Hawaiian Commercial & Sugar Company was fined $600,000 by the state for violating air quality regulations.

The state Department of Health said that the excess emission and reporting violations occurred from 2009 to 2014 in Puunene, Maui.

More than 400 violations “including issues such as boiler operations and delayed notifications” were documented by the DOH.

“With the impending end of the last sugarcane commercial operations in Hawaii, the department is working to bring closure to a number of complex and long-standing regulatory issues that have involved extended legal negotiations with HC&S,” Keith Kawaoka, deputy director of Environmental Health, said in a press release Thursday.

A copy of the consent order and other related documents can be accessed here.

HC&S is a subsidiary of Alexander & Baldwin.