This new book containing the proceedings of the 4th Geoenvironmental Engineering Conference, organised by the British Geotechnical Association and Cardiff University's School of Engineering, held in Stratford-Upon-Avon in June 2004.The theme of the conference was Integrated Management of Groundwater and Contaminated Land. This book is a compilation of peer-reviewed papers; grouped according to the sessions under which they were presented at the conference. Issues associated with Geoenvironmental Engineering continue to be a major preoccupation for Governments, public and private organisations and the general community around the world. The conference brought together people working in industry, academia and the public sector to discuss the latest ideas and developments in Geoenvironmental Engineering and related fields. The papers in these proceedings reflect the work being undertaken across the discipline.This volume is an indispensable source of information on current research and practice in the field of integrated management of groundwater and contaminated land.