California Air Resources Board 2007 Almanac (web) Appendix C Great Basin Valleys Table C_1 TAC Alpine Inyo Mono Acetaldehyde 4 28 28 Benzene 6 39 15 "1,3-Butadiene" 1 10 6 Carbon Tetrachloride 0 0 0 Chromium (Hexavalent) < .01 < .01 < .01 para-DiChlorobenzene < 1 < 1 < 1 Formaldehyde 9 57 43 Methylene Chloride < 1 2 1 Perchloroethylene < 1 2 2 Diesel PM 6 51 36