I can't find any mention in the current version yet but an older version (2014) of the FHA Single Family Housing Policy Handbook IV. Appraiser and Property Requirements for Title II Forward and Reverse Mortgages B. Property Acceptability Criteria lists the following;
iv. Proximity to High Pressure Gas Lines A dwelling or related property improvement near high-pressure gas, liquid petroleum pipelines or other volatile and explosive products, both aboveground and subsurface, must be located more than 10 feet from the nearest boundary of the pipeline easement. (I would have about 30 foot between house and the edge of the easement.)
vii. Stationary Storage Tanks If the subject property line is located within 300 feet of an above ground or subsurface stationary storage tank with a capacity of 1,000 gallons or more of flammable or explosive material, the site is ineligible for FHA insurance. This includes domestic and commercial uses as well as automotive service station tanks. (N/A in my case but is good to know.)
It appears that Federal, State and Local governents have eminent domain authority.