2002 Almanac (page 445)  Table C-11  County Emissions (tons/year) for Ten Toxic Air Contaminants by Air Basin	
San Diego Air Basin	

TAC	San Diego
Acetaldehyde	567
Benzene	1471
"1,3-Butadiene"	264
Carbon Tetrachloride	< .01
Chromium (Hexavalent)	0.22
para-Dichlorobenzene	150
Formaldehyde	1542
Methylene Chloride	378
Perchloroethylene	1668
Diesel PM	1693