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 11-5-2.4 - Leak Detection
Section 11-5-2.4-280.40 - General requirements for all UST systems
Universal Citation: MS Code of Rules 11-5-2.4-280.40
Current through September 24, 2024
(a) Owners and operators of new and existing UST systems must provide a method, or combination of methods, of leak detection that:
(1) Can
detect a leak from any portion of the tank and the connected underground piping
and ancillary equipment that routinely contains product;
(2) Is installed, calibrated, operated, and
maintained in accordance with the manufacturer's instructions and any
applicable code of practice listed in § 280.13, including routine
maintenance and service checks for operability or running condition;
(3) Beginning on [three years after effective
date of rule], is operated and maintained, and electronic and mechanical
components are tested for proper operation. The leak detection equipment shall
be tested for proper operation in accordance with one of the following:
manufacturer's instructions; a code of practice developed by a nationally
recognized association or independent testing laboratory; or requirements
determined by MDEQ to be no less protective of human health and the environment
than the two options listed above. A test of the proper operation must be
performed at least every 12 months and, at a minimum, as applicable to the
facility, cover the following components and criteria:
(i) Automatic tank gauge and other
controllers: test alarm; verify system configuration; test battery
backup;
(ii) Probes and sensors:
inspect for proper placement; remove any residual buildup; ensure floats move
freely; ensure shaft is not damaged; ensure cables are free of kinks and
breaks; test alarm operability and communication with controller;
(iii) Automatic line leak detector: test
operation to meet criteria in § 280.44(a) by simulating a leak;
(iv) Vacuum pumps and pressure gauges: ensure
proper communication with sensors and controller; and
(v) Hand-held electronic sampling equipment
associated with groundwater and vapor monitoring: ensure proper operation:
and
(4) Meets the
performance requirements in § 280.43, § 280.44, § 280.45, or
Rule 2.10 with any performance claims and their manner of determination
described in writing by the equipment manufacturer or installer. In addition,
methods used must be capable of detecting the leak rate or quantity specified
for that method in the corresponding section of the rule with a probability of
detection of 0.95 and a probability of false alarm of 0.05.
(b) When a leak detection method operated in accordance with the performance standards in § 280.43, § 280.44, § 280.45, or Rule 2.10 indicates a leak may have occurred, owners and operators must notify the MDEQ in accordance with Rule 2.5.
(c) Any UST system that can not apply a method of leak detection that complies with the requirements of this rule must complete the closure procedures in rule 2.7.
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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