Table 4.

Ozone concentration during application of the plasma comb measured in three different distances.

Nozzle Distance	Median O3 Conc./ppb	OSHA Multiple	COSHH Multiple
0 cm	5729.35	≈17.6×	≈26.4×
1 cm	335.35	≈2.25×	≈3.4×
10 cm	127.7	≈0.59×	≈0.89×