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Please see www.epa.gov/nsr for the latest information on EPA's New Source Review program.

July 13, 1981 PSD Applicability for Ashland Chemical's Maleic Anhydride Plant in Neal, West Virginia 4.18

A switch from benzene to butane feedstock at Ashland Chemical Maleic Anhydride Plant may or may not be subject to PSD review. PSD regulations exempt from review a switch in raw materials in the source was capable of accommodating the material before January 6, 1975. A source is considered to be designed to accommodate an alternate material if the use could be accomplished under its construction specifications in existence prior to that time. The plant in question was originally designed and contracts signed for dual feedstock capability in May 1974. The switch, therefore, is not subject to PSD review.

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