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Fugitive and diffuse emissions of common concern to

industry sectors - Standard method to determine diffuse

emissions of volatile organic compounds into the

atmosphere

1 Scope

This document specifies the framework for determining emissions to the atmosphere of Volatile Organic

Compounds (VOCs). It specifies a system of methods to detect and/or identify and/or quantify VOC

emissions from industrial sources. These methods include Optical Gas Imaging (OGI), Differential

Absorption Lidar (DIAL), Solar Occultation Flux (SOF), Tracer Correlation (TC), and Reverse Dispersion

Modelling (RDM). It specifies the methodologies for carrying out all the above, and also the performance

requirements and capabilities of the direct monitoring methods, the requirements for the results and

their measurement uncertainties.

This document specifically addresses, but is not restricted to, the petrochemicals, oil refining, and

chemical industries receiving, processing, storing, and/or exporting of VOCs, and includes the emissions

of VOCs from the natural gas processing/conditioning industry and the storage of natural gas and similar

fuels. The methods specified in this document have been validated at onshore facilities.

This document is applicable to diffuse VOC emissions to atmosphere but not to the emissions of VOCs into

water and into solid materials such as soils. It is complementary to EN 15446 [9], the standardized

method for the detection, localization of sources (individual leaks from equipment and piping), and

quantification of fugitive VOC emissions within the scope of a Leak Detection and Repair Programme

(LDAR).

This document has been validated for non-methane VOCs, but the methodology is in principle applicable

to methane and other gases.

This document specifies methods to determine (detect, identify and/or quantify) VOC emissions during

the periods of monitoring. It does not address the extrapolation of emissions to time periods beyond the

monitoring period