(1) No later than December 22, 1998, all existing UST systems must comply with one of the following requirements:

(a) new UST system performance standards under ARM 17.56.201;

(b) the upgrading requirements in (2) through (4) ; or

(c) closure requirements under subchapter 7, including applicable requirements for corrective action under subchapter 6.

(2) Steel tanks must be upgraded to meet any one of the following requirements in accordance with all of the standards adopted by reference in (5) :

(a) a tank may be upgraded by internal lining if:

(i) the lining is installed in accordance with the requirements of ARM 17.56.304, and

(ii) within 10 years after lining, and every five years thereafter, the lined tank is internally inspected and found to be structurally sound with the lining still performing in accordance with original design specifications.

(b) a tank may be upgraded by cathodic protection if the cathodic protection system meets the requirements of ARM 17.56.201(1) (a) (ii) (B) , (C) and (D) and the integrity of the tank is ensured using one of the following methods:

(i) 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; or

(ii) the tank has been installed for less than 10 years and is monitored monthly for releases in accordance with ARM 17.56.407(1) (d) through (g) ; or

(iii) the tank has been installed for less than 10 years and is assessed for corrosion holes by conducting two tightness tests that meet the requirements of ARM 17.56.407(1) (c) . 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 months following the first operation of the cathodic protection system.

(c) A tank may be upgraded by both internal lining and cathodic protection if:

(i) the lining is installed in accordance with the requirements of ARM 17.56.304; and

(ii) the cathodic protection system meets the requirements of ARM 17.56.201(1) (a) (ii) (B) , (C) and (D) .

(3) Metal piping that may contain regulated substances, including vent lines and fill lines, and is in contact with the ground, must be cathodically protected in accordance with all of the standards adopted by reference in ARM 17.56.201(1) (j) and must meet the requirements of ARM 17.56.201(1) (b) (ii) (B) , (C) and (D) .

(4) 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 ARM 17.56.201(1) (c) .

(5) The department hereby adopts and incorporates by reference:

(a) American Petroleum Institute Publication 1631, "Recommended Practice for the Interior Lining of Existing Steel Underground Storage Tanks" which sets forth repair and lining of standards for UST systems and a copy of which may be obtained from API Publications Department, 1220 L Street NW, Washington, DC 20005, (202) 682-8375;

(b) 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" which sets forth repair and lining standards for UST systems and a copy of which may be obtained from National Leak Prevention Association, 7685 Sields Ertel Road, Cincinnati, OH 45241, (800) 543-1838;

(c) National Association of Corrosion Engineers Standard RP0285-2002, "Corrosion Control of Underground Storage Tank Systems by Cathodic Protection" which sets forth cathodic protection standards for buried or submerged metallic liquid storage systems, a copy of which may be obtained from NACE, International, PO Box 201009, Houston, TX 77216-1009, (281) 228-6200; and

(d) American Petroleum Institute Publication 1632, "Cathodic Protection of Underground Petroleum Storage Tanks and Piping Systems" which sets forth cathodic protection standards for UST systems and a copy of which may be obtained from API Publications Department, 1220 L Street NW, Washington, DC 20005, (202) 682-8375. (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; AMD , 2003 MAR p. 1079, Eff. 5/23/03.)

17.56.203 ADDITIONAL PERFORMANCE STANDARDS FOR NEW UNDERGROUND PIPING CONNECTED TO ABOVEGROUND TANKS OR TO UNDERGROUND TANKS NOT LOCATED AT A FARM OR RESIDENCE WITH A CAPACITY OF 1100 GALLONS OR LESS USED TO STORE HEATING OIL

(1) Primary underground piping connected to above ground tanks or to underground tanks with a capacity of 660 gallons or less used exclusively to store heating oil for consumptive use on the premises where stored may be constructed of copper provided that the piping is enclosed in secondary containment consistent with these rules.

(2) In addition to cathodically protected steel or non-metallic pipe listed for use with petroleum products and/or motor fuels, schedule 40 or greater PVC pipe and fittings may be used to provide secondary containment for heating oil tank systems subject to this rule provided that only adhesives resistant to petroleum products are used to bond PVC joints.

(3) If liquid or vapor sensors are not used to monitor the interstitial space for a release, the piping system must be installed so that any liquid released into the interstitial space will not move more than 20 feet before being visually detected in a sump or standpipe.