f UNDERSTANDING GEOLOGIC CONTROLS ON GROUNDWATER USING BOREHOLE GEOPHYSICS EXAMPLE: LANDFILL IN EAST-CENTRAL NEW YORK

Borehole geophysical logging of five bedrock wells was performed as part of a bedrock characterization study in support of groundwater investigations near a landfill in east-central New York. The investigation area is situated within an upland valley. Although the regional hydraulic gradient was generally understood, factors controlling variations in the groundwater flow patterns and potential vertical and horizontal pathways for landfill leachate around the vicinity were not. Contaminants of primary concern within the areas of investigation include VOCs in groundwater at concentrations above drinking water standards.