Includes bibliographical references and index.

DENSE CHLORINATED SOLVENTS IN GROUNDWATER BACKGROUND AND HISTORY OF THE PROBLEM: Chlorinated solvent usage -- Source types for slovents in groundwater -- The physical, chemical, and bilogical properties of chlorinated solvent compunds -- Drinking water limits -- Typical Chlorinated solvent plumes in groundwater -- A history of how we became aware that dense chlorinated solvents can pose serious threats to groundwater systems -- CONCEPTUAL MODELS FOR THE BEHAVIOR OF DENSE NON AQUEOUS PHASE LIQUIDS IN THE SUBSURFACE: Physical and chemical principles -- DNAPLs in the Vadose zone -- DNAPLs in the groundwater zone -- Plumes from DPNALs -- Implications for site chracterization and monitoring -- Implications for site remediation -- MECHANICS AND MATHEMATICS OF THE MOVEMENT OF DENSE NON AQUEOUS PHASE LIQUIDS IN POROUS MEDIA: Capillary pressure and fluid contents -- Distribution of DNAPL in a pool above an aquitard -- Darcy's law and relatibe permeability-- The effect of DNAPL in unsteady horizontal flows -- Stability of two fluid displacements -- NUMERICAL SIMULATION OF THE MIGRATION OF DENSE NON AQUEOUS PHASE LIQUIDS IN POROUS MEDIA: The modeling process -- Model usage -- Example -- EXPERIMENTAL STUDIES OF THE MOVEMENT OF CHLORINATED SOLVENT COMPUNDS AND OTHER DNAPLS IN THE VADOSE, CAPILLARY, AND GROUNDWATER ZONES: DNAPL movement in the Vadose zone -- DNAPL movement in the capillary zone -- DNAPL movement in the groundwater zone -- DNAPL retention capacity of porous media -- Solvent migration in fractured media -- Studies using microscopic models of porous media -- Experimental releases of chlorinated solvents in the field -- Chlorinated solvent vapor transport in the Vadose zone -- Chlorinated solvent dissolution in the groundwater zone -- VAPOR MIGRATION IN THE VADOSE ZONE: Phase partitioning -- Gaseous transport -- Aqueous transport -- Interactions with the atmosphere -- Interactions with groundwater -- Soil gas surveys -- A pair of field expermients -- DISSOULUTION OF DENSE NON AQUEOUS PHASE LIQUIDS IN THE SUBSURFACE: Solubility from pure DNAPLs and from DNAPL mixtures -- Dissolution processes -- Multi component DNAPLs -- SORPTION OF DISSOLVED CHLORINATED SOLVENTS TO AQUIFER MATERIALS: Effects of sorption on transport -- Sorption mechanisms effects of sorbent of soil water partitioning -- Methods for measuring sorption -- Non Ideal sorption behavior in a saturated system-- effects on sorption caused by properties of the aqueous phase -- Sorption to unsaturated soil. -- CHEMICAL AND MICROBIOLOGICAL TRANSFORMATIONS AND DEGRADATION OF CHLORINATED SOLVENT COMPOUNDS: Chemical reactions -- Microbiology of the subsurface -- Biotransformation of Haloliphatic compounds -- THE EFFECTS OF CHLORINATED SOLVENTS ON THE PERMEABILITY OF CLAYS: Mechanisms controlling the swelling of clays -- Relevent properties of organic chemicals-- Laboratory investigations of clay organic interactions -- Field studies -- PHYSICS GOVERNING THE MIGRATION OF DENSE NON AQUEOUS PHASE LIQUIDS IN FRACTURED MEDIA: DNAPL entry into fractures -- Rates of DNAPL migration through fractures -- Residual and pooled DNAPL -- DNAPL migration through fracture networks -- Height of DNAPL in a well -- THE EFFECTS OF MOLECULAR DIFFUSION ON DNAPL BEHAVIOR IN FRACTURED POROUS MEDIA: DNAPL persistance in fractures -- Implications for DNAPL disappearance from fractures -- Dissolved phase transport in fractured porous media -- DIAGNOSIS AND ASSESSMENT OF DNAPL SITES: Genearl site assessment -- Determining the presence of DNAPL based on feild observations -- Soil gas surveys -- Chemical analysis of soil and rock -- Character of dissolved plumes -- CONCEPTS FOR THE REMEDIATION OF SITES CONTAMINATED WITH DENSE NON AQUEOUS PHASE LIQUIDS: Characteristics of DNAPL sites -- Remediation goals -- Low permeability enclosures -- Pump and treat -- Source zone restoration.