(NOTE: Limitation of space allows only a selection of papers to be mentioned) Foreward. I. POLICY AND LEGISLATION. Pollution prevention - U.S. Environmental Policy (A.W. Lindsey and B.J. Campbell). Systematic leaching behaviour of trace elements from construction materials and waste materials (H.A. van der Sloot). Waste Policy related to the National Environmental Policy Plan (G. Delsman). Management of wastes resulting from building activities in the Federal Republic of Germany (J. Kuehn). The U.S. EPA program for evaluation of treatment and utilization technologies for municipal waste combustion residues (C.C. Wiles, D.S. Kosson and R. Holmes). The use of waste material in civil engineering: AVI slag can replace gravel in concrete production (D. Stoelhorst). Management of residues from coal utilization: an overview of FBC and IGCC by-products (L.B. Clarke and I.M. Smith). Applications of waste materials at infrastructural works (R. van Winden, J. Th. van der Zwan and J. Zeilmaker). II. METHODOLOGY OF ENVIRONMENTAL IMPACT ASSESSMENT. A comparison of five solidification/stabilization processes for treatment of municipal waste combustion residues - physical testing (T.T. Holmes, D.S. Kosson and C.C. Wiles). Leaching potential of municipal waste incinerators bottom ash as a function of particle size distribution (J.A. Stegemann and J. Schneider). Composition and leaching characteristics of road construction materials (J.J. van Houdt, E.J. Wolf and R.F. Duzijn). Municipal solid waste combustion ash as an aggregate substitute in asphaltic concrete (D.L. Gress, X. Zhang, S. Tarr, I. Pazienza and T.T. Eighmy). Incineration slag in road construction (J.A.M. Mank, J. Brulot and W.H. Janssen van de Laak). Utilization of incinerator bottom ash: legal, environmental and engineering aspects (J. Hartlen and T. Lundgren). Recycling of construction waste (M.M. O'Mahony and G.W.E. Milligan). Chemical processes at a Redox/pH interface arising from the use of steel slag in the aquatic environment (R.N.J. Comans, H.A. van der Sloot, D. Hoede and P.A. Bonouvrie). Standardization of terminology, characterization methods, acceptance procedures and leaching tests for waste materials (M.J.A. van den Berg, P.M. Eckhart and W.P. Bijl). French approach towards the evaluation of monolithic and solidified waste: development of a new leaching procedure (J. Mehu, Y. Perrodin, B. Sarrazin and J. Veron). The Netherlands leaching database: a useful tool for product quality control, environmental certification and evaluation of leaching test results (G.J. de Groot). Modelling of interactions at waste-soil interfaces (D.E. Hockley and H.A. van der Sloot). Long term environmental impact by use of waste materials: an assessment system (M. van Herwijnen, P.C. Koppert and A.A. Olsthoorn). Leaching tests and the influence of oxidation-reduction processes (C. Zevenbergen and W.F. Hoppe). Potential for reuse of lead-contaminated urban soils (H.A. van der Sloot, J. Wijkstra and J.