Figure 1: Geographical locations of the sampling area from the GSR in Northern Ontario. Sites are grouped based on distance from the smelter 1) Eroded/Disturbed sites: Airport, Wahnapitae Hydro-Dam and Kelly Lake; 2) Stable upland sites: Kingsway, Kukagami and Laurentian; 3) Reference sites: Onaping Falls, Capreol and Hagar.