---

This serves as a comprehensive source for the advancements and contributions made in environmental transformation and transport modeling in general and the associated health risk assessment topics in particular.

---

Environmental Modeling and Health Risk Analysis (ACTS/RISK) The purpose of this book is to provide the reader with an integrated perspective on several ?elds. First, it discusses the ?elds of environmental modeling in general and multimedia (the term "multimedia" is used throughout the text to indicate that environmental transformation and transport processes are discussed in association with three environmental media: air, groundwater and surface water pathways) environmental transformation and transport processes in particular; it also provides a detailed description of numerous mechanistic models that are used in these ?elds. Second, this book presents a review of the topics of exposure and health risk analysis. The Analytical Contaminant Transport Analysis System (ACTS) and Health RISK Analysis (RISK) software tools are an integral part of the book and provide computational platforms for all the models discussed herein. The most recent versions of these two software tools can be downloaded from the publisher´s web site. The author recommends registering the software on the web download page so that users can receive updates about newer versions of the software.

---

1. Introduction
2. Principles of Environmental Modeling
3. Conservation Principles, and Environmental Transformation and Transport
4. Air Pathway Analysis
5. Groundwater Pathway Analysis
6. Surface Water Pathway Analysis
7. Uncertainty and Variability Analysis
8. Health Risk Analysis
9. Application: Pesticide Transport in Shallow Groundwater and Environmental Risk Assessment
APPENDIX A. Definitions of Acronyms and Abbreviations
APPENDIX B. Environmental Modeling and Exposure Analysis Terms
APPENDIX C. Definitions and Operations of the ACTS/RISK Software
APPENDIX D. MCL levels of contaminants
APPENDIX E. Conversion tables and Properties of Water

---