California Air Resources Board 2007 Almanac (web) Chapter 5 Sacramento Valley Table 5-73 Sacramento Valley - Formaldehyde Emissions Source tons/year Percent Air Basin Percent State Stationary Sources 179 8% 1% Area-wide Sources 341 16% 1% On-Road Mobile 645 29% 3% Gasoline Vehicles 243 11% 1% Diesel Vehicles 402 18% 2% Other Mobile 1027 47% 4% Gasoline Fuel 243 11% 1% Diesel Fuel 640 29% 3% Other Fuel 144 7% 1% Natural Sources 0 0% 0% Total 2193 100% 9% Total Statewide 23154