California Air Resources Board 2004 Almanac (web) Table 5-37 Chapter 5 San Francisco Bay Area Hexavalent Chromium Emissions San Francisco Bay Area - Chromium (Hexavalent) Emissions Source tons/year Percent Air Basin Percent State Stationary Sources < .01 4% 0% Area-wide Sources 0.00 0% 0% On-Road Mobile 0.02 21% 1% Gasoline Vehicles 0.02 21% 1% Diesel Vehicles < .01 1% 0% Other Mobile 0.08 75% 5% Natural Sources 0.00 0% 0% Total 0.11 100% 6% Total Statewide 1.71