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What is in-situ chemical oxidation (ISCO)?

In-situ chemical oxidation (ISCO) is an environmental remediation technique where chemical oxidants such as persulfate, permanganate, or hydrogen peroxide are injected into contaminated soil and groundwater to destroy organic contaminants like TCE, PCE, and petroleum hydrocarbons in place — without excavation.

What contaminants can IET remediate?

IET specializes in TCE remediation, chlorinated remediation, and comprehensive environmental treatment. We remediate chlorinated solvents (TCE/trichloroethylene, PCE/perchloroethylene, DCE, vinyl chloride), petroleum hydrocarbons (BTEX, gasoline, diesel, MTBE), heavy metals (chromium, lead), NAPL, DNAPL, PAHs, creosote, and mixed contamination using ISCO, ISCR, bioremediation, EZVI, and ISGS technologies.

How long does environmental remediation take?

Remediation timelines vary by technology and site conditions. ISCO can achieve significant contaminant reduction in weeks to months. Enhanced bioremediation typically requires 2–5 years of active treatment. IET's patented ferric iron-activated persulfate provides sustained treatment lasting over 2 years to prevent contaminant rebound.

What states does IET provide environmental drilling services?

IET provides environmental and geotechnical drilling services nationwide including Pennsylvania, Ohio, North Carolina, South Carolina, Texas, Florida, New Jersey, New York, Virginia, Georgia, Tennessee, Indiana, Illinois, and more. IET operates 50+ specialized rigs including CME, Geoprobe, AMS, and barge drilling equipment.

ISCO - Persulfate

Ambler, PA — Ferric Oxide Persulfate ISCO Treatment

Ambler, PennsylvaniaMay 2025

Project Overview

IET deployed an advanced In-Situ Chemical Oxidation (ISCO) program at a confidential industrial site in Ambler, PA using ferric oxide-activated persulfate technology. This project demonstrates the effectiveness of activated persulfate systems for treating subsurface contamination.

The treatment utilized over 1,100 pounds of sodium persulfate activated with 275 pounds of ferric oxide, delivered through IET's specialized injection trailer system with on-site supervision and quality control.

Treatment Technology

Ferric Oxide Activated Persulfate

Sodium persulfate (1,102 lbs) activated with ferric oxide (275 lbs) to generate powerful sulfate radicals

• Long-lasting oxidant for sustained treatment
• Effective across wide pH and temperature ranges
• Targets chlorinated solvents and petroleum hydrocarbons

Injection Methods

IET Injection Trailer system with professional crew supervision for precise delivery and distribution

Project Specifications

• Site: Confidential Industrial Site, Ambler, PA
• Completion Date: May 12, 2025
• Sodium Persulfate: 1,102 lbs
• Ferric Oxide Activator: 275 lbs
• Injection Duration: 1 day with IET trailer system
• Administrative Support: Comprehensive reporting and on-site management