Specialized definitions

Specialized definitions. Specialized definitions. The following definitions apply to the terms used in this subchapter: (1) “Electronic crystals” means crystals or crystalline materials, such as crystals comprised of quartz, ceramic silicon, gallium arsenide, and indium arsenide, which, because of their unique structural and electrical properties, are used in electronic devices. (2) “TTO” means the sum of the concentrations of each of the following toxic organic compounds which is found in the discharge at a concentration greater than 10 micrograms per liter: