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Distribution of annually recorded benzene emissions (tonnes per year) by petrochemical facility size, where “Small” is <0.5km2, “Medium” = 0.5-1 km2, “Large” = 1–2 km2, and “Extra-Large” >2km2.
| Distribution | Facility Extent |
Total (n=156) | |||
|---|---|---|---|---|---|
| Small (N=56) | Medium (N=45) | Large (N=45) | Extra-large (N=10) | ||
| 25thPercentile | 1.6 t/y | 3.8 t/y | 12.4 t/y | 86.1 t/y | 3.2 t/y |
| 50thPercentile | 2.6 t/y | 7.4 t/y | 19.3 t/y | 124.6 t/y | 7.9 t/y |
| 75thPercentile | 4.7 t/y | 13.3 t/y | 28.0 t/y | 198.9 t/y | 22.6 t/y |
