The purpose of this book is to help engineers and scientists better understand dense nonaqueous phase liquid (DNAPL) contamination of groundwater and the methods and technology used for characterization and remediation. Remediation of DNAPL source zones is very difficult and controversial and must be based on state-of-the-art knowledge of the behavior (transport and fate) of nonaqueous phase liquids in the subsurface and site specific geology, chemistry and hydrology. This volume is focused on the characterization and remediation of nonaqueous phase chlorinated solvents and it is hoped that mid-level engineers and scientists will find this book helpful in understanding the current state-of-practice of DNAPL source zone management and remediation.

In the late 1970s and early 1980s, our nation began to grapple with the legacy of past disposal practices for toxic chemicals. With the passage in 1980 of the Comprehensive Envir- mental Response, Compensation, and Liability Act (CERCLA), commonly known as Sup- fund, it became the law of the land to remediate these sites. The U. S. Department of Defense (DoD), the nation’s largest industrial organization, also recognized that it too had a legacy of contaminated sites. Historic operations at Army, Navy, Air Force, and Marine Corps facilities, ranges, manufacturing sites, shipyards, and depots had resulted in widespread contamination of soil, groundwater, and sediment. While Superfund began in 1980 to focus on remediation of heavily contaminated sites largely abandoned or neglected by the private sector, the DoD had already initiated its Installation Restoration Program in the mid-1970s. In 1984, the DoD began the Defense Environmental Restoration Program (DERP) for contaminated site assessment and remediation. Two years later, the U. S. Congress codified the DERP and directed the Secretary of Defense to carry out a concurrent program of research, development, and demonstration of innovative remediation technologies. As chronicled in the 1994 National Research Council report, “Ranking Hazardous-Waste Sites for Remedial Action,” our early estimates on the cost and suitability of existing techn- ogies for cleaning up contaminated sites were wildly optimistic. Original estimates, in 1980, projected an average Superfund cleanup cost of a mere $3.

Environmental forensics is emerging and evolving into a recognized scientific discipline with numerous applications, especially regarding chlorinated solvents. This unique book provides the reader with a concise compilation of information regarding the use of environmental forensic techniques for age dating and identification of the source of a chlorinated solvent release. Concentrating on the five commonly encountered chlorinated solvents (perchloroethylene, trichloroethylene, methyl chloroform, carbon tetrachloride and CFC-113), forensic opportunities applicable to each are presented including the use of stabilizers, manufacturing impurities, surrogate chemicals and physical measurements and degradation products as diagnostic indicators. Detailed historical chronology of the applications of the solvents and specific chapters devoted to dry cleaning and vapor degreasing equipment are included as are generic forensic approaches. Forming a basis for further ideas in the evolution of environmental forensic techniques, Chlorinated Solvents will be an indispensable reference tool for researchers, regulators and analysts in the field.

The first comprehensive guide to one of today's most innovative approaches to environmental contamination Natural attenuation is gaining increasing attention as a nonintrusive, cost-effective alternative to standard remediation techniques for environmental contamination. This landmark work presents the first in-depth examination of the theory, mechanisms, and application of natural attenuation. Written by four internationally recognized leaders in this approach, the book describes both biotic and abiotic natural attenuation processes, focusing on two of the environmental contaminants most frequently encountered in groundwater--fuels and chlorinated solvents. The authors draw on a wealth of combined experience to detail successful techniques for simulating natural attenuation processes and predicting their effectiveness in the field. They also show how natural attenuation works in the real world, using numerous examples and case studies from a wide range of leading-edge projects nationwide involving fuel hydrocarbons and chlorinated solvents. Finally, they discuss the evaluation and assessment of natural attenuation and explore the design of long-term monitoring programs. An indispensable reference for anyone working in environmental remediation, Natural Attenuation of Fuels and Chlorinated Solvents in the Subsurface is essential reading for scientists and engineers in a range of industries, as well as state and federal environmental regulators, and professors and graduate students in environmental or chemical engineering.

Allyl isothiocyanate; ortho-Anisidine; Atrazine; Butyl benzyl phthalate; Chloroform; Chlorothalonil;Cyclamates;Dichlorobenzenes;Hexachlorobutadiene; Hexachloroethane; d-Limonene; Melamine; Methyl tert-butyl ether; Nitrilotriaceticacid andits salts;Paracetamol; ortho-Phenylphenol and its sodium salt; Potassium bromate ;Quercetin; Saccharin and its salts;Simazine

Filled with updated information, equations, tables, figures, and citations, Environmental Investigation and Remediation: 1,4-Dioxane and Other Solvent Stabilizers, Second Edition provides the full range of information on 1,4-dioxane. It offers passive and active remediation strategies and treatment technologies for 1,4-dioxane in groundwater and provides the technical resources to help readers choose the best methods for their particular situation. This new edition includes all new information on remediation costs and reflects the latest research in the field. It includes new practical case studies to illustrate the concepts presented, including 1,4-dioxane occurrence in Long Island and the Cape Fear watershed in North Carolina. Features: Fully updated throughout to reflect the most recent research on 1,4-dioxane Describes the nature and extent of 1,4-dioxane releases, their regulation, and their remediation in a variety of geologic settings Examines 1,4-dioxane analytical chemistry, its many industrial uses, and 1,4-dioxane occurrence as a byproduct in production of many products Provides ample site data for recent and relevant remediation case studies, and a review of the widely varying regulatory landscape for 1,4-dioxane cleanup levels and drinking water limits Discusses the importance of accounting for contaminant archeology in investigating contaminated sites, and leveraging solvent stabilizers in forensic investigations While written primarily for practicing professionals, such as environmental consultants and attorneys, water utility engineers, and laboratory managers, the book will also appeal to researchers and academics as well. This new edition serves as a highly useful reference on the occurrence, sampling and analysis, and remedial investigation and design for 1,4-dioxane and related contaminants.