Centralia pot lab may be the first in Washington to lose its license State officials are investigating suspicious test results, with a focus on the lab’s numbers measuring the potency of marijuana. By John Stang, Crosscut Share: Cannabis flower at Botanica Seattle's headquarters and production facility in Seattle, Washington on Monday, March 12, 2017. (Matt Mills McKnight/Cascade Public Media) Data analyst Keegan Skeate agonized for more than a year about telling the state about some suspicious test results at a marijuana testing lab. In a converted 107-year-old former bank building in Centralia’s quaint downtown, Praxis Laboratory tested pot from growers across the state. Small samples of marijuana flowers would arrive in baggies. Maybe 4 grams or so from every few square feet of leafy canopy.