# Commission Implementing Decision of 9 December 2013 establishing the best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions, for the production of chlor-alkali (notified under document C(2013) 8589) (Text with EEA relevance) (2013/732/EU), Division 5: Monitoring of emissions

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

BAT 7: BAT is to monitor emissions to air and water by using monitoring techniques in accordance with EN standards with at least the minimum frequency given below. If EN standards are not available, BAT is to use ISO, national or other international standards that ensure the provision of data of an equivalent scientific quality.
Monitoring encompasses both continuous and periodic monitoring as indicated.
Environmental medium
Substance(s)
Sampling point
Method
Standard(s)
Minimum monitoring frequency
Monitoring associated with
Air
Chlorine and chlorine dioxide, expressed as Cl2
Outlet of chlorine absorption unit
Electrochemical cells
No EN or ISO standard available
Continuous
—
Absorption in a solution, with subsequent analysis
No EN or ISO standard available
Yearly (at least three consecutive hourly measurements)
BAT 8
Water
Chlorate
Where the emission leaves the installation
Ion chromatography
EN ISO 10304–4
Monthly
BAT 14
Chloride
Brine purge
Ion chromatography or flow analysis
EN ISO 10304–1 or EN ISO 15682
Monthly
BAT 12
Free chlorine
Close to the source
Reduction potential
No EN or ISO standard available
Continuous
—
Where the emission leaves the installation
Free chlorine
EN ISO 7393–1 or –2
Monthly
BAT 13
Halogenated organic compound
Brine purge
Adsorbable organically-bound halogens (AOX)
Annex A to EN ISO 9562
Yearly
BAT 15
Mercury
Outlet of the mercury treatment unit
Atomic absorption spectrometry or atomic fluorescence spectrometry
EN ISO 12846 or EN ISO 17852
Daily
BAT 3
Sulphate
Brine purge
Ion chromatography
EN ISO 10304–1
Yearly
—
Relevant heavy metals (e.g. nickel, copper)
Brine purge
Inductively-coupled plasma optical emission spectrometry or inductively-coupled plasma mass spectrometry
EN ISO 11885 or EN ISO 17294-2
Yearly
—

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Source: https://www.legislation.gov.uk/eudn/2013/732/annex/division/4/division/5 (the official version)
Page: https://openlegislation.uk/eu-decision-2013-732/annex/division-4/division-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.