What Is Soil Mixing for Environmental Remediation?

Soil mixing is an in-situ technique that blends treatment reagents into the soil matrix using excavators or specialized mixing heads. The process promotes uniform reagent distribution while altering the soil’s chemical or physical properties—reducing contaminant mobility and leaching potential.

• One-step in-place reagent mixing—no need to haul soil offsite
• Controlled dosage rates based on contaminant mass and soil volume
• Solidification with cement, polymers, or pozzolans to reduce permeability and increase strength
• Chemical treatment using oxidizers, reducers, or other amendments to degrade or immobilize contaminants
• Reduced exposure risk and disruption to site operations
• Effective for petroleum hydrocarbons, chlorinated solvents, metals, and more

Why Choose AST for Soil Mixing?

AST has the technical expertise, equipment, and field experience to execute soil mixing at even the most complex or expansive sites. Our services are tailored to site conditions and project goals—and can be deployed as a standalone remedy or as part of a combined remedy approach with in-situ injection.

• Custom reagent selection and dosing strategies
• Depth-targeted mixing using excavator mounted heads
• Integration with performance monitoring and QA/QC protocols
• Ability to combine with DPT injection for layered contamination
• Experienced crews and proven field execution across dozens of sites

A Proven Method for Safer, Faster Site Closure

Whether your goal is contaminant immobilization, chemical treatment, or geotechnical stabilization, AST’s soil mixing services deliver reliable performance with minimal disruption. Let us help you turn contaminated soil into stable, compliant ground—ready for closure or redevelopment.