For the purpose of this subpart:
(a) Total Toxic Organics (TTO). TTO is a regulated parameter under PSES (Sec. 464.45) and PSNS (Sec. 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 (Sec. 464.45(a) and Sec. 464.46(a)): 21. 2,4,6-trichlorophenol22. para-chloro meta-cresol31. 2,4-dichlorophenol34. 2,4-dimethylphenol39. fluoranthene44. methylene chloride (dichloromethane)65. phenol66. bis(2-ethylhexyl) phthalate68. di-n-butyl phthalate70. diethyl phthalate85. tetrachloroethylene
(2) Die Casting (Sec. 465.45(b) and Sec. 464.46(b)): 1. acenaphthene21. 2,4,6-trichlorophenol22. para-chloro meta-cresol24. 2-chlorophenol34. 2,4-dimethylphenol44. methylene chloride (dichloromethane)55. naphthalene65. phenol66. bis (2-ethylhexyl) phthalate68. di-n-butyl phthalate70. diethyl phthalate85. tetrachloroethylene86. toluene87. trichloroethylene
(3) Melting Furnace Scrubber (Sec. 464.45(c) and Sec. 464.46(c)): 31. 2,4-dichlorophenol34. 2,4-dimethylphenol39. fluoranthene44. methylene chloride (dichloromethane)55. naphthalene65. phenol66. bis(2-ethylhexyl) phthalate68. di-n-butyl phthalate85. tetrachloroethylene86. toluene87. trichloroethylene
(4) Mold Cooling (Sec. 464.45(d) and Sec. 464.46(d)): 21. 2,4,6-trichlorophenol22. para-chloro meta-cresol31. 2,4-dichlorophenol34. 2,4-dimethylphenol39. fluoranthene44. methylene chloride (dichloromethane)65. phenol66. bis(2-ethylhexyl) phthalate68. di-n-butyl phthalate70. diethyl phthalate85. tetrachloroethylene [50 FR 45247, Oct. 30, 1985; 51 FR 21762, June 16, 1986]