Under the Superfund Innovative Technology Evaluation (SITE) Program, the U.S. Environmental Protection Agency (U.S. EPA) is seeking to foster the further development of technologies that have been successfully tested at bench-scale and are now ready for pilot-scale testing, prior to field- or full-scale demonstration. The goal is to ensure that permanent, cost-effective technologies will be ready for field demonstration, thereby increasing the number of viable alternatives available for use in Superfund removal and remedial actions. Under this program, the U.S. EPA can offer technology developers financial assistance of up to $150,000 per year, for up to two years. The program is now initiating its fourth solicitation (E04) with two projects form the E01 solicitation completed; five more E01 projects are scheduled for completion by September 30, 1990; eight E02 projects are starting their second year; and 16 projects were selected from the third (E03) solicitation. The fourth Emerging Technology Program Solicitation is open to the receipt of new proposals from July 6, 1990, through September 7, 1990. The purpose of the article is to provide the reader with (1) an introduction to the Emerging Technology Program (ETP); (2) an understanding of how the Program operates; (3) a summary of those technologies currently being tested and evaluated under the Program; and (4) information on how to apply to the Program.