California Air Resources Board 2008 Almanac (web)																								
Appendix C	San Francisco Bay Area		Table C_13																					
TAC	Alameda	Contra Costa	Marin	Napa	San Francisco	San Mateo	Santa Clara	Solano	Sonoma															
Acetaldehyde	381	209	56	44	146	156	298	122	107															
Benzene	389	293	97	70	162	192	395	108	130															
"1,3-Butadiene"	74	50	22	29	30	47	78	39	26															
Carbon Tetrachloride	< .01	0.93	< .01	< .01	0	< .01	< .01	< .01	< .01															
Chromium (Hexavalent)	0.01	< .01	< .01	< .01	< .01	0.01	0.02	0.02	< .01															
para-DiChlorobenzene	61	40	11	5	33	30	71	12	17															
Formaldehyde	816	528	126	99	315	374	682	333	214															
Methylene Chloride	216	123	33	17	106	103	265	35	65															
Perchloroethylene	169	88	33	14	88	85	172	24	37															
Diesel PM	1584	713	121	111	537	337	863	181	249