SCHEDULE 6REFERENCE METHODS FOR ASSESSMENT OF CONCENTRATIONS OF SULPHUR DIOXIDE, NITROGEN DIOXIDE AND OXIDES OF NITROGEN, PARTICULATE MATTER (PM 1 0 AND PM 2 . 5) AND LEAD

Regulation 7(6)

PART IReference method for the analysis of sulphur dioxide

ISO/FDIS 10498 (Standard in draft) Ambient air—determination of sulphur dioxide—ultraviolet fluorescence method14.

PART IIReference method for the analysis of nitrogen dioxide and oxides of nitrogen

ISO 7996: 1985 Ambient air—determination of the mass concentrations of nitrogen oxides—chemiluminescence method15.

PART IIIAReference method for the sampling of lead

The reference method for the sampling of lead will be that described in the Annex to Directive 82/884/EEC16 until such time as the limit value in Schedule 1 to these Regulations is to be met, when the reference method will be that for PM10 specified in Part IV of this Schedule.

PART IIIBReference method for the analysis of lead

ISO 9855: 1993 Ambient air—Determination of the particulate lead content of aerosols collected in filters. Atomic absorption spectroscopy method17.

PART IVReference method for the sampling and measurement of PM10

The reference method for the sampling and measurement of PM10 will be that described in EN 12341 ‘ Air Quality—Field Test Procedure to Demonstrate Reference Equivalence of Sampling Methods for the PM10 fraction of particulate matter ’18. The measurement principle is based on the collection on a filter of the PM10 fraction of ambient particulate matter and the gravimetric mass determination.