California Air Resources Board 2007 Almanac (web) Chapter 5 - Table 5-2 2006 Statewide TAC Emissions TAC tons/year Acetaldehyde "10,023" Benzene "12,060" "1,3-Butadiene" "3,589" Carbon Tetrachloride 2 "Chromium, Hexavalent" 1 para-Dichlorobenzene "1,469" Formaldehyde "23,154" Methylene Chloride "6,527" Perchloroethylene "4,865" Diesel PM "42,326"