Specialized definitions.

For the purpose of this subpart: (a) Total Toxic Organics (TTO). TTO is a regulated parameter under PSES (§ 464.45) and PSNS (§ 464.46) for the zinc subcategory and is comprised of a discrete list of toxic organic pollutants for each process segment where it is regulated, as follows: (1) Casting Quench (§§ 464.45(a) and 464.46(a)): 21. 2,4,6-trichlorophenol 22. para-chloro meta-cresol 31. 2,4-dichlorophenol 34. 2,4-dimethylphenol 39. fluoranthene 44. methylene chloride (dichloromethane) 65. phenol 66. bis(2-ethylhexyl) phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 85. tetrachloroethylene (2) Die Casting (§§ 465.45(b) and 464.46(b)): 1. acenaphthene 21. 2,4,6-trichlorophenol 22. para-chloro meta-cresol 24. 2-chlorophenol 34. 2,4-dimethylphenol 44. methylene chloride (dichloromethane) 55. naphthalene 65. phenol 66. bis (2-ethylhexyl) phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 85. tetrachloroethylene 86. toluene 87. trichloroethylene (3) Melting Furnace Scrubber (§§ 464.45(c) and 464.46(c)): 31. 2,4-dichlorophenol 34. 2,4-dimethylphenol 39. fluoranthene 44. methylene chloride (dichloromethane) 55. naphthalene 65. phenol 66. bis(2-ethylhexyl) phthalate 68. di-n-butyl phthalate 85. tetrachloroethylene 86. toluene 87. trichloroethylene (4) Mold Cooling (§§ 464.45(d) and 464.46(d)): 21. 2,4,6-trichlorophenol 22. para-chloro meta-cresol 31. 2,4-dichlorophenol 34. 2,4-dimethylphenol 39. fluoranthene 44. methylene chloride (dichloromethane) 65. phenol 66. bis(2-ethylhexyl) phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 85. tetrachloroethylene [50 FR 45247, Oct. 30, 1985; 51 FR 21762, June 16, 1986]