DOE - Cannabis Science Task Force Steering Committee (May 18, 2020) - Proficiency Testing Work Group - Report #5 Washington State Department of Ecology (DOE) Source https://www.ezview.wa.gov/...Documents/CannabisSTF/200512%20Meeting%20Report.pdf Published: Monday May 18, 2020 11:14 AM Replications Cannabis Observer Information Set Membership DOE - Cannabis Science Task Force Steering Committee (May 18, 2020) - Information Set