The fine dust control and decontamination of access to the area of production and assembly of large-scale mechanical parts was an inevitable step after a costly restoration of the entire production area by diamond sanding. The customer has reviewed internal flow and access flows from outside of both material and operators, thus detecting the critical areas where to install contamination control mats that thus minimized the handling of fine dust as well as optimizing internal flows and coming from outside the plant. As shown in the photos, every blue decontaminant mat is clearly visible by helping the operator in his passive cleaning process within the department without at any time impeding him in any way in transit, whatever direction taken .