Natural gas is transported via buried gas lines located in and around the Metroplex. Most of these lines have been in existence for 30 years. These lines are inspected, are pressure tested on an annual basis, and are buried below the ground level a federally mandated minimum of 3 feet. These lines are all clearly marked with pipe markers that are normally bright yellow markings with the company name and emergency phone numbers.
For more information regarding federal pipeline regulations, visit the U.S. Government Printing Office website to view Title 49, Subtitle B, Chapter I, Subchapter D-Pipeline Safety.