California Air Resources Board 2007 Almanac (web)																
Appendix C	North Coast		Table C_7													
TAC	Del Norte	Humboldt	Mendocino	Sonoma	Trinity											
Acetaldehyde	20	92	79	30	24											
Benzene	13	77	64	41	25											
"1,3-Butadiene"	31	77	16	9	87											
Carbon Tetrachloride	0	0	0	0	0											
Chromium (Hexavalent)	< .01	< .01	0.01	< .01	< .01											
para-DiChlorobenzene	1	5	4	2	< 1											
Formaldehyde	31	155	138	62	43											
Methylene Chloride	4	18	13	13	2											
Perchloroethylene	4	18	14	9	2											
Diesel PM	18	187	183	78	37