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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.

October 17, 1989 Ambient Air 6.29

This memo responds to the August 24, 1989, memo from Hathaway to Calcagni [6.27].

(a) PSD modeling by a permit applicant can discount the contribution of a background source to the predicted concentration as described.

(b) Where a proposed source has a significant impact on any increment violation, the permit should not be approved unless the increment violation is corrected prior to operation of the proposed source. (See also July 15, 1988, memo from OAQPS to Region 6 [6.23]).
Notebook Entries: 10.45

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