What is a regulated UST?
Any UST containing petroleum or hazardous substances than or equal to 110 gallons and operated on or after January 1, 1974, with the exception of USTs used for on-site heating such as home heating oil USTs. Farm and residential UST must be greater than or equal to 1,100 gallons to be regulated. Over a ten-year period ending December 22, 1998, all operating USTs were required to be closed or upgraded. The upgrade requirements included three systems to prevent or detect a release: • Corrosion prevention (for steel USTs) • Spill and overfill prevention • Leak detection Compliance with these requirements is the responsibility of the UST Program.
