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 11-5-2.3-280.30 - Operation and maintenance of spill and overfill prevention equipment

Universal Citation: MS Code of Rules 11-5-2.3-280.30

Current through September 24, 2024

(a) Owners and operators must ensure that releases due to spilling or overfilling do not occur. The owner and operator must ensure that the volume available in the tank is greater than the volume of product to be transferred to the tank before the transfer is made and that the transfer operation is monitored constantly to prevent overfilling and spilling. Prior to receiving a delivery, owners and operators must ensure that the spill prevention equipment is free of any fluids or debris and the full volume of the spill containment device is available to contain any spills that may occur during the delivery. After completion of the delivery, owners and operators must ensure that the spill prevention equipment is emptied of any regulated substances that may have accumulated during the delivery operation.

(b) The owner and operator must report, investigate, and clean up any spills and overfills in accordance with § 280.53.

(1) Frequency.

(i) Spill prevention equipment installed on or after October 1, 2008, must be tested after installation and before the UST system receives any delivery of regulated substances and at least once every 12 months thereafter.

(ii) Spill prevention equipment installed before October 1, 2008, must be tested by October 1, 2009, and at least once every 12 months thereafter.

(iii)Spill prevention equipment must be tested whenever it is suspected, by visual evidence or other means, that the integrity of the spill prevention equipment may be in question.

(2) Criteria. All spill prevention equipment integrity testing must be conducted in accordance with the manufacturer's specifications and any applicable code of practice listed in § 280.13.

Note: In the absence of manufacturer's specifications or an applicable industry code or recommended practice, the inspection may be accomplished by filling the spill containment with water or other suitable liquid and checking to ensure that no more than one-eighth inch of liquid is lost or gained over a one (1) hour period. Alternative test methods may be utilized only if recognized by the MDEQ as no less protective of human health and the environment than those test methods listed above.

(3) Records. A written record documenting the integrity testing of spill containment equipment must be maintained (in accordance with § 280.35) to demonstrate compliance with this section. These records must provide the results of the last two (2) tests required in this section.

(d) Overfill prevention equipment (including any tight-fill adapters that may be in use) must be inspected and proper operation ensured in accordance with the following requirements:

(1) Frequency.

(i) Overfill prevention equipment installed on or after October 1, 2008, must be inspected for proper operation at installation and before the UST system receives any delivery of regulated substances and at least once every 12 months thereafter.

(ii) Overfill prevention equipment installed before October 1, 2008, must be inspected for proper operation by October 1, 2009, and at least once every 12 months thereafter.

(iii)Overfill prevention equipment must be inspected whenever it is suspected, by visual evidence or other means, that the proper operation of the overfill prevention equipment may be in question.

(2) Criteria. At a minimum, the inspection must ensure that the overfill prevention equipment:

(i) Is properly installed meeting the performance standards listed in § 280.20(d); and

(ii) Is properly functioning in accordance with the manufacturer's specifications and any applicable code of practice listed in § 280.13.

Note: In the absence of manufacturer's specifications or an applicable industry code or recommended practice, the inspection may be accomplished by removal of the equipment from the tank, visual examination and confirmation that the overfill device is installed at the correct height within the tank.

(3) Records. A written record documenting the inspection of the overfill prevention equipment must be maintained (in accordance with § 280.35) to demonstrate compliance with this section. These records must provide the results of the last two (2) inspections required in this section.

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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