This unique publication provides an international perspective on one of the most complex issues in hydrology: field and laboratory measurement of low permeability and dual porosity materials. Eleven peer-reviewed papers, written by an international group of experts, focus on the development of techniques to evaluate hydraulic conductivity and remediation of fine grained and dual porosity geologic materials. Topics address: Test Procedures; Laboratory and Field Evaluations; and Low Permeability Environments and Remediation Issues.