Remediation of contaminated soil and groundwater through the use of chemical reagents is effective for a variety of contaminants and geologic site conditions.  Cascade has both the expertise and technology for a wide range of options including: In Situ Chemical Oxidation (ISCO), In Situ Chemical Reduction (ISCR) and Bioremediation.

The safe implementation of chemical oxidants requires specialized, compatible equipment and change management administrative controls.  We have the capabilities to mix oxidants in small batches or through bulk feed systems. We have also developed injection tool strings that minimize exposure to our operators during injection.  Based on hundreds of chemical oxidation projects, Cascade has developed the unique capabilities to support you with dosing and distribution designs.  This ensures contact while taking into consideration oxidant residence times, kinetics and site hydraulics.  Our custom mixing and injection equipment offer safe and effective delivery for optimal contact with subsurface contaminants.

Chemical reduction, either by itself or utilized in a combined biotic remedy, provides the reactivity and persistence needed for effective treatment of metals and solvents in both source areas and plumes. Due to the physical characteristics of these chemistries, delivery to the subsurface is accomplished through injection, emplacement or shallow mixing.  Cascade has supported numerous large projects associated with hexavalent chrome or chlorinated solvents groundwater contamination.

 

Maximize your return on remediation with Cascade.  Our remediation experts provide design support for the effective dosing and distribution of chemical reagents.  Cascade has applied all the commercially available reagent chemistries.  We leverage economies of scale to work with a number of well-respected reagent suppliers to bring you the most application options.  

Chemical remediation options include the following (and more):

In Situ Chemical Oxidation
  • Activated Sodium Persulfate
  • Permanganate (sodium and potassium)
  • Catalyzed Hydrogen Peroxide
  • A combination of any of the above
In Situ Chemical Reduction
  • Zero Valent Iron (ZVI)
  • Emulsified (EZVI)
  • ZVI and Carbon Substrate combined remedies
  • Calcium Polysulfide

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