On or before January 1, 1994, the department shall request comments from at least two fiberglass manufacturers, two cullet processors, and any other interested parties on the feasibility of increasing the percentage of cullet in fiberglass to 30 percent. On or before July 1, 1994, the department shall hold a public hearing, on the record, with representatives from the fiberglass industry, cullet processors, and other interested parties to determine the feasibility of increasing cullet content in fiberglass manufacturing.