TAC	Los Angeles (part)	Orange	Riverside (part)	San Bernardino (part)
Acetaldehyde	1624	549	261	315
Benzene	5914	2004	757	1037
"1,3-Butadiene"	1032	327	129	180
Carbon tetrachloride	1.84	0.09	0.02	< .01
Chromium (Hexavalent)	0.5411	0.0724	0.1816	0.0699
para-Dichlorobenzene	434	135	56	61
Formaldehyde	4999	1568	699	850
Methylene Chloride	2675	976	230	436
Perchloroethylene	3431	1552	336	462
Diesel PM	4639	1763	865	757