ClO2 gas sampling port Measurement 1 2 3 4 5 First 1.1 1.3 1.1 1.2 1.1 Second 1.2 1.2 1.1 1.2 1 Third 1.2 1.2 1.2 1.2 1.1

Table 1: ClO2 gas concentration at various locations in the ClO2-exposure chamber. ClO2 gas was measured 1 hour after the commencement of gas exposure at various locations (sampling ports) in the exposure chamber as indicated in figure 1. Each value represents gas concentration in ppm (v/v) of a single measurement.