California Air Resources Board 2006 Almanac (web) Chapter 5 San Diego Table 5-59 San Diego - Chromium (Hexavalent) Emissions Source tons/year Percent Air Basin Percent State Stationary Sources 0.04 17% 3% Area-wide Sources < .01 1% 0% On-Road Mobile 0.01 6% 1% Gasoline Vehicles 0.01 6% 1% Diesel Vehicles < .01 0% 0% Other Mobile 0.18 77% 12% Gasoline Fuel 0.01 5% 1% Diesel Fuel < .01 0% 0% Other Fuel 0.17 71% 11% Natural Sources 0 0% 0% Total 0.24 100% 16% Total Statewide 1.52