In this case, the client required a solution for contamination control in the internal accesses and passages between different clean rooms. Therefore, it was decided to place the CZ washable decontamination mat (https://www.acsupply.it/en/products/cleanroom/item-483 ) right and only in the internal corridors where all operators indiscriminately would have to pass. This soluzone thus allows for more focused, concentrated and easy maintenance without hindering operations inside the clean rooms.