In an attempt to reduce the risk of fiery oil train accidents, the state of Washington is working to pass a bill that would limit the vapor pressure of oil on trains to below 9 pounds per square inch (psi). Vapor pressure is a measure of the volatility of flammable liquids and correlates to their likelihood of igniting. Higher vapor pressure means an oil is more volatile and more likely to ignite and burn when a train derails.
“If the federal government won’t act to protect public safety and adopt a safer nationwide standard, we will adopt our own,” state Sen. Andy Billig (D-Spokane) said of the bill he sponsored. “There is just too much to lose — for people and our environment.”
Billig's comments point to the federal government's repeated failure to address the volatility of the oil moving by rail in America.