California Air Resources Board 2006 Almanac (web) Appendix C Great Basin Valleys Table C_1 TAC Alpine Inyo Mono Acetaldehyde 9 16 36 Benzene 25 15 56 "1,3-Butadiene" 6 4 14 Carbon Tetrachloride 0 0 0 Chromium (Hexavalent) < .01 < .01 0.02 para-DiChlorobenzene < 1 1 < 1 Formaldehyde 24 27 72 Methylene Chloride < 1 2 1 Perchloroethylene < 1 4 4 Diesel PM 0 17 12