California Air Resources Board 2006 Almanac (web)																									
Appendix C	North Coast		Table C_7																						
TAC	Del Norte	Humboldt	Mendocino	Sonoma	Trinity																				
Acetaldehyde	19	90	71	53	21																				
Benzene	13	82	64	69	27																				
"1,3-Butadiene"	16	22	13	13	13																				
Carbon Tetrachloride	0	0	0	0	0																				
Chromium (Hexavalent)	< .01	< .01	0.02	0.04	< .01																				
para-DiChlorobenzene	2	8	6	4	< 1																				
Formaldehyde	29	151	121	113	37																				
Methylene Chloride	4	18	14	13	2																				
Perchloroethylene	6	29	21	15	3																				
Diesel PM	19	196	141	239	11