Minnesota Administrative Rules

7150.0400 TEMPORARY CLOSURE.

Subpart 1.

Requirements.

In addition to the requirements of the most current Minnesota Fire Code, owners and operators must comply with the provisions in subparts 2 to 5 relating to temporary closure.

Subp. 2.

Tanks out of service less than 90 days.

When a UST system is out of service for less than 90 days, owners and operators must continue operation and maintenance of corrosion protection according to part 7150.0215, and any release detection according to parts 7150.0300 to 7150.0340. Release detection is not required as long as the UST system is empty. The UST system is empty when all materials have been removed using commonly employed practices so that no more than 2.5 centimeters, or one inch, of residue remains in the system as measured through any part of the UST system.

Subp. 3.

Tanks out of service 90 days.

When a UST system is out of service for 90 days or more, owners and operators must also comply with the following requirements:

A.

leave vent lines open and functioning;

B.

cap and secure all other lines, pumps, passageways, and appurtenances;

C.

empty the tank;

D.

continue operation and maintenance of cathodic protection according to part 7150.0215; and

E.

notify the commissioner of the change of status to temporary closure according to part 7150.0090, subpart 2.

Subp. 4.

Tanks out of service one year.

When a UST system is out of service for one year or more, owners and operators must permanently close the UST system according to part 7150.0410, unless the owner or operator requests an extension of the closure period by submitting an application for an extension on a form approved by the commissioner and the commissioner approves the extension in writing based on compliance with this part. Conditions of extension must include record-keeping requirements according to part 7150.0450 and the continued operation and maintenance of corrosion protection according to part 7150.0215. The UST system may not be returned to service without the written approval of the commissioner, based on compliance with the applicable requirements of this chapter.

Subp. 5.

Tanks out of service five years.

All UST systems must be permanently closed if the UST system is out of service for five years or more.

Statutory Authority:

MS s 116.49

History:

16 SR 59; 32 SR 1751; 34 SR 1610; 43 SR 1253

Published Electronically:

June 6, 2019