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| Acronym | Acronym Meaning | Additional Information |
|---|---|---|
| T | Transmissivity | |
| TAD | Technical Assistance Document | |
| TAG | Technical Assistance Grant | |
| TAL | Target Analyte List | |
| 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 | |
| TASO | Training Aids Service Office | |
| TAT | Technical Advisory Team | |
| TBA | To Be Announced | |
| TBD | To Be Determined | |
| TBT | Tributyltin | |
| TC | Toxic Concentration | |
| TC | Toxicity Characteristics | |
| TC | Target Concentration | |
| TC | Technical Center | |
| TCA | Trichloromethane | |
| TCDD | Dioxin (Tetrachlorodibenzo-p-dioxin) | |
| TCDF | Tetrachlorodi-benzofurans | |
| TCE | Trichloroethylene | |
| TCF | Total Chlorine Free | |
| TCL | Target Compound List | |
| TCLP | Total Concentrate Leachate Procedure | |
| TCLP | Toxicity Characteristic Leachate Procedure | |
| TCM | Transportation Control Measure | |
| TCP | Transportation Control Plan | |
| TCP | Trichloropropane | |
| TCRI | Toxic Chemical Release Inventory | |
| TD | Toxic Dose | |
| TDS | Total Dissolved Solids | |
| TEAM | Total Exposure Assessment Model | |
| TEC | Technical Evaluation Committee | |
| TEG | Tetraethylene Glycol | |
| TEGD | Technical Enforcement Guidance Document (USEPA) | |
| TEL | Threshold Effects Level | |
| TEL | Tetraethyl Lead | |
| TEM | Texas Episodic Model | |
| TEMPO | Tools for Environmental Management and Protection Organizations | |
| TEP | Typical End-use Product | |
| TEP | Technical Evaluation Panel | |
| TERA | TSCA Environmental Release Application | |
| TES | Technical Enforcement Support | |
| TGAI | Technical Grade of the Active Ingredient | |
| TGO | Total Gross Output | |
| TGP | Technical Grade Product | |
| THC | Total Hydrocarbons | |
| THM | Trihalomethane | |
| TI | Temporary Intermittent | |
| TI | Therapeutic Index | |
| TIBL | Thermal Internal Boundary Layer | |
| TIC | Technical Information Coordinator | |
| TIC | 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 | |
| TLF=V | Threshold Limit Value | |
| TLV-C | TLV-Ceiling | |
| TLV-TWA | TLV-Time Weighted Average | |
| TMDL | Total Maximum Daily Limit | |
| TMDL | 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 | |
| TOH | Total Organic Halogens | |
| TOX | Tetradichloroxylene | |
| TP | Technical Product | |
| TP | Total Particulates | |
| TPC | Testing Priorities Committee | |
| TPH | Total Petroleum Hydrocarbons | |
| 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 | |
| TRADOC | U.S. Army Training and Doctrine Command | |
| 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 | |
| TRS | Terminology Reference System | |
| TRV | Toxicity Reference Value | |
| TS | Tank System | |
| TS | Transfer Station (Solid Waste) | |
| TSA | Technical Systems Audit | |
| TSCA | Toxic Substances Control Act | |
| TSCATS | TSCA Test Submissions Database | |
| TSD | Technical Support Document | |
| TSD | Treatment, Storage, and Disposal | |
| TSDF | Treatment, Storage, and Disposal Facility | |
| TSDG | Toxic Substances Dialogue Group | |
| TSDR | Treatment, Storage, Disposal and Reclaiming (facility) | |
| TSE | RCRA Brownfield Prevention Initiative's Targeted Site Effort | |
| TSI | Thermal System Insulation | |
| TSM | Transportation System Management | |
| TSO | Time Sharing Option | |
| TSP | Total Suspended Particulates | |
| TSS | Total Suspended (non-filterable) Solids | |
| TT | Treatment Technique | |
| TTFA | Target Transformation Factor Analysis | |
| TTHM | Total Trihalomethane | |
| TTN | Technology Transfer Network | |
| TTO | Total Toxic Organics | |
| TTY | Teletypewriter | |
| TVL-STEL | TLV-Short Term Exposure Limit | |
| TVOC | Total Volatile Organic Compounds | |
| TVOP | Title 5 Operating Permits | |
| TWA | Time Weighted Average | |
| TWS | Transient Water System | |
| TZ | Treatment Zone |
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