1.1 本规范涵盖了测试土工膜对液体废物、配制的化学溶液和固体废物渗滤液的耐化学性的程序。 1.2 本规范涵盖了测试半结晶、无定形、弹性和织物增强土工膜的程序。 1.3 本实践旨在与实践结合使用 D5322 或者 D5496 ，或两者兼而有之。本规范的范围仅限于未暴露和暴露土工膜样品的测试和报告程序。 1.4 测试数据的评估和解释超出了本实践的范围。 1.5 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值不一定完全等同；因此，为确保符合标准，每个系统应独立使用，两个系统的数值不得合并使用。1.6 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 第节给出了具体的预防声明 7 . 1.7 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》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 本规范旨在为研究土工膜对液体废物、渗滤液或化学品的耐化学性的测试程序提供一系列标准程序。在没有针对所解决的特定情况所需的其他规范的情况下，应使用这种做法。 5.2 本实践中使用的耐化学性不是一个可量化的术语。本实践旨在为那些希望比较或研究土工膜耐化学性的人提供标准化基础。应认识到耐化学性是用户的判断评价，本实施规程不提供解释本实施规程中包含的试验程序所获得结果的程序。作为实践，这不会产生测试结果。 附注1: 本规范用于土工膜的耐化学性评估，与土工织物、土工网、土工格栅、土工管和土工合成粘土衬垫的类似标准规范并行编写。对于所研究的土工合成材料，每个标准都应单独考虑，对于暴露在所考虑的潜在恶劣化学环境中的所有土工合成材料，每个标准都应集体考虑。

1.1 This practice covers procedures for the testing of geomembranes for chemical resistance with liquid wastes, prepared chemical solutions, and leachates derived from solid wastes. 1.2 This practice covers procedures for testing semi-crystalline, amorphous, elastomeric, and fabric-reinforced geomembranes. 1.3 This practice is intended to be used in conjunction with Practice D5322 or D5496 , or both. The scope of this practice is limited to testing and reporting procedures for unexposed and exposed geomembrane samples. 1.4 Evaluation and interpretation of test data are beyond the scope of this practice. 1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.6 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 precautionary statements are given in Section 7 . 1.7 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 to provide a list of standard procedures for test programs investigating the chemical resistance of a geomembrane with a liquid waste, leachate, or chemical. This practice should be used in the absence of other specifications required for the particular situation being addressed. 5.2 Chemical resistance, as used in this practice, is not a quantifiable term. This practice is intended to provide a basis of standardization for those wishing to compare or investigate the chemical resistance of a geomembrane. It should be recognized that chemical resistance is a user judgment evaluation and that this practice does not offer procedures for interpreting the results obtained from test procedures contained in this practice. As a practice, this does not produce a test result. Note 1: This practice is for the chemical resistance assessment of geomembranes and is written in parallel to similar standard practices for geotextiles, geonets, geogrids, geopipes, and geosynthetic clay liners. Each standard is to be considered individually for the geosynthetic under investigation and collectively for all geosynthetics exposed to the potentially harsh chemical environment under consideration.