AUSTIN -

A Freeport chemical recycling and processing company has agreed to pay a $7.5 million fine for failing to comply with state environmental laws.

Texas Attorney General Greg Abbott announced Wednesday that the fine against Gulf Chemical & Metallurgical Corp. is one of the largest Texas Clean Air Act penalties in state history.

The company was cited for problems at its facility in the City of Freeport.

Investigators with the Texas Commission on Environmental Quality found the facility emitted air pollutants such as ammonia, nitrous oxides, sulfur dioxide and various airborne metals. State investigators also discovered the company unlawfully discharged wastewater that contained toxic and hazardous metals, including arsenic, cobalt and nickel.

Freeport-based Gulf Chemical recycles spent petroleum catalysts used in oil refining.