Using electromagnetic induction techniques to locate and delineate contaminant plumes due to on site wastewater treatment systems and constituent movement away from OSWT systems
Davies, Patrick Jeffrey
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Increasing reliance on OSWT systems in the U.S. for management of household wastes could lead to an increase in groundwater and subsurface soil pollution. This study was conducted to determine if Electromagnetic Induction, a popular geophysical exploration technique, could be used to track and delineate contaminant plumes due to OSWT systems and to assess variability of flow in situ from OSWT system drain field trenches. Ground conductivity data showed little evidence of lateral constituent movement from effluent from OSWT systems. Soil and groundwater samples were taken to groundtruth the ground conductivity data. These samples had low concentrations of constituents confirming the ground conductivity data. Results from ground conductivity and soil and groundwater sampling show little evidence of lateral constituent movement and negligible opportunity for groundwater contamination due to OSWT systems.