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 11-5-2.3 - General Operating Requirements
Section 11-5-2.3-280.34 - Repairs and replacements allowed
Current through September 24, 2024
Owners and operators of UST systems must ensure that repairs will prevent leaks due to structural failure or corrosion as long as the UST system is used to store regulated substances. The repairs must be made within 90 days of an observed failure, or another timeframe as approved by MDEQ and meet the following requirements:
(a) Repairs to UST systems must be properly conducted in accordance with the manufacturer's specifications and any applicable code of practice listed in § 280.13.
(b) Repairs to fiberglass-reinforced plastic tanks must be conducted in accordance with the manufacturer's specifications and any applicable code of practice listed in § 280.13.
(c) Metal pipe sections and fittings that have leaked product as a result of corrosion or other damage must be replaced. Replaced as it applies to metal pipe sections means that only the section of pipe from joint-to-joint must be replaced when repairing such a pipe system. It is not intended to imply that the entire piping system must be replaced with a secondarily contained pipe system unless more than 50 percent of the individual piping run has to be repaired. Repairs to fiberglass-reinforced plastic piping must be conducted in accordance with the manufacturer's specifications and any applicable code of practice listed in § 280.13.
(d) Repaired tanks and piping must be tightness tested in accordance with § 280.43(c) and § 280.44(b) after such repairs are complete and before the UST system is brought back into service.
(e) 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 in accordance with the manufacturer's specifications and any applicable code of practice listed in § 280.13 after such repairs are complete and before the UST system in brought back into service.
(f) Repaired spill containment equipment and secondary containment that cannot be tightness tested must be tested in accordance with § 280.30(c) and § 280.31(d) after such repairs are complete and before the UST system is brought back into service.
(g) Repaired dispensers, submersible pumps and other ancillary equipment that cannot be tightness tested must be visually inspected for any leaks to ensure integrity after such repairs are complete and before the UST system is brought back into service.
(h) If an existing underground storage tank, pipe, dispenser, or submersible pump is replaced, the requirements in § 280.20 apply only to the specific underground storage tank, pipe, dispenser, or submersible pump being replaced, not to other underground storage tanks, piping, dispensers or submersible pumps located at the underground storage tank facility.
(i) The MDEQ may waive the requirement that secondary containment be installed when a dispensers or submersible pump is replaced because of an accident or for other circumstances the MDEQ deems appropriate.
(j) Within 6 months following the repair of any cathodically protected UST system, the cathodic protection system must be tested in accordance with § 280.32(b) and (c) to ensure that it is operating properly.
(k) UST system owners and operators must maintain records of each repair and replacement for the remaining operating life of the UST system that demonstrate compliance with the requirements of this rule.
