Four sites where stabilized industrial wastes had been disposed were examined to determine the effects of stabilized wastes on surrounding soils and groundwater. All areas selected for study were in the humid eastern or southern United States where rainfall was sufficient to produce abundant leachate. The sludges had all been fixed using the same proprietory process involving addition of cementitious materials to form a stable, soil-like product. Two of the industrial waste sites contained auto assembly (metal finishing) wastes, one site contained electroplating wastes and the fourth site contained refinery sludges. A randomization procedure was used to determine if consistent significant differences existed between samples from under and outside the waste disposal area.