Dry Cleaning Facility

Case Study - PCE



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

  • Screen Shot 2015-08-17 at 3.21.48 PMAcquired 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

  • Screen Shot 2015-08-17 at 3.22.01 PMOver 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)

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