High-Mass Petroleum Hydrocarbons Treated to Achieve Closure

Case study highlights:

• Injected PersulfOx during three treatment rounds sequenced approximately two months apart
• Toluene reduced by an average of 94% and below the toluene SSTL in all five performance monitoring wells
• Toluene remains below its SSTL following the injection of PersulfOx

A former electric service company upstate of South Carolina reported a release during a UST removal completed at the site in 1988. Aggressive fluid vapor recovery (AFVR) events were completed from 2004 to 2008 and from 2019 to 2020 to address the release, along with groundwater monitoring. Despite these efforts, high concentrations of petroleum hydrocarbons (PHC) remained. Following years of remediation, the final selection and successful application of PersulfOx® effectively reduced high concentrations of toluene in groundwater below the site cleanup goal at an electrical service company upstate of South Carolina. The remediation achieved the site target cleanup objectives and received regulatory closure for the decades-old release incident.