§ 4801. Definitions. When used in this article:

1. "Workplace" means any location away from the home, permanent or
temporary, where any employee performs any work-related duty in the
course of his employment.

2. "Toxic substance" means any substance which is listed in the latest
printed edition of the National Institute for Occupational Safety and
Health Registry of Toxic Effects of Chemical Substances or has yielded
positive evidence of acute or chronic health hazards in human, animal or
other biological testing.

3. "Employer" means any individual, partnership, corporation or
association engaged in a business who has employees including the state
and its political subdivisions. The term "employer" does not include the
employment of domestic workers or casual laborers employed at the place
of residence of his or her employer.