2002 Almanac (page 261)  Table 5-35  2001 Emission Inventory by Compound			

"San Francisco Bay Area Air Basin - 1,3-Butadiene"			
Emissions Source	tons/year	Percent Air Basin	Percent State
Stationary Sources	6	1%	0%
Area-wide Sources	1	0%	0%
On-Road Mobile	368	64%	10%
   Gasoline Vehicles	364	63%	10%
   Diesel Vehicles	4	1%	0%
Other Mobile	198	34%	5%
Natural Sources	1	0%	0%
Total	575	100%	16%
Total Statewide	3678