What Underground Storage Tanks Are Exempt From Regulation?
• USTs whose capacity is 110 gallons or less. • Heating oil tanks for consumptive use on site where stored. • Septic tanks. • Flow through process tanks. • Tanks located in an underground area such as a basement and installed upon or above the floor. • USTs used for operational purposes of equipment or machinery such as hydraulic lifts. • USTs holding waste defined as hazardous by federal EPA RCRA hazardous waste regulations. • USTs used as emergency spill or overfill containment and emptied immediately after use. • USTs used as part of a pipeline facility regulated under the Natural Gas Pipeline Safety or Hazardous Liquid Pipeline Safety Acts. • USTs used as part of a wastewater treatment system regulated under the federal Clean Water Act, Section 402 or 307(b). • USTs used only for farm or residential purposes, less than or equal to 1,100 gallons and installed prior to July 1, 1987. However, the tanks must be registered with the DNR. Farm and residential USTs installed after June 30,
