California Air Resources Board 2008 Almanac (web) Chapter 5 San Diego Table 5-60 San Diego - Chromium (Hexavalent) Emissions Source tons/year Percent Air Basin Percent State Stationary Sources 0.04 19% 4% Area-wide Sources < .01 0% 0% On-Road Mobile 0.02 7% 1% Gasoline Vehicles 0.02 7% 1% Diesel Vehicles < .01 0% 0% Other Mobile 0.17 73% 14% Gasoline Fuel < .01 0% 0% Diesel Fuel < .01 0% 0% Other Fuel 0.17 73% 14% Natural Sources 0 0% 0% Total 0.23 100% 20% Total Statewide 1.17