# Commission Implementing Decision of 28 February 2012 establishing the best available techniques (BAT) conclusions under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions for iron and steel production (notified under document C(2012) 903) (Text with EEA relevance) (2012/135/EU), Division: Description (relevant for BAT 14 and 15)

Extent: E+W+S+N.I.

The monitoring of process gases provides information about the composition of process gases and about indirect emissions from the combustion of process gases, such as emissions of dust, heavy metals and SOx.
Stack emissions can be measured by regular, periodic discontinuous measurements at relevant channelled emission sources over a sufficiently long period, to obtain representative emission values.
For monitoring the discharge of waste water a great variety of standardised procedures exist for sampling and analyzing water and waste water, including:
a random sample which refers to a single sample taken from a waste water flow
a composite sample, which refers to a sample taken continuously over a given period, or a sample consisting of several samples taken either continuously or discontinuously over a given period and blended
a qualified random sample shall refer to a composite sample of at least five random samples taken over a maximum period of two hours at intervals of no less than two minutes, and blended.
Monitoring should be done according to the relevant EN or ISO standards. If EN or ISO standards are not available, national or other international standards should be used that ensure the provision of data of an equivalent scientific quality.

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Source: https://www.legislation.gov.uk/eudn/2012/135/annex/division/3/division/1.1/division/1.1.7/division/15/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2012-135/annex/division-3/division-1.1/division-1.1.7/division-15/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.