For those interested, here is a link to a document prepared by OSHA.
https://www.osha.gov/Publications/OSHA3990.pdf
David Conklin
Director
Genesee District Library
(810) 230-3335 Office
(810) 732-1161 Fax
Genesee District Library Headquarters
4195 W. Pasadena Avenue
Flint, MI 48504