Table 9.
Correlationsa of VOC Data with EC and PM2.5 Data
Loading Dock | Mechanic Shop | Yard Upwind | ||||
---|---|---|---|---|---|---|
Compound | EC | PM2.5 | EC | PM2.5 | EC | PM2.5 |
Trimethylpentane | 0.53b | 0.56b | 0.41b | 0.21 | 0.52b | 0.37b |
Dimethylpentane | 0.57b | 0.43b | 0.60b | 0.04 | 0.54b | 0.32b |
2-Methylhexane | 0.54b | 0.40b | 0.56b | 0.06 | 0.60b | 0.35b |
Methylpentane | 0.59b | 0.46b | 0.47 | 0.19 | 0.56b | 0.32b |
3-Methylhexane | 0.57b | 0.45b | 0.56b | 0.04 | 0.59b | 0.35b |
Methylcyclohexane | 0.54b | 0.50b | 0.61b | 0.19 | 0.63b | 0.44b |
Hexane | 0.23 | 0.52b | 0.34 | 0.35 | 0.71b | 0.24b |
1,3-Butadiene | 0.34b | 0.44b | 0.66b | 0.24 | 0.39b | 0.53b |
Benzene | 0.57b | 0.63b | 0.67b | 0.34 | 0.59b | 0.35b |
Ethylbenzene | 0.33b | 0.39b | −0.13 | −0.33 | 0.61b | 0.39b |
m&p-Xylenes | 0.40b | 0.38b | −0.13 | −0.33 | 0.60b | 0.37b |
o-Xylene | 0.42b | 0.40b | −0.13 | −0.33 | 0.62b | 0.40b |
Styrene | 0.53b | 0.21 | 0.51b | 0.30 | 0.61b | 0.49b |
Toluene | 0.09 | 0.32b | 0.55b | 0.22b | 0.61b | 0.39b |
MTBE | −0.13 | 0.51b | 0.44 | 0.06 | 0.39b | 0.53b |
Acetone | 0.40b | 0.38b | 0.80b | 0.18 | 0.28b | 0.40b |
Acetaldehyde | 0.12 | 0.70b | 0.18 | 0.57b | 0.24b | 0.27b |
Formaldehyde | 0.24b | 0.51b | 0.91b | 0.47 | 0.28b | 0.26b |
Nonparametric Spearman correlation coefficients.
Significant at the 5% level.