Published 1 min ago | By Joey Peña (Click on the orange arrows to advance the slideshow.) (This story also appears in the July issue of Marijuana Business Magazine.) In this slideshow, take a peek into how a Colorado marijuana testing facility identifies yeast and mold in commercial cannabis products. Step 1: Prepare a biosafety cabinet Rm3 Labs, based in Boulder, Colorado, prepares a NuAire biosafety cabinet for biocontaminant testing.