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	2007
Acetaldehyde	Annual Avg		2.29		1.89	1.4	0.67			1.5		1.43	1.6	1.55	1.71	1.27	1.63	1.63	1.32
	Health Risk		11		9	7	3			7		7	8	8	8	6	8	8	6
Benzene	Annual Avg		2.42	1.34	1.35	1.44	1.24	0.79	1	0.83	0.8	0.73	0.61	0.631	0.546	0.403	0.408	0.387	0.374
	Health Risk		224	124	125	133	115	73	92	76	74	68	56	58	51	37	38	36	35
"1,3-Butadiene"	Annual Avg		0.459	0.262	0.342	0.356	0.3	0.234	0.233	0.265	0.214	0.195	0.182	0.194	0.127	0.098	0.101	0.082	0.086
	Health Risk		173	99	129	134	113	88	87	100	80	73	68	73	48	37	38	31	32
Carbon Tetrachloride	Annual Avg		0.122		0.108		0.099	0.078				0.095	0.086	0.089	0.097				
	Health Risk		32		28		26	21				25	23	23	26				
"Chromium, Hexavalent"	Annual Avg			0.21	0.15	0.14	0.22	0.1	0.11	0.1	0.1	0.13		0.058	0.05	0.073	0.063	0.058	0.15
	Health Risk			31	22	21	33	16	16	15	15	20		9	8	11	9	9	23
para-Dichlorobenzene	Annual Avg			0.1	0.1	0.14	0.13	0.11	0.14			0.1	0.14	0.15	0.15	0.15	0.15	0.15	
	Health Risk			7	7	9	8	7	9			7	9	10	10	10	10	10	
Formaldehyde	Annual Avg		2.32		1.64	2.01	2.41			3.42		3.56	4.32	4.16	3.72	2.57	3	3.41	2.88
	Health Risk		17		12	15	18			25		26	32	31	27	19	22	25	21
Methylene Chloride	Annual Avg		0.62	0.54	0.69	0.59	0.58	0.5	0.52			0.5	0.27	0.24	0.15	0.14	0.15	0.14	0.12
	Health Risk		2	2	2	2	2	2	2			2	<1	<1	<1	<1	<1	<1	<1
Perchloroethylene	Annual Avg		0.142	0.102	0.1	0.062	0.065	0.041	0.043			0.056	0.046	0.034	0.031	0.023	0.028	0.02	0.015
	Health Risk		6	4	4	2	3	2	2			2	2	1	1	<1	1	<1	<1
Diesel PM	Annual Avg																		
	Health Risk																		
Total Health Risk			465	267	338	323	321	209	208	223	169	230	198	213	179	120	126	119	117

Fresno																			
Fresno-1st Street