Appendix C	Los Angeles County: Burbank - West Palm Avenue Air Quality and Health Risk													Table C-20			

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
Acetaldehyde	Annual Avg	3.16	3.89	 	3.06	2.46	0.79	 	 	1.94	2.7	1.7	1.93	1.96	 	1.77	2.15
	Health Risk	15	19	 	15	12	4	 	 	9	13	8	9	10	 	9	10
Benzene	Annual Avg	4.79	3.91	3.44	2.63	3.33	2.45	1.91	1.48	1.66	1.64	1.27	1.06	1.01	 	0.754	0.832
	Health Risk	444	362	319	244	308	227	177	137	154	151	117	98	93	 	70	77
"1,3-Butadiene"	Annual Avg	0.782	0.623	0.725	0.749	0.752	0.605	0.512	0.421	0.483	0.483	0.345	0.328	0.283	 	0.18	0.196
	Health Risk	294	234	272	282	283	227	192	158	182	181	130	123	106	 	68	74
Carbon Tetrachloride	Annual Avg	0.141	0.133	 	 	 	0.104	0.082	 	0.114	 	0.094	0.086	0.091	 	 	
	Health Risk	37	35	 	 	 	28	22	 	30	 	25	23	24	 	 	
"Chromium, Hexavalent"	Annual Avg	 	 	0.65	0.37	0.43	1.24	 	 	0.23	0.2	0.19	 	0.123	 	0.113	0.113
	Health Risk	 	 	97	55	64	186	 	 	34	29	28	 	18	 	17	17
para-Dichlorobenzene	Annual Avg	 	0.23	0.22	0.19	0.14	0.2	0.1	0.11	 	 	0.13	0.15	0.17	 	0.17	0.15
	Health Risk	 	15	15	12	9	13	7	7	 	 	8	10	11	 	11	10
Formaldehyde	Annual Avg	4.05	3.59	 	3.66	3.92	4.58	 	 	4.72	6.07	4.14	4.87	5.48	 	3.85	4.42
	Health Risk	30	26	 	27	29	34	 	 	35	45	30	36	40	 	28	33
Methylene Chloride	Annual Avg	3.25	1.69	1.42	2.01	1.94	1.82	1.41	1.11	1.07	 	0.8	0.6	0.6	 	0.41	0.42
	Health Risk	11	6	5	7	7	6	5	4	4	 	3	2	2	 	1	1
Perchloroethylene	Annual Avg	1.19	0.785	0.609	0.62	0.663	0.487	0.44	0.365	0.503	 	0.368	0.296	0.247	 	0.151	0.135
	Health Risk	48	31	24	25	26	19	18	15	20	 	15	12	10	 	6	5
Diesel PM	Annual Avg	No Monitoring Data Available															
	Health Risk																
Total Health Risk		879	728	732	667	738	744	421	321	468	419	364	313	314	 	210	227
																	
"1  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."																	
2  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.