California Air Resources Board 2007 Almanac (web) Appendix C Lake County Table C_2 TAC Lake Acetaldehyde 49 Benzene 82 "1,3-Butadiene" 65 Carbon Tetrachloride 0 Chromium (Hexavalent) < .01 para-DiChlorobenzene 3 Formaldehyde 101 Methylene Chloride 8 Perchloroethylene 9 Diesel PM 51