I have been tasked with creating a Drain Testing SOP for my site. Background: we are a dietary supplement distributor (do finished product packing), there are two drains that are not critical (one in a supply closet the other outside an office door that leads to the warehouse). I have the cleaning procedure semi-completed (add 1/4 c of bleach + 12 1/4 c of water to pout down each drain). What I need help with is testing parameters that should be met is I focus on listeria, e.coli and salmonella. Frequency of testing I'm pushing for is 2x year.
Any help would be most appreciated!