Overview of environmental expert systems / Judith M. Hushon -- Success factors for expert systems / Dan Yurman -- Verification and validation of environmental expert systems / Mark Stunder -- Neural networks and environmental applications / Joseph Schmuller -- Expert systems to support environmental sampling, analysis, and data validation / Ramon A. Olivero and David W. Bottrell -- An intelligent quality assurance planner for environmental data : functional requirements / Nitin Pandit, John Mateo, and William Coakley -- An expert system for prediction of aquatic toxicity of contaminants / James P. Hickey [and others] -- A citizen's helper for chemical information / W. James Hadden, Jr. -- An expert system to diagnose performance limiting factors at publicly owned treatment works / Linda Berkman, Mark Lennon, and Keith Law -- The activated sludge advisor prototype / Joseph Schmuller and Michael R. Morlino -- Multidomain expert systems for hazardous waste site investigations / H.Y. Fang, G.M. Mikroudis, and S. Pamukcu -- The cost of remedial action model : expert system applications / Marie T. Chenu and Jacqueline A. Crenca -- Computerized system for performing risk assessments for chemical constituents of hazardous waste / John L. Schaum [and others] -- Remedial action priority and multimedia environmental pollutant assessment systems / J.G. Droppo, Jr. and B.L. Hoopes -- The Defense Priority Model for Department of Defense remedial site ranking / Judith M. Hushon -- The future of expert systems in the Environmental Protection Agency / Daniel Greathouse and James Decker.