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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.

Memphis Dual-Zone Treatment

Memphis, TN

March 2009

Dual Technology

Dual-Zone Treatment Strategy

An environmental consulting firm contracted IET for comprehensive dual-zone remediation combining unsaturated EZVI injection with deep saturated HRC/Fe bioremediation. The program addressed both shallow soil contamination and deep groundwater impacts.

Treatment Components

Area A Unsaturated (16 points)

• EZVI injection: 25 gallons per point

• Total: 400 gallons EZVI deployed

• Specialized unsaturated zone application

Area A Saturated Zone (18 triple-interval points)

• Depth: 15-25' BGS

• HRC/HRC-X: 40 lbs, ZVI: 60 lbs (2-5 micron) per point

• Complete nutrient package: propionate, yeast extract

Area B Saturated Zone (3 triple-interval points)

• Depth: 15-25' BGS

• HRC/HRC-X: 20 lbs, ZVI: 110 lbs (2-5 micron) per point

• Enhanced iron content for source area treatment

Project Details

Client

Environmental Consulting Firm

Location

Memphis, Tennessee

Completion Date

March 2009

Special Note

Two Area A points not completed (surfacing/utilities)

Adaptation

Double-dose applied to two remaining points