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The Air Quality Limit Values (Scotland) Regulations 2003

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PART VIIOZONE

Information and alert thresholds for ozone

ParameterThreshold
(a)

The exceedance of the threshold is to be measured or predicted for three consecutive hours.

Information threshold1 hour average180μg/m3
Alert threshold1 hour average(a)240μg/m3

Minimum details to be supplied to the public when the information or alert threshold is exceeded or exceedance is predicted

7.2.  Details to be supplied to the public on a sufficiently large scale as soon as possible should include the following.

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;

(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.

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