The Department of Environmental Quality proposed to amend Chapters 301, 302, and 307, concerning laboratory accreditation, to update incorporations by reference for EPA methodologies, and to make other amendments for conformity with the updated incorporations by reference. Updates include the most recent EPA Primary Drinking Water Regulations, National Standards for Solid Waste Test Methods, and EPA Test Procedures for the Analysis of Pollutants. A hearing will be held January 11, 2022. Comments are due January 10, 2022. See http://www.oar.state.ok.us/oar/codedoc02.nsf/frmMain?OpenFrameSet&Frame=Main&Src=_75tnm2shfcdnm8pb4dthj0chedppmcbq8dtmmak31ctijujrgcln50ob7ckj42tbkdt374obdcli00_.