Skip to main content


Air Toxics Health Risk Assessment Status

DEQ called in ENTEK International LLC to the Cleaner Air Oregon program on March 4, 2019. ENTEK is currently working on its Emissions Inventory which is the first step of the Cleaner Air Oregon health risk assessment process. DEQ created Cleaner Air Oregon facility web pages as part of an ongoing commitment to communities to be transparent and provide access to a facility’s health risk assessment information. Facility correspondence and deliverables are provided below.

Air Toxics assessment process

process diagram

​For an introduction to emissions inventories and why they matter, please see EPA’s Fact Sheet. DEQ is currently finalizing a fact sheet specific to our Cleaner Air Oregon program. A facility-specific emissions inventory timeline and associated documents are linked below.

March 4, 2019: DEQ calls ENTEK into the program

June 3, 2019: ENTEK submits Emissions Inventory and Categorically Insignificant Activities Form for DEQ review
  • Cover letter for Emissions Inventory submittal
  • Emissions inventory: An Emissions Inventory is a list of each toxic air contaminant regulated under the Cleaner Air Oregon rules that a facility emits in a given year. The Emissions Inventory includes the amount of each toxic air contaminant emitted from each individual emissions-producing activity.
  • Categorically Insignificant Activities (Form ED601): Categorically Insignificant Activities are activities that are likely to have insignificant emissions that are not part of a facility’s primary production process. Categorically Insignificant Activities are defined in OAR 340-200-0020.

Aug. 8, 2019: DEQ requests supporting Emissions Inventory information

  • DEQ’s response letter: DEQ requests supporting information to verify emissions reported in original Emissions Inventory submittal
Sept. 6, 2019: ENTEK provides a revised Emissions Inventory and supplemental information in response to DEQ’s request
Oct. 8, 2019: Based on DEQ’s review of the revised Emissions Inventory, DEQ sends ENTEK a Warning Letter with Opportunity to Correct.
Oct. 16, 2019: DEQ and ENTEK meet to discuss Emissions Inventory

Oct. 24, 2019: ENTEK sends DEQ a response letter including an extension request for gathering specific data relative to the Warning Letter with Opportunity to Correct.

Nov. 6, 2019: ENTEK provided the majority of data requested in the Warning Letter with Opportunity to Correct. DEQ sent ENTEK an extension approval letter for the remaining data not submitted.

Nov. 20, 2019: DEQ visited ENTEK to better understand the facility’s processes and emissions. DEQ is currently reviewing the submitted information while waiting on the remaining information requested in the Warning Letter with Opportunity to Correct.

Feb. 7, 2020: ENTEK letter submitted along with requested TCE service components and fugitive emissions data.

July 10, 2020: DEQ sends ENTEK amended Warning Letter outlining final corrective actions and timelines required for completed Emissions Inventory.

Aug. 7, 2020: ENTEK response to DEQ's amended Warning Letter.

Jan. 11, 2021: DEQ issues ENTEK a Pre-Enforcement Notice for violations related to corrective actions required in the Warning Letter.

Feb. 3, 2021: DEQ issues ENTEK a Notice of Civil Penalty and Order for violations related to corrective actions required in the Warning Letter.

About the Facility

ENTEK is a battery separator manufacturing facility that has operated in Lebanon since 1984. The facility manufactures lead acid separator material using a mix of oil and product specific additives such as polyethylene and silica. Lithium ion separator materials are manufactured using the same method without the use of silica. The mixture is extruded at an elevated temperature into desired shapes, and the oil is extracted from the microporous plastic product using a trichloroethylene bath.


Jonathan Giska

Entek Site Address

250 Hansard Avenue,
Lebanon, OR 97355

Current Air Permit


How to get involved