40 CFR Appendix Table 1 to Subpart D of Part 65, Concentration for Group Determination

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Table 1 to Subpart D of Part 65 - Concentration for Group Determination
Referencing subpart Concentration 1
Subpart III of Part 60 NA.
Subpart NNN of Part 60 300 ppmv of TOC.
Subpart RRR of Part 60 300 ppmv of TOC.
Subpart G of Part 63 50 ppmv of HAP 2.

1 The 50 ppm HAP concentration cutoff only applies to 40 CFR part 63, subpart G sources. Process vents subject to only 40 CFR part 60, subparts RRR or NNN are eligible for the 300 ppm TOC cutoff. There is no concentration cutoff for subpart III sources. The process vent provisions of subpart DDD are not consolidated under this subpart.

2 For process vents subject to subpart G of 40 CFR part 63, the owner or operator may measure HAP or TOC concentration with regard to the low concentration exemption provisions of this part.

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