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 Dichloroethane 1,1,2 Trichloroethane dichlorobromomethane
(b) The term ``electronic crystals'' means crystals or crystalline material which because of their unique structural and electronic properties are used in electronic devices. Examples of these crystals are crystals comprised of quartz, ceramic, silicon, gallium arsenide, and idium arsenide.
(c) The term ``manufacture of electronic crystals'' means the growing of crystals and/or the production of crystal wafers for use in the manufacture of electronic devices. [48 FR 15394, Apr. 8, 1983, as amended at 48 FR 45250, Oct. 4, 1983]