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Chart activity (Permitting Pyramid) showing major NSR and providing a more in-depth description

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Tile: De Minimis

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Some sources and facilities are considered de minimis and do not require registration or authorization prior to construction.

See earlier page in this module for additional information regarding the review process for these authorizations.

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Tile: PBRs

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Insignificant activities may be permitted by rule. These authorizations are referred to as permits by rule, or PBRs.

See earlier page in this module for additional information regarding the review process for these authorizations.

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Tile: Standard Permits

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The standard permit is the level of the pyramid just before a case-by-case air quality permit. Standard permits may authorize more emissions than a PBR, but are not case-by-case reviews. Standard permits are developed using a reasonable worst-case scenario. Therefore, the division can feel confident that any person that claims a standard permit for their facility will not cause adverse effects to nearby receptors.

See earlier page in this module for additional information regarding the review process for these authorizations.

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Tile: Minor NSR Permits

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These are case-by-case permits for minor sources (i.e., those sources that do not trigger major source permitting).

See earlier page in this module for additional information regarding the review process for these authorizations.

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Tile: Major NSR Permits

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· These are case-by-case permits for major sources (i.e., those sources that trigger major source permitting requirements such as Prevention of Significant Deterioration [PSD], nonattainment, or Maximum Achievable Control Technology [MACT]).

· Permit reviewers ensure that facilities triggering Nonattainment NSR, PSD, or 112(g) MACT meet the additional or different requirements than those required for other NSR permits.

· As part of the technical review for a 112(g) permit, the permit reviewer determines the standards for major sources of hazardous air pollutants for which a MACT standard has not been promulgated.