REGENESIS recently updated our online Project Profile library. From brownfields to Department of Defense pay-for-performance sites, the Project Profile library highlights our most recent remediation projects. Below are a few examples of our latest Project Profiles. To view the entire library, click here.
The site, a former cordage and twine factory in Ohio, was closed in 2004 after 125 years of operation. The city and developer secured $1.98 million in brownfields funding through the Clean Ohio Revitalization Fund (CORF). These funds were secured for demolition and remediation activities at the site included but not limited to asbestos removal, underground storage tank removal, and contaminated soil excavation and demolition activities.
Chlorinated Solvents in Soil, Gas, and Groundwater Remediated at Former Manufacturing Facility
The site, a former industrial magnet manufacturing facility in Ohio, received a $2.34 million Clean Ohio Revitalization Fund grant through the Ohio Department of Development in 2011. Site investigation activities identified chlorinated VOCs in groundwater and vapors above the state regulatory limits. Using a combined approach of ERD with vapor mitigation addressed the immediate risk of vapor intrusion and the long-term risk of groundwater impacts. By implementing this strategy, the site was allowed to be redeveloped as an apartment complex roughly 6 months following the groundwater treatment. “No Further Action” status and covenant not to sue letter was granted in 2013. The site currently operates as a residential apartment complex.
A former manufacturing facility in New Jersey was contaminated with 1,1-DCE, 1,1-DCA, and 1,4-dioxane in the fractured bedrock aquifer. Previous pump and treat activities were successful at containing and reducing 1,4-dioxane concentrations; however, off-site transportation and disposal of recovery water was expensive. PersulfOx ISCO was selected as a lower-cost alternative that could combat 1,4-dioxane contamination in situ.
Redeveloped DOD Site Treated with Turn-Key ISCO Remediation
Regenesis Remediation Services (RRS) was contracted to remediate this former DOD facility. Perchlorethene (PCE) levels of 400 ppb were treated with in situ chemical oxidation (ISCO) employing PersulfOx Catalyzed Persulfate technology. The application included two injection events which involved working within an active parking area of an operating business. The original site design included utilizing direct-push injections, but RRS readjusted the plan in the field after product surfacing was observed in one area that was under construction. Despite the redesign, the application was completed ahead of schedule and under budget.
The site is located in the South Carolina Coastal Plain and is a former light industrial facility. Baseline concentrations of total chlorinated VOCs – which included tetrachloroethene (PCE) and daughter products plus 1,1-dichloroethene (DCE) – were as high as 2,000 ug/L in the near-source groundwater. The treatment involved sequential anaerobic and aerobic treatment using HRC® and ORC® Advanced.