SCHEDULE 7INFORMATION AND ALERT THRESHOLDS
PART Iinformation and alert thresholds for ozone
Parameter | Threshold | |
---|---|---|
Information threshold | 1 hour average | 180μg/m3 |
Alert threshold | 1 hour average (a) | 240μg/m3 |
(a) The exceedance of the threshold is to be measured or predicted for three consecutive hours. |
PART IIMinimum details to be supplied to the public when the information or alert threshold is exceeded or exceedance is predicted
Details to be supplied to the public on a sufficiently large scale as soon as possible should include:
1
Information on any observed exceedance:
a
the location or area of the exceedance;
b
the type of threshold exceeded (information threshold or alert threshold);
c
the time at which the exceedance began and its duration; and
d
the highest 1-hour and 8-hour mean concentration.
2
Forecast for the following afternoon, day or days:
a
the geographical area of expected exceedances of an information threshold or alert threshold; and
b
the expected change in pollution (that is, improvement, stabilisation or deterioration)
3
Information on the type of population concerned, possible health effects and recommended conduct:
a
information on population groups at risk;
b
description of likely symptoms;
c
recommended precautions to be taken by the population concerned; and
d
where to find further information.
4
Information provided under this Schedule shall also include:
a
information on preventive action to reduce pollution or exposure to it;
b
an indication of main source sectors; and
c
recommendations for action to reduce emissions.