1.1 本试验方法提供了使用随机取样过滤技术确定室内氡衰变产物（RDP）浓度和与这些浓度对应的工作水平（WL）值的准确和可重复测量的说明。 1.2 根据本试验方法进行的测量将产生代表封闭建筑条件的RDP浓度。在封闭建筑条件下进行的测量结果的可变性较小，并且比在建筑条件不受控时获得的测量结果更具再现性。本试验方法可在非受控条件下使用，但结果会发生更大程度的变化。结果的可变性也可能表明采样点存在时间可变性。 1.3 本试验方法采用短采样周期，结果仅表明采样地点和时间的条件。通过本试验方法获得的结果不一定表明取样期限较长，不应与此类结果混淆。然而，数小时和数天内多次测量的平均值可以提供有用的筛选信息。通常获得单独测量值用于诊断目的。 1.4 试验方法的范围可以考虑从0.0005 WL到无限工作水平，以及从40 Bq/m 3. 对于每个单独的氡衰变产物不受限制。 1.5 本试验方法提供了有关设备、程序和质量控制的信息。它提供了典型住宅或建筑环境中的测量，可能不一定适用于特殊情况，例如洁净室。 1.6 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.7 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。 参见第节 9 其他注意事项 1.8 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 本试验方法提供了一种相对简单的RDP浓度测定方法，无需专门为此目的而制造的专用设备。 5.2 使用该测试方法将为住宅中氡的调查人员提供一种可以确定RDP的技术。本试验方法结果的使用通常用于诊断目的，不一定表明可能通过长期测量方法获得的结果。 5.3 对建筑物中氡浓度升高的频率和暴露对健康的影响的理解提高了对实际暴露的认识的重要性。RDP的测量是潜在不良健康影响的直接原因，应以统一且可重复的方式进行； 为此，提出了本试验方法。

1.1 This test method provides instruction for using the grab sampling filter technique to determine accurate and reproducible measurements of indoor radon decay product (RDP) concentrations and of the working level (WL) value corresponding to those concentrations. 1.2 Measurements made in accordance with this test method will produce RDP concentrations representative of closed-building conditions. Results of measurements made under closed-building conditions will have a smaller variability and are more reproducible than measurements obtained when building conditions are not controlled. This test method may be utilized under non-controlled conditions, but a greater degree of variability in the results will occur. Variability in the results may also be an indication of temporal variability present at the sampling site. 1.3 This test method utilizes a short sampling period and the results are indicative of the conditions only at the place and time of sampling. The results obtained by this test method are not necessarily indicative of longer terms of sampling and should not be confused with such results. The averaging of multiple measurements over hours and days can, however, provide useful screening information. Individual measurements are generally obtained for diagnostic purposes. 1.4 The range of the test method may be considered from 0.0005 WL to unlimited working levels, and from 40 Bq/m 3 to unlimited for each individual radon decay product. 1.5 This test method provides information on equipment, procedures, and quality control. It provides for measurements within typical residential or building environments and may not necessarily apply to specialized circumstances, for example, clean rooms. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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. See Section 9 for additional precautions 1.8 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 test method provides a relatively simple method for determination of the concentration of RDP without the need for specialty equipment built expressly for such purposes. 5.2 Using this test method will afford investigators of radon in dwellings a technique by which the RDP can be determined. The use of the results of this test method are generally for diagnostic purposes and are not necessarily indicative of results that might be obtained by longer term measurement methods. 5.3 An improved understanding of the frequency of elevated radon in buildings and the health effect of exposure has increased the importance of knowledge of actual exposures. The measurement of RDP, which are the direct cause of potential adverse health effects, should be conducted in a manner that is uniform and reproducible; it is to this end that this test method is addressed.