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  XCG Consultants Ltd.
T.519-741-5774
F.519-741-5627
 
Maritime Life Bio-augmentation
Start Date: 1/1/2001
End Date: 1/1/2002
Location: Toronto, Ontario
Project Scale: Active or Inprogress, Monitored.
Media Treated: Liquid, Off-Gas.
Clean up of Site Involved: Site Characterization & Assessment, Treatment.
Site Condition: Commercial plaza with contaminated groundwater underneath, including:

Hydrocarbon compounds:
  • Total petroleum hydrocarbon (TPH)
  • Benzene
  • Toluene
  • Ethylbenzene
  • Xylenes
Chlorinated hydrocarbon compounds:
  • Chlorobenzene
  • 1,2 dichlorobenzene
  • 1,4 dichlorobenzene
  • Vinyl chloride
  • 1,1 dichloroethene
  • 1,1 dichloroethane
  • 1,1,1 trichloroethane
Proposed Site Usage: n/a
Reasons for Success: Detailed evaluation of the existing multi-phase extraction and soil vapor extraction system led to a substitution by one with an improved cost-effectiveness ratio.

Cost effective to replace active system with a passive in-situ program.
Regulatory Approvals Required: MOE Table A Guidelines
Exceedance of Set Standards: n/a
Technologies Used:
 Passive in-situ bio-augmentation program.
Description:
 Injection of a combination of sodium lactate and molasses solutions into the existing monitoring well network with the objective of stimulating the naturally-occurring bacteria, which would degrade the pollutants.
Emissions/Byproducts: 13 of 17 monitored wells that contained TPH or volantile organic compounds (VOCs) were below their respective MOE Table A Guidelines after the latest sampling, TPHs were below the MOE Table A Guideline of 1,000 microgram/L. The VOC concentrations form the remaining four monitoring wells still had exceedances of the Table A Guidelines but had decreased significantly relative to their initial concentration.
Source of Information: XCG Consultants