A geoenvironmental investigation of urban groundwater contamination at Sussex, New Brunswick

摘要

In response to a reported perchloroethylene (PCE) finding of 3.9 $mu$g/L in the Albert Street Well No. 1, the original municipal water supply well in Sussex, New Brunswick, a subsurface groundwater sampling investigation was undertaken in 1996 to delineate the extent and nature of the contamination. As a result of the perchloroethylene contamination, the Municipality of Sussex has discontinued use of the Albert Street Well No. 1 and a nearby Albert Street (standby) Well No. 2 since early 1989.;At Sussex, a lower aquifier serves as the sole source of municipal drinking water supply. The lower aquifier sediments consist of well-sorted, glaciofluvial/ice contact sand and gravel, locally over 10 m thick, confined by underlying till and/or bedrock and an overlying laminated silt-clay glaciomarine middle aquitard unite of variable thickness. The middle aquitard is in turn overlain by the upper aquifier which consists of a coarsening upward sand, and sand and gravel with occasional lenses of clay, silt and diamicton. The upper water table aquifier has a variable thickness of up to 18 m.;A total of 72 groundwater samples were collected from 31 boreholes and 40 permanent monitoring well locations. (Abstract shortened by UMI.).