Appendix C	Placer County: Roseville-N Sunrise Blvd Air Quality and Health Risk													Table C-44	

Annual Average Concentrations and Health Risks															
TAC	Conc.*/Risk**	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003
Acetaldehyde	Annual Avg					0.96	0.25	0.90	0.93	0.88		0.77	0.39	0.95	0.93
	Health Risk					5	1	4	4	4		4	2	5	5
Benzene	Annual Avg					0.91	0.75	0.44	0.46	0.45	0.48	0.39	0.34	0.34	0.36
	Health Risk					84	70	40	42	42	44	36	32	32	34
"1,3-Butadiene"	Annual Avg					0.19	0.17	0.14	0.12	0.14	0.11	0.10	0.09	0.08	0.08
	Health Risk					73	63	51	46	52	40	36	35	29	29
Carbon Tetrachloride	Annual Avg						0.10	0.08				0.09	0.09	0.09	0.09
	Health Risk						26	20				25	23	24	25
"Chromium, Hexavalent"	Annual Avg					0.13	0.19	0.11	0.10	0.10	0.10	0.10		0.05	0.05
	Health Risk					19	29	16	15	15	15	15		7	8
para-Dichlorobenzene	Annual Avg					0.28	0.17	0.10	0.15			0.10	0.13	0.15	0.15
	Health Risk					19	11	7	10			7	9	10	10
Formaldehyde	Annual Avg					1.71	1.78	2.52	2.42	2.42		2.25	1.57	3.12	3.23
	Health Risk					13	13	19	18	18		17	12	23	24
Methylene Chloride	Annual Avg					0.82	0.54	0.50	0.50			0.52	0.23	0.08	0.09
	Health Risk					3	2	2	2			2	1	0	0
Perchloroethylene	Annual Avg					0.07	0.05	0.06	0.06			0.05	0.03	0.03	0.02
	Health Risk					3	2	2	3			2	1	1	1
Diesel PM	Annual Avg	No Monitoring Data Available													
	Health Risk														
Total Health Risk						219	217	161	140	131	99	144	115	131	136

"*    Concentrations for Hexavalent Chromium are expressed as ng/m3, and concentrations for Diesel PM are expressed as ug/m3.  Concentrations for all other TACs are expressed as ppb."															
**  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.