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The Air Quality Regulations 1997
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- 1997 No. 3043
- SCHEDULE
- Regulation 10
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Interpretation
10. An hourly mean is a mean calculated every hour. The hourly mean for a particular substance at a particular location for a particular hour is the mean of the levels recorded, at a frequency of not less than once every 10 seconds, for that substance at that location during that hour.
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