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											1.1	1.31		1.25	1.53	1.86		1.11
	Health Risk											5	6		6	7	9		5
Benzene	Annual Avg											0.69		0.621	0.598	0.432	0.512	0.376	0.42
	Health Risk											64		57	55	40	47	35	39
"1,3-Butadiene"	Annual Avg											0.146		0.135	0.076	0.076	0.078	0.061	0.298
	Health Risk											55		51	29	29	29	23	112
Carbon Tetrachloride	Annual Avg											0.093		0.09	0.095				
	Health Risk											24		24	25				
"Chromium, Hexavalent"	Annual Avg											0.12			0.09	0.073	0.08		0.065
	Health Risk											19			14	11	12		10
para-Dichlorobenzene	Annual Avg											0.1		0.15	0.15	0.15	0.15	0.15	
	Health Risk											7		10	10	10	10	10	
Formaldehyde	Annual Avg											3.05	3.8		3.45	3.04	3.62		2.94
	Health Risk											22	28		25	22	27		22
Methylene Chloride	Annual Avg											1.32		1	0.96	1.43	1.26	0.56	0.63
	Health Risk											5		3	3	5	4	2	2
Perchloroethylene	Annual Avg											0.183		0.153	0.109	0.063	0.076	0.05	0.052
	Health Risk											7		6	4	3	3	2	2
Diesel PM	Annual Avg																		
	Health Risk																		
Total Health Risk												208	34	151	171	127	141	72	192




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