For the purpose of this subpart:
(a) Total toxic organics (TTO). TTO is a regulated parameter under PSES (Sec. 464.15) and PSNS (Sec. 464.16) for the aluminum 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. 464.15(b) and Sec. 464.16(b)): 4. benzene21. 2,4,6-trichlorophenol22. Para-chloro meta-cresol23. chloroform (trichloromethane)34. 2,4-dimethylphenol39. fluoranthene44. methylene chloride (dichloromethane)65. phenol66. bis(2-ethylhexyl) phthalate67. butyl benzyl phthalate84. pyrene85. tetrachloroethylene87. trichloroethylene
(2) Die Casting (Sec. 464.15(c) and Sec. 464.16(c)): 1. acenaphthene4. benzene7. chlorobenzene11. 1,1,1-trichloroethane21. 2,4,6-trichlorophenol22. para-chloro meta-cresol23. chloroform (trichloromethane)34. 2,4-dimethylphenol39. fluoranthene44. methylene chloride (dichloromethane)55. naphthalene65. phenol66. bis(2-ethylhexyl) phthalate67. butyl benzyl phthalate68. di-n-butyl phthalate70. diethyl phthalate72. benzo (a)anthracene (1,2-benzanthracene)73. benzo (a)pyrene (3,4-benzopyrene)76. chrysene78. anthracene80. fluorene81. phenanthrene84. pyrene85. tetrachloroethylene86. toluene
(3) Dust Collection Scrubber (Sec. 464.15(d) and Sec. 464.16(d)): 1. acenaphthene21. 2,4,6-trichlorophenol23. chloroform (trichloromethane)34. 2,4-dimethylphenol39. fluoranthene44. methylene chloride (dichloromethane)65. phenol66. bis (2-ethylhexyl) phthalate68. di-n-butyl phthalate70. diethyl phthalate73. benzo (a)pyrene (3,4-benzopyrene)84. pyrene
(4) Investment Casting (Sec. 464.15(f) and Sec. 464.16(f)): 11. 1,1,1-trichloroethane23. chloroform (trichloromethane)44. methylene chloride (dichloromethane)66. bis (2-ethylhexyl) phthalate84. pyrene85. tetrachloroethylene87. trichloroethylene
(5) Melting Furnace Scrubber (Sec. 464.15(g) and Sec. 464.16(g)): 1. acenaphthene21. 2,4,6-trichlorophenol23. chloroform (trichloromethane)34. 2,4-dimethylphenol39. fluoranthene44. methylene chloride (dichloromethane)65. phenol66. bis (2-ethylhexyl) phthalate68. di-n-butyl phthalate70. diethyl phthalate73. benzo (a)pyrene (3,4-benzopyrene)84. pyrene
(6) Mold Cooling (Sec. 464.15(h) and Sec. 464.16(h)): 4. benzene21. 2,4,6-trichlorophenol22. para-chloro meta-cresol23. chloroform (trichloromethane)34. 2,4-dimethylphenol39. fluoranthene44. methylene chloride65. phenol66. bis(2-ethylhexyl) phthalate67. butyl benzyl phthalate84. pyrene85. tetrachloroethylene87. trichloroethylene