California Air Resources Board 2008 Almanac (web)																		
Annual Average Concentrations and Health Risks																		
TAC	Conc.1/Risk2	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006
Acetaldehyde	Annual Avg																	
	Health Risk																	
Benzene	Annual Avg									0.98								
	Health Risk									91								
"1,3-Butadiene"	Annual Avg									0.244								
	Health Risk									92								
Carbon Tetrachloride	Annual Avg									0.114								
	Health Risk									30								
"Chromium, Hexavalent"	Annual Avg																	
	Health Risk																	
para-Dichlorobenzene	Annual Avg																	
	Health Risk																	
Formaldehyde	Annual Avg																	
	Health Risk									
Methylene Chloride	Annual Avg									0.59
	Health Risk									2
Perchloroethylene	Annual Avg									0.179
	Health Risk									7
Diesel PM	Annual Avg									
	Health Risk									
Total Health Risk										222