1994 PipelineSafety Task Force - Laserfiche WebLink

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CHAPTER 5 TECHNICAL TOPICS In order to fully comprehend and judge the quality of the pipelines and pipeline terminals in Roseville, a number of technical reports and informatior� were sought and submitted to the Task Force. The following is a summary of that information. (Note: regutations cited apply to new construction_ Prior consiruction complying with regulations in effeci at the time, was "grandfathered" in.) U.S. Department of Transportation (DOT) Pipeline Safety Regulaiions The Minnesota �ffce of Pipeline Safety (MnOPS) inspects intrastate and interstate pipeline in accordance with U.S. DOT Pipeline Safety Regulations 191, 192 and 19�. These regulations cover both natural gas and hazardous liquids transported through pipeiines. Hazardous liquids are defined as: petroleum, petraleum products or an�ydrous ammonia. The materials, design, constr�ction and installation specificatio�s are s�t forth, incl�ding the depth at which the pipelines are to be buried. The regulations mandate that pipeiines will have a cathodic protection system. A complete record showing all materials, sizes, and locations of all component of the pipeEine system must be retained for the life of the system_ The frequency of testing and inspections is set forth. The types of tests and observation methods are listed. Records of all required tests wiil be made and retained for the fife of the pipeline. Annual reports will be filed for all transmission, gathering and distribution systems. A program to observe surface conditions on and adjacent to the transmission line righ#-of-way for leaks, construction activity and other factors affecting safety and operation must be in place and operational. For natural gas pipelines, the location of customer meters, service regulators, valves, and service lines as well as the connections for main piping is specified, depending on the type and location of installation. For hazardous materiafs, valves must be installed on the suction end and the discharge end of a pump station; on each line entering or leading a breakout storage tank area; on each mainline at locations along the pipefine system that will minimize damage or pollution; on each laterai takeoff from a trunk line; on each side of a water crossing that is more than 100 ft. wide from high-water mark to high-wafer mark; and on each side of a reservoir holding water for human consumption. Line markers, Flgure 5, for transmission [ines of natural gas must be placed at each crossing of a public road and raiiroad and wherever necessary to identify the Eine to reduce the possibility of damage. In high density population areas tt�is may be 5-1