A report produced by the California Environmental Protection Agency (CalEPA), calls for tighter controls on chemicals including workplace carcinogens. The report found 109 chemicals recognised in California as cancer-causing are not regulated as occupational carcinogens, with 44 of these not even having a permissible exposure limit for the workplace.

Occupational Health Hazard Risk Assessment Project for California. Complete OEHHA technical report. Risks 339.