Missouri Code of State Regulations › Title 10 - DEPARTMENT OF NATURAL RESOURCES › Division 26 - Petroleum and Hazardous Substance Storage Tanks › Chapter 2 - Underground Storage Tanks-Technical Regulations › Section 10 CSR 26-2.031 - Operation and Maintenance of Corrosion Protection

Current through Register Vol. 49, No. 14, July 15, 2024
PURPOSE: There are two (2) primary purposes for this
				  rulemaking. The first is to open UST rules in Title 10, Division 26 of the Code
				  of State Regulations to make the necessary changes required by the U.S.
				  Environmental Protection Agency (EPA). The 2005 Energy Policy Act required
				  either financial responsibility for UST installers and manufacturers or
				  secondary containment for all new systems. In addition, last October, EPA
				  adopted changes to the federal UST regulations that need to be incorporated
				  into state regulation. This rule-making will make the necessary changes to
				  comply with these EPA grant requirements and to incorporate the changes made to
				  the federal regulations.
The second reason is to incorporate state-specific
				  changes. The proposed changes would better ensure that old tanks are still
				  functional enough to remain in use. The department will also take this
				  opportunity to clarify ambiguous or confusing language and update industry
				  standard referenced in the regulations.
(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-of-use site
				assessment conducted in accordance with
				10 CSR
				26-2.060 through
				10 CSR 26-2.064.
(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.