| Types of hazardous substances | Allowable release or content | Testing method |
|---|---|---|
| Cesium radiation | 30 Bq/kg or less | Measurement of radioactivity in the environment - Soil - Part 3: Measurement of gamma-emitting radionuclides (KS A ISO 18589-3) |
| Sulfur (S) | 0.05% or less | |
| Chlorine (Cl) | 0.05% or less | |
| Nitrogen (N) | 1.0% or less | |
| Arsenic (As) | 1.0 mg/kg or less | |
| Cadmium (Cd) | 0.5 mg/kg or less | Standard and Quality Criteria of Wood-based |
| Chromium (Cr) | 10 mg/kg or less | Products |
| Copper (Cu) | 10 mg/kg or less | (National Institute of Forest Science) |
| Lead (Pb) | 10 mg/kg or less | |
| Mercury (Hg) | 0.05 mg/kg or less | |
| Nickel (Ni) | 10 mg/kg or less | |
| Zinc (Zn) | 100 mg/kg or less |