Fig. 11

Laser particle counter (LPC) recordings for modest HDM target exposure session. The LPC recorded particles of sizes 2.5 µm, 5.0 µm, 10.0 µm, 15.0 µm, 20.0 µm, and 25.0 µm for the duration of the 3-h exposure. Particles measuring 2.5 µm averaged 108.5 particles