At hundreds of thousands of commercial, industrial, and military sites across the country, subsurface materials including groundwater are contaminated with chemical waste. The last decade has seen growing interest in using aggressive source remediation technologies to remove contaminants from the subsurface, but there is limited understanding of (1) the effectiveness of these technologies and (2) the overall effect of mass removal on groundwater quality. This report reviews the suite of technologies available for source remediation and their ability to reach a variety of cleanup goals, from meeting regulatory standards for groundwater to reducing costs. The report proposes elements of a protocol for accomplishing source remediation that should enable project managers to decide whether and how to pursue source remediation at their sites.

Presenting a clear, understandable examination, this book outlines efficient, effective methods and strategies for the complex field of subsurface remediation. The editors fully assess the state-of-knowledge of subsurface science requisite for finding new solutions, providing a focused guide for advanced subsurface remediation technology. Unparalleled in scope and practicality, Subsurface Restoration assists those persons determining the extent of environmental contamination for remedial technology selection and for environmental decision-making at all levels.

At hundreds of thousands of commercial, industrial, and military sites across the country, subsurface materials including groundwater are contaminated with chemical waste. The last decade has seen growing interest in using aggressive source remediation technologies to remove contaminants from the subsurface, but there is limited understanding of (1) the effectiveness of these technologies and (2) the overall effect of mass removal on groundwater quality. This report reviews the suite of technologies available for source remediation and their ability to reach a variety of cleanup goals, from meeting regulatory standards for groundwater to reducing costs. The report proposes elements of a protocol for accomplishing source remediation that should enable project managers to decide whether and how to pursue source remediation at their sites.

This comprehensive reference describes investigations of the fate of toxic chemicals emanating from hazardous waste sites and contaminating groundwater, discussing the hydrogeochemistry at US, Canadian, Australian, and German sites to reflect the different approaches used around the world.;Written by over 30 international experts in the field, Groundwater Contamination and Analysis at Hazardous Waste Sites: presents case histories spanning 30 years of activities by the United States Geological Survey's Organics in Water project, including studies of pesticide, munition, and wood preservative residues contaminating groundwater; outlines the U.S. Environmental Protection Agency's SW-846 methods of analysis for groundwater samples taken at hazardous waste sites; details the analytical requirements for qualitative surveys, regulatory compliance, and research programs; examines the use of statistics at site investigations and waste disposal facilities as well as data interpretation techniques such as multivariate plots; covers the application of a portable gas chromatograph in studying a vapor-phase plume of trichloroethylene, giving tips about problems that may lead to variability in the data; and explores dense nonaqueous-phase liquid dissolution using Raoult's law, biotransformation of the dissolved constituents, and their sorption to aquifer materials.;Extensively illustrated with more than 250 figures, tables, and display equations, Groundwater Contamination and Analysis at Hazardous Waste Sites is a practical tool for pollution control and environmental engineers, hydrogeologists, analytical chemists, and upper-level undergraduate and graduate students in these disciplines.

The complex topic of in-situ subsurface remediation technologies has been ad dressed at an international symposium at the Universitat Stuttgart on September 26 and 27, 1995, on the occasion of the inauguration of the research facility VEGAS (Versuchseinrichtung zur Grundwasser- und Altlastensanierung). The results are contained in this book with 22 contributions from leading experts in the field from Europe and North America. The book illustrates the role of large-scale experiments in groundwater and subsurface remediation research. The subtopics address the various links between conventional laboratory experiments, technology-scale experiments and field-site studies, showing the contribution of large-scale experiments to bridging the gap between small-scale investigations and large-scale field investigations (upscaling). The interdisciplinary nature of the problems requires a multidisciplinary approach. Therefore, the idea has been followed to bring together the various disciplines in volved in the different aspects and facets of subsurface flow, transport and trans as hydraulics and hydrology, physics, formation, involving such diverse disciplines chemistry, microbiology, geology, industrial, chemical and hydraulic engineering, mathematics and hydroinformatics. The individual contributions from these di versified fields address the subject from different angles in an attempt to form a coherent picture of the various aspects of the complex problems of subsurface remediation. The focus is on research approaches and strategies with respect to the development of new and improved technologies and to the role of large-scale experiments in research and application.