Iron and manganese were found at concentrations above comparison values. The source of these metals may have been the residence's supply lines because those metals were not found in similar concentrations in the other well sampled. No VOCs were detected, and only a few metals were found, none above comparison values. Well G202 was retested in 1996, and again no concentrations were found above comparison values. Many sources of metals and inorganic chemicals exist in Illinois.
Metals are in fertilizers, sewage sludge, soils, groundwater, and from water distribution systems.
Site-related metal contamination may be related to automobiles, tires, appliances, spent oils, or ammunition wastes. This sample was mixed and split in the field, but results are inconsistent between classes of contamination. Because the salvage yard has been a collection point for old cars for many years, petroleum-based fluids likely have contaminated surface and subsurface soils in the area. Very little is known about the threat to groundwater and surface water because of the activities associated with auto salvage. The background soil sample for the site was collected on the site near a cyclone fence and the auto salvage yard, so this may not be a true background sample.