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	1.28	1.6	1.02	1.28	1.23	0.35	0.88	0.65	0.72					0.69	0.69	0.71	0.62
	Health Risk	6	8	5	6	6	2	4	3	4					3	3	3	3
Benzene	Annual Avg	1.92	1.67	1.21	1.35	1.25	1.24	0.58		0.76	0.61	0.53	0.439	0.418	0.356	0.286		0.295
	Health Risk	178	155	112	125	116	115	54		71	57	49	41	39	33	26		27
"1,3-Butadiene"	Annual Avg	0.283	0.259	0.193	0.321	0.252	0.27	0.199		0.238	0.176	0.136	0.132	0.116	0.078	0.049		0.054
	Health Risk	106	97	72	120	95	101	75		90	66	51	50	43	29	19		20
Carbon Tetrachloride	Annual Avg	0.131	0.127		0.105		0.101	0.076				0.095	0.085	0.089	0.096			
	Health Risk	35	34		28		27	20				25	23	24	25			
"Chromium, Hexavalent"	Annual Avg			0.2	0.19	0.21	0.2	0.11		0.1	0.1	0.1			0.045	0.053	0.05	0.03
	Health Risk			30	28	32	30	16		15	15	16			7	8	8	5
para-Dichlorobenzene	Annual Avg			0.11	0.11	0.1	0.12	0.1				0.1	0.13	0.15	0.16	0.15		0.15
	Health Risk			7	7	7	8	7				7	9	10	11	10		10
Formaldehyde	Annual Avg	1.84	1.98	1.3	1.37	1.78	2.02	2.16	1.79	1.96					2.15	1.46	1.21	1.52
	Health Risk	14	15	10	10	13	15	16	13	14					16	11	9	11
Methylene Chloride	Annual Avg	0.76	0.58	0.52	0.83	0.5	0.62	0.5				0.5	0.28	0.23	0.3	0.1		0.2
	Health Risk	3	2	2	3	2	2	2				2	1	<1	1	<1		<1
Perchloroethylene	Annual Avg	0.189	0.21	0.134	0.114	0.086	0.118	0.069				0.083	0.056	0.05	0.039	0.029		0.024
	Health Risk	8	8	5	5	3	5	3				3	2	2	2	1		<1
Diesel PM	Annual Avg																	
	Health Risk																	
Total Health Risk		350	319	243	332	274	305	197	16	194	138	153	126	118	127	78	20	76
																		
Alameda																		
Fremont-Chapel Way