OAR 340-225-0070
Requirements for Demonstrating Compliance with Air Quality Related Values Protection
(1)
Sources that are not federal major sources are exempt from the requirements of this rule.(2)
When directed by OAR 340 division 224, the requirements of this rule apply to each emissions unit that increases the actual emissions of a regulated pollutant above the portion of the netting basis attributable to that emissions unit.(3)
DEQ must provide notice of permit applications involving AQRV analysis to EPA and Federal Land Managers as follows:(a)
If a proposed source could impact air quality related values, including visibility, deposition, and ozone impacts within a Class I area, DEQ will provide written notice to the EPA and to the appropriate Federal Land Manager within 30 days of receiving such permit application. The notice will include a copy of all information relevant to the permit application, including analysis of anticipated impacts on Class I area air quality related values. DEQ will also provide at least 30 days’ notice to EPA and the appropriate Federal Land Manager of any scheduled public hearings and preliminary and final actions taken on the application;(b)
If DEQ receives advance notice of a permit application for a source that may affect Class I area visibility, DEQ will notify all affected Federal Land Managers within 30 days of receiving the advance notice;(c)
During its review of source impacts on Class I area air quality related values, pursuant to this rule, DEQ will consider any analysis performed by the Federal Land Manager that is received by DEQ within 30 days of the date that DEQ sent the notice required by subsection (a). If DEQ disagrees with the Federal Land Manager’s demonstration, DEQ will include a discussion of the disagreement in the Notice of Public Hearing;(d)
As a part of the notification required in OAR 340-209-0060 (Persons Required to Be Notified), DEQ will provide the Federal Land Manager an opportunity to demonstrate that the emissions from the proposed source would have an adverse impact on air quality related values, of any federal mandatory Class I area. This adverse impact determination may be made even if there is no demonstration that a Class I PSD increment has been exceeded. If DEQ agrees with the demonstration, it will not issue the permit.(4)
Visibility impact analysis requirements:(a)
If division 224 requires a visibility impact analysis, the owner or operator must demonstrate that the potential to emit any regulated pollutant at a SER in conjunction with all other applicable emission increases or decreases, including secondary emissions, permitted since January 1, 1984 and other increases or decreases in emissions, will not cause or contribute to significant impairment of visibility on any Class I area.(b)
The owner or operator must conduct a visibility analysis on the Columbia River Gorge National Scenic Area if it is affected by the source;(c)
The owner or operator must submit all information necessary to perform any analysis or demonstration required by these rules.(d)
Determination of significant impairment: The results of the modeling must be sent to the affected Federal Land Managers and DEQ. The land managers may, within 30 days following receipt of the source’s visibility impact analysis, determine whether or not significant impairment of visibility in a Class I area would result. DEQ will consider the comments of the Federal Land Manager in its consideration of whether significant impairment of visibility in a Class I area will result. If DEQ determines that significant impairment of visibility in a Class I area would result, it will not issue a permit for the proposed source.(5)
In consultation with the Federal Land Managers under FLAG, DEQ may require a plume blight analysis or regional haze analysis, or both.(6)
Criteria for visibility impacts:(a)
The owner or operator of a source, where required by division 224, is encouraged to demonstrate that its impacts on visibility satisfy the guidance criteria as referenced in the FLAG.(b)
If visibility impacts are a concern, DEQ will consider comments from the Federal Land Manager when deciding whether significant impairment will result. Emission offsets may also be considered. If DEQ determines that significant impairment of visibility in a Class I area would result, it will not issue a permit for the proposed source.(7)
Deposition modeling is required for receptors in PSD Class I areas and the Columbia River Gorge National Scenic Area where visibility modeling is required. This may include, but is not limited to an analysis of nitrogen deposition and sulfur deposition.(8)
Visibility monitoring:(a)
If division 224 requires visibility monitoring data, the owner or operator must use existing data to establish existing visibility conditions within Class I areas as summarized in the FLAG Report.(b)
After construction has been completed the owner or operator must conduct such visibility monitoring if DEQ requires visibility monitoring as a permit condition to establish the effect of the regulated pollutant on visibility conditions within the impacted Class I area.(9)
Additional impact analysis: The owner or operator subject to OAR 340-224-0060 (Requirements for Sources in Maintenance Areas)(2) or 340-224-0070 (Prevention of Significant Deterioration Requirements for Sources in Attainment or Unclassified Areas)(3) must provide an analysis of the impact to visibility that would occur as a result of the proposed source and general commercial, residential, industrial, and other growth associated with the source.(10)
If the Federal Land Manager recommends and DEQ agrees, DEQ may require the owner or operator to analyze the potential impacts on other Air Quality Related Values and how to protect them. Procedures from the FLAG report must be used in this recommendation. Emission offsets may also be used. If the Federal Land Manager finds that significant impairment of visibility in a Class I area would result from the proposed activities and DEQ agrees, DEQ will not issue a permit for the proposed source.(11)
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 340-225-0070 — Requirements for Demonstrating Compliance with Air Quality Related Values Protection, https://secure.sos.state.or.us/oard/view.action?ruleNumber=340-225-0070.