California Air Resources Board 2006 Almanac (web)			
Chapter 5	Sacramento Valley		Table 5-68
"Sacramento Valley - 1,3-Butadiene"			
Emissions Source	tons/year	Percent Air Basin	Percent State
Stationary Sources	< 1	0%	0%
Area-wide Sources	42	17%	2%
On-Road Mobile	95	38%	3%
   Gasoline Vehicles	93	38%	3%
   Diesel Vehicles	2	1%	0%
Other Mobile	109	44%	4%
   Gasoline Fuel	82	33%	3%
   Diesel Fuel	6	2%	0%
   Other Fuel	22	9%	1%
Natural Sources	0	0%	0%
Total	247	100%	9%
Total Statewide	2778