Specialized definitions.

For the purpose of this subpart: (a) Total Toxic Organics ( TTO ). TTO is a regulated parameter under PSES (§ 464.25) and PSNS (§ 464.26) for the copper 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 (§§ 464.25(a) and 464.26(a)): 23. chloroform (trichloromethane) 64. pentachlorophenol 66. bis(2-ethylhexyl)phthalate 71. dimethyl phthalate (2) Dust Collection Scrubbers (§ 464.25(c) and 464.26(c)): 1. acenaphthene 22. para-chloro meta-cresol 23. chloroform (trichloromethane) 34. 2,4-dimethylphenol 55. naphthalene 58. 4-nitrophenol 64. pentachlorophenol 65. phenol 66. bis(2-ethylhexyl)phthalate 67. butyl benzyl phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 71. dimethyl phthalate 72. benzo(a)anthracene (1,2-benzanthracene) 74. 3,4-benzofluoranthene 75. benzo(k) fluoranthene 76. chrysene 77. acenaphthylene 78. anthracene 81. phenanthrene 84. pyrene (3) Investment Casting (§ 464.25(e) and § 464.26(e)): 1. acenaphthene 22. para-chloro meta-cresol 23. chloroform (trichloromethane) 34. 2,4-dimethylphenol 55. naphthalene 58. 4-nitrophenol 64. pentachlorophenol 65. phenol 66. bis (2-ethylhexyl)phthalate 67. butyl benzyl phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 71. dimethyl phthalate 72. benzo(a)anthracene (1,2-benzanthracene) 74. 3,4-benzofluoranthene 75. benzo(k) fluoranthene 76. chrysene 77. acenaphthylene 78. anthracene 81. Phenanthrene 84. pyrene (4) Melting Furnace Scrubber (§ 464.25(f) and § 464.26(f)): 1. acenaphthene 22. para-chloro meta-cresol 23. chloroform (trichloromethane) 34. 2,4-dimethylphenol 55. naphthalene 58. 4-nitrophenol 64. pentachlorophenol 65. phenol 66. bis (2-ethylhexyl) phthalate 67. butyl benzyl phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 71. dimethyl phthalate 72. benzo(a)anthracene (1,2-benzanthracene) 74. 3,4-benzoflouranthene 75. benzo(k) flouranthene 76. chrysene 77. acenaphthylene 78. anthracene 81. phenanthrene 84. pyrene (5) Mold Cooling (§ 464.25(g) and § 464.26(g)): 23. chloroform (trichloromethane) 64. pentachlorophenol 66. bis(2-ethylhexyl)phthalate 71. dimethyl phthalate