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	3.16	3.89		3.06	2.46	0.79			1.94	2.7	1.7	1.93	1.96		1.77	2.15	1.74
	Health Risk	15	19		15	12	4			9	13	8	9	10		9	10	8
Benzene	Annual Avg	4.79	3.91	3.44	2.63	3.33	2.45	1.91	1.48	1.66	1.64	1.27	1.06	1.01		0.754	0.832	0.689
	Health Risk	444	362	319	244	308	227	177	137	154	151	117	98	93		70	77	64
"1,3-Butadiene"	Annual Avg	0.782	0.623	0.725	0.749	0.752	0.605	0.512	0.421	0.483	0.483	0.345	0.328	0.283		0.18	0.196	0.169
	Health Risk	294	234	272	282	283	227	192	158	182	181	130	123	106		68	74	64
Carbon Tetrachloride	Annual Avg	0.141	0.133				0.104	0.082		0.114		0.094	0.086	0.091				
	Health Risk	37	35				28	22		30		25	23	24				
"Chromium, Hexavalent"	Annual Avg			0.65	0.37	0.43	1.24			0.23	0.2	0.19		0.123		0.113	0.113	0.115
	Health Risk			97	55	64	186			34	29	28		18		17	17	17
para-Dichlorobenzene	Annual Avg		0.23	0.22	0.19	0.14	0.2	0.1	0.11			0.13	0.15	0.17		0.17	0.15	0.15
	Health Risk		15	15	12	9	13	7	7			8	10	11		11	10	10
Formaldehyde	Annual Avg	4.05	3.59		3.66	3.92	4.58			4.72	6.07	4.14	4.87	5.48		3.85	4.42	3.95
	Health Risk	30	26		27	29	34			35	45	30	36	40		28	33	29
Methylene Chloride	Annual Avg	3.25	1.69	1.42	2.01	1.94	1.82	1.41	1.11	1.07		0.8	0.6	0.6		0.41	0.42	0.3
	Health Risk	11	6	5	7	7	6	5	4	4		3	2	2		1	1	1
Perchloroethylene	Annual Avg	1.19	0.785	0.609	0.62	0.663	0.487	0.44	0.365	0.503		0.368	0.296	0.247		0.151	0.135	0.094
	Health Risk	48	31	24	25	26	19	18	15	20		15	12	10		6	5	4
Diesel PM	Annual Avg																	
	Health Risk																	
Total Health Risk		879	728	732	667	738	744	421	321	468	419	364	313	314		210	227	197
																		


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