2009 PM2.5 Secondary	"Table 2-17, Page 2-31"
Estimated Secondary Portion of PM2.5 (annual average)	
Air Basin	Secondary PM2.5 (%)
Great Basin Valleys	30
Lake County	20
Lake Tahoe	20
Mojave Desert	30
Mountain Counties	10
North Central Coast	30
North Coast	20
Northeast Plateau	20
Sacramento Valley	30
Salton Sea	30
San Diego	50
San Francisco Bay Area	40
San Joaquin Valley	50
South Central Coast	50
South Coast	60