40 CFR § 63.2490
What requirements must I meet for heat exchange systems?
June 9, 2020
(a) You must comply with each requirement in Table 10 to this subpart that applies to your heat exchange systems, except as specified in paragraphs (b) and (c) of this section.
(b) The phrase “a chemical manufacturing process unit meeting the conditions of §63.100 (b)(1) through (b)(3) of this section” in §63.104(a) means “an MCPU meeting the conditions of §63.2435” for the purposes of this subpart.
(c) The reference to §63.100(c) in §63.104(a) does not apply for the purposes of this subpart.