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		1.51	1.37	1.75	1.44	0.51	1.17	1.25									
	Health Risk		7	7	8	7	2	6	6									
Benzene	Annual Avg																	
	Health Risk																	
"1,3-Butadiene"	Annual Avg																	
	Health Risk																	
Carbon Tetrachloride	Annual Avg																	
	Health Risk																	
"Chromium, Hexavalent"	Annual Avg			0.27	0.23	0.22	0.32	0.16	0.11									
	Health Risk			40	34	33	48	25	17									
para-Dichlorobenzene	Annual Avg																	
	Health Risk																	
Formaldehyde	Annual Avg		1.43	1.32	1.82	1.86	2.16	2.58	2.43									
	Health Risk		11	10	13	14	16	19	18
Methylene Chloride	Annual Avg								
	Health Risk								
Perchloroethylene	Annual Avg								
	Health Risk								
Diesel PM	Annual Avg								
	Health Risk								
Total Health Risk			18	57	55	54	66	50	41


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