| Target soil | Mudstone |
| Metal-insolubilizing material | Metal-insolubilizing material A |
| Addition amount of metal-insolubilizing material | 30, 60 kg/m3 |
| Leaching test method | Soil Contamination Countermeasures Act |
| Environmental quality standards for soil (As, Pb, Se, Cd) | 0.01 mg/L or less |
| pH test method | Suspension method |
| Curing period of sample | 3 days |