“Plastics” means synthetic materials chemically formed by the polymerization of carbon-based substances, usually compounded with modifiers, extenders, or reinforcers, and capable of being molded, extruded, cast into various shapes and films, or drawn into filaments.

Source. (See Revision Note at chapter heading for Env-A 1200) #9933, eff 6-1-11; ss by #12899, eff 10-17-19