California Air Resources Board 2007 Almanac (web)							
Appendix E	"Placer County, Lake Tahoe Air Basin"						Table E-9
Category	ROG	CO	NOX	SOX	PM10	PM2.5	NH3
Natural Sources Total	1	0	0	0	0	0	0
Biogenic Sources	1	0	0	0	0	0	0
Geogenic Sources	0	0	0	0	0	0	0
Wildfires	0	0	0	0	0	0	0