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EPA Publishes Final Rule on Wood Coating MACT

The U.S. Environmental Protection Agency (EPA) published on March 4 its final rule on the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Surface Coating of Wood Building Products.  This NESHAP, also known as the maximum achievable control technology (MACT) standard for wood coatings, applies to any facility engaged in the surface coating of wood building products.  Notably, the final NESHAP concluded that the standards adequately addressed the risks of air toxics emissions and no additional controls were necessary to protect public health. 

Several notable changes include the following additions: an alternative compliance equation; test methods for determining isocyanates in stationary source emissions (Test Method 326); and compliance tests for coatings containing isocyanate and formaldehyde (M326 and M320 respectively).  EPA removed exemptions for periods of plant startup, shutdown and malfunction from the standard.  The Agency also incorporated electronic reporting into the standard and provided a ready-to-use spreadsheet form for semi-annual reports. 

Existing affected sources must comply with the revised requirements starting no later than 180 days after March 4, 2019. See Final Rule on Wood Coating MACT.  More Info: Gary Heroux

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