DOE - Cannabis Science Task Force Steering Committee (November 20, 2020) - Proficiency Testing Work Group - Presentation Washington State Department of Ecology (DOE) Source https://www.ezview.wa.gov/...ents/CannabisSTF/20201120%20Presentation%20PTWG.pdf Published: Tuesday November 24, 2020 3:19 PM Replications Cannabis Observer Information Set Membership DOE - Cannabis Science Task Force Steering Committee (November 20, 2020) - Information Set