ISO 18400-106:2017 土壌の質 — サンプリング — Part 106: 品質管理と品質保証 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 190, Soil quality, Subcommittee SC 2, Sampling.

A list of all parts in the ISO 18400 series can be found on the ISO website.

Introduction

Quality assurance (QA) comprises all those measures taken to ensure that results of the investigation are “fit for purpose”, including documentation, procedures to be followed, the setting of data quality objectives (i.e. for type, quality, and quantity) and reporting.

The overall quality of soil and site investigations and assessments depends on the quality of each separate step of the overall process, i.e. planning, sampling, pretreatment, analysis and evaluation, and interpretation of all results. This document only applies to sampling. Sampling is a very critical step in the whole procedure because errors made can usually not be recognized nor corrected in the laboratory or in the office afterwards.

A prerequisite for fit for purpose and reproducible analytical and test results is QA for sampling, including assuring:

• representativeness of samples;
• avoiding cross-contamination and unwanted changes or alterations of the sample during sampling, on-site pretreatment, transport, and delivery;
• making, recording, and reporting appropriate field observations;
• fit for purpose field measurements;
• a defined chain of custody process.

In Figure 1, the different steps of an investigation programme are given. This document describes the QA in the first three steps.

This document is part of a series on sampling standards for soil. The role/position of the International Standards within the total investigation programme is also shown in Figure 1.

Figure 1—Links between the essential elements of an investigation programme

1 Scope

This document 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.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 11074 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography