The definitions in 40 CFR part 401 and the chemical analysis methods in 40 CFR part 136 apply to this subpart. In addition,
(a) The term ``total toxic organics (TTO)'' means the sum of the concentrations for each of the following toxic organic compounds which is found in the discharge at a concentration greater than ten (10) micrograms per liter: 1,2,4 Trichlorobenzene chloroform1,2 Dichlorobenzene1,3, Dichlorobenzene1,4, Dichlorobenzene ethylbenzene1,1,1 Trichloroethane methylene chloride naphthalene2 Nitrophenol phenol bis (2-ethylhexyl) phthalate tetrachloroethylene toluene trichloroethylene2 Chlorophenol2,4 Dichlorophenol4 Nitrophenol pentachlorophenol di-n-butyl phthalate anthracene1,2 Diphenylhydrazine isophorone butyl benzyl pthalate1,1 Dichloroethylene2,4,6 Trichlorophenol carbon tetrachloride1,2 Dichloroethane1,1,2 Trichloroethane dichlorobromomethane
(b) The term ``semiconductors'' means solid state electrical devices which perform functions such as information processing and display, power handling, and interconversion between light energy and electrical energy.
(c) The term ``manufacture of semiconductors'' means those processes, beginning with the use of crystal wafers, which lead to or are associated with the manufacture of semiconductor devices. [48 FR 15394, Apr. 8, 1983, as amended at 48 FR 45250, Oct. 4, 1983]