Business Title: Technical Director, SMAART Program

Contact Information:
URS Corp.
122 S. Michigan Ave.
Suite 1920
Chicago, IL 60603
Phone: 312 697 7211
Fax: 312 939 4198
E-mail: greg_smith@URS.com

Biography: Mr. Smith is a licensed professional engineer in Alberta, Canada and a licensed professional geologist in Illinois and North Carolina, with 20 years professional experience in soil and groundwater remediation, expert witness testimony, isotopic evaluations for fate and transport characterization, and regulatory negotiations. The projects worked on have ranged across the United States, and internationally in Canada, Guam, Poland, Germany and France. Mr. Smith is the principal author of a patent for the simultaneous use of steam and enhanced biodegradation for the in situ remediation of soil and groundwater. This techniques has been applied at two location in Illinois, with the first application receiving a no further remediation letter from Illinois EPA, believed to be the first successful in situ remediation of chlorinated solvent in the form of a dense non-aqueous phase liquid (DNAPL) from below the water table. This site has achieved Illinois Class II groundwater standards, requiring no further monitoring, and allowing site redevelopment to occur. Mr. Smith has also used such innovative techniques as six phase electrical resistive heating for the remediation of chlorinated solvent DNAPL, and has received a no further remediation letter from Illinois EPA for this work. Other remediation methods that Mr. Smith has utilized include innovative techniques such as in situ oxidation, redox manipulation, natural attenuation, bioslurping, and bioventing, as well as the more conventional techniques, such as pump and treat with air stripping, and soil vapor extraction.

Stable isotopes of strontium, chlorine and carbon are beginning to find application in the area of hazardous waste investigation and remediation. Working with the University of Southern California, Los Angeles, Mr. Smith has used strontium isotopes as tracers to define migration pathways and

delineate co-mingled plumes in California and Missouri. Working with Argonne National Laboratory, Mr. Smith has used stable isotopes of chlorine and carbon at locations in Illinois, Missouri and South Carolina to define the fate of chlorinated aliphatic compounds, as well as track the removal of DNAPL using thermal remediation methods.

Mr. Smith has authored many papers and made presentations at conferences dealing with aspects of DNAPL remediation, cyanide remediation, in situ biodegradation, and the use of stable isotopes.