Hazardous Materials. Those who come in contact with them need to protect themselves. But if they do not know what hazards the material presents adequate protection is hard to provide. This program teaches methods to properly identify hazards so proper protection and plans can be developed to protect everyone on site. Designed to complement a variety of HAZWOPER applications. Includes definitions of TLV, TWA, TLV-C, methods of exposure, dust, fumes, gases and more.