California Air Resources Board 2009 Almanac (web) Chapter 5 Sacramento Valley Table 5-73 Sacramento Valley - Formaldehyde Emissions Source tons/year Percent Air Basin Percent State Stationary Sources 177 9% 1% Area-wide Sources 343 17% 2% On-Road Mobile 578 28% 3% Gasoline Vehicles 208 10% 1% Diesel Vehicles 371 18% 2% Other Mobile 947 46% 5% Gasoline Fuel 226 11% 1% Diesel Fuel 578 28% 3% Other Fuel 143 7% 1% Natural Sources 0 0% 0% Total 2045 100% 10% Total Statewide 20951