 During operation , fully cooked meat or cheese logs arrive sealed in impermeable casings . The logs go through a casing sanitation step that involves being treated with a sanitizing liquid before the casings are removed from the logs . The logs then undergo a post @-@ lethality treatment by passing through an infrared pasteurization tunnel to kill pathogens on the logs . The logs are then mechanically transferred to slicers , sliced , and placed in sealed packages that are transferred out of the processing cell . The mechanical transfers decrease the risk of product contamination by reducing handling of product by personnel . 
