1.1 本指南涵盖采样设备和程序以及“现场”保存，不包括对采样结果也有重大影响的井位、深度、油井开发、设计和施工、筛选或分析程序。本指南旨在帮助知识渊博的专业人员选择设备，从地下水监测井中获取与所采样地层、现场水文地质和数据最终用途兼容的代表性样本。 1.2 本指南仅旨在对从监测井收集地下水质量样本的许多最常用方法进行审查，而不是作为任何特定应用的地下水监测计划。由于可用的选项数量庞大且不断增加，没有任何一本指南可以被视为全面的。从业者必须尽一切努力确保所使用的方法（无论本指南是否提及）足以满足每个现场的监测目标。 1.3 以国际单位制表示的数值应视为标准值。括号中给出的值仅供参考。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 地下水质量已成为国家关注的问题。地下水监测井是评估地下水质量、划定污染羽流和建立危险品管理设施完整性的更重要工具之一。 5.2 地下水监测井采样的目标是获得满足DQOs的样本。本指南讨论了各种油井取样方法、设备和样品保存技术的优缺点。 它审查了在制定有效抽样计划时需要考虑的变量。

1.1 This guide covers sampling equipment and procedures and “in the field” preservation, and it does not include well location, depth, well development, design and construction, screening, or analytical procedures that also have a significant bearing on sampling results. This guide is intended to assist a knowledgeable professional in the selection of equipment for obtaining representative samples from ground-water monitoring wells that are compatible with the formations being sampled, the site hydrogeology, and the end use of the data. 1.2 This guide is only intended to provide a review of many of the most commonly used methods for collecting ground-water quality samples from monitoring wells and is not intended to serve as a ground-water monitoring plan for any specific application. Because of the large and ever increasing number of options available, no single guide can be viewed as comprehensive. The practitioner must make every effort to ensure that the methods used, whether or not they are addressed in this guide, are adequate to satisfy the monitoring objectives at each site. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The quality of ground water has become an issue of national concern. Ground-water monitoring wells are one of the more important tools for evaluating the quality of ground water, delineating contamination plumes, and establishing the integrity of hazardous material management facilities. 5.2 The goal in sampling ground-water monitoring wells is to obtain samples that meet the DQOs. This guide discusses the advantages and disadvantages of various well sampling methods, equipment, and sample preservation techniques. It reviews the variables that need to be considered in developing a valid sampling plan.