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Disclaimer: The EPA course materials on this site discuss and summarize Clean Air Act programs or EPA regulations, policy, or regulatory interpretations. They do not create new EPA policy or interpretations of regulations. To the extent that they cite a rule provision, or a policy or guidance document, the provision or document referenced speaks for itself, and the citing of it in the materials is not intended by EPA to communicate anything more than what is expressed within the provision or document. Users of the materials should consult the specific provision or document and conduct their own assessment of the applicability of the provision or document to their particular situations. Users are advised to consult with their EPA Regional Office if there is a question as to the relevance of a particular statement in AirKnowledge materials.

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