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.

Underground Storage Tanks (USTs)

Seminar Publication: Site Characterization for Subsurface Remediation

November 1991. EPA/625/4-91/026

Site characterization of contaminated sites has become an increasingly complex process as a result of rapid developments in (1) methods for observing the physical, chemical, and biological characteristics of the subsurface, and (2) methods for remediation of soil and ground water. Consideration of the possible methods that may be used to clean up contaminated soils or ground water early in the site characterization process can ensure that data collected are appropriate and possibly reduce the time it takes to initiate clean-up efforts. This seminar publication provides a comprehensive approach to site characterization for subsurface remediation. 

For assistance with accessibility for the PDF, please email Sharon Fredericks (

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