TNO has tested control measures for drilling in sand lime blocks and concrete.
The hazardous substance management plan is as follows (in order of effectiveness):
Step 1: Choose quartz-Free / quartz-poor building materials.
Step 2: Choose to build PREFAB.
Step 3: Choose dust-free processes an tools.
TNO has tested one dust-free process for drilling. The test specifications are a space volume of 15 m3, ventilation of 150 m3/h and 100% power-on time of the tool.
The concentration of substance is measured in the employee's respiratory zone.
Excess factor: 70-90 times limit respiratory quartz
Prevention factor (PF): 100 – 140.
Concentration of quartz quartz at workplace below limit value (0.075 mg / m³).