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| Acronym | Acronym Meaning | Additional Information |
|---|---|---|
| S&A | Surveillance and Analysis | |
| S&A | Sampling 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 | |
| SampDB | Office of Land Quality Sampling Database | |
| SAMWG | Standing Air Monitoring Work Group | |
| SANE | Sulfur and Nitrogen Emissions | |
| SANSS | Structure and Nomenclature Search System | |
| SAP | Scientific Advisory Panel | |
| SAP | Sampling and Analysis Plan | |
| SAR | Start Action Request | |
| SAR | 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 | |
| SAS | Statistical Analysis System | |
| SASS | Source Assessment Sampling System | |
| SAV | Submerged Aquatic Vegetation | |
| SB | Soil Boring | |
| SBC | Single Breath Canister | |
| SBS | Sick Building Syndrome | |
| SC | Section Chief (IDEM) | |
| SC | Sierra Club | |
| SC | State Cleanup (IDEM) | |
| SCAP | Superfund Consolidated Accomplishments Plan | |
| SCAS | Small Communities Advisory Committee | |
| SCBA | Self-Contained Breathing Apparatus | |
| SCC | Sample Control Coordinator (SCC) | |
| SCC | Source Classification Code | |
| SCD/SWCD | Soil or Soil and Water Conservation District | |
| SCDM | Superfund Chemical Data Matrix | |
| SCFM | Standard Cubic Feet Per Minute | |
| SCR | Selective Catalytic Reduction | |
| SCRAM | State Consolidated RCRA Authorization Manual | |
| SCRC | Superfund Community Relations Coordinator | |
| SCS | Soil Conservation Service | |
| SCS | Supplementary Control Strategy/System | |
| SCSA | Soil Conservation Society of America | |
| SCSP | Storm and Combined Sewer Program | |
| SCW | Supercritical Water Oxidation | |
| SD | Site Discovery | |
| SD | Sediment | |
| SDC | Save the Dunes Council | |
| SDC | Systems Decision Plan | |
| SDWA | Safe Drinking Water Act | |
| SDWIS | Safe Drinking Water Information System | |
| SEA | State Enforcement Agreement | |
| SEA | State/EPA Agreement | |
| SEAM | Surface, Environment, and Mining | |
| SEAS | Strategic Environmental Assessment System | |
| SEDS | State Energy Data System | |
| SEE | Senior Environmental Employment Program | |
| SEGIP | State Environmental Goals and Improvement Project | |
| SEIA | Socioeconomic Impact Analysis | |
| SEM | Senior Environmental Manager | |
| SEM | Standard Error of the Means | |
| SEMA | State Emergency Management Agency | |
| SEP | Standard Evaluation Procedures | |
| SEP | Supplementary Environmental Project | |
| SEPC | State Emergency Planning Commission | |
| SEPWC | Senate Environment and Public Works Committee | |
| SES | Secondary Emissions Standard | |
| SETAC | Society for Environmental Toxicology and Chemistry | |
| SETS | Site Enforcement Tracking System | |
| SF | Standard Form | |
| SF | Superfund | |
| SFA | Spectral Flame Analyzers | |
| SFDS | Sanitary Facility Data System | |
| SFFAS | Superfund Financial Assessment System | |
| SFIREG | State FIFRA Issues Research and Evaluation Group | |
| SFS | State Funding Study | |
| SFY | State Fiscal Year | |
| SGP | Strategic Goals Program | |
| SHORTZ | Short Term Terrain Model | |
| SHWL | Seasonal High Water Level | |
| SI | Spark Ignition | |
| SI | Surface Impoundment | |
| SI | Site Inspection | |
| SI | International System of Units | |
| SI | Surveillance Index | |
| SI | Site Investigation | |
| SIC | Standard Industrial Classification | |
| SIC | Standard Industrial Code | |
| SICEA | Steel Industry Compliance Extension Act | |
| SIF | Site Investigation Follow-up | |
| SIMS | Secondary Ion-Mass Spectrometry | |
| SIP | State Implementation Plan | |
| SIS | Site Investigation Site | |
| SITE | Superfund Innovative Technology Evaluation | |
| SL | Sanitary Landfill | |
| SLAMS | State/Local Air Monitoring Station | |
| SLN | Special Local Need | |
| 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 | |
| SMOCC | Sample Management Office CLP Coordinator | |
| 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 | |
| SNAP | Significant Noncompliance Action Program | |
| SNARL | Suggested No Adverse Response Level | |
