California Air Resources Board 2008 Almanac (web)							
Appendix E	"Placer County, Mountain Counties Air Basin"						Table E-21
Category	ROG	CO	NOX	SOX	PM10	PM2.5	NH3
Natural Sources Total	28	34	1	0	3	3	0
Biogenic Sources	26	0	0	0	0	0	0
Geogenic Sources	0	0	0	0	0	0	0
Wildfires	2	34	1	0	3	3	0