“Beneficiating processor” means any person certified by the department as a processor who also beneficiates purchased cullet so that it is furnace ready for glass container manufacturers, consistent with prevailing standards in the manufacturing industry. Cullet shall be deemed furnace ready when it has been cleansed, is free of nonglass contaminants, and has been crushed or otherwise processed in such a manner as to be acceptable without further processing by the purchasing glass container manufacturer.