Stationary Combustion Turbines Stay Lifted on Formaldehyde Compliance

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The U.S. EPA signed an amendment to the rule on February 28, 2022 that removes the stay of the formaldehyde limit for lean premix and diffusion flame gas-fired units that were constructed or reconstructed after January 14, 2003. In light of the issues concerning the legality of the 2004 stay and the uncertainty concerning the timing and outcome of the EPA’s final decision on the delisting petition, the EPA is taking final action now to remove the stay of the standards for new lean premix and diffusion flame gas-fired turbines.The rule was published in the federal register on March 9, 2022.

Major HAP sources with lean premix and diffusion flame gas-fired units that were constructed or reconstructed after January 14, 2003 must demonstrate compliance with the 91 parts per billion (ppb) formaldehyde emissions limit in Table 1 of the NESHAP within 180 days of the publication of the amended rule.

This may put facilities in a time crunch if stack testing results are over the limit. Facilities over the limit will need controls such as oxidation catalysts added to their process. It is imperative to schedule stack testing immediately to determine compliance with the 91 ppb emission limit if your facility is affected. Contact ESS for a quote and scheduling.

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