The definitions in 40 CFR part 401 and the chemical analysis methods in 40 CFR part 136 apply to this subpart.

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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 tetrachloride 1,2 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]