PURPOSE: This rule contains the requirements for testing the newly required containment sumps associated with underground storage tank systems.

PUBLISHER’S NOTE: The secretary of state has determined that the publication of the entire text of the material which is incorporated by reference as a portion of this rule would be unduly cumbersome or expensive. This material as incorporated by reference in this rule shall be maintained by the agency at its headquarters and shall be made available to the public for inspection and copying at no more than the actual cost of reproduction. This note applies only to the reference material. The entire text of the rule is printed here.

1. (1) Owners and operators of underground storage tank (UST) systems with containment sumps required by 10 CSR 26-2.020 and/or 10 CSR 26-2.021, must ensure the continued integrity of required containment sumps by meeting one (1) of the following requirements:

   1. (A) The containment sump has at least two

2. (2) walls and an interstitial space and the integrity of two (2) walls is interstitially monitored annually; or

   1. (B) The containment sump primary wall is tested at least triennially to ensure the equipment is liquid-tight by using vacuum, pressure, or liquid testing.

3. (2) The testing and/or monitoring required by this rule must be conducted in accordance with one (1) of the following:

   1. (A) A tightness test developed and published by the manufacturer (Note: Owners and operators may use this option only if the manufacturer has developed testing requirements.);
   2. (B) An interstitial test or containment sump test listed by the National Work Group on Leak Detection Evaluations. To obtain copies of equipment listings, contact the National Work Group on Leak Detection Evaluations, www.nwglde.org; or
   3. (C) Petroleum Equipment Institute RP 1200-12, Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities. This document is incorporated by reference without any later amendments or modifications. To obtain a copy, contact the Petroleum Equipment Institute, Box 2380, Tulsa, OK 74101-2380,

4. (918) 494- 9696, www.pei.org; or

   1. (D) Another method approved by department, including code(s) of practice developed by a nationally recognized association(s) or independent testing laboratory(ies), determined to be no less protective of human health and the environment than the requirements listed in subsections (A) through (C) of this section.
5. (3) Owners and operators must maintain record(s) of the required containment sump monitoring for twelve (12) months or test(s) required by this rule until the next test is performed.

AUTHORITY: sections 319.105, 319.107, and 319.137, RSMo 2016.* Original rule filed Aug. 15, 2016, effective May 30, 2017. *Original authority: 319.105, RSMo 1989; 319.107, RSMo 1989, amended 1994; and 319.137, RSMo 1989, amended 1993, 1995, 2004.