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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.

Direct Push Drilling

Fast, cost-effective direct push technology for soil profiling, discrete groundwater sampling, and injection point installation — ideal for rapid environmental site characterization.

Applications

Rapid site characterization and soil profiling
Groundwater sampling at discrete depth intervals
Soil gas and vapor surveys
Contaminant plume delineation
Injection point installation for in situ remediation
Temporary groundwater monitoring points
Hydraulic profiling for aquifer characterization
Expedited site assessments

Key Advantages

Minimal site disturbance — small footprint
Rapid advancement with no drill cuttings
Lower cost per boring compared to conventional drilling
Discrete depth groundwater and soil sampling
Ideal for tight access and low-clearance locations
Real-time data collection during advancement
Compatible with MIP, HPT, and EC logging tools

About Direct Push Drilling

Direct push drilling uses hydraulic pressure and percussion to advance small-diameter probes and sampling tools into the subsurface without the need for a drill stem or drill cuttings. IET operates a large fleet of Geoprobe and AMS direct push rigs, enabling rapid mobilization and efficient data collection at environmental sites across the country.

Direct push methods are especially valuable for in situ remediation programs, where injection points must be installed at precise depth intervals across a contaminated plume. IET has completed thousands of direct push borings for soil and groundwater sampling, contaminant plume delineation, soil vapor extraction, and reagent injection as part of ISCO, ERD, and ISCR remediation programs.

Direct Push Drilling Projects

IET Geoprobe direct push rig for soil sampling and groundwater characterization

IET AMS direct push drilling for discrete-depth groundwater sampling

IET direct push technology for ISCO injection point installation at contaminated site

IET Geoprobe field crew performing direct push soil profiling and vapor sampling

Direct Push Drilling — Frequently Asked Questions

Answers to common questions about IET's direct push (Geoprobe) drilling services for environmental site characterization, sampling, and remediation injection.

What is direct push drilling and when is it used?

Direct push drilling uses percussion and hydraulic force to advance steel rods into the ground without rotation or drill cuttings, collecting continuous soil cores, discrete-depth groundwater samples, and soil gas data. It is ideal for rapid environmental site characterization, contaminant plume delineation, and installing injection points for in situ remediation.

How deep can direct push drilling reach?

Direct push typically reaches 50–100 feet in most soils and can extend beyond 150 feet in favorable geology. Maximum depth depends on soil density, refusal at bedrock or boulders, and rig capacity. IET operates multiple Geoprobe direct push units matched to your site conditions.

What are the advantages of direct push over hollow-stem auger drilling?

Direct push produces no drill cuttings, minimizes site disturbance, advances faster, lowers cost per boring, enables discrete-depth sampling, supports real-time logging tools (MIP, HPT, EC), and can access tight or low-clearance indoor and industrial settings where conventional rigs cannot fit.

Can direct push be used for in situ remediation injections?

Yes. IET installs injection points via direct push and can directly inject ISCO, bioremediation, and ISCR reagents — including activated persulfate, permanganate, zero valent iron, and electron donors — without installing permanent wells, accelerating remediation delivery.

Does IET provide direct push drilling nationwide?

Yes. IET mobilizes direct push and Geoprobe crews nationwide from offices in Pennsylvania, Ohio, Texas, South Carolina, North Carolina, and Florida, supporting Phase II ESAs, groundwater monitoring, and remediation injection programs across the United States.