1.1 本规程涵盖了土工合成材料对液体废物、制备的化学溶液和固体废物渗滤液的耐化学性测试的实验室浸渍程序。 1.2 本标准不适用于某些土工合成材料，如土工合成粘土衬垫（GCL），因为它们的复合性质需要在浸入过程中施加围压。然而，GCL的单个土工合成材料组件可以进行测试。 1.3 本标准最初是为了补充和扩展EPA 9090，以包括所有土工合成材料。EPA 9090自1992年以来一直没有更新。 1.4 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.5 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。 有关具体危害说明，请参阅第节 7. 。 1.6 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====== 4.1 本规程提供了一种标准浸渍程序，用于研究土工合成材料在实验室环境中对液体废物、渗滤液或化学品的耐化学性。本规程中规定的条件旨在为标准化提供基础，并为那些希望在实验室环境中比较或研究土工合成材料耐化学性的人提供指导。实践 D5496 如果用户需要评估土工合成材料在现场条件下的性能，则可以使用。 4.2 这种做法本身并不是为了确定土工合成材料在暴露于液体中时的行为。这种行为被称为耐化学性，只能根据用户选择的特定化学溶液、测试方法和评估标准来定义。

1.1 This practice covers laboratory immersion procedures for the testing of geosynthetics for chemical resistance to liquid wastes, prepared chemical solutions, and leachates derived from solid wastes. 1.2 This standard is not applicable to some geosynthetics such as geosynthetic clay liners (GCLs), because of their composite nature requiring a confining pressure during immersion. However, individual geosynthetic components of the GCL can be tested. 1.3 This standard was originally developed to supplement and expand EPA 9090 to include all geosynthetics. EPA 9090 has not been updated since 1992. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 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. For specific hazards statements, see Section 7 . 1.6 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 ====== 4.1 This practice provides a standard immersion procedure for investigating the chemical resistance of a geosynthetic to a liquid waste, leachate, or chemical in a laboratory environment. The conditions specified in this practice are intended both to provide a basis of standardization and to serve as a guide for those wishing to compare or investigate the chemical resistance of a geosynthetic material(s) in a laboratory environment. Practice D5496 can be used should the user need to assess the performance of a geosynthetic in field conditions. 4.2 This practice is not intended to establish, by itself, the behavior of geosynthetics when exposed to liquids. Such behavior, referred to as chemical resistance, can be defined only in terms of specific chemical solutions and methods of testing and evaluation criteria selected by the user.