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)
Appendix 11-5-2-280.4 - GUIDELINES FOR THE PERMANENT CLOSURE OF PETROLEUM UNDERGROUND STORAGE TANK SYSTEMS
Section 11-5-2-280.4-2 - PAPERWORK AND REPORTING REQUIREMENTS
Section 11-5-2-280.4-2-2.4 - Sample Chain-of-Custody

A chain-of-custody record (Appendix E) shall accompany the sample from the time of sample collection to delivery to the lab. The possession or custody of samples must be traceable from the time they are collected until the time the sample is submitted to the laboratory for analysis.

If chain-of-custody procedures are not followed, the integrity of the samples is compromised and the analysis is invalidated. A chain-of-custody record must be completed for all samples that will be analyzed by the laboratory. This record must be completed in the field at the time of sampling. Correct chain-of-custody must continue when the samples are transferred to the laboratory or to the person responsible for the delivery of the samples to the laboratory. Upon transfer of the samples, each person handling the samples must sign, date, and note the time each person received the samples.

Completed chain-of-custody records must be submitted for all samples and included with the UST System Closure Report. A sample chain-of-custody form can be found at Appendix E or may be obtained from the laboratory.