| SNC | Significant Noncompliers | |
| SNC | Significant Noncompliance | |
| SNSM | Simple Line Source Model | |
| SNUR | Significant New Use Rule | |
| SOx | Sulfur Oxides | |
| SO2 | Sulfur Dioxide | |
| SOB | State Office Building | |
| SOC | Synthetic Organic Chemicals | |
| SOC | Synthetic Organic Compounds | |
| SOCMI | Synthetic Organic Chemicals Manufacturing Industry | |
| SOFC | Solid Oxide Fuel Cell | |
| SOP(S) | Standard Operating Procedure(s) | |
| SOTDAT | Source Test Data | |
| SOW | Scope Of Work | |
| SP | State Plane | |
| SPA | State Program Approval | |
| SPAR | Status of Permit Application Report | |
| SPCB | Stream Pollution Control Board | |
| SPCC | Spill Prevention, Containment, and Countermeasure | |
| SPD | State Personnel Department (Indiana) | |
| SPE | Secondary Particulate Emissions | |
| SPF | Structured Programming Facility | |
| SPI | Strategic Planning Initiative | |
| SPLMD | Soil-pore Liquid Monitoring Device | |
| SPLP | Synthetic Precipitation Leaching Procedure | |
| SPMS | Strategic Planning and Management System | |
| SPMS | 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 Material | |
| SRM | Standard Reference Method | |
| SRP | Special Review Procedure | |
| SRR | Submission Review Record | |
| SRR | Second Round Review | |
| SRS | Simple Random Sampling | |
| SRTS | Service Request Tracking System | |
| SS | Sanitary Survey | |
| SS | Settleable Solids | |
| SS | Superfund Surcharge | |
| SS | Suspended Solids | |
| SSA | Sole Source Aquifer | |
| SSAC | Soil Site Assimilated Capacity | |
| SSB | Science Services Branch (IDEM/OLQ) | |
| SSC | State Superfund Contracts | |
| SSD | Standards Support Document | |
| SSEIS | Standard Support and Environmental Impact Statement | |
| SSEIS | Stationary Source Emissions and Inventory System | |
| SSI | Statistically Significant Increase | |
| SSI | Size Selective Inlet | |
| SSMS | Spark Source Mass Spectrometry | |
| SSO | Sanitary Sewer Overflow | |
| SSO | Sanitary Sewer Overflow | |
| SSOA | Source Specific Operating Agreement | |
| 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 | |
| STAR | State Acid Rain Projects | |
| STARS | Semi-annual Performance Measure Report | |
| STARS | Strategic Targeted Activities for Results System | |
| STEL | Short Term Exposure Limit | |
| STEM | Scanning Transmission-Electron Microscope | |
| StEP | Statistical Evaluation Plan | |
| STINET | Scientific and Technical Information Network | |
| STN | Scientific and Technical Information Network | |
| STORET | Storage and Retrieval of Water-Related Data | |
| STP | Sewage Treatment Plant | |
| STP | Standard Temperature and Pressure | |
| StRS | Stratified Random Sampling | |
| STTP | Small Town Task Force (EPA) | |
| SU | Superfund Site (Indiana) | |
| SUP | Standard Unit of Processing | |
| SURE | Sulfate Regional Experiment Program | |
| SUVA | Specific Ultraviolet Adsorption at 254 nanometers | |
| SV | Sampling Visit | |
| SV | Significant Violator | |
| SVE | Soil Vapor Extraction | |
| SVOC | Semi-Volatile Organic Compound | |
| SW | Slow Wave | |
| SW | Solid Waste | |
| SW | Special Waste | |
| SW | Static Water | |
| SW | Surface Water | Surface & Groundwater interaction  |
| SWANA | Solid Waste Association of North America | |
| SWAP | Source Water Assessment Program | |
| SWARF | Waste from Metal Grinding Process | |
| SWC | Settlement With Conditions | |
| SWDA | Solid Waste Disposal Act | |
| SWE | Society of Women Engineers | |
| SWL | Static Water Level | |
| SWLDF | Solid Waste Land Disposal Facility | |
| SWMB | Solid Waste Management Board | |
| SWMD | Solid Waste Management District | |
| SWMU | Solid Waste Management Unit | |
| SWP | Storm Water Plan | |
| SWPA | Source Water Protection Area | |
| SWQMS | Surface Water Quality Monitoring Strategy | |
| SWQPPP | Source Water Quality Protection Partnership Petitions | |
| SWRO | Southwest Regional Office | |
| SWTR | Surface Water Treatment Rule | |
| SyGS/rs | Systematic Grid Sampling with a Random Starting Point | |
| SYSOP | Systems Operator |
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