2002 Almanac (page 277)  Table 5-57  2001 Emission Inventory by Compound			

"San Diego Air Basin - 1,3-Butadiene"			
Emissions Source	tons/year	Percent Air Basin	Percent State
Stationary Sources	<1	0%	<1%
Area-wide Sources	4	1%	<1%
On-Road Mobile	162	61%	4%
   Gasoline Vehicles	160	61%	4%
   Diesel Vehicles	2	1%	<1%
Other Mobile	89	34%	2%
Natural Sources	8	3%	0%
Total	264	100%	7%
Total Statewide	3678