Missoula, Montana — The Roseburg Forest Products plant in Missoula emits hundreds of tons of pollutants into the air every year, including carbon monoxide, ammonia, sulfur dioxide, particulate matter and volatile organic compounds, according to records from the Montana Department of Environmental Quality. The large factory on Missoula’s Northside near Interstate 90, which makes particleboard, was built in 1969. Roseburg Forest Products, based in Oregon, purchased the plant from Louisiana-Pacific in 2003. The plant employs about 150 workers. Earlier this spring, Roseburg Forest Products announced that the facility is closing for good in late May due to Roseburg’s decision to exit the particleboard manufacturing business and focus on other products. All the workers will lose their jobs and there has been no indication that the plant will be sold to a new operator. The Missoulian requested and received the emissions reports from 2022 and 2023 from the Montana DEQ for the Roseburg facility in Missoula.