Appendix C Northeast Plateau Table C_8 TAC Lassen Modoc Siskiyou Acetaldehyde 52 23 97 Benzene 39 8 55 "1,3-Butadiene" 35 25 110 Carbon Tetrachloride 0 0 0 Chromium (Hexavalent) < .01 < .01 < .01 para-DiChlorobenzene 2 < 1 2 Formaldehyde 85 39 161 Methylene Chloride 3 < 1 5 Perchloroethylene 5 1 6 Diesel PM 51 42 211