California Air Resources Board 2004 Almanac (web)			
Chapter 5	Top Ten Counties - Benzene Emissions		Table 5-5
Benzene			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	2588	19%
San Diego	San Diego	966	7%
Orange	South Coast	917	7%
Santa Clara	San Francisco Bay Area	539	4%
Kern	San Joaquin Valley	527	4%
Alameda	San Francisco Bay Area	432	3%
San Bernardino	South Coast	431	3%
Riverside	South Coast	417	3%
Sacramento	Sacramento Valley	378	3%
Contra Costa	San Francisco Bay Area	351	3%