Describes U. S. federally regulated industrial workers who are designated to enter confined spaces and who meet the following training require ments for each specific space they enter: (a) Hazard Recognition. The ability to recognize the signs and symp?toms of exposure to a hazardous material or atmos phere within the space and to understand the consequences of exposure and the mode of transmission (i. e. , injection, ingestion, inhalation, or absorption) for the hazard, (b) Communications. The ability to carry out the method by which rescue services are to be sum moned in the event of an emergency, the method by which the entrant will communicate with the attendant on the outside of the space, and a backup method of communication should the primary system fail, (c) Personal Protective Equipment (PPE). The ability to use all PPE appropriate for the confined space, (d) Self-Rescue. The ability to carry out the method by which the entrant will escape from the space should an emer?gency occur. NFPA 1670, 1999 ed