Appendix C	Air Quality and Health Risk		Table C-33										

FRESNO - Fresno - 1st Street - Annual Average Concentrations and Health Risks													
TAC	Conc.*/ Risk**	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Acetaldehyde	Annual Avg		2.29		1.89	1.4	0.67			1.5		1.43	1.6
	Health Risk		11		9	7	3			7		7	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
	Health Risk		224	124	125	133	115	73	92	76	74	68	56
"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
	Health Risk		173	99	129	134	113	88	87	100	80	73	68
Carbon Tetrachloride	Annual Avg		0.122		0.108		0.099	0.078				0.095	0.086
	Health Risk		32		28		26	21				25	23
Chromium (Hexavalent)	Annual Avg			0.21	0.15	0.14	0.22	0.1	0.11	0.1	0.1	0.13	
	Health Risk			31	22	21	33	16	16	15	15	20	
para-Dichlorobenzene	Annual Avg			0.1	0.1	0.14	0.13	0.11	0.14			0.1	0.14
	Health Risk			7	7	9	8	7	9			7	9
Formaldehyde	Annual Avg		2.32		1.64	2.01	2.41			3.42		3.56	4.32
	Health Risk		17		12	15	18			25		26	32
Methylene Chloride	Annual Avg		0.62	0.54	0.69	0.59	0.58	0.5	0.52			0.5	0.27
	Health Risk		2	2	2	2	2	2	2			2	0.9
Perchloroethylene	Annual Avg		0.142	0.102	0.1	0.062	0.065	0.041	0.043			0.056	0.046
	Health Risk		6	4	4	2	3	2	2			2	2
Diesel PM	Annual Avg	No Monitoring Data Available											
	Health Risk												
Total Health Risk		0	465	267	338	323	321	209	208	223	169	230	198.9

*    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.