The Emissions Inventory provides information on all the Toxic Air Contaminant emissions from a facility, and includes information on a facility's operations and activities, as well as fuel and material usage rates. This is often the longest step in the CAO risk assessment process as DEQ needs to verify that all activities have been accounted for, and that the most representative emissions data available are used. In some cases, DEQ will require a facility to perform source testing at this stage if insufficient data is available to estimate emissions. For an introduction to emissions inventories and why they matter, please see EPA's Fact Sheet.
Oct. 30, 2024: Facility Called In to Cleaner Air Oregon
Jan. 10, 2025: ORRCo requests an Emissions Inventory extension
Jan. 13, 2025: DEQ approves extension request
March 17, 2025: ORRCo submits Emissions Inventory and Supporting Information
July 16, 2025: DEQ responds to the Emissions Inventory submittal with a request for revisions and additional information.
Aug. 25, 2025: ORRCo requests an extension
Oct. 23, 2025: DEQ responds to partial Emissions Inventory submittal