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:

2-Acetylaminofluorene Acrylonitrile Alpha-Naphthylamine
4-Aminodiphenyl Inorganic Arsenic Asbestos
Benzene Benzidine Beta-Naphthylamine
Beta-Propiolactone Bis-Chloromethyl Ether 1,3 Butadiene
Cadmium 13 Carcinogens Hexavalent Chromium
Coal Tar Pitch Volatiles Coke Oven Emissions Cotton Dust
1,2-Dibromo-3-Chloropropane 3-'Dichlorobenzidine (and salts) 4-Dimethylaminoazobenzene
Ethyleneimine Ethylene Oxide Formaldehyde
Lead (except Construction & Agriculture) Methyl Chloromethyl Ether Methylene Chloride
Methylenedianiline N-Nitrosodimethylamine Vinyl Chloride

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 PEL's Table (Z-1)

OSHA PEL's Table (Z-2)  

OSHA PEL's Table (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).

OSHA Ventilation Standard (29 CFR Part 1910.94)