Task Force WAP: Waste Analysis Plan WAVE: Water Alliances for Environmental Efficiency WB: Wet Bulb WCED: World Commission on Environment and Development WDROP: Distribution Register of Organic Pollutants in Water WENDB: Water Enforcement National Data Base WERL: Water Engineering Research Laboratory WET: Whole Effluent Toxicity test WHO: World Health Organization WHP: Wellhead Protection Program WHPA: Wellhead Protection Area WHWT: Water and Hazardous Waste Team WICEM: World Industry Conference on Environmental Management WL: Warning Letter; Working Level (radon measurement) WLA/TMDL: Wasteload Allocation/Total Maximum Daily Load WLM: Working Level Months WMO: World Meteorological Organization WP: Wettable Powder WPCF: Water Pollution Control Federation WQS: Water Quality Standard WRC: Water Resources Council WRDA: Water Resources Development Act WRI: World Resources Institute WS: Work Status WSF: Water Soluble Fraction WSRA: Wild and Scenic Rivers Act WSTB: Water Sciences and Technology Board WSTP: Wastewater Sewage Treatment Plant WWEMA: Waste and Wastewater Equipment Manufacturers Association WWF: World Wildlife Fund WWTP: Wastewater Treatment Plant WWTU: Wastewater Treatment Unit ZEV: Zero Emissions Vehicle ZHE: Zero Headspace Extractor ZOI: Zone Of Incorporation ZRL: Zero Risk Level More Abbreviations and Acronyms A-D | E-I | J-Q
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