Characteristics of Fractures in Crystalline Bedrock Determined by Surface and211 Borehole Geophysical Surveys, Eastern Surplus Superfund Site, Meddybemps, Maine

摘要

Surface and borehole geophysical methods were used to determine fracture211u001eorientation in crystalline bedrock at the Eastern Surplus Superfund Site in 211u001eMeddybemps, Maine. Fracture-orientation information is needed to address concerns 211u001eabout the fate of contaminants in ground water at the site. Azimuthal square-211u001earray resistivity surveys were conducted at 3 locations at the site, borehole-211u001eacoustic televiewer and borehole-video logs were collected in 10 wells, and 211u001esingle-hole directional radar surveys were conducted in 9 wells.