49 CFR § 195.210 - Pipeline location.
(a) Pipeline right-of-way must be selected to avoid, as far as practicable, areas containing private dwellings, industrial buildings, and places of public assembly.
(b) No pipeline may be located within 50 feet (15 meters) of any private dwelling, or any industrial building or place of public assembly in which persons work, congregate, or assemble, unless it is provided with at least 12 inches (305 millimeters) of cover in addition to that prescribed in § 195.248.
The following state regulations pages link to this page.
- Ariz. Admin. Code R14-5-202 - R14-5-202 - Construction and Safety Standards for Gas, LNG, and Hazardous Liquid Pipeline Systems