Aboveground storage tank requirements

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• septic tanks Requirements for AST facilities with a • a surface impoundment, pit, pond, or lagoon capacity greater than one million gallons • stormwater collection systems Facilities with greater than one million gallons total capacity for all liquid storage tanks must apply to the • temporary tanks (tanks at a site less than 30 days MPCA for a major facility permit. Requirements for • storage tanks with drinking water, filtered-surface tanks at these facilities are based on the individual site water, demineralized water, noncontact cooling and tank characteristics(Minn. R. 7001.4200). water, or water stored for emergency purposes Requirements for small tanks near surface Requirements for regulated tanks greater Water thatl 1,100 gallOnS Regulated tanks with a capacity of greater than 500 gallons, but less than or equal to 1,100 gallons that are All regulated tanks with a capacity greater than 1,100 within 500 feet of a class 2 surface water(water that can gallons must: be used for recreational purposes)are required to: • be registered with the MPCA . be registered with the MPCA • be labeled • be labeled • be constructed using appropriate industry standards . provide secondary containment • have secondary containment . have a sign at the facility • have a facility sign posted . be constructed using appropriate industry standards • have substance transfer area safeguards Requirements for temporary tanks • have internal and/or external corrosion protection Tanks larger than 1,100 gallons that store product for • have overfill protection longer than 30 days, but less than one year are defined as • be monitored for leaks and regularly inspected temporary tanks and must: • be properly maintained • be labeled • have monitoring and inspection records on site • have a posted facility sign • assess releases during operations or at tank removal • have secondary containment and report them to the State Duty Officer at . be maintained 1-800-422-0798 Temporary tanks with a capacity of greater than 500 • label lines so connections can be identified during gallons within 500 feet of a class 2 surface water must substance transfer also meet the temporary tank requirements listed above. • have underground pipin�safeguards if utilized The MPCA will not require temporary tanks to be • be properly closed if no longer used registered, however the rule requirements still apply. • be sampled for contamination when tank is removed Compliance with other regulations More information about these requirements and their Other regulations that tank owners need to be in effective dates can be found in fact sheets listed at the compliance with include: end of this document in the"Need more informatiorr" section. General Requirements for Aboveground Storage Tanks • t-a1-02 • Apri�2004 �. � MinnesoW Pollution �'�" Ca�trol Aye�xY Page 2