For 14 years, Dean May, who co-owns Calgary-based Mayken Hazmat Solutions, has been cleaning the mess left behind by drug labs in Western Canada after police are done with the scene.

As clandestine drug labs become larger and more complex, so does the toxic mess they leave behind and the tools required to clean them up, creating expensive and dangerous situations for both people and the environment.

In B.C., the RCMP say they've spent millions over the last five years disposing of chemicals found…