The Occupational Safety and Health Administration (OSHA) has established several comprehensive standards for select chemical agents. These 'vertical standards,' involve all aspects of exposure management, and can be referenced at the OSHA Regulations Part 1910, as follows:
OSHA Air Contaminant Standards - OSHA has established allowable exposure criteria, or permissible exposure limits (PEL's) for many other air contaminants, ranging from 15- or 30-minute concentrations, to exposure levels which persons may be exposed to for an entire 8-hour work shift. The OSHA PEL's are presented at OSHA Titlle 29 CFR Part 1910.1000, Tables Z-1 through Z-3.
OSHA Annotated Exposure Limits - Chemical-by-chemical comparison of allowable exposure limits established by U.S. agencies including: the OSHA PEL's, the NIOSH Recommended Exposure Limits (REL's), and the ACGIH Threshold Limit Values (TLV's).
Respirable Crystalline Silica Standards