To my knowledge, and I will confess that I am not a regulatory expert, there has always been a policy from Health Canada that reflects an environmental monitoring program as being best practice, but it was never transitioned into a regulation that required the implementation of that policy. So to the best of my knowledge, and I certainly stand to be corrected, I don't know of there ever being a regulatory requirement for a listeria monitoring program in place inside the food facility, unless I'm misinformed on that.
