California Air Resources Board 2009 Almanac (web)																									
Appendix C	San Francisco Bay Area		Table C_15																						
TAC	Alameda	Contra Costa	Marin	Napa	San Francisco	San Mateo	Santa Clara	Solano	Sonoma																
Acetaldehyde	264	224	66	43	128	130	268	116	110																
Benzene	328	271	87	62	150	166	357	99	114																
"1,3-Butadiene"	70	61	26	30	28	44	82	40	34																
Carbon Tetrachloride	< .01	2.12	< .01	< .01	0	< .01	< .01	< .01	< .01																
Chromium (Hexavalent)	< .01	0.01	< .01	< .01	< .01	< .01	0.01	< .01	< .01																
para-DiChlorobenzene	62	41	11	5	33	31	72	12	17																
Formaldehyde	599	533	132	93	299	328	629	321	204																
Methylene Chloride	201	112	31	16	101	100	251	33	61																
Perchloroethylene	184	110	35	14	94	92	191	27	41																
Diesel PM	1033	751	135	95	671	315	767	163	221