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Several thousand raw materials ranging from naturally occurring minerals to highly toxic biocidal agents are employed in the manufacture of coatings and resins. The batch-type operations of this industry require employees to handle many different materials each day, so an easily recognizable and effective hazardous materials warning system is requisite. Such a system has been developed in the Coatings and Resins Division of PPG Industries and is called the "Safety and Health Index System". With this system, it is now possible for PPG employees to know the potential health, flammability and reactivity hazards associated with each bag or drum they may handle and take the necessary precautions to protect themselves.

The Safety and Health Index System (SHIS) has developed beyond its initial role as an in-plant labeling system. It has evolved into a classification scheme to rank the hazards found in the workplace and is useful in prioritizing industrial hygiene monitoring programs, installation of engineering controls, and implementation of medical monitoring for chronic hazards. In addition to providing objective criteria on which to evaluate physical and acute health hazards, this system addresses chronic health hazards such as carcinogens, mutagens, teratogens, and reproductive toxins.

tion tests using a standard household heating system to show the general applicability of HVO-containing blends. Although the investigations are conducted with DHO and household heating systems, the results can be transferred to other applications in which middle distillates are applied, such as the automotive sector (diesel fuel) and aviation (kerosene).