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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.

January 11, 1984 Applicability of PSD Increments to Building Rooftops 6.18

Memo discusses whether the PSD system intended that PSD increments be monitored at rooftop level.

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