Composite Wood Products ATCM

This page last reviewed October 5, 2018

Third Party Certification Program

A "Third Party Certifier” is an organization or entity approved by the Executive Officer that verifies the accuracy of the emission test procedures and facilities used by manufacturers to conduct formaldehyde emission tests,
 monitors manufacturer quality assurance programs, and provides independent audits and inspections. 93120. 1(41)

On April 26, 2007, the California Air Resources Board (CARB) approved an airborne toxic control measure (ATCM) to reduce formaldehyde emissions from composite wood products including hardwood plywood (HWPW), particleboard (PB), medium density fiberboard (MDF), and also furniture and other finished products made with composite wood products.

For manufacturers of HWPW, PB, and MDF, compliance with emission standards specified in the ATCM must be verified by using a third party certifier approved by CARB.  Third party certifiers are required to ensure that manufacturers of composite wood products verify compliance with the applicable emissions standards under the ATCM for their manufactured products.

This website contains hyper links to a list of approved third party certifiers, application forms, a flowchart to show the process specified by the ATCM and used by staff in evaluating applications, and other pertinent information for CARB approved third party certifiers. Prospective third party certification candidates may submit an application to CARB at no cost.

For more information, please email us at or contact Julie Cooper at (916) 323-0018, or contact Lynton Baker at (916) 324-6997. 

List of Approved Third Party Certifiers