17.56.302    OPERATION AND MAINTENANCE OF CORROSION PROTECTION

(1) All owners and operators of metal UST systems with corrosion protection shall comply with the following requirements to ensure that releases due to corrosion are prevented until the UST system is permanently closed or undergoes a change-in-service pursuant to ARM Title 17, chapter 56, subchapter 7:

(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 are in contact with the ground;

(b) all UST systems equipped with cathodic protection systems must be inspected for proper operation by a qualified cathodic protection tester in accordance with the following requirements:

(i) all cathodic protection systems must be tested within six months of installation and at least every three years thereafter; and

(ii) the criteria that are used to determine that cathodic protection is adequate as required by this rule must be in accordance with one of the codes of practice listed in (2);

(c) UST systems with impressed current cathodic protection systems must also be inspected every 60 days to ensure the equipment is running properly; and

(d) for UST systems using cathodic protection, records of the operation of the cathodic protection must be maintained in accordance with ARM 17.56.305 to demonstrate compliance with the performance standards in this rule. These records must provide the following:

(i) the results of the last three inspections required in (1)(c); and

(ii) the results of testing from the last two inspections required in (1)(b).

(2) The department adopts and incorporates by reference the version in effect on January 1, 2018, of the following standards and test methods:

(a) NACE International Test Method TM 0101, "Measurement Techniques Related to Criteria for Cathodic Protection of Underground Storage Tank Systems," a copy of which may be obtained from NACE International, P.O. Box 201009, Houston, TX 77216-1009, (281) 228-6200;

(b) NACE International Test Method TM0497, "Measurement Techniques Related to Criteria for Cathodic Protection on Underground or Submerged Metallic Piping Systems," a copy of which may be obtained from NACE International, P.O. Box 201009, Houston, TX 77216-1009, (281) 228-6200;

(c) Steel Tank Institute Recommended Practice R051, "Cathodic Protection Testing Procedures for STI-P3� USTs," a copy of which may be obtained from the Steel Tank Institute, 570 Oakwood Road, Lake Zurich, IL 50047, (800) 438-8265;

(d) NACE International Standard Practice SP 0285, "External Control of Underground Storage Tank Systems by Cathodic Protection," a copy of which may be obtained from NACE International, P.O. Box 201009, Houston, TX 77216-1009, (281) 228-6200; or

(e) NACE International Standard Practice SP 0169, "Control of External Corrosion on Underground or Submerged Metallic Piping Systems," a copy of which may be obtained from NACE International, P.O. Box 201009, Houston, TX 77216-1009, (281) 228-6200.

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History: 75-11-505, MCA; IMP, 75-11-505, MCA; NEW, 1989 MAR p. 1912, Eff. 11/23/89; TRANS, from DHES, 1995 MAR p. 2259, Eff. 7/1/95; AMD, 2003 MAR p. 1079, Eff. 5/23/03; AMD, 2007 MAR p. 1189, Eff. 8/24/07; AMD, 2010 MAR p. 1888, Eff. 8/27/10; AMD, 2016 MAR p. 1694, Eff. 9/24/16; AMD, 2018 MAR p. 1954, Eff. 10/6/18.