ABSOLUTE METRIC TONS (IN THOUSANDS)  Waste-to-Landfill 369,268 321,180 290,936 343,492  Recycled Internally (on-site) 315,349 275,068 246,446 264,951  Recycled Externally (off-site) 201,070 203,787 192,810 227,715  Recycled Internally with External Processing 18,182 42,204 54,224 51,921  Recultivation 7,841 13,836 27,163 15,854  Incinerated with Energy Recovery 4,531 4,284 7,035 8,506  Treated and Recycled 1,600 2,118 1,808 2,879  Incinerated without Energy Recovery 725 186 506 907  Controlled Confinement* 549 200 137 186  Cross-Plant Recycle 1,116 1,089 93 -  Composting 72 73 24 18  Return to Supplier 14 2 2 2 GRAND TOTAL 920,316 864,027 821,182 916,431 Non-Hazardous Waste by Disposal Method (Metric Tons) 1000 800 600 400 200 2018 2019 2020 2021 ENVIRONMENTAL DATA WASTE DATA Appendix C 2021 Owens Corning Sustainability Report | Appendices | 324 * Owens Corning considers Controlled Confinement as Waste-to-Landfill for reporting purposes.