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Note: EPA no longer updates this information, but it may be useful as a reference or resource.

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

December 11, 1978 PSD Applicability - Temporary Emissions 13.1

Potential as well as allowable emissions estimates for a source should be calculated without taking into account any emissions which result from construction of the source. Therefore, construction related emissions should not be considered in determining whether a source should be required to undergo a second-tier review. Then, if the source is determined to be subject to 2-tier PSD review on the basis of its operating emissions, any emission resulting from construction of the source should be subject to BACT. The construction of a building or other structure which is not a major stationary source or a major modification should not come under PSD review regardless of expected construction emissions.

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