1.1 该试验方法用于确定沉积物滞留装置（如隔泥栅、隔泥栅或入口保护器）的过滤效率和过滤部件的流速。 1.1.1 结果显示为过滤效率的百分比和立方米每平方米每分钟（m 3. /m 2. /min）或加仑每平方英尺每分钟（gal/ft 2. /min）。 1.1.2 过滤效率表示从含沉积物的水中去除的沉积物的百分比。 1.1.3 流速是载有沉积物的水通过沉积物滞留装置的过滤部件的平均速率。 1.2 这种测试方法需要几个专门的设备，如集成的水采样器和分析天平，或真空过滤系统。根据客户的判断，试验土壤要么是特定场地的土壤，要么是代表目标默认级配的土壤。 1.3 以国际单位制表示的值是标准值，而英寸磅单位则仅供参考。在每个系统中表达的值可能不是精确等价的；因此，每个系统都必须独立使用，而不需要以任何方式组合值。 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）。 本标准的使用者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》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 该试验方法用于确定特定土壤的沉积物滞留装置（如隔泥栅、隔泥屏障或隔泥幕）过滤部件的过滤效率和流速。 5.2 该试验方法可用于设计沉积物滞留装置的过滤部件，以满足监管机构对特定土壤过滤效率或流速的要求。 5.2.1 设计者可以使用这种测试方法来确定沉积物滞留装置之间的间距。 5.3 该试验方法用于性能评估，因为结果将取决于所评估的特定土壤。除非需要使用默认土壤进行测试，否则建议用户或代表进行测试以预先批准产品，因为沉积物滞留装置制造商通常不具备处理或测试土壤要求的能力。 5.4 该试验方法提供了一种方法，用于评估在各种条件下具有不同土壤的沉积物保持装置的过滤部件，这些条件模拟了沉积物保持装置安装中存在的条件。该试验方法可用于模拟同一沉积物滞留装置样本上的几次风暴事件。因此，每个样本重复该测试的次数取决于用户和现场条件。

1.1 This test method is used to determine the filtering efficiency and the flow rate of the filtration component of a sediment retention device, such as a silt fence, silt barrier, or inlet protector. 1.1.1 The results are shown as a percentage for filtering efficiency and cubic metres per square metre per minute (m 3 /m 2 /min) or gallons per square foot per minute (gal/ft 2 /min) for flow rate. 1.1.2 The filtering efficiency indicates the percent of sediment removed from sediment-laden water. 1.1.3 The flow rate is the average rate of passage of the sediment-laden water through the filtration component of a sediment retention device. 1.2 This test method requires several specialized pieces of equipment, such as an integrated water sampler and an analytical balance, or a vacuum filtration system. At the client’s discretion, the test soil is either a site-specific soil or a soil that is representative of a target default gradation. 1.3 The values stated in SI units are the standard, while the inch-pound units are provided for information. The values expressed in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way. 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 This test method is used to determine the filtering efficiency and flow rate of the filtration component of a sediment retention device, such as a silt fence, a silt barrier, or a silt curtain, for specific soil tested. 5.2 This test method may be used for the design of the filtration component of a sediment retention device to meet requirements of regulatory agencies in filtering efficiency or flow rate for the specific soil tested. 5.2.1 The designer can use this test method to determine the spacing between sediment retention devices. 5.3 This test method is intended for performance evaluation, as the results will depend on the specific soil evaluated. Unless testing with the default soil is desired, it is recommended that the user or representative perform the test to pre-approve products, as sediment retention device manufacturers are not typically equipped to handle or test soil requirements. 5.4 This test method provides a means of evaluating the filtration component of sediment retention devices with different soils under various conditions that simulate the conditions that exist in a sediment retention device installation. This test method may be used to simulate several storm events on the same sediment retention device specimen. Therefore, the number of times this test is repeated per specimen is dependent upon the user and the site conditions.