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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.

Raleigh Four-Area Remediation

Raleigh, NC

September 2009

Multi-Area Program

Four Distinct Treatment Zones

An environmental consulting firm contracted IET for a comprehensive four-area enhanced reductive remediation program. Each area received customized substrate formulations based on site-specific conditions and contaminant profiles.

Area Breakdown

Area A (11 points)

Enhanced Reductive Package — Primary source area

Area B (10 points)

Enhanced Reductive Package — Mid-plume treatment

Area C (6 points)

Enhanced Reductive Package — Secondary zone

Area D (4 points)

Enhanced Reductive Package — Downgradient treatment

Project Details

Client

Environmental Consulting Firm

Location

Raleigh, North Carolina

Total Injection Points

31 points across four areas

Completion Date

September 2009

Raleigh Four-Area Remediation — Frequently Asked Questions

Answers to common questions about IET's four-area enhanced reductive remediation project in Raleigh, North Carolina.

What was the Raleigh four-area remediation project?

IET completed a comprehensive four-area enhanced reductive remediation program in Raleigh, North Carolina, treating 31 injection points across four distinct zones with customized substrate formulations for each area's contaminant profile.

What technology was used at the Raleigh site?

Enhanced reductive dechlorination (ERD) with customized electron-donor substrate formulations was applied across the four treatment areas to stimulate anaerobic biodegradation of chlorinated solvents.

What contaminants were treated?

The program targeted chlorinated solvents through enhanced reductive remediation, with substrate formulations customized to site-specific contaminant conditions in each of the four zones.

How many injection points were installed?

IET installed 31 injection points distributed across the four treatment areas, completed in September 2009.

Can IET design multi-area remediation programs?

Yes. IET routinely designs multi-area, multi-depth remediation programs with area-specific substrate and reagent dosing, as demonstrated by the Raleigh four-area project.