Mississippi Administrative Code
Title 11 - Mississippi Department of Environmental Quality
Part 5 - Underground Storage Tank Regulations
Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018)
Rule 11-5-2.2 - UST Systems: Design, Construction, Installation and Notification
Section 11-5-2.2-280.21 - Upgrading of existing UST systems

Universal Citation: MS Code of Rules 11-5-2.2-280.21

Current through September 24, 2024

Owners and operators must permanently close (in accordance with Rule 2.7) any UST system that does not meet the new UST system performance standards in § 280.20 or has not been upgraded in accordance with paragraph (b) through (d) of this section. This does not apply to previously deferred UST systems described in Rule 2.10 of this part and where an upgrade is determined to be appropriate by MDEQ.

(a) Alternatives allowed. All existing UST systems must comply with one of the following requirements:

(1) New UST system performance standards under § 280.20;

(2) The upgrading requirements in paragraphs (b) through (d) of this rule; or

(3) Closure requirements under Rule 2.7 of this part, including applicable requirements for corrective action under Rule 2.6.

(b) Tank upgrading requirements. Steel tanks must be upgraded to meet one of the following requirements in accordance with any applicable code of practice listed in § 280.13:

(1) Interior lining. A tank may be upgraded by internal lining if:
(i) The lining is installed in accordance with the requirements of § 280.34, and

(ii) Within 10 years after lining, and every 5 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.

(2) Cathodic protection. A tank may be upgraded by cathodic protection if the cathodic protection system meets the requirements of § 280.20(a)(2) (ii), (iii), and (iv) 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 leaks in accordance with § 280.43(d) through (h); or

(iii)The tank has been installed for less than 10 years and is assessed for corrosion holes by conducting two (2) tightness tests that meet the requirements of § 280.43(c). The first tightness test must be conducted prior to installing the cathodic protection system. The second tightness test must be conducted between three (3) and six (6) months following the first operation of the cathodic protection system; or

(iv) The tank is assessed for corrosion holes by a method that is determined by the MDEQ to prevent leaks in a manner that is no less protective of human health and the environment than paragraphs (b)(2) (i) through (iii) of this section.

(3) Internal lining combined with cathodic protection. A tank may be upgraded by both internal lining and cathodic protection if:
(i) The lining is installed in accordance with the requirements of § 280.34; and

(ii) The cathodic protection system meets the requirements of § 280.20(a)(2)(ii), (iii), and (iv).

(c) Piping upgrading requirements. Metal piping that routinely contains regulated substances and is in contact with the soil and/or water (electrolyte) must be cathodically protected in accordance with one or more of the industry codes recommended practices listed in § 280.13 and must meet the requirements of § 280.20(b)(2)(ii), (iii), and (iv).

(d) Spill and overfill prevention equipment. 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 § 280.20(c) and (d).

Disclaimer: These regulations may not be the most recent version. Mississippi may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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