Odour Threshold Investigation 2012 - Bay of Plenty Regional Council

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Whakatane statistic estimate (µg/m^3) confidence interval Mean 1.02 (.59, 1.77) Median 0.53 (.39, .73) % detecting 2 µg/m^3 89% (77%, 96%) % detecting 7 µg/m^3 99% (94%, 100%) Rotorua statistic estimate (µg/m^3) confidence interval Mean 1.85 (1.35, 2.54) Median 1.4 (.72, 3.44) % detecting 2 µg/m^3 69% (54%, 81%) % detecting 7 µg/m^3 98% (90%, 100%) Location effects on butanol threshold Analysis of the butanol data using similar methods to those used above showed that the location difference in geometric means was not statistically significant. However the variation in the Rotorua data was significantly greater than that for Whakatane. The t-test results for log e (butanol threshold) were as follows: Two-sample T for lnMnbut Location N Mean StDev SE Mean Median Est Geometric Mean Rotorua 29 0.159 0.291 0.054 238 281.5 Whakatāne 30 -0.208 0.362 0.066 237 221.2 Difference = mu (Rotorua) - mu (Whakatāne). Estimate for difference: 0.244. 95% CI for difference: (-0.218, 0.707). T-Test of difference = 0 (vs not =): T-Value = 1.07 P-Value = 0.291 DF = 36. 68 Environmental Publication 2012/06–A review of odour properties of H 2 S Odour Threshold Investigation 2012
Histogram of Mn butanol Lognormal Rotorua 24 18 Rotorua Loc 5.643 Scale 1.109 N 28 Frequency 24 Whakatāne 12 6 0 Whakatāne Loc 5.399 Scale 0.4928 N 30 18 12 6 0 0 600 1200 1800 Mnbut 2400 3000 3600 Panel variable: location Project: TESTSUMMARY.MPJ; Worksheet: panelstrim; 10/08/2012; R.Littler Environmental Publication 2012/06–A review of odour properties of H 2 S Odour Threshold Investigation 2012 69
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A review of odour properties of H 2
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Acknowledgements Dr Bruce Graham fo
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In relation to the second question
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6.5 Equipment 29 6.6 Requirements o
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Figure 7.10 Graphical summary of th
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The standardisation of DDO in Austr
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Figure 2.1 Odorant receptors and th
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Figure 2.3 Relative slope of odour
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Part 3: H 2 S health effects The pr
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such as composting can provide very
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Seigel et al 32 undertook measureme
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Rotorua District Council also under
Page 30 and 31: Kevern 56 undertook several surveys
Page 33 and 34: Part 5: H 2 S threshold information
Page 35 and 36: The American Industrial Hygiene Ass
Page 37: Earlier summaries of data in relati
Page 40 and 41: The results generated by the olfact
Page 42 and 43: At each round of the testing proces
Page 44 and 45: 6.7.2 n-Butanol vapour The standard
Page 46 and 47: 7.1.2 Ambient H 2 S levels No H 2 S
Page 48 and 49: Residence time for Rotorua panellis
Page 50 and 51: Figure 7.7 Example of incomplete ro
Page 52 and 53: A display of the “round” values
Page 54 and 55: Figure 7.11 Log 10 mean session dat
Page 56 and 57: Panellist means Figure 7.12 t-test
Page 58 and 59: The original concept behind the tes
Page 60 and 61: Figure 7.16 Frequency plots - perce
Page 62 and 63: Figure 7.17 Scatterplot showing n-b
Page 64 and 65: Several types of analysis of the gr
Page 66 and 67: Figure 8.1 Updated H 2 S threshold
Page 69: Appendix 1 - Olfactometer calibrati
Page 73 and 74: Appendix 3 - Dr Ray Littler analysi
Page 75 and 76: Effect of elevated ambient H 2 S On
Page 77 and 78: Figure 4 Untransformed is non-norma
Page 79: 14 Histogram of MnH2S_Whakatāne 12
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Odour Threshold Investigation 2012 - Bay of Plenty Regional Council

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