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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.

Zionsville Three-Zone Treatment Program

Zionsville, IN

March 2018

Former DOW Site

Three-Zone Treatment Strategy

An environmental consulting firm contracted IET for comprehensive remediation of a former industrial research site. The program featured three distinct treatment zones: unsaturated EZVI, electron donor permeable reactive barrier, and downgradient Area C amendments.

Treatment Zones

Unsaturated EZVI Area (14 days)

• DPT rig, injection trailer, and crew — 14 days of continuous operations

• Material handling, supervision, per diem, and forklift included

• Nitrogen pressurized delivery system

Electron Donor PRB (10 days)

• DPT rig, injection trailer, and crew — 10 days of operations

• Material handling, supervision, per diem, and forklift included

• Nitrogen pressurized delivery

Downgradient Area C (2 days)

• DPT rig and injection trailer — 2 days targeted operations

• ZVI, electron donor substrate, nutrient, and propionate amendments

• Material handling and supervision included

Project Details

Client

Environmental Consulting Firm

Location

Zionsville, Indiana

Completion Date

March 2018

Duration

26 days on-site (14 + 10 + 2 zones)

Mobilization

Full equipment mobilization included

Technologies

EZVI, Provect-IR PRB, ZVI amendments