1. A. An owner and an operator of a UST system shall conduct repairs that:

   1. (1) Prevent spills, releases, and discharges due to structural failure or corrosion for the entire period in which a UST system is used to store regulated substances;
   2. (2) Comply with the applicable code of practices developed by a nationally recognized association incorporated by reference under COMAR 26.10.01.03; and
   3. (3) Meet all of the requirements of this chapter.
2. B. An owner and an operator of a UST system shall have repairs to the equipment and components of the UST system performed or supervised by a UST system technician certified in accordance with COMAR 26.10.06.

3. C. Repair Procedures. An owner and an operator of a UST system:

   1. (1) Upon approval of the Department, shall have repairs conducted on a fiberglass-reinforced plastic or steel UST:

      1. (a) By an authorized representative of the UST manufacturer; or
      2. (b) In accordance with a code of practice developed by a nationally recognized association incorporated by reference under COMAR 26.10.01.03;
   2. (2) May not repair a UST by installing an internal liner;

   3. (3) Shall replace a metal pipe that has sections or fittings in which corrosion or other damage has resulted in:

      1. (a) A spill, release, or discharge of a regulated substance; or
      2. (b) An imminent threat of a spill, release, or discharge of a regulated substance, as determined by the Department;
   4. (4) Shall repair non-corrodible pipes and fittings in accordance with the manufacturer’s specifications; and
   5. (5) Shall repair a containment sump with materials rated by the material manufacturer for the regulated substance stored in the UST system.

4. D. Testing of Repaired UST Systems. An owner and an operator of a repaired UST system shall:

   1. (1) Before placing the UST system back into service, conduct a precision tightness test in accordance with COMAR 26.10.03.05 to test the repaired UST and piping;

   2. (2) Before placing the UST system back into service, test secondary containment areas of the UST, piping, and containment sumps in accordance with:

      1. (a) The manufacturer’s instructions;
      2. (b) A code of practice developed by a nationally recognized association incorporated by reference under COMAR 26.10.01.03; or
      3. (c) Requirements established by the Department; and

   3. (3) Within 6 months of completing a repair on a cathodically protected UST system, test the cathodic protection system:

      1. (a) To ensure the cathodic protection system is operating properly; and
      2. (b) In accordance with Regulation .02B of this chapter.
5. E. Recordkeeping. In accordance with Regulation .05 of this chapter, an owner and an operator of a UST system shall maintain records of each repair conducted on the UST system until the UST system is permanently closed or undergoes a change-in-service pursuant to COMAR 26.10.10.02.

Authority: Environment Article, §§4-401, 4-402, 4-405, 4-407—4-411.2, 4-415.1, 4-417, 4-701 et seq., and 7-201 et seq., Annotated Code of Maryland

Effective date: February 4, 1991 (18:2 Md. R. 151)

Chapter revised effective November 4, 1996 (23:22 Md. R. 1498)

Regulation .01 amended effective January 16, 2006 (33:1 Md. R. 39)

Regulation .01F amended as an emergency provision effective July 5, 2006 (33:16 Md. R. 1363); emergency status expired December 31, 2006

Regulation .02F, G amended effective February 18, 2002 (29:3 Md. R. 224)

Regulation .04 amended effective January 12, 2009 (36:1 Md. R. 25)

Regulation .05C amended effective January 16, 2006 (33:1 Md. R. 39)

Regulation .05D amended effective February 18, 2002 (29:3 Md. R. 224)

Regulations .01—.05 repealed and new Regulations .01—.05 adopted effective June 13, 2022 (49:12 Md. R. 642)