2021 Owens Corning Sustainability Report | Reducing Our Environmental Footprint | Waste Management | 186 Photo submitted by: Kelly Picking | Toledo, Ohio, U.S. Hazardous Waste Owens Corning facilities generate small amounts of hazardous waste during production and maintenance operations. This typically includes spent cleaning solvents, paint-related wastes, and spent laboratory chemicals. There are also some business-specific hazardous wastes. For example, Owens Corning’s Roofing business uses flammable ink to mark shingle wrappers, so any unused ink or ink conditioner contributes a small amount to the total hazardous waste disposed. Each location has an appropriate hazardous waste management system to ensure the proper and safe disposal of waste. In 2021, we generated 4,524 metric tons of hazardous waste, which is only 0.5% of the total waste generated. A total of 2,193 metric tons of hazardous waste was sent to landfill, which includes waste disposed of through controlled confinement. Our business units have established a mechanism to track the intensity and amount of hazardous waste generated. The increases in hazardous waste over the years are correlated with the furnace rebuild cycles for our glass manufacturing locations. We continue to seek ways to reduce all waste, including hazardous waste. During the reporting period, no hazardous wastes, as classified under the terms of the Basel convention, were imported, exported, transported, treated, or shipped internationally for disposal.