Client Spotlight: Arun Wahi

Arun Wahi, Senior Hydrogeologist with INTERA Inc., a leading international geosciences and engineering consulting firm, specializes in contaminant fate and transport analyses of organic and inorganic contaminants and radionuclides, including numerical models of vadose zone and groundwater flow and transport. He shares, “I enjoy the challenges associated with mathematics and learning new chemistry of emerging contaminants or forensic techniques, but the most rewarding part of my job is influencing concrete actions that protect human health and the environment.” Learn more in our client spotlight.

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Combined Remedy Reduces Chlorinated Solvents to Achieve Closure Status with Florida DEP

This case study reviews the site of a chlorinated solvent spill as part of former dry cleaner operations at a retail shopping center in St. Petersburg, Florida. AECOM®, a global environmental consulting firm, was engaged to develop a solution for the site. The application called for an in situ groundwater treatment of low-concentration chlorinated volatile organic compounds (CVOCs). AECOM enlisted REGENESIS to design and implement an innovative sorption-enhanced reductive dechlorination (ERD) bioremediation approach for treating the CVOC contaminants. The results of the effort led to the Florida Department of Environmental Protection issuing a Site Rehabilitation Completion Order, releasing the property owner from further obligation to conduct remediation at the project site (i.e., site regulatory closure).

 

Turn Polluted Aquifers into Purifying Filters with PlumeStop

PlumeStop Liquid Activated Carbon is a break-through groundwater remediation technology that reduces dissolved phase contaminant plumes in days. Composed of extremely fine particles of activated carbon (1‐2μm) suspended in water through a proprietary dispersion chemistry, PlumeStop flows into the subsurface at low pressure and achieves consistent, reliable distribution – a capability unlike any other form of activated carbon used for groundwater remediation today.

Low-cost Bioremediation of Chlorinated Solvents

HRC is an engineered, hydrogen release compound designed specifically for enhanced, in situ anaerobic bioremediation of chlorinated compounds in groundwater or highly saturated soils. HRC enables enhanced anaerobic biodegradation by adding hydrogen (an electron donor) to groundwater and/or soil to increase the number and vitality of indigenous microorganisms able to perform the naturally occurring process of enhanced reductive dechlorination. Due to its capability of being applied via permanent wells, direct-push, and excavations, this reagent allows for clean, low-cost, non-disruptive application.

Remediation of Chlorinated Solvents with PlumeStop Liquid Activated Carbon

PlumeStop technology can be applied to inhibit spreading of contaminant plumes, to protect sensitive receptors, or to prevent contaminant migration across property boundaries. It is also an effective tool for control and treatment of groundwater contamination associated with low-permeability porous formations and matrix back-diffusion, promoting diffusion out of the immobile porosity while preventing groundwater impact, and for treating sites with very low contaminant concentrations. Once in place, PlumeStop is expected to last for decades with minimal impact on aquifer oxidation-reduction potential, permeability and geochemistry.

Webinar Now Available: A State Regulator’s Perspective on PFAS in Minnesota

In this webinar we were pleased to have as a special guest speaker Ginny Yingling, Senior Hydrogeologist at Minnesota Department of Health. Her presentation shared a state regulator’s perspective on PFAS in Minnesota. She was joined by Scott Wilson, President & CEO at REGENESIS, who discussed the extent to which colloidal activated carbon has been accepted by the remediation industry as a low-cost method of eliminating PFAS risk.

Questions?

REGENESIS has remediation experts based worldwide to assist you in your brownfield site cleanup. As the technology leader in advanced bioremediation solutions, we can help ensure success on your next remediation project. Use the map on our website to find your regional REGENESIS contact today.