Repairs are allowed to AST systems if the following requirements are met:

1. (1) A tank interior may be repaired and relined if the owners or operators document the following in writing:

   1. (a) All repairs are permanent and the tank meets new AST standards specified in §§ 74:56:03:07 and 74:56:03:08;
   2. (b) The tank and the internal liners and coatings are compatible with the regulated substance stored;
   3. (c) The tank was inspected internally;
   4. (d) All welds and patches are installed in accordance to accepted industry codes and practices, such as API Standard 1104 (1968);
   5. (e) Prior to repairs all sludges and sediment materials were removed from the tank and properly disposed of according to state and federal statutes;
2. (2) All piping and fittings being repaired shall be restored to equal to or better than original conditions. All piping and fittings must be tested in accordance with professional engineering practices to ensure adequacy of repairs prior to putting the systems back into service;

3. (3) All owners or operators must maintain records of any repairs performed on AST systems. Such records must be capable of demonstrating compliance with subdivisions (1) and (2) of this section.

   Reference: API Standard 1104, 1968 Edition, American Petroleum Institute. Copies may be obtained from the American Petroleum Institute, Publication and Distribution Section, 1220 L Street, Northwest, Washington, DC 20005-4070. Cost $30.

Source: 14 SDR 76, effective November 29, 1987; 18 SDR 62, effective October 10, 1991; transferred from § 74:03:30:16, July 1, 1996.

General Authority: SDCL 34A-2-93 , 34A-2-101.

Law Implemented: SDCL 34A-2-100 , 34A-2-101.