Article R4412-155 of the French Labour Code
In the formula set out in article R. 4412-154, the following definitions apply: 1° Cns, the concentration of non-silicogenic respirable dust in mg/m³, which corresponds to the difference between the total concentration of respirable dust and the sum of the concentrations corresponding to crystalline silica; 2° (Repealed); 3° Cq, the concentration of quartz in mg/m³; 4° Cc, the concentration of cristobalite in mg/m³; 5° Ct, the concentration of tridymite in…