California Air Resources Board 2004 Almanac (web) Table C-3 Appendix C County Emissions for Ten Toxic Air Contaminants - Lake Tahoe Air Basin TAC El Dorado Placer Acetaldehyde 38 18 Benzene 37 13 "1,3-Butadiene" 10 3 Carbon Tetrachloride 0.00 0.00 Chromium (Hexavalent) 0.01 0.00 para-DiChlorobenzene 2 1 Formaldehyde 76 28 Methylene Chloride 5 4 Perchloroethylene 6 2 Diesel PM 31 5