06/18/2026
Footwear contamination is easy to underestimate because it rarely shows up as one big failure.
It happens through repeated transfer. Contamination gets picked up in one area, carried across a boundary, and released somewhere else. Then that cycle repeats all day long.
What starts on the sole of a boot can become contamination on traffic paths, wheel routes, hoses, nearby equipment, and eventually areas much closer to exposed product.
Transition zones are where that movement is supposed to be interrupted. If the interruption is weak or inconsistent, the contamination keeps moving.