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| Acronym | Acronym Meaning | Additional Information |
|---|---|---|
| R | Radon (CERFA specific) | |
| R&D | Research and Development | |
| RA | Risk Assessment | |
| RA | Reasonable Alternative | |
| RA | Regional Administrator (USEPA) | |
| RA | Regulatory Alternatives | |
| RA | Regulatory Analysis | |
| RA | Remedial Action | |
| RA | Resource Allocation | |
| RA | Risk Analysis | |
| RAATS | RCRA Administrative Action Tracking System | |
| RAC | Raw Agricultural Commodity | |
| RAC | Regional Asbestos Coordinator | |
| RAC | Response Action Coordinator | |
| RAC | Radiation Advisory Committee | |
| RACM | Reasonably Available Control Measures | |
| RACT | Reasonably Available Control Technology | |
| RAD | Radiation Adsorbed Dose (unit of measurement of radiation absorbed by humans) | |
| RADM | Regional Acid Deposition Model | |
| RADM | Random Walk Advection and Dispersion Model | |
| Rads | Radionuclide | |
| RAGS | Risk Assessment Guidance for Superfund | |
| RAI | Request for Additional Information | |
| RAL | Removal Action Levels | |
| 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 | Remedial Action Plan | |
| RAP | Response Action Plan | |
| RAP | Remedial Accomplishment Plan | |
| RAP | Registration Assessment Panel | |
| RAP | Radon Action Program | |
| 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 | |
| RBC | Risk-Based Concentration | |
| RC | Responsibility Center | |
| RCC | Radiation Coordinating Council | |
| RCDO | Regional Case Development Officer | |
| RCO | Regional Compliance Officer | |
| RCP | Research Centers Program | |
| RCR | Remediation Completion Report | |
| RCRA | Resource Conservation and Recovery Act | |
| RCRA BF | Brownfield Site that falls under RCRA Regulation | |
| RCRIS | Resource Conservation and Recovery Information System | |
| RD | Radionuclides (CERFA specific) | |
| RD&D | Research, Development and Demonstration | |
| RD/RA | Remedial Design/Remedial Action | |
| RDA | Recommended Daily Allowance | |
| RDF | Refuse-Derived Fuel | |
| RDNA | Recombinant DNA | |
| RDT | Remediation Completion Report | |
| RDU | Regional Decision Units | |
| RDV | Reference Dose Values | |
| RE | Reasonable Efforts | |
| RE | Reportable Event | |
| READ | Registry of EPA Applications and Databases | |
| REAP | Regional Enforcement Activities Plan | |
| RECLAIM | Regional Clean Air Initiatives Marker | |
| RED | Reregistration Eligibility Decision Document | |
| REDA | Recycling Economic Development Advocate | |
| REE | Rare Earth Elements | |
| REEP | Review of Environmental Effects of Pollutants | |
| REF | Reference | |
| 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 | |
| RFA | RCRA Facility Assessment | |
| RFB | Request for Bid | |
| RfC | Reference Concentration | |
| RfD | Reference Dose | |
| RfD | Reference Dose Values | |
| RFI | RCRA Facility Investigation | |
| RFI | Remedial Field Investigation | |
| RFP | Reasonable Further Programs | |
| RFP | Request for Proposal | |
| RHRS | Revised Hazard Ranking System | |
| RI | Reconnaissance Inspection | |
| RI | Remedial Investigation | |
| RI/FS | Remedial Investigation/ Feasibility Study | |
| RIA | Regulatory Impact Analysis | |
| RIA | Regulatory Impact Assessment | |
| RIC | Radon Information Center | |
| RICO | Racketeer Influenced and Corrupt Organizations Act | |
| RIM | Regulatory Interpretation Memorandum | |
| RIN | Regulatory Identifier Number | |
| RIP | RCRA Implementation Plan | |
| RISC | Risk Integrated System of Closure | |
| RISC | Regulatory Information Service Center | |
| RJE | Remote Job Entry | |
| RL | Review Letter | |
| 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 | |
| RME | Recommended Maximum Exposure | |
| RMIS | Resources Management Information System | |
| RMSD | Root-Mean-Square Deviation | |
| 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 | |
| ROD | Record of Decision | |
| RODS | Records Of Decision System | |
| ROG | Reactive Organic Gases | |
| ROI | Radius Of Influence | |
| ROLLBACK | A Proportional Reduction Model | |
| ROM | Regional Oxidant Model | |
| ROP | Rate of Progress | |
| ROP | Regional Oversight Policy | |
| ROPA | Record Of Procurement Action | |
| ROSA | Regional Ozone Study Area | |
| RP | Radon Progeny Integrated Sampling | |
| RP | Respirable Particulates | |
| RP | Responsible Party | |
| RPAR | Rebuttable Presumption Against Registration | |
| RPD | Relative Percent Difference | |
| RPM | Remedial Project Manager | |
| RPM | Reactive Plume Model | |
| RPS | Responsible Party Search | |
| RPTL | Responsible Party (Property) Transfer Law | |
| RQ | Reportable Quantities | |
| RQ | Reportable Quantity | |
| RRC | Regional Response Center | |
| RRR | Reduce, Recycle, and Reuse | |
| RRT | Regional Response Team | |
| RRT | Requisite Remedial Technology | |
| RS | Registration Standard | |
| RSB | Remediation Services Branch | |
| RSCC | Regional Sample Control Center | |
| RSD | Regional Sewer District | |
| RSD | Risk-Specific Dose | |
| RSE | Removal Site Evaluation | |
| RSPA | Research and Special Programs Administration | |
| RSS | Ranked Set Sampling | |
| RTC | Return to Compliance | |
| 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 | |
| RWS | Restricted Waste Site I, II, III, or IV | |
| RWSX | Restricted Waste Site Unclassified |
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