Odour Threshold Investigation 2012 - Bay of Plenty Regional Council

Figure 7.10 Graphical summary of the “session mean” unconditioned data. 41
Figure 7.11 Log 10 mean session data for the entire group and locations. 42
Figure 7.12
t-test results (with box plots) for a range of averaging levels and
locations. 44
Figure 7.13 H 2 S threshold range per session, all panellists. 44
Figure 7.14 Trends per panellist per session (blue – Rotorua, red – Whakatāne). 45
Figure 7.15 Trends per panellist by comparing first and last round results. 46
Figure 7.16 Frequency plots - percentage of data points in relation to 7 µg/m 3 . 48
Figure 7.16 Distribution patterns for n-Butanol. 50
Figure 7.17 Scatterplot showing n-butanol and H 2 S relationship. 50
Figure 8.1 Updated H 2 S threshold summary graph (adapted from Figure 5.1). 54
Figure 1 (Data for this plot excludes Rotorua data with elevated ambient H 2 S). 62
Figure 2 “affected” panellists have at least one result in the “suspect” period. 63
Figure 3 Effects by panellist. 64
Figure 6 Between session trends in log scale. 66
Figure 7 Distribution of Whakatāne thresholds. 67
vi Environmental Publication 2012/06–A review of odour properties of H 2 S odour threshold investigation 2012