Abstract This guide discusses the relevancy of applicable test methods, including the materials and conditions involved, in obtaining the vapor transmission in geomembranes. This guide does not purport to critique barrier system permeability, nor does it address transmission through seams. The guide assumes the material being examined exhibits Fickian diffusion behavior. The tests discussed here evaluate gas and vapor transfer through semi-permeable and permeable geomembranes. The data is important for design of containment systems. Scope 1.1 This guide is used as a discussion of the relevancy of several methods to obtain the vapor transmission of geomembranes. 1.2 This guide discusses applicable test methods, test materials, and conditions. 1.3 The guide assumes the material being measured exhibits Fickian behavior. 1.4 This guide does not purport to critique barrier system permeability. 1.5 The guide does not address transmission through seams. 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. 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.
