Imerys Perlite USA

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. 

CAO Risk Assessment Process

• CAO Risk Assessment Process

About The Facility:

Imerys Perlite USA, or Imerys, operates a perlite drying facility in Lakeview, Oregon. Imerys stores raw material (perlite) in piles, uses crushers and screens to obtain perlite of the desired size, and dries the crushed product in a rotary kiln dryer. Imerys stores the processed material in silos prior to shipment of finished product off-site in rail cars and/or trucks. The facility has operated in various configurations since 1996.