Ohio regulators have told energy producers operating in the state to disclose certain chemicals used in hydraulic fracturing to county officials and local fire departments. A federal right-to-know policy takes precedence over an Ohio law that allows exclusive reporting to the state's Department of Natural Resources, according to a memo from state authorities. However, some chemicals may be considered trade secrets and not be reported. Firefighters will find it harder to learn the risks from a shale-well fire because they will have to sift through unorganized files, said Tom Stewart, vice president of the Ohio Oil and Gas Association.

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