The management of contaminated land and groundwater is a universal problem among industrialized countries, requiring the use of existing, emerging, innovative, and cost-effective technologies. This document reports on the fourth meeting of the Phase III Pilot Study on the Evaluation of Demonstrated and Emerging Technologies for the Treatment and Clean Up of Contaminated Land and Groundwater. The Phase III study, which concluded in 2002, focused on the technologies for treating contaminated land and groundwater. The study addressed issues of sustainability, environmental merit, and cost-effectiveness, with continued emphasis on emerging remediation technologies. The objectives of the study were to critically evaluate technologies, promote the appropriate use of technologies, use information technology systems to disseminate the products, and to foster innovative thinking in the area of contaminated land. The Phase III Mission Statement is provided at the end of this report.