567—122.16 (455B,455D) Further requirements for circuit boards for CRT recycling facilities. Spent circuit boards are regulated as scrap metal when recycled and stored in containers sufficient to prevent a release into the environment and the circuit board contains only minor battery or mercury switching components. If minor batteries and mercury switching components are removed, the minor batteries or mercury switching components may be universal waste under 40 CFR Part 273 or a hazardous waste under 40 CFR Parts 261, 262, and 263.