https://www.ifsqn.com/forum/index.php/calendar/event/139-an-approach-to-validating-allergen-cleaning-procedures/food-safety-live-2014?forceDownload=1&_k=880ea6a14ea49e853634fbdc5015a024&forceDownload=1&_k=880ea6a14ea49e853634fbdc5015a024