Delineation of Industrially-Affected Groundwater Seepage to a River

Project: A nitrate plume had been identified in groundwater, migrating off-site via a gravel paleo-channel, towards a major river in Calgary, AB. Regulators were involved and had expressed concerns regarding potential contaminant discharge to the river.

Services: Installed temporary, direct-push piezometers at the river’s edge to collect shallow groundwater samples during low river stage. Measured groundwater heads against river level to assess for groundwater discharge. Field work was completed discretely within public recreational areas adjacent to a residential subdivision, after obtaining the necessary permits. Field data collected demonstrated a narrow zone of groundwater discharge affected by nitrate. The presence of a golf course between the client’s site and the discharge location complicated the appraisal of responsibility for the nitrate impacts.