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The 280-acre complex, built during World War II, manufactured synthetic rubber and dumped chemical waste -- including benzene, propane, butylene and butane -- into unlined pits and evaporation ponds, causing extensive contamination of the soil and groundwater.

That works fine, but using natural gas and related chemicals turns out a different mix of materials than using petroleum does; one of the chemicals that does not get produced in abundance is butylene.

It has been found that butylene oxide is significantly less toxic than 15 either of the two commonly used oxides.

Notably, it is easily converted into a commodity chemical called butylene, which has four carbon atoms and is in relatively short supply right now.