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 11-5-2.5 - Leak Reporting, Release Reporting, Investigation, and Confirmation
Section 11-5-2.5-280.52 - Release investigation and confirmation steps
Current through September 24, 2024
Unless corrective action is initiated in accordance with Rule 2.6, owners and operators must immediately investigate and confirm all suspected releases of regulated substances requiring reporting under § 280.50 within 7 days, or another reasonable time period specified by the MDEQ, using either the following steps or another procedure approved by the MDEQ:
(a) System test. Owners and operators must conduct tests (according to the requirements for tightness testing in § 280.43(c) and § 280.44(b) or, as appropriate, secondary containment testing described in § 280.31(c)(3) ) that determine whether a leak exists in that portion of the tank that routinely contains product, or the attached delivery piping, or both, or if a breach of either wall of the secondary containment has occurred.
(b) Site check. Owners and operators must measure for the presence of a release where contamination is most likely to be present at the UST site. In selecting sample types, sample locations, and measurement methods, owners and operators must consider the nature of the stored substance, the type of initial alarm or cause for suspicion, the type of backfill, the depth of ground water, and other factors appropriate for identifying the presence and source of the release.
