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Section I of Annex IV is amended as follows: the table is replaced by the following: Distributed over the year to be representative of various conditions for climate and anthropogenic activities Indicative measurement being measurements which are performed at reduced regularity but fulfil the other data quality objectives’ ‘Benzo(a)pyrene Arsenic, cadmium and nickel Polycyclic aromatic hydrocarbons other than benzo(a)pyrene, total gaseous mercury Total deposition — Uncertainty Fixed and indicative measurements 50 % 40 % 50 % 70 % Modelling 60 % 60 % 60 % 60 % — Minimum data capture 90 % 90 % 90 % 90 % — Minimum time coverage Fixed measurements 33 % 50 % Indicative measurements 14 % 14 % 14 % 33 % in the third paragraph, the following sentence is deleted: ‘Twenty-four hour sampling is also advisable for the measurement of arsenic, cadmium and nickel concentrations.’ after the third paragraph the following text is inserted: ‘The provisions on individual samples in the previous paragraph apply also to arsenic, cadmium, nickel and total gaseous mercury. Moreover, sub–sampling of PM_(10) filters for metals for subsequent analysis is allowed, providing there is evidence that the sub-sample is representative of the whole and that the detection sensitivity is not compromised when compared with the relevant data quality objectives. As an alternative to daily sampling, weekly sampling for metals in PM_(10) is allowed provided that the collection characteristics are not compromised.’

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Source: EUR-Lex (Cellar) · retrieved 2026-10-16 · Text as adopted (Official Journal); later amendments are not incorporated in this text.