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| VOC DEFINITION TABLE 1 Definition of VOC 40 CFR Part 51.100(s) Updated in 2000 (s) Volatile organic compounds (VOC) means any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate, which participates in atmospheric photochemical reactions. (1) This includes any such organic compound other than the following, which have been determined to have negligible photochemical reactivity: methane ethane methylene chloride (dichloromethane) 1,1,1-trichloroethane (methyl chloroform) 1,1,2- trichloro-1,2,2-trifluoroethane (CFC– 113) trichlorofluoromethane (CFC–11) dichlorodifluoromethane (CFC–12) chlorodifluoromethane (HCFC–22) trifluoromethane (HFC–23) 1,2-dichloro 1,1,2,2-tetrafluoroethane (CFC–114) chloropentafluoroethane (CFC–115) 1,1,1-trifluoro 2,2-dichloroethane (HCFC–123) 1,1,1,2-tetrafluoroethane (HFC–134a) 1,1-dichloro 1-fluoroethane (HCFC–141b) 1-chloro 1,1- difluoroethane (HCFC–142b) 2-chloro- 1,1,1,2-tetrafluoroethane (HCFC–124) pentafluoroethane (HFC–125) 1,1,2,2- tetrafluoroethane (HFC–134) 1,1,1- trifluoroethane (HFC–143a) 1,1- difluoroethane (HFC–152a) parachlorobenzotrifluoride (PCBTF) cyclic, branched, or linear completely methylated siloxanes acetone perchloroethylene (tetrachloroethylene) 3,3-dichloro- 1,1,1,2,2-pentafluoropropane (HCFC– 225ca) 1,3-dichloro-1,1,2,2,3- pentafluoropropane (HCFC–225cb) 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC 43–10mee) difluoromethane (HFC–32) ethylfluoride (HFC–161) 1,1,1,3,3,3-hexafluoropropane (HFC– 236fa) 1,1,2,2,3-pentafluoropropane (HFC–245ca) 1,1,2,3,3- pentafluoropropane (HFC–245ea) 1,1,1,2,3-pentafluoropropane (HFC– 245eb) 1,1,1,3,3-pentafluoropropane (HFC–245fa) 1,1,1,2,3,3- hexafluoropropane (HFC–236ea) 1,1,1,3,3-pentafluorobutane (HFC– 365mfc) chlorofluoromethane (HCFC– 31) 1 chloro-1-fluoroethane (HCFC– 151a) 1,2-dichloro-1,1,2-trifluoroethane (HCFC–123a) 1,1,1,2,2,3,3,4,4-nonafluoro- 4-methoxy-butane (C4F9OCH3) 2- (difluoromethoxymethyl)-1,1,1,2,3,3,3- heptafluoropropane ((CF3)2CFCF2OCH3) 1-ethoxy- 1,1,2,2,3,3,4,4,4-nonafluorobutane (C4F9OC2H5) 2-(ethoxydifluoromethyl)- 1,1,1,2,3,3,3-heptafluoropropane ((CF3)2CFCF2OC2H5) methyl acetate and perfluorocarbon compounds which fall into these classes: (i) Cyclic, branched, or linear, completely fluorinated alkanes (ii) Cyclic, branched, or linear, completely fluorinated ethers with no unsaturations (iii) Cyclic, branched, or linear, completely fluorinated tertiary amines with no unsaturations and (iv) Sulfur containing perfluorocarbons with no unsaturations and with sulfur bonds only to carbon and fluorine. (2) For purposes of determining compliance with emissions limits, VOC will be measured by the test methods in the approved State implementation plan (SIP) or 40 CFR part 60, appendix A, as applicable. Where such a method also measures compounds with negligible photochemical reactivity, these negligibility-reactive compounds may be excluded as VOC if the amount of such compounds is accurately quantified, and such exclusion is approved by the enforcement authority. (3) As a precondition to excluding these compounds as VOC or at any time thereafter, the enforcement authority may require an owner or operator to provide monitoring or testing methods and results demonstrating, to the satisfaction of the enforcement authority, the amount of negligibly-reactive compounds in the source’s emissions. (4) For purposes of Federal enforcement for a specific source, the EPA shall use the test methods specified in the applicable EPA-approved SIP, in a permit issued pursuant to a program approved or promulgated under title V of the Act, or under 40 CFR part 51, subpart I or appendix S, or under 40 CFR parts 52 or 60. The EPA shall not be bound by any State determination as to appropriate methods for testing or monitoring negligibly-reactive compounds if such determination is not reflected in any of the above provisions.
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