1. A. Owners and operators of UST systems with spill and overfill prevention equipment and containment sumps used for interstitial monitoring of piping shall meet these requirements to ensure the equipment is operating properly and will prevent releases to the environment:

   1. 1. Spill prevention equipment (such as a catchment basin, spill bucket, or other spill containment device) and containment sumps used for interstitial monitoring of piping shall prevent releases to the environment by meeting one of the following:

      1. a. The equipment is double walled and the integrity of both walls is periodically monitored at a frequency not less than the frequency of the walkthrough inspections described in R18-12-236. Owners and operators shall begin meeting subsection (A)(1)(b) and conduct a test within 30 days of discontinuing periodic monitoring of this equipment; or

      2. b. The spill prevention equipment and containment sumps used for interstitial monitoring of piping are tested at least once every three years to ensure the equipment is liquid tight by using vacuum, pressure, or liquid testing in accordance with one of the following criteria:

         1. i. Requirements developed by the manufacturer (Note: Owners and operators may use this option only if the manufacturer has developed requirements);
         2. ii. Code of practice developed by a nationally recognized association or independent testing laboratory; or
         3. iii. Requirements determined by the Department to be no less protective of human health and the environment than the requirements listed in subsections (A)(1)(b)(i) and (ii). The Department’s “Low Level Hydrostatic Testing for Underground Storage Tank Containment Sumps,” amended October 9, 2018, may be used to comply with this subsection (iii) if the system has automatic shutoff of dispenser or submersible pump, as appropriate, to prevent further regulated substances from entering the sump.

   2. 2. Overfill prevention equipment shall be inspected at least once every three years. At a minimum, the inspection shall ensure that overfill prevention equipment is set to activate at the correct level specified in R18-12-220(D) and will activate when regulated substance reaches that level. Inspections shall be conducted in accordance with one of the criteria in subsections (A)(1)(b)(i) through (iii).

      The following code of practice may be used to comply with subsections (A)(1)(b) and (A)(2): Petroleum Equipment Institute Publication RP1200-17, “Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities”.

2. B. Owners and operators shall begin meeting these requirements as follows:

   1. 1. For UST systems in use on or before January 1, 2020, the initial spill prevention equipment test, containment sump test and overfill prevention equipment inspection shall be conducted not later than March 1, 2020.
   2. 2. For UST systems brought into use after January 1, 2020, these requirements apply at installation.

   3. 3. Owners and operators shall maintain records as follows (in accordance with R18-12-234) for spill prevention equipment, containment sumps used for interstitial monitoring of piping, and overfill prevention equipment:

      1. a. All records of testing or inspection shall be maintained for three years; and
      2. b. For spill prevention equipment and containment sumps used for interstitial monitoring of piping not tested every three years, documentation showing that the prevention equipment is double walled and the integrity of both walls is periodically monitored shall be maintained for as long as the equipment is periodically monitored.

Historical Note

New Section made by final rulemaking at 25 A.A.R. 3123, effective January 1, 2020 (Supp. 19-4).