1.1 本规程用于通过描述某些物理特性来识别废物。它是一种快速但有效的方法，用于在实验室接收废物或在采样现场收集废物时进行目视筛选。 1.2 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。 具体危险和警告信息见 8.1.6 . 1.3 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 本规程旨在供废物管理行业的人员使用，以帮助描述废物的物理特性。 5.2 这种做法有两个用途。一种是对实验室接收的废物进行视觉筛选，以确定废物、清单和历史描述之间的差异。另一个用途是在收集土壤和水样时对其进行目视检查。该信息以及样本采集过程中的专业判断可用于增加或减少基于可见污染迹象或缺乏可见污染迹象采集的样本数量，从而增加对现场污染的了解。例如，如果在已知或可疑污染区域的“向上梯度”采集土壤或地下水样本，以获得现场背景浓度，并且样本似乎受到污染，则向上梯度- 在该采样事件期间，可以重新定位梯度区域。视觉观察也可以表明需要增加或减少采样参数。这可能会减少或消除到现场进行额外采样的需要。

1.1 This practice is used to identify wastes by describing certain physical properties. It has been developed as a rapid but effective means for visually screening wastes when received in the laboratory or during collection at the sampling site. 1.2 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. Specific hazard and warning information is given in 8.1.6 . 1.3 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 This practice is intended for use by those in the waste management industries to aid in describing the physical characteristics of waste. 5.2 This practice has two uses. One is to visually screen wastes being received at the laboratory to identify discrepancies between the waste, manifest, and historical descriptions. The other use is to visually examine soil and water samples while they are being collected. This information, along with professional judgment during sample collection, can be used to increase the knowledge of the site contamination by increasing or reducing the number of samples collected based on visible indication of contamination or lack of visible indication of contamination. For example, if a soil or groundwater sample is collected “up gradient” of the area of known or suspected contamination to obtain site background concentrations, and the sample appears contaminated, the up-gradient area can be relocated during that sampling event. Visual observation could also show that the sampling parameters need to be increased or decreased. This may reduce or eliminate the need for additional sampling trips to the field.