A Remedy to Achieve Site Closure: Fast and Permanent Remedy Replaces Pump and Treat System

Date: Wednesday, March 30th, 2022
Time: 11am pacific / 2pm eastern

In this webinar we are pleased to have as a special guest speaker Lori E. Riker, P.E., Sr. Project Manager at Benchmark Civil/Environmental Engineering & Geology. Her presentation will discuss adapting a remedy to achieve site closure for a challenging, century-old, New York Brownfield site. She will be joined by Alana Miller, Northeast District Technical Manager at REGENESIS, who will share how in-situ technologies were adapted for a remedial solution at this site.

Highlights of this free webinar:

At a former metals manufacturing facility in Western New York, a narrow CVOC plume was migrating off-site. Over 30 million gallons of CVOC-impacted groundwater were treated between 2004 and 2018 using a pump-and-treat system. Since the site owner was interested in implementing a fast and permanent remedy, an in situ application of PlumeStop colloidal activated carbon (with electron donor, and bioaugmentation substrates) was completed in 2017 by REGENESIS Remediation Services (RRS). Performance monitoring was conducted through June 2021. Following the application, CVOC concentrations were reduced from as high as 500 micrograms per liter (µg/L) at baseline to below one ug/L in the source area and downgradient performance monitoring wells for six consecutive sampling events. Based on these results, the pump-and-treat system was decommissioned, and the site was granted closure by the NYSDEC in August 2021, after nearly 20 years of investigation and remediation.