['Air Programs']

['Hazardous Air Pollutants']

01/24/2025

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Air Programs - Hazardous Air Pollutants

Table 4 to Subpart UUUUU of Part 63 - Operating Limits for EGUs

RegSense CFR Regulations Environmental Protection Agency (EPA)Hazardous Air Pollutants CAA Compliance Environmental Focus Area USA English Air Programs CFR Appendix

Before July 6, 2027, as stated in �63.9991, you must comply with the applicable operating limits in table 4. However, on or after July 6, 2027 you may not use PM CPMS for compliance demonstrations, unless it is for an IGCC unit.

If you demonstrate compliance using . . .	You must meet these operating limits . . .
PM CPMS	Maintain the 30-boiler operating day rolling average PM CPMS output determined in accordance with the requirements of �63.10023(b)(2) and obtained during the most recent performance test run demonstrating compliance with the filterable PM, total non-mercury HAP metals (total HAP metals, for liquid oil-fired units), or individual non-mercury HAP metals (individual HAP metals including Hg, for liquid oil-fired units) emissions limitation(s).

If you demonstrate compliance using . . .

You must meet these operating limits . . .

PM CPMS

Maintain the 30-boiler operating day rolling average PM CPMS output determined in accordance with the requirements of �63.10023(b)(2) and obtained during the most recent performance test run demonstrating compliance with the filterable PM, total non-mercury HAP metals (total HAP metals, for liquid oil-fired units), or individual non-mercury HAP metals (individual HAP metals including Hg, for liquid oil-fired units) emissions limitation(s).

[81 FR 20197, Apr. 6, 2016; 89 FR 38582, May 7, 2024]

['Air Programs']

['Hazardous Air Pollutants']

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