2002 Almanac (page 442) Table C-5 County Emissions (tons/year) for Ten Toxic Air Contaminants by Air Basin Mountain Counties Air Basin TAC Amador Calaveras El Dorado* Mariposa Nevada Placer* Plumas Sierra Tuolumne Acetaldehyde 35 48 84 26 112 17 68 12 62 Benzene 68 102 124 55 118 27 159 40 129 "1,3-Butadiene" 18 27 23 12 24 6 47 12 29 Carbon Tetrachloride 0 0 0 0 0 0 0 0 0 Chromium (Hexavalent) < .01 < .01 < .01 < .01 < .01 < .01 < .01 < .01 < .01 para-Dichlorobenzene 2 2 7 < 1 5 1 1 < 1 3 Formaldehyde 75 109 153 61 186 33 177 39 146 Methylene Chloride 5 5 16 2 20 6 3 < 1 9 Perchloroethylene 20 27 68 10 22 19 12 2 33 Diesel PM 32 39 56 16 66 24 47 3 52 This Air Basin includes only a portion of this county.