ISO 18400-106:2017 provides guidelines for quality assurance and quality control (QA/QC) for soil sampling. It identifies the steps which are subject to QA and QC in situations where QA and QC are required. It addresses aspects of QA and QC of the International Standards under the ISO 18400‑100 umbrella (level 1, level 2) and gives guidance to methods on level 3.
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