"2002 Almanac (page 221)  Table 5-7  2001 Top Ten Counties:  1,3-Butadiene"			

"1,3-Butadiene"			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	630	17%
San Diego	San Diego	264	7%
Orange	South Coast	192	5%
Santa Clara	San Francisco Bay Area	127	3%
Tulare	San Joaquin Valley	116	3%
San Bernardino	South Coast	114	3%
Kern	San Joaquin Valley	104	3%
Alameda	San Francisco Bay Area	102	3%
Sacramento	Sacramento Valley	100	3%
Riverside	South Coast	100	3%