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											1.1	1.31		1.25	1.53	1.86	
	Health Risk											5	6		6	7	9	
Benzene	Annual Avg											0.69		0.621	0.598	0.432	0.512	0.376
	Health Risk											64		57	55	40	47	35
"1,3-Butadiene"	Annual Avg											0.146		0.135	0.076	0.076	0.078	0.061
	Health Risk											55		51	29	29	29	23
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	
	Health Risk											19			14	11	12	
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	
	Health Risk											22	28		25	22	27	
Methylene Chloride	Annual Avg											1.32		1	0.96	1.43	1.26	0.56
	Health Risk											5		3	3	5	4	2
Perchloroethylene	Annual Avg											0.183		0.153	0.109	0.063	0.076	0.05
	Health Risk											7		6	4	3	3	2
Diesel PM	Annual Avg																	
	Health Risk																	
Total Health Risk												208	34	151	171	127	141	72






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