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 June 25, 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.