In this case, the client needed contamination control in the passage of operators from offices to production (and vice versa), all on a raised paneled floor. It was, therefore, necessary to ensure possible access under the panels for inspections to utilities passing under the floor. For this purpose, three zones, the most critical, were identified where the CZ washable decontamination mat was to be installed for 20sqm over a total area of about 50sqm. The three zones cover the passage to men’s utilities, access from outside and women’s utilities, and access to offices.