Appendix C	Air Quality and Health Risk		Table C-43										

PLACER - Roseville - North Sunrise Blvd - Annual Average Concentrations and Health Risks													
TAC	Conc.*/ Risk**	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Acetaldehyde	Annual Avg					0.96	0.25	0.9	0.93	0.88		0.77	0.39
	Health Risk					5	1	4	4	4		4	2
Benzene	Annual Avg					0.91	0.75	0.44	0.46	0.45	0.48	0.39	0.34
	Health Risk					84	70	40	42	42	44	36	32
"1,3-Butadiene"	Annual Avg					0.194	0.167	0.135	0.121	0.138	0.107	0.096	0.093
	Health Risk					73	63	51	46	52	40	36	35
Carbon Tetrachloride	Annual Avg						0.099	0.077				0.094	0.087
	Health Risk						26	20				25	23
Chromium (Hexavalent)	Annual Avg					0.13	0.19	0.11	0.1	0.1	0.1	0.1	
	Health Risk					19	29	16	15	15	15	15	
para-Dichlorobenzene	Annual Avg					0.28	0.17	0.1	0.15			0.1	0.13
	Health Risk					19	11	7	10			7	9
Formaldehyde	Annual Avg					1.71	1.78	2.52	2.42	2.42		2.25	1.57
	Health Risk					13	13	19	18	18		17	12
Methylene Chloride	Annual Avg					0.82	0.54	0.5	0.5			0.52	0.23
	Health Risk					3	2	2	2			2	0.8
Perchloroethylene	Annual Avg					0.065	0.051	0.061	0.063			0.047	0.031
	Health Risk					3	2	2	3			2	1
Diesel PM	Annual Avg	No Monitoring Data Available											
	Health Risk												
Total Health Risk		0	0	0	0	219	217	161	140	131	99	144	114.8

*    Concentrations for Chromium (Hexavalent) are expressed as ng/m3 and concentrations for Diesel PM are expressed as ug/m3.  Concentrations for all other TACs are expressed as parts per billion.													
**   Health Risk represents the number of excess cancer cases per million people based on a lifetime (70-year) exposure to the annual average concentration.  Total Health Risk represents only those compounds													
listed in this table and only those with data for that year.  There may be other significant compounds for which monitoring and/or health risk information are not available.