Standard view
SCHEDULE 4 continued PART 1
PART 1
Assessment thresholds for Group A pollutants
Benzene
|
Annual average |
| Upper assessment threshold |
70% of limit value (3.5 μg/m3) |
| Lower assessment threshold |
40% of limit value (2 μg/m3) |
Carbon monoxide
|
Eight-hour average |
| Upper assessment threshold |
70% of limit value (7 mg/m3) |
| Lower assessment threshold |
50% of limit value (5 mg/m3) |
Lead
|
Annual average |
| Upper assessment threshold |
70% of limit value (0.35 μg/m3) |
| Lower assessment threshold |
50% of limit value (0.25 μg/m3) |
Nitrogen dioxide (NO2) and oxides of nitrogen (NOx)
|
Hourly limit value for the protection of human health (NO2) |
Annual limit value for the protection of human health (NO2) |
Annual limit value for the protection of vegetation (NOx) |
| Upper assessment threshold |
70% of limit value (140 μg/m3), not to be exceeded more than 18 times in any calendar year |
80% of limit value (32 μg/m3) |
80% of limit value (24 μg/m3) |
| Lower assessment threshold |
50% of limit value (100 μg/m3), not to be exceeded more than 18 times in any calendar year |
65% of limit value (26 μg/m3) |
65% of limit value (19.5 μg/m3) |
PM10
|
24-hour average |
Annual average |
| Upper assessment threshold |
60% of limit value (30 μg/m3), not to be exceeded more than 7 times in any calendar year |
70% of limit value (14 μg/m3) |
| Lower assessment threshold |
40% of limit value (20 μg/m3), not to be exceeded more than 7 times in any calendar year |
50% of limit value (10 μg/m3) |
Sulphur dioxide
|
Health protection |
Ecosystem protection |
| Upper assessment threshold |
60% of 24-hour limit value (75 μg/m3), not to be exceeded more than 3 times in any calendar year |
60% of winter limit value (12 μg/m3) |
| Lower assessment threshold |
40% of 24-hour limit value (50 μg/m3), not to be exceeded more than 3 times in any calendar year |
40% of winter limit value (8 μg/m3) |
PART 2
Assessment thresholds for Group B pollutants
Arsenic
| Upper assessment threshold |
60% of target value (3.6 ng/m3) |
| Lower assessment threshold |
40% of target value (2.4 ng/m3) |
Benzo(a)pyrene
| Upper assessment threshold |
60% of target value (0.6 ng/m3) |
| Lower assessment threshold |
40% of target value (0.4 ng/m3) |
Cadmium
| Upper assessment threshold |
60% of target value (3 ng/m3) |
| Lower assessment threshold |
40% of target value (2 ng/m3) |
Nickel
| Upper assessment threshold |
70% of target value (14 ng/m3) |
| Lower assessment threshold |
50% of target value (10 ng/m3) |