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  1. www.epa.gov › ust › learn-about-underground-storageLearn About Underground Storage Tanks | US EPA

    4 days ago · What is an UST? An underground storage tank system is a tank and any underground piping connected to the tank that has at least 10 percent of its combined volume underground. The federal UST regulations apply only to UST systems storing either petroleum or certain hazardous substances.

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      An underground storage tank (UST) system is a tank (or a...

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  3. en.wikipedia.org › wiki › Underground_storage_tankUnderground storage tank - Wikipedia

    An underground storage tank (UST) is, according to United States federal regulations, a storage tank, including any underground piping connected to the tank, that has at least 10 percent of its volume underground.

  4. www.epa.gov › ustUnderground Storage Tanks (USTs) | US EPA

    Jul 25, 2024 · Approximately 542,000 underground storage tanks (USTs) nationwide store petroleum or hazardous substances. The greatest potential threat from a leaking UST is contamination of groundwater, the source of drinking water for nearly half of all Americans.

  5. 19january2021snapshot.epa.gov › ust › learn-aboutLearn About Underground Storage Tanks (USTs) | US EPA

    Sep 29, 2020 · What is an UST? An underground storage tank system (UST) is a tank and any underground piping connected to the tank that has at least 10 percent of its combined volume underground. The federal UST regulations apply only to UST systems storing either petroleum or certain hazardous substances.

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  7. www.epa.gov › ust › frequent-questions-aboutFrequent Questions About Underground Storage Tanks

    4 days ago · An underground storage tank (UST) system is a tank (or a combination of tanks) and connected underground piping having at least 10 percent of their combined volume underground. The tank system includes the tank, underground connected piping, underground ancillary equipment, and any containment system.

  8. safetyculture.com › topics › underground-storage-tankUnderstanding Underground Storage Tanks - SafetyCulture

    Dec 13, 2023 · Underground Storage Tanks, or USTs, are used to store petroleum products, chemicals, and other hazardous materials underground. USTs are typically made of steel or fiberglass and can range in size from a few hundred to several million gallons.

  9. www.gwpc.org › topics › underground-storage-tanksUnderground Storage Tanks - Ground Water Protection Council

    An underground storage tank system (UST) is a tank and any underground piping connected to the tank that has at least 10 percent of its combined volume underground. UST systems that contain fuels, chemicals, and wastes are numerous and widespread and pose a significant threat to ground water quality in the United States.

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