Paragraph 1
The following information on ozone concentrations must be obtained and collated—
| Type of station | Level | Averaging /accumulation time | Provisional data for each month from April to September | Report for each year | |
|---|---|---|---|---|---|
(1) Maximum daily 8-hour mean. | |||||
(2) In this table, “AOT40” has the same meaning as in paragraph 3(d) of Part 4 of Schedule 1. | |||||
| Information threshold | Any | 180μg/m3 | 1 hour | For each day with any exceedance: date, total hours of, exceedance, maximum 1-hour ozone and related NO2 values when required | For each day with any exceedance: date, total hours of exceedance, maximum 1-hour ozone and related NO2 values, when required |
| Monthly 1-hour maximum ozone | |||||
| Alert threshold | Any | 240μg/m3 | 1 hour | For each day with any exceedance: date, total hours of exceedance, maximum 1-hour ozone and related NO2 values, when required | For each day with any exceedance: date, total hours of exceedance, maximum 1-hour ozone and related NO2 values, when required |
| Health protection | Any | 120μg/m3 | 8 hours | For each day with any exceedance: date, 8 hours maximumf1 | For each day with any exceedance: date, 8 hours maximum |
| Vegetation protection | Suburban, rural, rural background | AOT40f2 = 6,000 μg/m3.h | 1 hour, accumulated from May to June | Value | |
| Forest protection | Suburban, rural, rural background | AOT40 = 20,000 μg/m3.h | 1 hour, accumulated from April to September | Value | |
| Materials | Any | 40 μg/m3 | 1 year | Value | |
Annotations
Footnotes
- f1
(1)
Maximum daily 8-hour mean.
- f2
(2)
In this table, “AOT40” has the same meaning as in paragraph 3(d) of Part 4 of Schedule 1.