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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.

Long-Term ISCO Program

Chevron Phillips Chemical H₂O₂ Program

Guayama, Puerto RicoJanuary-July 2023

Project Overview

IET managed an extensive 7-month hydrogen peroxide injection program for Chevron Phillips Chemical in Guayama, Puerto Rico. This long-term deployment delivered 340,000 lbs (94 days) of 34% hydrogen peroxide with continuous on-site equipment and personnel, representing one of IET's longest sustained chemical oxidation operations.

Monthly Deployment Timeline

January 2023 (17 days)

37,500 lbs H₂O₂ (15 totes) - Project initiation

February 2023 (19 days)

80,000 lbs H₂O₂ (32 totes)

March 2023 (23 days)

107,500 lbs H₂O₂ (43 totes) - Peak deployment

April 2023 (15 days)

47,500 lbs H₂O₂ (19 totes) + 42,500 lbs storage

July 2023 (20 days)

67,500 lbs H₂O₂ (27 totes) - Final phase

Project Details

• Client: Chevron Phillips Chemical PR Core LLC
• Site: RD 710-BO Las Mareas, Guayama, PR
• Completion Date: January 9 - July 31, 2023
• Technology: Continuous Hydrogen Peroxide (34%) Injection
• Total H₂O₂: 340,000 lbs (136 totes)
• Project Duration: 94 days (7 months)
• Total Project Value: $1,313,605
• PO Number: 4504262358