1.My name is Zubair Saleem and I work for the US EPA, Office of Solid Waste.
	2.  I am going to talk about the enhancement of our Industrial Waste Evaluation Model (IWEM) which is used for evaluation of Land-based management units (Landfills, Waste Piles, Land Application Units, and Surface Impoundments.)
	3.With the increasing demand for the utilization of recycled materials for highway projects, the IWEM has been enhanced for the evaluation of Roadways as a source term in the IWEM, in addition to the existing four sources.  This enhanced IWEM is for Tier 2 analyses. For Tier 2 analyses, user provides information on selected key parameters and the model predicts the potential status of the materials used in the Roadway as compared to known health benchmarks.
	4.As some of you already know that the IWEM is based on the EPA’s Composite Model for Leachate Migration with Transformation Products (EPACMTP).   The enhanced IWEM (Ver. 2.0) was developed by EPA through a contract with RTI and the HGL as the subcontractor for subsurface modeling.  We would like to acknowledge the contributions of many individuals, primarily: Dr. Steve Beaulieu of RTI, Dr. Dua Guvanases and Ted Lillys  of HGL.  Ted is our programming expert on this project. We will be demonstrating the use of IWEM Ver 2.0 and Ted available here at the Conference to demonstrate the use of the Model. The work has been supported by Office Director, and heads of Municipal & Industrial Waste Division and the Economics, Methods, and Risk Analysis Division. Mr. John Sager of MISWD provides regulatory support as well as the support necessary for understanding the needs of the user community along with many staff persons from the MISW.
	5. Let me help you understand how the IWEM for Roadways works. It is primarily a quick screening designed to be conservatively protective. For a detailed specific analysiis, one should use a more sophisticated and complex model.