The provision of information to a public employee pursuant to the provisions of this subchapter shall not be construed to affect the liability of a public employer with regard to the health and safety of a public employee or other persons exposed to hazardous chemicals, nor shall it affect the public employer's responsibility to take any action to prevent the occurrence of occupational disease as required under any other provision of law. The provision of information to a public employee shall not affect any other duty or responsibility of a chemical manufacturer or distributor to warn ultimate users of a hazardous chemical under any other provision of law.