CARB EPA Third-Party Certification

CARB EPA Third-Party Certification
Composite Wood Products Airborne Toxic Control Measure
(916) 322-7433 phone number
A third-party certifier (TPC) is an organization or entity approved by the Executive Officer to do the following:

Verify the accuracy of the emissions and test procedures used by manufacturers of composite wood products
Conduct formaldehyde emission tests
Monitor a manufacturer’s quality assurance program
Provide independent audits and inspections
Among other things, a California Air Resources Board (CARB) approved TPC certifies that a manufacturer’s composite wood products (e.g., hardwood plywood) comply with the identical formaldehyde emission standards found in both CARB’s airborne toxic control measure and the U.S. Environmental Protection Agency’s composite wood products act, Title VI of the Toxic Substances Control Act.

Before a TPC begins certifying hardwood plywood, particleboard, and medium density fiberboard composite wood products that are sold, supplied, offered for sale, or manufactured (including imported) in California, a prospective TPC must first apply to and be approved by CARB. Prospective TPCs may submit an application to CARB at no cost. See application below. Information such as applications, bulletins, and guidance documents is found below.

List of TPCs Executive Orders
TPC Application (for new applicants)
TPC Re-Approval Application (to renew or amend an existing executive order)
TPC Guidance
TPC Bulletin # 1: General Information, Clarifications, and Testing Suggestions


TPC Guideline: Establishing a Correlation Coefficient


TPC Guideline: Limitations of Chromotropic Acid in Small-Scale Test Methods


TPC Guideline: Defining Product Type


TPC Guideline: Certified Mills List


For TPC related questions, contact Julie Cooper at (916) 323-0018 or via email at

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