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What constitutes a “modification?”
Under the CAA, modifying a stationary source can trigger stationary source standards in Parts 60, 61, and 63 and/or new source review (NSR). So, what is a “modification?” The definition consists of two parts. First, the change must be a physical or operational change. Second, the change must result in an increase in the emission rate of an air pollutant. Some activities are exempted from this definition, but if the source cannot take advantage of one of the exemptions, a preconstruction evaluation on applicability of the source category standards and NSR must be performed.
Because of this, when doing projects that affect air emissions, plan ahead! Visit our website for more compliance morsels.
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McCoy and Associates, Inc. makes no representation, warranty, or guarantee in connection with any guidance provided above. McCoy and Associates, Inc. expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal, state, or municipal law or regulation with which such guidance may conflict. Any guidance above is general in nature related to the federal environmental regulations. Persons evaluating specific circumstances dealing with environmental regulations should review state and local laws and regulations, which may be more stringent than federal requirements. In addition, the assistance of a qualified professional should be enlisted to address any site-specific circumstances.
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