California Air Resources Board 2004 Almanac (web) Table C-2 Appendix C County Emissions for Ten Toxic Air Contaminants - Lake County Air Basin TAC Lake Acetaldehyde 40 Benzene 79 "1,3-Butadiene" 19 Carbon Tetrachloride 0.00 Chromium (Hexavalent) < .01 para-DiChlorobenzene 3 Formaldehyde 92 Methylene Chloride 8 Perchloroethylene 13 Diesel PM 51