Skip to main content

Oregon State Flag An official website of the State of Oregon »

Oregon.gov Homepage

Hampton Lumber Mills, Inc., dba Tillamook Lumber Company

Cleaner Air Oregon is a health-based permitting program that regulates emissions of toxic air contaminants from facilities based on risk to nearby communities. CAO requires facilities to report toxic air contaminant emissions, assess potential health risks to people nearby and reduce toxic air contaminant risk if it exceeds legal limits.

As part of the Cleaner Air Oregon process, each facility has a dedicated web page to provide communities access to facility information and updates on where it is involved in the process.

  • Each step of the CAO risk assessment process has a section that includes DEQ's communications and deliverables from the facility.
  • The graphic below shows where a facility is in the Cleaner Air Oregon Process.

For additional information and history of the program, visit the Cleaner Air Oregon website. 

green arrow pointing to risk assessment

CAO Risk Assessment Process


​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​. 

Jan. 2, 2025: Facility called in to CAO program. 

March 13, 2025: Facility submitted Emissions Inventory extension request.
March 18, 2025: DEQ responded to Emissions Inventory extension request.
May 2, 2025: Facility submitted the Emissions Inventory
Nov. 14, 2025: DEQ responded to the Emissions Inventory submittal with request for updates and additional information.
Dec. 26, 2025: Facility submitted Emissions Inventory extension request.
Jan. 5, 2026: DEQ responded to Emissions Inventory extension request.
Jan. 30, 2026: Facility submitted a revised Emissions Inventory.

  • Emissions Inventory Cover Letter

  • Emissions Inventory (AQ520) – Base Scenario

  • Emissions Inventory (AQ520) – Startup Scenario

  • Emissions Inve​ntory Calculations​

July 14, 2026: DEQ responded to the Emissions Inventory submittal with request for updates and additional information.
Aug. 21, 2026: Facility submitted a revised Emissions Inventory.

Sep​t. 14, 2026: DEQ conditionally approved the Emissions Inventory.

Oct. 14, 2026: Facility submitted a revised Emissions Inventory.


​​

The Modeling Protocol provides information on how the facility plans to accurately model the concentrations of Toxic Air Contaminants (TACs) that community members may be exposed to based on the TAC emissions data from the approved Emissions Inventory. A Risk Assessment Work Plan is required for more complex Risk Assessments (Level 3 or Level 4) and provides more detailed information about locations where people live or normally congregate around the facility and how risk to these community members will be evaluated.

Oct. 14, 202​6: Facility submitted a Modeling Protocol and Risk Assessment Work Plan.

​

About the Facility

Hampton Lumber Mills, Inc., dba Tillamook Lumber Company operates a saw mill at 3111 East 3rd Street in Tillamook, Oregon. Logs are brought into the log yard by truck and are mostly hemlock. The logs are debarked and sawed to specifications for the lumber product. Most of the lumber is dried in the drying kilns prior to shipment. The kilns are heated by steam supplied by a hog fueled boiler. Wood residue generated from wood working operations includes sawdust, wood chips, wood shavings and bark. Part of the wood residue (i.e., bark, some shavings, and some sawdust) is used as fuel for the hogged fuel boiler. The remainder (e.g., wood shavings and chips) is transported for market. Some lumber may be anti-stained coated or painted with the company logo and have end-seal applied prior to shipment.



DEQ Contact

Julia DeGagné, Project Manager

Site Address

3111 East 3rd Street
Tillamook, OR 97141 

Current Air Permit

Title V, 29-0007-TV-01

How to get involved

Sign up to receive text or email updates about Cleaner Air Oregon.

If you have questions, please email us.