Q86. Does Tier 3 have to be used if a unit is less than or equal to 250 mmBtu per hour, but has a continuous gas chromatograph to determine carbon content?
A86. Tier 3 is not required for any unit that is less than or equal to 250 mmBtu/hr, except as otherwise specified by another part of this subpart. However a source may opt to use Tier 3 if it has the capability of determining carbon content and (if applicable) molecular weight at the required frequency specified in §98.34(b)(3). (See §98.33(b)(3).)
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Source: This question and answer was derived from a Legacy FAQ, revised by M. Hannan, 1/23/2013
Approval / Publishing History: Version 2, approved by L. Grogan-McCulloch, 2/13/2013
Expiration: none
Relevant Subparts: Subpart C
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