oil-train-railThree independent companies that transport North Dakota crude oil by train have not been properly labeling the oil as it goes en route from cargo tanks to the actual train, investigators for the U.S. Pipeline and Hazardous Materials Safety Administration (PHMSA) said Tuesday.

PHMSA has proposed a total of $93,000 in combined fines for Hess Corporation, Whiting Oil and Gas Corporation, and Marathon Oil Company for not using proper “hazard classes” to label crude oil. PHMSA said the offense “could result in material being shipped in containers that are not designed to safely store it.”

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