TAC	Amador	Calaveras	El Dorado (part)	Mariposa	Nevada	Placer (part)	Plumas	Sierra	Tuolumne
Acetaldehyde	45	56	106	30	129	20	112	20	87
Benzene	136	195	271	107	240	53	431	100	323
"1,3-Butadiene"	32	41	54	19	48	11	107	23	69
Carbon tetrachloride	0	0	0	0	0	0	0	0	0
Chromium (Hexavalent)	0.0018	0.003	0.0029	0.0027	0.0025	0.0006	0.0007	0.0009	0.0015
para-Dichlorobenzene	2	2	6	< 1	4	1	< 1	< 1	3
Formaldehyde	108	139	230	74	246	46	317	64	234
Methylene Chloride	4	5	14	2	20	6	2	< 1	8
Perchloroethylene	20	25	64	9	20	18	12	2	31
Diesel PM	35	43	67	19	74	25	50	4	57