Underground Storage Tank (UST) Groundwater Remediation Project
The Challenge:
During the removal of a UST in 1998, a petroleum release was discovered. Subsequent site assessments, groundwater monitoring, and aggressive fluid vapor and recovery (AFVR) events were performed from 1998 to 2022. Given the hydrogeological conditions and persistent high dissolved concentrations of petroleum hydrocarbons, it was evident that an alternative approach to achieve regulatory closure would be necessary.
Our Solution:
EnviroSouth developed an In-situ chemical oxidation (ISCO) remediation strategy which utilized sodium persulfate; a chemical developed by Regenesis. Approximately 50,000 pounds of sodium persulfate was injected into the aquifer to reduce petroleum concentrations to below site-specific target levels. This solution exceeded remedial action goals and officially closed the 25 year old release within two years of remedial implementation.
What's Unique:
Previously, mass abatement of petroleum hydrocarbons was limited to methods such as monitored natural attenuation and AFVR. This facility presented a unique opportunity to act as a test case for the newly adopted, state funded, targeted scope corrective action approach. Since the launch of this program, EnviroSouth has applied similar approaches to other UST release sites achieving similar results.
Learn more about this project from an in depth case study located on our Resources Tab.
Services We Provided:
- Phase I Environmental Site Assessment (ESA)
- Phase II Environmental Site Assessment (ESA)
- Vapor Intrusion Evaluation
- Tier II Site Evaluation
- Soil Assessment
- Groundwater Monitoring
- In-situ Chemical Oxidation via Direct Push Injection
- Well Abandonment
- No-Further-Action (NFA)