9/28/17 DINNER MEETING ANNOUNCEMENT

DINNER MEETING ANNOUNCEMENT

“In-Situ Treatment of Low Permeability Soils”
Thursday, September 28, 2017
At the Clarion Hotel in Somerset, New Jersey
 
Presented by
 
Dr. Dan Bryant, Ph.D
In-Situ Remediation Practice Leader 
Woodard & Curran

Additional speaker

Richard Meserole

ABSTRACT
In-situ remediation of low-permeability (silt and clay) aquifers presents significant challenges due in part to the difficulty of effectively injecting liquid reagents commonly used for bioremediation, chemical oxidation, and other remedies. Controlled-jet injection methods have been adapted to inject solids into low-permeability formations. The injected reagents take the form of thin (roughly 0.5 to 1 inch thick) ovate lenses, with radii on the order of 15 to 25 feet, in silt and clay formations. The emplaced reagents typically have a relatively high permeability (hydraulic conductivity in the 10^-2 cm/sec range) in contrast to the formation (10^-4 to 10^-7 cm/sec range), thus advecting groundwater in low-permeability formations is deflected into the emplaced treatment reagents for contact and remediation. Slightly soluble reagents such as potassium persulfate or potassium permanganate will also vertically diffuse from the emplaced lens to directly treat soil between injection intervals. An exciting new approach with this technology is to utilize solid potassium persulfate with a metal base as the reagent. This offers sustained production of strong oxidants (sulfate radicals and hydroxyl radicals) and nucleophiles/reductants (superoxide radicals), to address a much wider range of contaminants than is possible with other solid reagents such as ZVI or potassium permanganate. Applications for this approach can include direct treatment of source areas, barrier treatment designs for large plume areas or for inaccessible sources, and flexible reagent chemistries that can be adapted to a wide range of organic compounds (such as chlorinated solvents, petroleum hydrocarbons, PAHs) and inorganic compounds (such as certain metals and anions).

BIOGRAPHY
Dr. Dan Bryant, Ph.D., is In-Situ Remediation Practice Leader for Woodard & Curran in East Windsor, New Jersey. Dan has worked in the field of soil and groundwater remediation (particularly in-situ chemical and biological remediation methods) since 1997. Dan’s project experience ranges from small gas stations and dry cleaners, to multi-acre DNAPL sites, in overburden and bedrock. Dan has also undertaken extensive research and development efforts for new remedial technologies, and holds three patents related to biological and chemical in-situ treatment technologies of organic and inorganic contaminants in soil and groundwater. Dan earned bachelor's and master’s degrees in geology from the University of Florida in Gainesville, Florida in 1988 and 1990, respectively, and a Ph.D. in geology from Columbia University in New York City, New York, in 1995.