Description: Approximately 550,000 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. EPA, states, territories, and tribes work in partnership with industry to protect the environment and human health from potential releases.

    Other lists of interest are:

    Hazardous Substance List (40CFR116.4): related to Above Ground Storage Tanks Hazardous Substance List (40CFR116.4): related to Above Ground Storage Tanks

    List of constituents of motor fuels relevant to leaking underground storage tank sites List of constituents of motor fuels relevant to leaking underground storage tank sites

    Number of Chemicals: 756