California Air Resources Board 2009 Almanac (web)			
Chapter 5	San Joaquin Valley		Table 5-47
"San Joaquin Valley - 1,3-Butadiene"			
Emissions Source	tons/year	Percent Air Basin	Percent State
Stationary Sources	3	1%	0%
Area-wide Sources	137	27%	4%
On-Road Mobile	116	23%	3%
   Gasoline Vehicles	101	20%	3%
   Diesel Vehicles	14	3%	0%
Other Mobile	128	25%	3%
   Gasoline Fuel	64	12%	2%
   Diesel Fuel	14	3%	0%
   Other Fuel	50	10%	1%
Natural Sources	131	25%	3%
Total	515	100%	14%
Total Statewide	3754