DOE - Cannabis Science Task Force Steering Committee (May 18, 2020) - Proficiency Testing Work Group - Presentation Washington State Department of Ecology (DOE) Source https://www.ezview.wa.gov/...ments/CannabisSTF/May%20PT%20Workgroup%20update.pdf Published: Monday May 18, 2020 10:59 PM Replications Cannabis Observer Information Set Membership DOE - Cannabis Science Task Force Steering Committee (May 18, 2020) - Information Set