| Elements | Concentrations of particulate (%) | |
| Minibus | Truck | |
| Fe | 52.805 | 65.236 |
| Ca | 18.562 | 9.859 |
| S | 12.403 | 8.886 |
| Zn | 6.005 | 9.817 |
| P | 4.795 | 2.417 |
| Si | 4.152 | 2.692 |
| Sc | 0.646 | 0.000 |
| Ti | 0.632 | 0.496 |
| Mn | 0.000 | 0.597 |