Requirements for marking location of subsurface installation. An operator who marks the approximate location of a subsurface installation shall make a reasonable effort to make the markings in a manner that is consistent with the practice in the industry. The operator shall use the following colors for the markings:
1. Safety red must be used for electrical power, distribution and transmission installations, conduit for traffic signals and street lights and municipal electric installations.
2. High visibility safety yellow must be used for gas distribution and transmission installations, oil distribution and transmission installations and installations containing or transporting dangerous materials, products or steam.
3. Safety alert orange must be used for telephone and telegraph installations, police and fire communication installations and cable television installations. The letter “F” in safety alert orange must be used for fiber optic communication lines.
4. Safety precaution blue must be used for water installations and slurry pipelines.
5. Safety green must be used for sewer installations.
Last modified: February 26, 2006