California Air Resources Board 2006 Almanac (web)							
Appendix E	"Modoc County, Northeast Plateau Air Basin"						Table E-37
Category	ROG	CO	NOX	SOX	PM10	PM2.5	NH3
Natural Sources Total	57	52	2	1	5	5	2
Biogenic Sources	54	0	0	0	0	0	0
Geogenic Sources	0	0	0	0	0	0	1
Wildfires	3	52	2	1	5	5	1