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Hollingsworth and Vose

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 with the facility. 
  • The color-coded 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 web page.

Modeling Protocol review highlighted

​​​​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. A facility-specific emissions inventory timeline and associated documents are linked below. 

Jan. 10, 2022: Facility called in to CAO program.

April 11, 2022: Facility submitted emissions inventory and supporting information.

June 8, 2022: DEQ responded to the Emissions Inventory submittal with a request for revisions and additional information. 

June 21, 2022: Facility submitted Emissions Inventory extension request.
July 1, 2022: DEQ responded to the Emissions Inventory request.

July 8, 2022: Facility submitted revised Emissions Inventory and supporting information.

​Sept. 22, 2022: DEQ responded to the Emissions Inventory submittal with a request for revisions and source testing. 

Oct. 24, 2022: Facility submitted revised Emissions Inventory and supporting information. 

Nov. 13, 2022: Facility submitted a source test plan.
Nov. 23, 2022: DEQ approved the source test plan.
Feb. 4, 2023: Facility submitted the source test report. 
Mar. 1, 2023: DEQ responded to the Emissions Inventory submittal and source test report with requests for updates to the Emissions Inventory and repetition of some testing. 
Mar. 30, 2023: Facility submitted revised Emissions Inventory and supporting information. 
Apr. 3, 2023: Facility submitted the source test report for the raw materials handling area Permanent Total Enclosure verification.
Apr. 7, 2023: DEQ issued a Source Test Report Review Memorandum for the raw materials handling area testing. 
Apr. 17, 2023: DEQ requested additional emissions estimates for the Ceramic Filtration Unit (CFU) Discharge Filters. 
Apr. 27, 2023: Facility provided additional emissions estimates for the CFU Discharge Filters. 

May 4, 2023: DEQ responded to the Emissions Inventory submittal with a request for revisions. 
May 8, 2023: Facility requested an extension of the due date for the Emissions Inventory submittal. 
May 9, 2023: DEQ responded to H&V's request for an extension of the due date for the Emissions Inventory submittal. 
May 26, 2023: Facility submitted a revised Emissions Inventory and supporting information. 
June 13, 2023: DEQ approved the Emissions Inventory.
​​Oct. 27, 2023: Facility submitted a revised Emissions Inventory
  • ​Revised Emissions Inventory
  • ​Revised Emissio​ns Inventory Calculations​
March 14, 2024: 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.

July 13, 2023: Facility submitted a Modeling Protocol 

  • Modeling Protocol 
  • Crosswalk of Receptors​​​
Aug. 10, 2023: Facility submitted a Risk Assessment Work Plan
  • Risk Assessment Work Plan ​
​Sep. 29, 2023: DEQ responded to the Modeling Protocol and Risk Assessment Work Plan submittals with a request for revisions and additional information. 
Oct. 27, 2023: Facility submitted a revised Modeling Protocol and Risk Assessment Work Plan.
  • Cover Letter
  • ​Modeling Protocol
  • ​Crosswalk of Receptors
  • ​Risk Ass​essment Work Plan​
Dec. 14, 2023: DEQ requested additional information about the Modeling Protocol.
Jan. 4, 2024: Facility submitted response to DEQ’s request for additional information.

Feb. 23, 2024: DEQ responded to H&V's January 4 proposal and requested revised versions of the Emissions Inventory, Modeling Protocol, and Risk Assessment Work Plan.

March 14, 2024: Facility submitted a revised Modeling Protocol and Risk Assessment Work Plan. 

About the Facility

Hollingsworth & Vose manufactures specialty glass fiber products from sand and other materials using electric furnaces and other equipment that result in glass melting and shaping of the glass into long, very thin fibers. Glass fiber produced at this facility is a raw material used in air and liquid filtration media and specialty battery separator media. H&V acquired the site in 1996 from Evanite Fiber Corporation. Learn more about air quality permitting for Hollingsworth and Vose.

DEQ contact

1551 Crystal Lake Drive, Corvallis, OR 97333 

Current Air Permit 

Standard ACDP, 02-2173-ST-01

How to get involved

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