Paragraph 2
A running annual mean is a mean which is calculated on an hourly basis, yielding one running annual mean per hour and the running annual mean for a particular substance at a particular location for a particular hour is the mean of the hourly levels for that substance at that location for that hour and the preceding 8,759 hours.
For the purpose of the calculation of a running annual mean, the hourly level for a particular substance at a particular location is either–
the level at which that substance is recorded as being present in the air at that location during the hour on the basis of a continuous sample of air taken during that hour for at least 30 minutes; or
the mean of the levels recorded at that location on the basis of 2 or more samples of air taken during the hour for an aggregate period of at least 30 minutes.
Notes on Schedule
Textual amendments
- F1
Words in sch. Table inserted (12.6.2002) by The Air Quality (Scotland) Amendment Regulations 2002 (S.S.I. 2002/297), regs. 1(1), 2(4)(a)
- F2
Word in sch. Table substituted (12.6.2002) by The Air Quality (Scotland) Amendment Regulations 2002 (S.S.I. 2002/297), regs. 1(1), 2(4)(b)
- F3
Words in sch. Table inserted (1.4.2016) by The Air Quality (Scotland) Amendment Regulations 2016 (S.S.I. 2016/162), regs. 1, 2(4)
- F4
Words in sch. Table inserted (12.6.2002) by The Air Quality (Scotland) Amendment Regulations 2002 (S.S.I. 2002/297), regs. 1(1), 2(4)(c)
- F5
Words in sch. Table inserted (12.6.2002) by The Air Quality (Scotland) Amendment Regulations 2002 (S.S.I. 2002/297), regs. 1(1), 2(4)(d)