Chapter 5 San Francisco Bay Area Table 5-39 San Francisco Bay Area - Formaldehyde Emissions Source tons/year Percent Air Basin Percent State Stationary Sources 175 5% 1% Area-wide Sources 360 11% 2% On-Road Mobile 1050 32% 5% Gasoline Vehicles 688 21% 3% Diesel Vehicles 362 11% 2% Other Mobile 1728 52% 9% Gasoline Fuel 425 13% 2% Diesel Fuel 813 25% 4% Other Fuel 490 15% 2% Natural Sources 0 0% 0% Total 3313 100% 16% Total Statewide 20251