California Air Resources Board 2006 Almanac (web) Appendix C Lake County Table C_2 TAC Lake Acetaldehyde 43 Benzene 72 "1,3-Butadiene" 16 Carbon Tetrachloride 0 Chromium (Hexavalent) < .01 para-DiChlorobenzene 4 Formaldehyde 84 Methylene Chloride 8 Perchloroethylene 13 Diesel PM 49