In Situ Treatment

IN SITU TreatmentSanexen has conducted a large number of in situ remediation projects using several proven and innovative technologies. The following is a partial list of treatment processes used:

  • Chemical oxidation of petroleum hydrocarbons
  • Elimination of gasoline by forced aeration (sparging), extraction of volatile compounds and catalytic oxidation
  • Injection of a bacterial consortium in coarse-grained soils contaminated by light hydrocarbons
  • Steam injection and multi-phase extraction to remove heavy fuel oil from fractured rock
  • Recovery by pumping chlorinated solvents in the form of dense non-aqueous phase liquids (DNAPL), including the installation of a Waterloo-type barrier – the largest DNAPL recovery project performed in Canada to date
  • Washing coarse-grained soil using warm-water circulation to remove hydrocarbons and metals
  • Multi-phase extraction and in situ biotreatment to eliminate furnace fuel oil, at a depth of 20 meters, in a dense urban area
  • Washing of coarse-grained soil by warm water circulation to remove hydrocarbons and metals
  • Volatilization and extraction of PCEs present as DNAPL beneath a building
  • Controlling off-site migration of contaminantsdenser tahn water (TCE, DCE) by pumping, treatment and injection of additives to create conditions favourable to contaminant biodegradation

Among the various projects completed by Sanexen, certain issues have involved R & D aspects – an area for which Sanexen is renowned.

Most in situ projects are highly technical in nature and call for in-depth knowledge of the discipline in question. Sanexen’s personnel have a solid experience in the development of remediation strategies and the implementation of proven and efficient treatment systems. The technical approach leads to the attainment of the established remediation objectives within pre-set financial parameters and schedules.

Sanexen does not simply sell one technology. The company offers each of its clients the best in situ solution to every site-specific environmental issue.