Includes listing of modifications and innovations used in risk assessments accepted by the EPA. While beginners can benefit greatly from the papers presented here, this collection finds its best use in the hands of the experienced risk assessor. The papers present modifications of the basic EPA methodology which have been acceptable to regulators at specific sites. 22 peer-reviewed papers cover:

• Site Characterization

• Fate and Transport

• Toxicity, Exposures, and Receptors

• Risk Characterization/Case Studies

• Establishing Cleanup Levels.