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Electronic Code of Federal Regulations

e-CFR data is current as of May 21, 2020

Title 40Chapter ISubchapter CPart 65Subpart D → Appendix


Title 40: Protection of Environment
PART 65—CONSOLIDATED FEDERAL AIR RULE
Subpart D—Process Vents


Table 1 to Subpart D of Part 65—Concentration for Group Determination

Referencing subpart Concentration1
Subpart III of Part 60NA.
Subpart NNN of Part 60300 ppmv of TOC.
Subpart RRR of Part 60300 ppmv of TOC.
Subpart G of Part 6350 ppmv of HAP2.

1The 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.

2For 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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