2002 Almanac (page 225) Table 5-9 2001 Top Ten Counties: Carbon Tetrachloride Carbon Tetrachloride County Air Basin tons/year Percent Los Angeles South Coast 1.83 50% Contra Costa San Francisco Bay Area 1.46 40% Orange South Coast 0.08 2% Santa Barbara South Central Coast 0.07 2% Sacramento Sacramento Valley 0.06 2% Alameda San Francisco Bay Area 0.03 1% Riverside South Coast 0.02 <1% Ventura South Central Coast 0.02 <1% Sonoma San Francisco Bay Area 0.02 <1% Kern Mojave Desert 0.02 <1%