Liesch Associates, Inc. was retained by the Amherst H. Wilder Foundation (Wilder) to perform investigation and cleanup work at one of its properties. The property is occupied by an 11-story high-rise building for low income housing. The building was occupied by residents throughout the investigation and cleanup work. As part of an effort to sell the property, a potential buyer notified Wilder of potential contamination issues associated with a former dump. A Phase I ESA prepared by the buyer's environmental consultant identified that the property was located within the boundaries of a reported dump site used by the City of St. Paul in the 1940s through the 1960s. Upon completion of Phase II Investigation Activities, contamination of RCRA metals and polynuclear aromatic hydrocarbons was discovered across the property at levels above residential standards. Liesch worked with Wilder and the Minnesota Pollution Control Agency to develop a cleanup plan protective of human health and the environment for the continued residential use of the property. As part of this work, Liesch successfully worked with Wilder and the residents of the high-rise building to complete the investigation and cleanup activities. In an effort to keep residents up to speed with these activities, Liesch took part in regular meetings to summarize progress and answer questions from the residents. The project was completed without significant complaints from the residents.