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2010 Exponent Environmental Chemicals Webinar Series No. 5

Solvents: Hot Topics in Risk and Remediation

Chlorinated and certain non-chlorinated solvents are among the most frequently encountered contaminants requiring remediation in the United States. Common solvents such as TCE, PCE, chloroform, and benzene are in the news because guidelines and standards are becoming more stringent. These lower standards have re-opened Superfund sites during EPA’s 5-year review cycle and have increased public concern. In many cases, these standards are well below typical background concentrations making compliance infeasible and increasing the importance of adequate background data and understanding the source or sources of contamination. Newer forensic techniques including age dating and isotopic analyses have evolved that help more accurately identify source(s) of solvent contamination.

Although a repertoire of successful groundwater remedial techniques for solvents have been developed, failures have occurred and have been the subject of litigation.  Even proven remedial technologies have failed because of inadequate understanding of site conditions, application of a technology not understood by the designers, and/or an insufficient standard of care.

In this webinar, Exponent practitioners will present an overview of the scientific debate behind the more stringent criteria, newer forensic techniques for source identification and apportionment, standard of care for designing and implementing remediation, and case studies of remediation failures. 

Speakers:

Gary L. Brugger, P.E.
Senior Managing Engineer

Farrukh Mohsen, Ph.D., P.E.
Senior Managing Engineer

Lisa J. Yost, M.P.H., DABT
Senior Managing Scientist

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There is no cost to attend this webinar.