THE DIRTY HALF-DOZEN

Following is a list of the six most severe air pollution penalties assessed by the South Coast Air Quality Management District in January. Company: Blair Paving Inc., Anaheim Penalty: $25,000 Violation: Operating a batch concrete plant and emitting visible cement dust at the U.S. Marine Corps Air Station in El Toro. Company: Micrometals Inc., Anaheim Penalty: $5,500 Violation: Failure to maintain logs on paint usage and emitting excess hydrocarbon emissions. Company: Ericson Yachts, Irvine Penalty: $3,600 Violation: Excess hydrocarbon emissions. Company: Crown Cleaners, Costa Mesa Penalty: $1,500 Violation: Excess hydrocarbon emissions due to improper storage of dry-cleaning fluid. Company: Shell Western E&P; Co., Huntington Beach Penalty: $1,400 Violation: Improper maintenance of two crude oil tanks at oil well field. Company: Westline Manufacturing, Fullerton Penalty: $1,200 Violation: Operating paint spray booths without a permit. Source: South Coast Air Quality Management District