Residual Solvents in Colorado under new testing rules and Good Manufacturing Practices March 12, 2018 Seth Wong Science and Technology 0 Comments By Seth Wong and JJ Slatkin On February 1, 2018, the State of Colorado, Marijuana Enforcement Division implemented new residual solvent testing requirements for concentrate manufacturers. The new rules included lower permissible values (thresholds) for existing analytes like Butane and… Read More→