CLIPBOARD : 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 November, the most recent period for which information is available..

Company: Yamaha Motor Corp., 6555 Katella Ave., Cypress

Penalty: $50,000

Violation: Failure to file a trip reduction plan (motorcycle distributor).

Company: Prototype Concepts Inc., 1945 C-1 Placentia, Costa Mesa

Penalty: $21,503

Violation: Violated public nuisance laws by emitting glass fibers into the atmosphere. Installed a self-contained emissions control booth not required by AQMD rules, but will immediately halt emissions (fiberglass fabricator).

Company: Houshang Tabrizi, Union dealer, 3000 S. Bristol and 5201 W. First St., Santa Ana

Penalty: $7,500

Violation: Failure to maintain gasoline dispensing equipment and operating without a permit (service stations).

Company: Custom Enclosures Inc., 1341 N. Blue Gum St., Anaheim

Penalty: $5,000

Violation: Dust emissions and improper use of coating and solvent materials (wood cabinet manufacturer).

Company: Silicon Systems Inc., 14351 Myford Rd., Tustin

Penalty: $1,500

Violation: Improper use of solvents (circuit manufacturer).

Company: Cal Comp Inc., 2411 W. La Palma Ave., Anaheim

Penalty: $1,000

Violation: Improper use of solvents (aerospace subsidiary).

Source: South Coast Air Quality Management District