Operation and Maintenance of Corrosion Protection

PURPOSE: This rule contains the requirements for corrosion protection systems. 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) All owners and operators of metal underground storage tank (UST) systems with corrosion protection must comply with the following requirements to ensure that releases due to corrosion are prevented until the system is permanently closed or has an out-ofuse site assessment conducted in accordance with 10 CSR 26-2.060 through 10 CSR 262.064. (A) All corrosion protection systems must be operated and maintained to continuously provide corrosion protection to the metal components of that portion of the tank and piping that routinely contain regulated substances and are in contact with an electrolyte, including, but not limited to, soil, backfill, and/or water. (B) All UST systems equipped with cathodic protection systems must be inspected for proper operation by a NACE International certified, Steel Tank Institute certified, or International Code Council (ICC) appropriately certified cathodic protection tester in accordance with the following requirements: 1. Frequency. To confirm that the system is operating properly and providing adequate protection, all cathodic protection systems must be tested within six (6) months of installation and at least triennially after that, or according to another reasonable time frame established by the department; and 2. Inspection criteria. The criteria that are used to determine that cathodic protection (CP) is adequate as required by this section must be in accordance with a code of practice developed by a nationally-recognized association listed in section (2) of this rule. A. Inspection reports must document the testing method used, the testing standard referenced, the CP tester, and the CP tester’s qualifications. B. Inspection reports must include a site sketch, potential readings, and the location where the readings were made. C. For impressed current systems, the inspection report must document continuity data and how voltage (IR) drops other than those across the structure/electrolyte interface were considered or accounted for in determining adequate protection. (C) UST systems with impressed current cathodic protection systems must also be inspected every sixty (60) days to ensure the equipment is running properly. 1. Rectifier log reports must include relevant system data, including, but not limited to, amperage readings, voltage readings, hour meter, and indicator light, where available. 2. Any indication of deviations from previous rectifier logs or rectifier readings or the most recent cathodic protection system inspection of the rectifier or cathodic protection system, such as variances in current reading or indicator light, must be appropriately investigated. (D) For UST systems using cathodic protection, records of the operation of the cathodic protection system must be maintained in accordance with 10 CSR 26-2.034 to demonstrate compliance with the performance standards in this rule. These records must provide the following: 1. The results of the last three (3) inspections required in subsection (1)(C) of this rule; and 2. The results of testing from the last two (2) inspections required in subsection (1)(B) of this rule. (2) The following codes and standards may be used to comply with this rule: (A) 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; (B) NACE International TM0101-2001, Standard Test Method, Measurement Techniques Related to Criteria for Cathodic Protection on Underground or Submerged Metallic Tank Systems, 2001 edition. 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; (C) NACE International SP-0169-2007, Control of External Corrosion on Submerged Metallic Piping Systems, revised 2007. 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; (D) NACE International TM0497-2012, Measurement Techniques Related to Criteria for Cathodic Protection on Underground or Submerged Metallic Piping Systems, revised 2012. 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; (E) Steel Tank Institute Cathodic Protection Testing Procedures for sti-P3 USTs, R051, January 2006. This document is incorporated by reference without any later amendments or modifications. To obtain a copy, contact the Steel Tank Institute, 944 Donata Court, Lake Zurich, IL 60047, (708) 438-8265, www.steeltank.com; (F) Steel Tank Institute Recommended Practice for the Addition of Supplemental Anodes to sti-P3 USTs, R972, December 2010. This document is incorporated by reference without any later amendments or modifications. To obtain a copy, contact the Steel Tank Institute, 944 Donata Court, Lake Zurich, IL 60047, (708) 438-8265, www.steeltank.com; or (G) Steel Tank Institute Recommended Practice for Corrosion Protection of Underground Piping Networks Associated with Liquid Storage and Dispensing Systems, R892, Revised January 2006. To obtain a copy, contact the Steel Tank Institute, 944 Donata Court, Lake Zurich, IL 60047, (708) 4388265, www.steeltank.com. (3) If cathodic protection is being used to protect all or part of a UST system from corrosion, and the electric system energizing the cathodic protection has been off, unhooked, or damaged for more than ninety (90) days, the owner/operator must— (A) Conduct a tank integrity test, documenting adequate tank shell integrity and thickness, as required in 10 CSR 262.021(3)(B); and (B) Have a corrosion expert or design engineer re-evaluate the UST system, cathodic protection system, and surrounding structures and design and/or make changes to the existing cathodic protection system to meet the standards in 10 CSR 26-2.020(1)(A)2.B.– D.; (C) Replace metal piping components; (D) The owner/operator may request an additional ninety (90) days to repair the systems by submitting a request, including the justification for the extension; or (E) Permanently close the tank, in accordance with 10 CSR 26-2.060 through 10 CSR 26-2.064. (4) If a cathodic protection system test indicates that the system is not operating properly or does not provide adequate protection, as defined by the testing method used, and the system is not repaired or does not pass a retest within ninety (90) days, or if a required Substance Storage Tanks cathodic protection system test is not conducted, the owner/operator must comply with the requirements outlined in section (3) of this rule. AUTHORITY: sections 319.105, 319.107, and 319.137, RSMo 2016.* This rule originally filed as 10 CSR 20-10.031. Original rule filed April 2, 1990, effective Sept. 28, 1990. Moved and amended: Filed April 15, 2011, effective Dec. 30, 2011. Amended: Filed Aug. 15, 2016, effective May 30, 2017. *Original authority: 319.105, RSMo 1989; 319.107, RSMo 1989, amended 1994; and 319.137, RSMo 1989, amended 1993, 1995, 2004.