2003 Almanac (page 449)  Table C-11  County Emissions (tons/year) for Ten Toxic Air Contaminants by Air Basin	
San Diego Air Basin	

TAC	San Diego
Acetaldehyde	526
Benzene	947
"1,3-Butadiene"	224
Carbon Tetrachloride	0.09
Chromium (Hexavalent)	0.29
para-Dichlorobenzene	154
Formaldehyde	1362
Methylene Chloride	393
Perchloroethylene	624
Diesel PM	1800