SCHEDULE 5Minimum number of sampling points

PART 3Group B pollutants

5

This Part sets out the minimum number of sampling points for fixed measurement of Group B pollutants to assess compliance with target values in zones where fixed measurement is the sole source of information.

Diffuse sources

Population of zone (thousands)

Where maximum concentrations exceed the upper assessment threshold(1)

Where maximum concentrations are between the upper and lower assessment thresholds

Arsenic, Cadmium, Nickel

Benzo(a)pyrene

Arsenic, Cadmium, Nickel

Benzo(a)pyrene

0–749

1

1

1

1

750–1999

2

2

1

1

2000–3749

2

3

1

1

3750–4749

3

4

2

2

4750–5999

4

5

2

2

6000 or more

5

5

2

2

(1)

To include at least one urban-background station and for benzo(a)pyrene also one traffic-oriented station provided this does not increase the number of sampling points.