Office of Environmental Health Hazard Assessment
This stub is a work-in-progress by the ScienceCorruption.com journalists's group. We are indexing the millions of documents stored at the San Francisco Uni's Legacy Tobacco Archive  With some entries you'll need to go to this site and type into the Search panel a (multi-digit) Bates number. You can search on names for other documents also. Send any corrections or additions to firstname.lastname@example.org
The Californian Office of Environmental Health Hazards Assessment' (OEHHA) was a subsection of the Californian Environmental Protection Agency which was charged with the responsibility for California's famous Clean-air/Clean-water initiative known as Proposition 65.
The OEHHA was a lineal descendent of the Health Hazard Assessment Division (HHAD) of the Department of Health Services (DHS). The tobacco industry tried to challenge the rights of the OEHHA to conduct a risk assessment on tobacco smoke using legal arguments based on a formal transfer of powers here. 
Documents & Timeline
1992 Oct The OEHHA ad ARB ?? sponsored a workshop the the health effects and exposures of the public to second-hand smoke (ETS). In December of this year the Federal EPA released "The Respiratory Health Effects of Passive Smoking: Lung Cancer and Other Disorders." The OEHHA built on this and reviewed subsequent literature.
1998 Jan the Proposition 65 Scientific Advisory Panel make a finding that tobacco smoke had been shown to cause cancer and added ETS to the Prop 65 list of carcinogens in April 1988. See Chronology of events 1992-98