(1) Owners and operators of UST systems shall ensure that repairs will prevent releases due to structural failure or corrosion for as long as the UST system is used to store regulated substances. Owners and operators shall receive a permit from the department prior to making any repair of an UST system. (2) Tanks not meeting the design or construction standards of the applicable code of practice in (4) may not be repaired and must be closed in accordance with ARM 17.56.702.(3) Repairs must meet the following requirements: (a) repairs to UST systems must be conducted in accordance with all applicable state, federal, and local laws and regulations and the applicable code of practice in (4). If there is a conflict in the referenced codes, the more stringent and protective code applies; (b) tanks must be repaired according to the manufacturer's recommendation and under the supervision on site of a manufacturer's authorized representative or the tank manufacturer shall certify that the repaired tank meets the manufacturer's design standards; (c) the tank manufacturer shall re-warranty the repaired tank for ten years or the remainder of the original warranty period, whichever is longer; (d) the department may require excavation of the tank to be repaired so that the outer wall of the tank may be inspected and tested for defects;(e) metal pipe sections and fittings that are damaged or have released product as a result of corrosion or other damage must be replaced;(f) upon completion of the repair and before the UST system is placed in service, the following tests must be performed: (i) repaired tanks and piping must be tightness tested in accordance with ARM 17.56.407(1)(c) and 17.56.408(1)(b); (ii) corrosion protection systems circuitry must be tested to ensure it is still functioning; and(iii) repairs to secondary containment areas of tanks and piping used for interstitial monitoring and to containment sumps used for interstitial monitoring of piping must have the secondary containment tested for tightness within 30 days following the date of completion of the repair according to one of the following:(A) the manufacturer's instructions;(B) a code of practice developed by a nationally recognized association or independent testing laboratory; or(C) according to requirements established by the department.(g) within six months following the repair of any cathodically protected UST system, the cathodic protection system must be tested in accordance with ARM 17.56.302(1)(b) and (c) to ensure that it is operating properly;(h) within 30 days following any repair to spill or overfill prevention equipment, the repaired spill or overfill prevention equipment must be tested or inspected, as appropriate, in accordance with [17.56.306 ]; and(i) UST system owners and operators must maintain records (in accordance with ARM 17.56.305 ) of each repair until the UST system is permanently closed or undergoes a change-in-service pursuant to ARM Title 17, chapter 56, subchapter 7.(4) The department adopts and incorporates by reference the version in effect on January 1, 2018, of the following standards or specifications:(a) Underwriters Laboratories Standard 1316, "Standard for Glass-Fiber-Reinforced Plastic Underground Storage Tanks for Petroleum Products," which sets forth requirements for the manufacture and installation of glass-fiber-reinforced plastic underground storage tanks for petroleum products, a copy of which may be obtained from Underwriters Laboratories, Inc., 12 Laboratory Drive, Research Triangle Park, NC 27709;(b) Underwriters Laboratories Standard 1746, "Corrosion Protection Systems for Underground Storage Tanks," which sets forth requirements for corrosion protection systems for underground storage tanks, a copy of which may be obtained from Underwriters Laboratories, Inc., 12 Laboratory Drive, Research Triangle Park, NC 27709;(c) American Petroleum Institute Recommended Practice RP 2200, "Repairing Crude Oil, Liquified Petroleum Gas, and Product Pipelines," which sets forth guidelines and safe practices for in-service pipeline repairs for hazardous liquids, a copy of which may be obtained from Global Engineering Documents, 15 Inverness Way East, M/S C303B, Englewood, CO 80112-5776, (303) 397-7956;(d) Steel Tank Institute, "Specification for STI-P3 System of External Corrosion Protection of Underground Steel Storage Tanks," which sets forth design and installation standards of cathodically protected steel underground storage tanks, a copy of which may be obtained from the Steel Tank Institute, 570 Oakwood Road, Lake Zurich, IL 60047, (800) 438-8265;(e) Steel Tank Institute Recommended Practice R972, "Recommended Practice for the Addition of Supplemental Anodes to STI-P3® Tanks," which sets forth standards for the addition of supplemental anodes to STI-P3® Tanks, a copy of which may be obtained from the Steel Tank Institute, 570 Oakwood Road, Lake Zurich, IL 60047, (800) 438-8265;(f) American Petroleum Institute Recommended Practice RP 1631, "Interior Lining and Periodic Inspection of Underground Storage Tanks," which sets forth recommendations for the interior lining of existing steel and fiberglass reinforced plastic underground tanks used to store petroleum-based motor fuels and middle distillates, a copy of which may be obtained from Global Engineering Documents, 15 Inverness Way East, M/S C303B, Englewood, CO 80112-5776, (303) 397-7956;(g) National Leak Prevention Association Standard 631, "Entry, Cleaning, Interior Inspection, Repair, and Lining of Underground Storage Tanks," which sets forth standards for cleaning, interior inspection, repair and lining of underground storage tanks, a copy of which may be obtained from the National Leak Prevention Association, 7685 Fields Ertel Road, Cincinnati, OH 45241, (800) 543-1838;(h) National Fire Protection Association Standard 30, "Flammable and Combustible Liquids Code," which sets forth transferring and dispensing practices for flammable and combustible liquids, a copy of which may be obtained from the National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269, (800) 344-3555;(i) NACE International Standard Practice SP 0285, "External Control of Underground Storage Tank Systems by Cathodic Protection," which sets forth methods and practices for achieving effective 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;(j) Fiberglass Tank and Pipe Institute Recommended Practice T-95-02, "Remanufacturing of Fiberglass Reinforced Plastic (FRP) Underground Storage Tanks," which sets forth requirements and procedures for the remanufacture of existing fiberglass reinforced plastic (FRP) underground storage tanks or FRP tanks damaged prior to installation, a copy of which may be obtained from the Fiberglass Tank and Pipe Institute, 8252 S. Harvard Avenue, Suite 102, Tulsa, OK 74137 (918) 809-6292;(k) Steel Tank Institute Recommended Practice R012, "Recommended Practice for Interstitial Tightness Testing of Existing Underground Double Wall Steel Tanks," which sets forth standards for interstitial tightness of existing underground double wall steel tanks, a copy of which may be obtained from the Steel Tank Institute, 570 Oakwood Road, Lake Zurich, IL 60047, (800) 438-8265;(l) Fiberglass Tank and Pipe Institute Protocol, "Field Test Protocol for Testing the Annular Space of Installed Underground Fiberglass Double and Triple-Wall Tanks with Dry Annular Space - RP 2007-2," which sets forth field integrity testing of the dry annular space of double or triple wall underground fiberglass storage tanks, a copy of which may be obtained from the Fiberglass Tank and Pipe Institute, 8252 S. Harvard Avenue, Suite 102, Tulsa, OK 74137 (918) 809-6292; and(m) Petroleum Equipment Institute Recommended Practice RP1200, "Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities," which sets forth general guidelines for the inspection and testing of leak detection, release prevention and overfill prevention equipment at UST facilities, a copy of which may be obtained from the Petroleum Equipment Institute, P.O. Box 2380, Tulsa, OK 74101, (918) 494-9696.Mont. Admin. r. 17.56.304
NEW, 1989 MAR p. 1912, Eff. 11/23/89; TRANS, from DHES, 1995 MAR p. 2259; AMD, 1999 MAR p. 2046, Eff. 9/24/99; 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. 9/24/2016; AMD, 2018 MAR p. 1954, Eff. 10/6/2018AUTH: 75-11-505, MCA; IMP: 75-11-505, MCA