Guidance

Guidelines for ash sampling and analysis

Guidance on ash sampling strategies, formerly called M4 guidelines for ash sampling and analysis.

• From: Environment Agency
• Published: 7 April 2014
• Last updated: 16 September 2025
  Show all updates

  1. 16 September 2025

     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.

  2. 6 July 2016

     Updated guidelines for ash sampling and analysis June 2016

  3. 7 April 2014

     First published.

Applies to England

Documents

Guidelines for ash sampling and analysis

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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.