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New Source Review

New Source Review (NSR) identifies the conditions a regulated source must meet in order to lawfully construct. NSR is generally required for new facilities being proposed on previously undeveloped land or at previously unpermitted locations (referred to as New Source Construction), as well as for substantial physical changes or changes in the method of operation that are being proposed at existing facilities.

There are three types of New Source Review (NSR) permitting requirements. A source may have to meet one or more of the following permitting requirements:

Additional background information is available concerning NSR rules. IDEM’s NSR Reform Manual includes basic  terminology and overviews of Actual-To-Project Actual (APTA) Applicability and Plantwide Applicability Limitation (PAL) for applicants.

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