Transcription of Technical Guidance Note M20 - GOV.UK
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Technical Guidance Note M20 - GOV.UK
Linear Technical Guidance Note (Monitoring) M20 Quality assurance of continuous emissions monitoring systems - application of EN 14181 Environment Agency Version 5 April 2021 i Foreword This document provides monitoring support to our Regulatory Officers, as well as process operators, test laboratories, equipment suppliers, and those with interests in emissions monitoring. It supports the application of EN 141811, Stationary source emissions quality assurance of automated measuring systems, and a related standard, EN 13284-22 Stationary source emissions - Determination of low range mass concentration of dust - Part 2: Automated measuring systems. For simplicity, this document will refer to testing laboratories to cover both commercial testing laboratories and industrial operators in-house monitoring arrangements since EN 14181 uses this term. It will also use the term CEMs (Continuous Emission Monitoring Systems) instead of AMS (Automated Measuring Systems).
manual zero and span checks. The QAL3 requirements also apply to peripheral measurements, althoughthis would ordinarily only mean zero and span measurements for oxygen and moisture-monitoring systems (if applicable). Additionally, both extractive and in-situ/cross-stack systems require QAL3 checks.
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