Guidance
Guidelines for ash sampling and analysis
Guidance on ash sampling strategies, formerly called M4 guidelines for ash sampling and analysis.
Applies to England
Documents
Details
This technical guidance note provides guidance to Environment Agency staff, monitoring contractors, industry and other interested parties on design sampling strategies for taking representative samples of residues from industrial processes.
Updates to this page
Published 7 April 2014
Last updated 16 September 2025
show all updates
-
The PDF version of this guidance has been replaced with a new HTML format to improve accessibility and user experience. Updated references to published guidance, measurement standards and legislation throughout the guidance.
-
Updated guidelines for ash sampling and analysis June 2016
-
First published.