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TPH Total Petroleum Hydrocarbons <br /> TRIS Toxic Chemical Release Inventory System <br /> TSCA Toxic Substances Control Act <br /> TSD Treatment, Storage, and Disposal Facilities <br /> USDA United States Department of Agriculture <br /> USEPA United States Environmental Protection Agency <br /> USGS United States Geological Survey <br /> UST California Registered Hazardous Substance Storage Containers (Underground <br /> Storage Tanks) <br />