Overview
Groundwater impacted with chlorinated ethenes were flowing from this dry cleaning facility at concentrations greater than the applicable Standards. The concentrations of the compounds of concern were:
- PCE (maximum concentration of 223 μg/L), and
- TCE (maximum concentration of 0.9 μg/L)
Vertex was requested to implement a cost-effective program to mitigate the impacts flowing from the Site that was passive and required little to no maintenance and operation.
Scope of Work
- Acquired all relevant permits to complete the remediation program
- Designed and optimized an in- program to maximize treatment efficiencies
- Conducted a pilot-scale program to determine injection pressures needed to create an adequate area of influence in the clayey overburden situ
- Implemented a full-scale program using direct push techniques and high pressure injection
The Vertex Approach
- In-Situ Chemical Oxidation
- Multiply applications
- Source reduction
- Plume elimination
- Injection of chemical oxidant
- 440 kg of permanganate
- Injections completed using:
- Vertical wells
- High pressure (> 150 psi)
Outcome
- Over 30,000 Lof oxidant solution delivered
- Operations not interrupted
- Remediation objectives meant:
- PCE (>75% decrease after 2 injections)
- TCE (>80% decrease after 2 injections)
- cis-1,2-DCE (76% decrease after 2 injections)