Remediate a Former Fuel Transfer Facility

Case Study - Skimmers



Overview

Vertex staff were retained to remediate a former fuel transfer facility that was impacted by free product petroleum hydrocarbons. The hydrocarbons had a specific gravity less than water (i.e. LNAPL) and was characterized as being a weathered gasoline product with ethanol additives.


Scope of Work

  • Acquired all relevant permits to complete the remediation program
  • Complete a mass balance calculation to estimate volume of mobile and residue free product within subsurface
  • Designed and optimized a free product removal program based on utilizing pneumatic skimmers
  • Aid in the completion of a risk assessment for the site

The Vertex Approach

  • Screen Shot 2015-08-31 at 3.00.03 PMComplete estimation of free product in ground
  • Review water and product level relationship
  • Install pneumatic skimmer array
  • Simulated product distribution and movement using numerical methods
  • Optimized placement of skimmers depending on seasonal fluctuations in water level

Outcome

  • Greater than 1,600 L removed over a 13-month time frame
  • Worked with consultant to design and implement a comprehensive remedial plan
  • Operations on site not interrupted
  • Remediation objectives meant which allowed risk assessment to be developed and submitted

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