Code of Federal Regulations Title 40. Protection of Environment § 40.469.22 Specialized definitions

(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 chloroform

1,2 Dichlorobenzene

1,3, Dichlorobenzene

1,4, Dichlorobenzene ethylbenzene

1,1,1 Trichloroethane methylene chloride naphthalene

2 Nitrophenol phenol bis (2–ethylhexyl) phthalate tetrachloroethylene toluene trichloroethylene

2 Chlorophenol

2,4 Dichlorophenol

4 Nitrophenol pentachlorophenol di-n-butyl phthalate anthracene

1,2 Diphenylhydrazine isophorone butyl benzyl pthalate

1,1 Dichloroethylene

2,4,6 Trichlorophenol carbon tetrachloride

1,2 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 indium 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.