1.1 本试验方法包括以下程序:( 1. )识别土壤中的石棉( 2. )提供采样土壤（干燥）中石棉浓度的估计值，以及( 3. )可选地提供报告为每克样品中石棉结构数量的石棉浓度。 1.2 在本试验方法中，产生的结果可用于评估受建筑、矿山和制造废物、石棉自然沉淀物（NOA）污染的场地，以及研究人员感兴趣的其他来源。 1.3 本试验方法描述了重量分析、筛分和其他实验室程序，用于制备土壤进行分析，以及识别和量化检测到的任何石棉。 通过19 mm筛子的收集土壤和嵌入其中的材料将成为分析样本的一部分，并报告结果。 1.3.1 石棉通过偏振光显微镜（PLM）技术进行识别和量化，包括形态和光学特性分析。可选的透射电子显微镜（TEM）鉴定和量化石棉基于形态学、选区电子衍射（SAED）和能量色散X射线分析（EDXA）。还可以确定有关光纤尺寸的一些信息。PLM和TEM方法对纤维和结构使用不同的定义和尺寸标准。 可以生成单独的数据集。 1.4 本试验方法的分析灵敏度为0.25%（按重量计），可选程序允许分析灵敏度为0.1%（按重量计）。 1.5 本试验方法无意解决与土壤环境相关的采样策略或变量。这些考虑是研究人员收集和提交样本的责任。 附录X2 附上土壤采样和良好现场实践的覆盖要素。 1.6 单位- 以国际单位制表示的数值应视为标准。本方法中引用的其他单位仅供参考。 1.7 危险- 石棉纤维是公认的致癌物。呼吸石棉纤维会导致肺部疾病，包括石棉肺、肺癌和间皮瘤。在对怀疑含有石棉的材料进行采样和分析时，应采取预防措施，避免产生和吸入空气中的石棉颗粒。 1.8 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。 1.9 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 该分析方法用于测试土壤样本中的石棉。重点是检测和分析土壤中石棉的筛分颗粒。应单独分析和报告可识别为易于与土壤分离的散装建筑材料的碎屑。 5.2 样品的粗分数（>2 mm至<19 mm）可能含有大块含石棉的材料，这些材料可能会释放出纤维，并在筛分过程中分解成较小的碎片，通过2 mm的筛子进入中等馏分。如果研究人员不希望对原始样品进行这种更改，则应在筛分之前从样品中取出这些碎片，并在分析之前将其返回粗粒级。 5.3 本试验方法未描述评估可能受石棉污染的建筑物或室外区域的安全性或可居住性所需的程序或技术- 包含材料或符合联邦、州或地方法规或法令的。研究者有责任做出这些决定。 5.4 鉴于本试验方法产生的结果可用于评估受建筑、矿山和制造废物污染的场地；石棉自然沉积物；以及研究人员感兴趣的其他来源，将结果应用于此类评估和由此得出的结论，包括任何风险或责任评估，不在本试验方法的范围内，由研究人员负责。

1.1 This test method covers a procedure to: ( 1 ) identify asbestos in soil, ( 2 ) provide an estimate of the concentration of asbestos in the sampled soil (dried), and ( 3 ) optionally to provide a concentration of asbestos reported as the number of asbestos structures per gram of sample. 1.2 In this test method, results are produced that may be used for evaluation of sites contaminated by construction, mine and manufacturing wastes, deposits of natural occurrences of asbestos (NOA), and other sources of interest to the investigator. 1.3 This test method describes the gravimetric, sieve, and other laboratory procedures for preparing the soil for analysis as well as the identification and quantification of any asbestos detected. Pieces of collected soil and material embedded therein that pass through a 19-mm sieve will become part of the sample that is analyzed and for which results are reported. 1.3.1 Asbestos is identified and quantified by polarized light microscopy (PLM) techniques including analysis of morphology and optical properties. Optional transmission electron microscopy (TEM) identification and quantification of asbestos is based on morphology, selected area electron diffraction (SAED), and energy dispersive X-ray analysis (EDXA). Some information about fiber size may also be determined. The PLM and TEM methods use different definitions and size criteria for fibers and structures. Separate data sets may be produced. 1.4 This test method has an analytical sensitivity of 0.25 % by weight with optional procedures to allow for an analytical sensitivity of 0.1 % by weight. 1.5 This test method does not purport to address sampling strategies or variables associated with soil environments. Such considerations are the responsibility of the investigator collecting and submitting the sample. Appendix X2 covering elements of soil sampling and good field practices is attached. 1.6 Units— The values stated in SI units are to be regarded as the standard. Other units may be cited in the method for informational purposes only. 1.7 Hazards— Asbestos fibers are acknowledged carcinogens. Breathing asbestos fibers can result in disease of the lungs including asbestosis, lung cancer, and mesothelioma. Precautions should be taken to avoid creating and breathing airborne asbestos particles when sampling and analyzing materials suspected of containing asbestos. 1.8 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. 1.9 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 analysis method is used for the testing of soil samples for asbestos. The emphasis is on detection and analysis of sieved particles for asbestos in the soil. Debris identifiable as bulk building material that is readily separable from the soil is to be analyzed and reported separately. 5.2 The coarse fraction of the sample (>2 mm to <19 mm) may contain large pieces of asbestos-containing material that may release fibers and break down during the sieving process into smaller pieces that pass through the 2-mm sieve into the medium fraction. If this alteration of the original sample is not desired by the investigator, these pieces should be removed from the sample before sieving and returned to the coarse fraction before analysis. 5.3 This test method does not describe procedures or techniques required to evaluate the safety or habitability of buildings or outdoor areas potentially contaminated with asbestos-containing materials or compliance with federal, state, or local regulations or statutes. It is the investigator's responsibility to make these determinations. 5.4 Whereas this test method produces results that may be used for evaluation of sites contaminated by construction, mine, and manufacturing wastes; deposits of natural occurrences of asbestos; and other sources of interest to the investigator, the application of the results to such evaluations and the conclusions drawn there from, including any assessment of risk or liability, is beyond the scope of this test method and is the responsibility of the investigator.