Lewis Dictionary of Occupational and Environmental Safety and Health by Jeffrey W. Vincoli. Occupational and environmental safety and health disciplines are, indeed, separate functions. However,changes in the way corporate America does business has forced a continued divergence of the two professions.This development has created a drastic need for new, quick-reference sources of knowledge and information. The more complete and comprehensive the source, the more beneficial it will be to the user. This Lewis Dictionary of Occupational and Environmental Safety and Health is an attempt to fill this need and provide the professional with the single-source of reference for defining the thousands of words, terms, and phrases they are faced with literally every working day.