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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.

California Source Area & PRB Permanganate Program

Brea, CA

November 2004

Permanganate ISCO

Dual-Component Treatment Strategy

An environmental consulting firm contracted IET for a comprehensive permanganate oxidation program combining source area treatment with a downgradient permeable reactive barrier (PRB). The project utilized variable-concentration permanganate solutions for maximum subsurface distribution.

Source Area Treatment

High-Strength Injections (6 points)

340 gal 10% NaMnO4 (375 lbs KMnO4 each), 57-62' & 67-72' BGS, 25' radius distribution

Medium-Strength Injections (2 points)

215 gal 10% NaMnO4 (240 lbs KMnO4 each), dual-interval compressed air distribution

Low-Strength Injections (2 + 7 points)

100 gal 10% & 500 gal 2% solutions (110 lbs KMnO4), same depth intervals

Downgradient PRB

7 permanent wells (60-67.5' & 75-82.5' BGS)370 gal each

3 direct-push points (57-62' & 67-72' BGS)275 gal each

PRB utilized 2% NaMnO4 with 250 lbs micronized KMnO4 for enhanced contact time and sustained reactivity

Project Details

Client

Environmental Consulting Firm

Location

Brea, California

Injection Depth

57-82.5 feet below ground surface

Total Injection Points

20 source area + 10 PRB locations

Completion Date

November 2004

Technology

IET Patented Permanganate Injection Process