California Air Resources Board 2008 Almanac (web) Chapter 5 San Francisco Bay Area Table 5-40 San Francisco Bay Area - Formaldehyde Emissions Source tons/year Percent Air Basin Percent State Stationary Sources 175 5% 1% Area-wide Sources 384 11% 2% On-Road Mobile 913 26% 4% Gasoline Vehicles 543 16% 2% Diesel Vehicles 369 11% 2% Other Mobile 2016 58% 9% Gasoline Fuel 344 10% 1% Diesel Fuel 1219 35% 5% Other Fuel 453 13% 2% Natural Sources 0 0% 0% Total 3488 100% 15% Total Statewide 23154