Comprehensive Soil & Groundwater Remediation Services
IET has performed over 3,000 design-build-implementations of in-situ soil and groundwater remediation across the United States since 1998. From source zone NAPL treatment to dissolved plume management, we match proven technology to your site's specific conditions.
Our Remediation Services
IET deploys all major in-situ treatment technologies — selected based on site-specific contaminants, geology, and project goals.
In-Situ Chemical Oxidation (ISCO)
Chemical oxidants — activated persulfate, potassium permanganate, or hydrogen peroxide — are injected directly into contaminated soil and groundwater. Oxidants chemically destroy organic contaminants including TCE, PCE, BTEX, and petroleum hydrocarbons on contact.
ISCO DetailsEnhanced Bioremediation
Electron donors and bioaugmentation cultures stimulate naturally occurring or introduced microorganisms to degrade chlorinated solvents and petroleum contaminants through reductive dechlorination and aerobic biodegradation pathways.
Bioremediation DetailsIn-Situ Chemical Reduction (ISCR)
Zero valent iron and other reductive amendments immobilize or destroy metals (chromium, lead), chlorinated solvents, and mixed contamination through chemical reduction pathways — without generating hazardous waste.
ISCR DetailsNAPL Source Zone Treatment
Dense and light non-aqueous phase liquids require aggressive source removal. IET deploys EZVI, high-concentration ISCO, ISGS soil mixing, and combined approaches to reduce NAPL mass and restore groundwater quality.
NAPL TreatmentSoil Vapor Extraction (SVE)
Vacuum-based extraction removes volatile organic compounds (VOCs) from unsaturated vadose zone soils. SVE is often combined with air sparging to address both soil and groundwater contamination simultaneously.
All Remediation ServicesIn-Situ Geochemical Stabilization (ISGS)
Large-diameter auger or HDD-based soil mixing blends modified permanganate or stabilization agents directly into NAPL-impacted source zones — ideal for high-concentration areas and low-permeability formations where injection cannot achieve adequate coverage.
ISGS DetailsContaminant-Technology Matrix
A quick reference for matching contaminant type to IET's primary treatment approaches.
| Contaminant | Primary Technologies |
|---|---|
| TCE / PCE (Chlorinated Solvents) | ISCOERDISCREZVI |
| Petroleum / BTEX / Gasoline | ISCOAerobic BioremediationSVE+AS |
| DNAPLs / LNAPLs | ISCOISGSEZVIExcavation+ISCO |
| Heavy Metals (Cr, Pb) | ISCRISGSStabilization |
| PAHs / Creosote / MGP Tar | ISCOISGSCombined Remedy |
| MTBE / Fuel Oxygenates | ISCOAerobic BioMNA |
IET's Design-Build Process
From initial site review to regulatory closure — IET manages the full remediation lifecycle.
Site Characterization Review
IET engineers review existing boring logs, monitoring well data, and analytical results to understand contaminant distribution and geological controls.
Technology Selection
Based on contaminant type, depth, soil permeability, and site constraints, IET recommends the most appropriate technology or combination of technologies.
Design & Permitting
Injection point layout, reagent formulation, delivery volumes and pressures are designed. Required UIC permits and local notifications are prepared.
Implementation
IET's field crews mobilize with dedicated equipment — Geoprobe, CME, AMS, or barge rigs — and execute the injection or soil mixing program.
Performance Monitoring
Post-treatment groundwater sampling confirms reagent distribution and tracks contaminant reduction over time.
Reporting & Closure
IET prepares performance reports for regulatory submittal, supporting progress toward no-further-action (NFA) or site closure status.
Frequently Asked Questions
Ready to Clean Up Your Site?
IET's engineers are available to review your site data and recommend the most cost-effective soil and groundwater remediation approach.