| Element | Co | Pb | As | Fe | Ba | V | Cr | Cu | Ni | Zn |
| Concentration, ppm | ||||||||||
| Original OS | 20 | 95 | 19 | 13500 | 15 | 75 | 290 | 459 | 204 | 2870 |
| Ash at 550˚C | 25 | 112 | 25 | 17070 | 20 | 100 | 385 | 610 | 270 | 3710 |
| Ash at 750˚C | 40 | 121 | 28 | 24065 | 50 | 115 | 450 | 1110 | 305 | 4169 |
| Ash at 950˚C | 45 | 130 | 30 | 27060 | 50 | 145 | 805 | 1410 | 357 | 4485 |