OAR 340-225-0060
Requirements for Demonstrating Compliance with Standards and Increments in PSD Class I Areas
(1)
Before Jan. 1, 2003, the owner or operator of a source must model impacts and demonstrate compliance with standards and increments on all PSD Class I areas that may be affected by the source or modification.(2)
On or after Jan. 1, 2003, the owner or operator of a source must meet the following requirements:(a)
For each regulated pollutant, a single source impact analysis is sufficient to show compliance with PSD increments if modeled impacts from emission increases equal to or greater than a SER above the netting basis due to the proposed source or modification being evaluated are demonstrated to be less than the Class I significant impact levels specified in OAR 340-200-0020 (General Air Quality Definitions). If this requirement is not satisfied, the owner or operator must complete a competing source analysis to demonstrate that the increased source impacts above baseline concentration plus competing PSD increment consuming source impacts are less than the PSD Class I increments for all averaging times.(b)
For each regulated pollutant, a single source impact analysis is sufficient to show compliance with AAQS if modeled impacts from emission increases equal to or greater than a SER above the netting basis due to the proposed source or modification being evaluated are demonstrated to be less than the Class I significant impact levels specified in OAR 340-200-0020 (General Air Quality Definitions). If this requirement is not satisfied, the owner or operator must complete a competing source analysis to demonstrate compliance with the AAQS by showing that its total modeled impacts plus total modeled competing source impacts plus general background concentrations are less than the AAQS for all averaging times.(c)
The owner or operator also must demonstrate that the proposed source or modification will not cause or contribute to a new violation of an ambient air quality standard or PSD increment even if the single source impact is less than the significant impact levels under subsections (a) and (c), in accordance with OAR 340-202-0050 (Ambient Air Quality Standards: Purpose and Scope of Ambient Air Quality Standards)(2).(3)
Any analyses performed under this section must be done in compliance with OAR 340-225-0030 (Procedural Requirements) and 340-225-0040 (Air Quality Models), as applicable.
Source:
Rule 340-225-0060 — Requirements for Demonstrating Compliance with Standards and Increments in PSD Class I Areas, https://secure.sos.state.or.us/oard/view.action?ruleNumber=340-225-0060.