# The Air Quality Limit Values Regulations 2001, Schedule 4: CRITERIA FOR DETERMINING MINIMUM NUMBERS OF SAMPLING POINTS FOR FIXED MEASUREMENT OF CONCENTRATIONS OF RELEVANT POLLUTANTS IN AMBIENT AIR




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Source: https://www.legislation.gov.uk/uksi/2001/2315/schedule/4 (the official version)
Page: https://openlegislation.uk/air-quality-limit-values-regulations-2001/schedule-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.