In-Situ Soil Remediation

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In-Situ Soil Remediation or Surfactant Enhanced Soil Remediation

In-situ remediation for extracting hydrocarbon contamination from soil and groundwater can be thought of as a three-step process as outlined in the below.

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Objective

To remove residual NAPL trapped in the subsurface as part of a project to achieve site closure and comply with local regulatory standards on groundwater quality.  

NAPL that is trapped in the subsurface is mobilized and removed by aggressively flushing subsurface contaminated zones with a surfactant solution.

The BioSolve® Advantage

  • Pinkwater and Activator are both highly lipophilic formulations that strip oil from soil particles on contact during surfactant flooding.
  • BioSolve® products are effective on a wide range of oil, fuel and petrochemical products.
  • Emulsions are very stable; leaving no residual hydrocarbons behind.
  • Products work at low concentrations.
  • Easy to use; performance not impacted by groundwater chemistry.
  • Requires no specialized equipment.
  • Products are compatible with many tertiary treatments
  • Water-based, non-hazardous, no solvents, biodegradable.

Application Guidelines

Inject (gravity feed or low-pressure pump) a 2% to 6% dilute solution of BioSolve® Pinkwater or BioSolve® Activator into the formation as close to the middle of contaminated zones as possible. Preferably recover from wells down gradient to “pull’ Pinkwater solution through the contaminated zone. The alternative of injecting and recovering from the same well is a less effective method.


During extraction, periodically inspect effluent to determine when “breakthrough” occurs, as evidenced by a light pink (Pinkwater) or light blue (Activator) color. Continue extraction well beyond “breakthrough” to pull as much product as possible through the contaminated zone to recover hydrocarbons.


When injection and recovering from a single well, the treatment radius can be extended by “chasing” the surfactant injection with additional water.


Multiple treatments (for example, monthly) often improve NAPL recovery efficiency.


Recovery volume should be 2 – 5 times the volume of surfactant solution that was injected.


Recovered effluent may be treated on site (large projects) or removed from the site using a qualified disposal company.

FIELD APPLICATIONSPinkwaterClearActivatorHydrovent
Surfactant Enhanced Aquifer Remediation
Aerobic Biodegradation of Impacted Soil
Insitu Spill Remediation
Land Farming & Biopiles
Industrial Maintenance
UST & AST Cleaning/Degassing
Subfloor/Interstitular Decomntamination
Vapor/Odor Control
MGP Site & Brownfield Remediation
Stabilization/Solidification
Excavation in Impacted Soil
Hydrocarbon Spill Response
Spill Clean-Up
Equipment Decontamination

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