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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 Program

Memphis, TN

August 2012

Materials Supply

Dual-Technology Materials Package

An environmental consulting firm contracted IET for materials supply supporting a dual-zone remediation program. The large-scale dual-technology program demonstrated IET's capability to deliver extensive materials packages for complex multi-zone remediation projects. The project strategically addressed both unsaturated soil zones requiring nano-scale EZVI treatment and saturated groundwater zones requiring traditional enhanced reductive amendments, showcasing IET's expertise in customized remediation solutions.

Treatment Materials

Unsaturated Soils - Area A

• EZVI (17% concentration): 5,121 gallons of high-concentration nano-scale treatment

• Emulsified zero-valent iron particles designed for unsaturated zone mobility

• Advanced delivery system for vadose zone contamination

Groundwater & Saturated Soils

• EHC (Enhanced Hydrogen Release): 22,400 lbs of controlled-release hydrogen donor

• Zero Valent Iron: 24,640 lbs of micro-scale iron for chemical reduction

• Vitamin B2: 46,825 g supporting microbial dehalogenation pathways

• Vitamin B12: 6,745 g essential cofactor for reductive dechlorination

• Yeast Extract: 1,680 lbs comprehensive protein and nutrient source

• Hydrolyzed Kelp: 4,928 lbs high-quality organic substrate

• Calcium Propionate: 11,200 lbs long-term electron donor

• Sulfite: 1,680 lbs oxygen scavenger

• Nutrient Package: 1,680 lbs complete microbial amendment

Project Details

Client

Environmental Consulting Firm

Location

Memphis, Tennessee

Completion Date

August 2012

Scope

Materials supply (labor and injection operations performed separately)

Technologies

EZVI (unsaturated) + EHC/Fe enhanced bioremediation (saturated)

Contaminants

Chlorinated volatile organic compounds (CVOCs)