An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.


Process Based Investigation Guide

The purpose is to introduce and define the concept of "process-based" investigations, and provide a "road map" to planning and conducting these types of investigations

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.