PURPOSE: This rule contains the options for upgrading existing underground storage tanks for continued operation after December 22, 1998.

PUBLISHER’S NOTE: The secretary of state has determined that the publication of the entire text of the material which is incorporated by reference as a portion of this rule would be unduly cumbersome or expensive. This material as incorporated by reference in this rule shall be maintained by the agency at its headquarters and shall be made available to the public for inspection and copying at no more than the actual cost of reproduction. This note applies only to the reference material. The entire text of the rule is printed here.

1. (1) Alternatives Allowed. All underground storage tank (UST) systems which are in-use must comply with one (1) of the following requirements:

   1. (A) New UST system performance standards in 10 CSR 26-2.020; or
   2. (B) The upgrading requirements in sections (3)–(5) of this rule.
2. (2) Any UST which was not permanently closed by being removed or filled with an inert, solid material before December 22, 1988, and that does not meet the requirements of section (1) shall be permanently closed in accordance with the requirements in 10 CSR 26-2.060 through 10 CSR 26-2.064. If the UST was taken out of operation by Substance Storage Tanks

August 28, 1989, but is still in the ground, the person or party responsible for permanently closing the UST is/are the person(s) who owned the UST immediately before the discontinuation of its use.

1. (3) Tank Upgrading Requirements. Tanks must be upgraded to meet one (1) of the following requirements in accordance with a code of practice developed by a nationallyrecognized association or independent testing laboratory:

   1. (A) Interior lining. A tank may be upgraded by internal lining if—

      1. 1. The lining is installed in accordance

with the requirements of 10 CSR 26-2.033 and the following:

1. A. Lining manufacturer installation

requirements; and

1. B. An approved national code or stan-

dard, including those listed in section (6) of this rule; and either

1. C. For steel tanks, structural integrity

determinations are required and must include actual steel tank thickness readings. Approved integrity test methods are included in section (6) of this rule; or

1. D. For fiberglass-reinforced plastic

tanks, all linings must be approved by the tank manufacturer and installed in accordance with the tank manufacturer’s requirements;

1. 2. Within ten (10) years after the initial

lining, and every five (5) years after that, whether relined or not, the lined tank is internally inspected and found to be structurally sound with the lining still performing in accordance with original design specifications; and

1. 3. A tank may only be relined and/or the

lining may only be repaired—

1. A. If the fiberglass-reinforced plastic

tank meets all tank manufacturer standards for repair or relining of the tank; or

1. B. If the steel tank passes an integrity

test, including actual steel shell thickness readings. Approved integrity test methods are included in section (6) of this rule;

1. (B) Cathodic Protection. A tank may be upgraded by cathodic protection if the cathodic protection system meets the requirements of the performance standards for new UST systems in 10 CSR 26-2.020(1)(A)2.B.–D. and the integrity of the tank is ensured using one

1. (1) of the following methods:

   1. 1. The tank is internally inspected and

assessed to ensure that the tank is structurally sound and free of corrosion holes prior to installing the cathodic protection system. Structural integrity evaluations must include steel shell thickness readings and confirmation that the steel shell does not have any holes or perforations. Approved integrity test methods are included in section (6) of this rule;

1. 2. The tank has been installed for less

than ten (10) years and is monitored monthly for releases in accordance with release detection methods in 10 CSR 26-2.043(1)(E)–(I);

1. 3. The tank has been installed for less

than ten (10) years and is assessed for corrosion holes by conducting two (2) tightness tests that meet the requirement of release detection method in 10 CSR 26-2.043(1)(D). The first tightness test must be conducted prior to installing the cathodic protection system. The second tightness test must be conducted between three and six (3–6) months following the first operation of the cathodic protection system; or

1. 4. The tank is assessed for corrosion

holes by a method that is determined by the department to prevent releases in a manner that is no less protective of human health and the environment than paragraphs (3)(B)1.–3. of this rule; and

1. (C) Internal Lining Combined With Cathodic Protection. A tank may be upgraded by both internal lining and cathodic protection if—

   1. 1. The lining is installed in accordance

with the requirements of 10 CSR 26-2.033; and

1. 2. The cathodic protection system meets

the requirements of 10 CSR 26- 2.020(1)(A)2.B.–D.

1. (4) Piping Upgrading Requirements. Metal piping that routinely contains regulated substances and is in contact with an electrolyte, including but not limited to soil, backfill, and/or water, must be cathodically protected in accordance with a code of practice developed by a nationally-recognized association or independent testing laboratory and must meet the requirements of 10 CSR 26- 2.020(1)(B)3.B.–D.

   1. (A) New piping installed at an existing facility must comply with the requirements of 10 CSR 26-2.020.
2. (5) Spill and Overfill Prevention Equipment. To prevent spilling and overfilling associated with product transfer to the UST system, all existing UST systems must comply with new UST system spill and overfill prevention equipment requirements specified in 10 CSR 26-2.020(1)(C).

3. (6) The following codes and standards may be used to comply with this rule:

   1. (A) American Petroleum Institute Standard 1631, Interior Lining and Periodic Inspection of Underground Storage Tanks, revised 2001. This document is incorporated by reference without any later amendments or modifications. To obtain a copy, contact the American Petroleum Institute, 1220 L Street NW, Washington, DC 20005, (202) 682-8000, www.api.org/standards/;
   2. (B) NACE International RP 0285-2002, Corrosion Control of Underground Storage Tank Systems by Cathodic Protection, revised 2002. This document is incorporated by reference without any later amendments or modifications. To obtain a copy, contact NACE International, Box 218340, Houston, TX 77218-8340, (713) 492-0535, www.nace.org;
   3. (C) American Petroleum Institute Publication 1632, Cathodic Protection of Underground Petroleum Storage Tanks and Piping Systems, revised 2002. This document is incorporated by reference without any later amendments or modifications. To obtain a copy, contact the American Petroleum Institute, 1220 L Street NW, Washington, DC 20005, (202) 682-8000, www.api.org/standards/;
   4. (D) American Society for Testing and Materials G158-98 (2010) Standard Guide for Three Methods of Assessing Buried Steel Tanks, revised 2010, Method B only. Methods A and C may not be used to evaluate the integrity of a steel tank. This document is incorporated by reference without any later amendments or modifications. To obtain a copy, contact the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959,

4. (610) 832-9500, www.astm.org; and

   1. (E) National Leak Prevention Association Standard 631, Spill Prevention, Minimum 10 Year Life Extension of Existing Steel Underground Tanks by Lining Without the Addition of Cathodic Protection, revised 1999. This standard may only be used for interior lining application and inspection, not for inspection of the steel tank integrity. This document is incorporated by reference without any later amendments or modifications. To obtain a copy, contact the National Leak Prevention Association, (815) 301-2785, www.nlpa-online.org.

AUTHORITY: sections 319.105 and 319.107, RSMo 2000, and section 319.137, RSMo Supp. 2010.* This rule originally filed as 10 CSR 20-10.021. Original rule filed April 2, 1990, effective Sept. 28, 1990. Moved and amended: Filed April 15, 2011, effective Dec. 30, 2011. *Original authority: 319.105, RSMo 1989; 319.107, RSMo 1989, amended 1994; and 319.137, RSMo 1989, amended 1993, 1995, 2004. 10 CSR 26-2