Rural Residence Heating Oil Storage Tank

Case Study - PHCs



Overview

At a rural residence, petroleum hydrocarbons leaked from a heating oil storage tank into the underlying groundwater, rock and soil. The release created potential health and ecological risks for the residents and local environment. Soil concentrations included:

  • PHC (maximum concentration of > 1,110 μg/g)

Groundwater concentrations ranged up to:

  • PHC (maximum concentration of > 64,200 μg/L)

Scope of Work

  • Acquired all relevant permits to complete the remediation program
  • Implemented a pilot-scale test to determine areas of influence and injection rates
  • Designed and optimized an in- program to maximize treatment efficiencies
  • Implemented a program that minimized capital expenditures and infrastructure

The Vertex Approach

  • Chemical oxidation and enhanced aerobic biodegradation
  • Multiple applications
    • Under floor slab and footing
    • Into overburden and fractured rock
  • Injection of chemical oxidant
    • > 845 kg of RegenOx
  • Injections completed using:
    • Horizontal & vertical wells

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Outcome

  • Over 3,500 L of oxidant solution delivered to impacted areas – on going
  • Residents able to remain in house
  • Structure not affected
  • RegenOx solution effectively distributed throughout impacted areas
  • Significant reductions for:
    • BTEX
    • F1 & F2
    • F3 & F4

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