Paragraph
England and Wales
| If maximum concentrations exceed the assessment threshold | If maximum concentrations are between the upper and lower assessment thresholds |
|---|---|
| 1 station every 20,000 km2 | 1 station every 40,000 km2 |
England and Wales
| If maximum concentrations exceed the assessment threshold | If maximum concentrations are between the upper and lower assessment thresholds |
|---|---|
| 1 station every 20,000 km2 | 1 station every 40,000 km2 |