BATH — Maine environmental regulators have fined Bath Iron Works $12,220 for violating hazardous waste standards during a December inspection.

Among other things, the shipbuilders failed to keep containers closed, failed to label or mark containers, and allowed materials to accumulate for more than 90 days. The problems were uncovered during a regularly scheduled inspection in December.

Shipyard spokesman Jim DeMartini told the Times Record that the “vast majority of items” were resolved within 24 hours. He says new steps are in place to ensure the violations don’t happen again.