PURPOSE: This rule describes methods for repair of underground storage tank systems.

Editor’s Note: The secretary of state has determined that the publication of this rule in its entirety would be unduly cumbersome or expensive. The entire text of the material referenced has been filed with the secretary of state. This material may be found at the Office of the Secretary of State or at the headquarters of the agency and is available to any interested person at a cost established by state law.

1. (1) Owners and operators of underground storage tank (UST) systems must ensure that repairs will prevent releases due to structural failure or corrosion as long as the UST system is used to store regulated substances.

2. (2) The repairs must meet the following requirements:

   1. (A) Repairs to UST systems must be properly conducted in accordance with a code of practice developed by a nationally recognized association or an independent testing laboratory.

      1. 1. The following codes and standards

may be used to comply with subsection (2)(A) of this rule:

1. A. National Fire Protection Associa-

tion Standard 30, Flammable and Combustible Liquids Code;

1. B. American Petroleum Institute

Publication 2200, Repairing Crude Oil, Liquefied Petroleum Gas, and Product Pipelines;

1. C. American Petroleum Institute

Publication 1631, Recommended Practice for the Interior Lining of Existing Steel Underground Storage Tanks; and

1. D. National Leak Prevention Associ-

ation Standard 631, Spill Prevention, Minimum 10-Year Life Extension of Existing Steel Underground Tanks by Lining Without the Addition of Cathodic Protection;

1. (B) Repairs to fiberglass-reinforced plastic tanks may be made by the manufacturer’s authorized representatives or in accordance with a code of practice developed by a nationally-recognized association or an independent testing laboratory;
2. (C) Metal pipe sections and fittings that have released product as a result of corrosion or other damage must be replaced. Fiberglass pipes and fittings may be repaired in accordance with the manufacturer’s specifications;
3. (D) Repaired tanks and piping must be tightness tested in accordance with release detection methods 10 CSR 20-10.043(1)(C) and 10 CSR 20-10.044(1)(B) within thirty

1. (30) days following the date of the completion of the repair, except as provided in the following paragraphs—

   1. 1. The repaired tank is internally

inspected in accordance with a code of practice developed by a nationally-recognized association or an independent testing laboratory;

1. 2. The repaired portion of the UST sys-

tem is monitored monthly for releases by one (1) of the release detection methods in 10 CSR 20-10.043(1)(D)–(H); or

1. 3. Another test method is used that is

determined by the department to be no less protective of human health and the environment than those listed in paragraphs (2)(D)1. and 2.;

1. (E) Within six (6) months following the repair of any cathodically protected UST system, the cathodic protection system must be tested with the methods for operation and maintenance of corrosion protection in 10 CSR 20-10.031(1)(B) and (C) to ensure that it is operating properly; and
2. (F) UST system owners and operators must maintain records of each repair for the remaining operating life of the UST system that demonstrate compliance with the requirements of this rule. AUTHORITY: sections 319.105, RSMo Supp. 1989 and 644.041, RSMo 1986.* Original rule filed April 2, 1990, effective Sept. 28, 1990. *Original authority: 319.105, RSMo 1989 and 644.041, RSMo 1972, amended 1973.