Appendix C Great Basin Valleys Table C_1 TAC Alpine Inyo Mono Acetaldehyde 7 15 32 Benzene 25 16 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 73 Methylene Chloride < 1 2 1 Perchloroethylene < 1 4 3 Diesel PM 0 18 13