Operating and abandoned oil and gas wells pose potential hazards to housing, including potential fire, explosion, spray and other pollution. Therefore, no dwelling may be located closer than 300 feet from an active or planned drilling site or 75 feet from an operating well; this applies to the site boundary, not to the actual well location.

1. Underground Tanks: If there is any observable surface evidence of leakage from an underground storage tank, further analysis/testing is required.

2. Hydrogen Sulfide Gas:  Commonly referred to as Sour Gas Wells are extremely hazardous. Please see: HUD Handbook 4150.2, Section 2-2.D. "Special Case..." for instructions.

For more information please see: HUD Handbook 4150.2, Section 2-2.D.

	Airports
	Railroad tracks and other high noise sources
	Flood zones and insurance
	Lead based paint
	Radon
	Overhead high voltage transmission towers and lines
	Operating and abandoned oil and gas wells, tanks and pressure lines
	Insulation materials
	Lava zones
	Avalanche hazards