d_removal_comp_so
| CODE | DESCRIPTION | FROM_YEAR | TO_YEAR |
|---|---|---|---|
| 1.00 | No removal | 1984 | |
| 2.00 | Removal of organic carbon | 1984 | |
| 2.10 | Hydrogen peroxide | 1984 | |
| 2.20 | Pre-ignition at 850°C | 1984 | |
| 3.00 | Removal of soluble salts and gypsum | 1984 | |
| 3.10 | Washing with water | 1984 | |
| 4.00 | Removal of carbonates | 1984 | |
| 4.10 | Hydrochloric acid | 1984 | |
| 4.20 | Hydrochloric acid/Calcium chloride | 1984 | |
| 5.00 | Removal of OC and carbonates | 1984 | |
| 6.00 | Removal of OC, carbonates, soluble salts and gypsum | 1984 |