by Denis LeBlanc
Preface
CHAPTER A--DESCRIPTION OF THE HAZARDOUS-WASTE RESEARCH SITE
Abstract
Introduction
Description of study area
Disposal of treated sewage
Hydrologic system
Hydrogeology
Hydrology
References cited
CHAPTER B--DIGITAL MODELING OF SOLUTE TRANSPORT IN A PLUME OF SEWAGE-CONTAMINATED GROUND WATER
Abstract
Introduction
Description of the sewage plume
Digital model of the plume
Description
Simplifying assumptions
Finite-difference grid
Parameter estimation
Hydraulic conductivity
Porosity
Dispersivity
Data requirements
Aquifer boundaries
Aquifer properties
Inflow and outflow
Calibration
Simulation of solute transport
Model application
Input data and assumption
Simulated plume
Differences between observed and computed paths
Two-dimensional simulation of a three-dimensional plume
Interaction of the plume and Ashumet Pond
Sensitivity to dispersivity
Predictive capability of the model
Constant and continuous source of solute
Changes in concentrations of solutes in the source
Summary and conclusions
References cited
CHAPTER C--SEWAGE CONTAMINANTS IN GROUND WATER
Abstract
Introduction
Experimental procedures
Distribution and movement of inorganic solutes
Specific conductance
Major cations
Major anions
Trace elements
Nutrients
Distribution and movement of organic solutes
Dissolved organic carbon
Detergents
Volatile organic compounds
Conclusions
References cited
CHAPTER D--CLOSED-LOOP STRIPPING COMBINED WITH CAPILLARY GAS CHROMATOGRAPHY/MASS SPECTROMETRY ANALYSIS TO DEFINE A SEMI-VOLATILE ORGANIC CONTAMINANT PLUME
Abstract
Introduction
Experimental procedures
Sample collection
Closed-loop stripping
Standards and blanks
Gas chromatography/mass spectrometry analysis
Quantification
Results
Conclusions
References cited
CHAPTER E--EVIDENCE OF MICROBIAL PROCESSES IN SEWAGE-CONTAMINATED GROUND WATER
Abstract
Introduction
Experimental procedures
Analysis of inorganic constituents
Dissolved organic carbon
Enumeration of viable cells
Evidence of microbial processes
Temperature, pH, and specific conductance
Dissolved oxygen
Nitrate, ammonia, and phosphate
Plate counts
Dissolved organic carbon
Coliforms
Summary and conclusions
References cited
CHAPTER F--MICROBIAL DISTRIBUTION AND HETEROTROPHIC UPTAKE IN A SEWAGE PLUME
Abstract
Introduction
Experimental procedures
Collection of samples
Enumeration of bacteria
Microbial distribution and heterotrophic uptake
Microbial distribution
Heterotrophic uptake
Relation of bacteria to proximity to contamination source
Summary
References cited
CHAPTER G--PRELIMINARY STUDY OF DENITRIFICATION IN A PLUME OF SEWAGE CONTAMINATED GROUND WATER
Abstract
Introduction
Overview of denitrification
Experimental procedures
Sample collection
Denitrification assay
Results and discussion
Summary and conclusions
References cited
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