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Industrial Waste Management Evaluation Model (IWEM)

Background Information

In an effort to meet the needs of various stakeholders, the guidance for the ground water pathway uses a tiered approach that is based on modeling the fate and transport of waste constituents through subsurface soils and ground water to a well to produce a liner recommendation (or a recommendation concerning land application) that protects human health and the environment. The successive tiers in the analysis incorporate increasing amount of site-specific data to tailor productive management practices to the particular circumstances at the modeled site:

The IWEM software is designed to support the Tier 1 and Tier 2 analyses. The unique aspect of the IWEM software is that it allows the user to perform Tier 1 and Tier 2 analyses and obtain liner recommendations with minimal data requirements. Users interested in a Tier 3 analysis should consult the Guide for information regarding the selection of an appropriate ground water fate and transport model.

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Download Model Files and User's Guide

For a discussion of the components of IWEM and important concepts necessary to understanding the effective use of the model, see Chapter 7 - Section A of the Guide.

To install and run IWEM, download all of the files below to the same directory and run iwemsetup.exe.

IWEM Installation (EXE) (Executable file, 27.5MB)
(Estimated download times: 56k - 143 min; Cable/ISDN/DSN: 60 min; T1: <3 min. Actual download time may vary depending on other factors including Internet connection quality, computer speed, and network traffic.)

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IWEM User's Guide

Due to the large file size of the IWEM User's Guide, it has been broken into the following separate files:

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.

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IWEM Technical Background Document

Due to the large file size of the IWEM Technical Background Document, it has been broken into the following sections:

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