The Department of Environmental Quality adopted amendments to Part 280, Technical Standards and Corrective Action Requirements for Owners and Operators of USTs. The amendments address industry codes and recommended practices for the operation and maintenance of secondary containment. The changes also include the addition of appendices providing guidelines on the operation of petroleum UST systems and the evaluation of UST cathodic protection systems. http://www.deq.state.ms.us/newweb/MDEQRegulations.nsf/eb2912ed8a3a0dcf86256b980076033d/2b4929acd771bdb286256ba5004842a3/$FILE/UST-2.pdf.