“Used or reused material” means a material that is:

1. (a) Employed as an ingredient including use as an intermediate in an industrial process to make a product, for example, distillation bottoms from one process used as feedstock in another process, but excluding a material from which distinct components are recovered as separate end products, such as when metals are recovered from metal-containing secondary materials; or
2. (b) Employed in a particular function or application as an effective substitute for a commercial product, for example, spent pickle liquor used as a phosphorous precipitant and sludge conditioner in wastewater treatment.

Source. (See Revision Note #1 and Revision Note #2 at chapter heading for Env-Hw 100) #12343, eff 8-14-17; (formerly Env-Hw 104.79, renumbered by #13405) (See Revision Note #4 at chapter heading for Env-Hw 100) (formerly Env-Hw 104.83)