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SERDP and ESTCP have launched a webinar series to promote the transfer of innovative, cost-effective and sustainable solutions developed through projects funded in five program areas. The webinar series targets Department of Defense and Department of Energy practitioners, the regulatory community and environmental researchers with the goal of providing cutting edge and practical information that is easily accessible at no cost.



Applying Compound-Specific Isotope Analysis to Document Contaminant Degradation and Distinguish Sources by Dr. Paul Hatzinger

Compound-specific isotope analysis (CSIA) is increasingly applied as a tool to detect, understand, and quantify biological and abiotic degradation of contaminants, including chlorinated solvents, propellants, explosives, and fuel additives, among others. An important feature of CSIA is that it can allow degradative losses of contaminants to be distinguished from those caused by non-destructive processes such as dilution, dispersion, and sorption. In some instances, dominant degradative mechanisms can also be determined using CSIA. This presentation will cover the basics of stable isotope analysis and provide theoretical and real-world examples of how CSIA data can be used to document degradation of a variety of contaminants. A second main area of application for CSIA is contaminant forensics. This approach is relevant for materials that have both natural and synthetic sources (e.g., perchlorate and nitrate), as well as synthetic chemicals that have different manufacturing processes or have experienced different levels of degradation over time. The presentation will examine the current state-of-the art in forensic evaluation of contaminants, with a specific focus on perchlorate and distinguishing sources of chlorinated solvents during vapor intrusion studies.


Speaker Biography
Dr. Paul Hatzinger

Dr. Paul Hatzinger is the director of the Biotechnology Development and Applications Group at APTIM. Dr. Hatzinger has more than 25 years of experience in contaminant biodegradation, bioremediation, and forensics. His research group has been instrumental in the development and field application of new remedial approaches for several contaminants of concern to the Department of Defense, including perchlorate, 1,2-dibromoethane (EDB), N-nitrosodimethylamine (NDMA), methyl tertiary butyl ether (MTBE), and nitramine explosives (RDX, HMX). Dr. Hatzinger has also conducted extensive research on the application of CSIA to determine the sources and fate of perchlorate in the environment, and he maintains a strong interest in furthering the use of stable isotope technologies for environmental applications. He has authored more than 80 peer-reviewed papers and book chapters and has served as the principal investigator on research grants from the National Science Foundation (NSF), Environmental Protection Agency (EPA), Department of Energy (DOE), SERDP, ESTCP, US Navy, Air Force Civil Engineer Center (AFCEC), and US