The report summarizes the ground-water monitoring program implemented at the Love Canal disposal site in Niagara Falls, New York. This study, which was part of a much larger investigation of the site, was aimed at describing the area's geology and hydrogeology, and identifying potential barriers to, and routes of, contaminant transport. Analyses of the geologic information collected during the study indicate that swales, sandy zones, and perhaps dehydration cracks in the clays are potentially important routes of contaminant transport in the overburden. Vertical fractures and bedding plane separations are potentially important routes in the bedrock.