Appendix C	Fresno County: Fresno - 1st Street Air Quality and Health Risk													Table C-37			

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	 	2.29	 	1.89	1.4	0.67	 	 	1.5	 	1.43	1.6	1.55	1.71	1.27	1.63
	Health Risk	 	11	 	9	7	3	 	 	7	 	7	8	8	8	6	8
Benzene	Annual Avg	 	2.42	1.34	1.35	1.44	1.24	0.79	1	0.83	0.8	0.73	0.61	0.631	0.546	0.403	0.408
	Health Risk	 	224	124	125	133	115	73	92	76	74	68	56	58	51	37	38
"1,3-Butadiene"	Annual Avg	 	0.459	0.262	0.342	0.356	0.3	0.234	0.233	0.265	0.214	0.195	0.182	0.194	0.127	0.098	0.101
	Health Risk	 	173	99	129	134	113	88	87	100	80	73	68	73	48	37	38
Carbon Tetrachloride	Annual Avg	 	0.122	 	0.108	 	0.099	0.078	 	 	 	0.095	0.086	0.089	0.097	 	
	Health Risk	 	32	 	28	 	26	21	 	 	 	25	23	23	26	 	
"Chromium, Hexavalent"	Annual Avg	 	 	0.21	0.15	0.14	0.22	0.1	0.11	0.1	0.1	0.13	 	0.058	0.05	0.073	0.063
	Health Risk	 	 	31	22	21	33	16	16	15	15	20	 	9	8	11	9
para-Dichlorobenzene	Annual Avg	 	 	0.1	0.1	0.14	0.13	0.11	0.14	 	 	0.1	0.14	0.15	0.15	0.15	0.15
	Health Risk	 	 	7	7	9	8	7	9	 	 	7	9	10	10	10	10
Formaldehyde	Annual Avg	 	2.32	 	1.64	2.01	2.41	 	 	3.42	 	3.56	4.32	4.16	3.72	2.57	3
	Health Risk	 	17	 	12	15	18	 	 	25	 	26	32	31	27	19	22
Methylene Chloride	Annual Avg	 	0.62	0.54	0.69	0.59	0.58	0.5	0.52	 	 	0.5	0.27	0.24	0.15	0.14	0.15
	Health Risk	 	2	2	2	2	2	2	2	 	 	2	 <1	 <1	 <1	 <1	 <1
Perchloroethylene	Annual Avg	 	0.142	0.102	0.1	0.062	0.065	0.041	0.043	 	 	0.056	0.046	0.034	0.031	0.023	0.028
	Health Risk	 	6	4	4	2	3	2	2	 	 	2	2	1	1	 <1	1
Diesel PM	Annual Avg	No Monitoring Data Available															
	Health Risk																
Total Health Risk		 	465	267	338	323	321	209	208	223	169	230	198	213	179	120	126
																	
"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.