The crude oil aboard the train that derailed and exploded two weeks ago in West Virginia contained so much combustible gas that it would have been barred from rail transport under safety regulations set to go into effect next month. Tests performed on the oil before the train left North Dakota showed it contained a high level of volatile gases , according to a lab report reviewed by The Wall Street Journal. The oil’s vapor pressure, a measure of volatility, was 13.9 pounds per square inch, according to the Feb. 10 report by Intertek Group PLC. That exceeds the limit of 13.7 psi that North Dakota is set to impose in April on oil moving by truck or rail from the Bakken Shale. Oil producers that don’t treat their crude […]