Traditional in-situ remediation systems often require separate wells, piping networks, and surface equipment to deliver treatment solutions and oxygen. The Ecosafe® EMS Single Tube Dual Purpose Injection Well integrates both functions into one engineered system, allowing sequential or automated injection of the Ecosafe® EMS remediation solution and compressed air through a single well. This innovative design simplifies installation, reduces infrastructure costs, improves operational flexibility, and creates optimal subsurface conditions for contaminant degradation.

Engineering a Better Injection Well for Modern Environmental Remediation

The success of any in-situ remediation project depends not only on the chemistry used to destroy contaminants, but also on how efficiently those treatment agents are delivered into the subsurface.

Poor well design can create uneven distribution, unnecessary drilling costs, excessive maintenance, and reduced treatment efficiency. Recognizing these challenges, Ecosafe® EMS developed the Single Tube Dual Purpose Injection Well, an engineering solution that combines liquid and air injection into one integrated system.

This design simplifies field installation while maximizing contaminant contact, oxygen delivery, and REDOX reaction efficiency.

One Well. Two Treatment Functions.

Unlike conventional remediation systems that require independent wells or dedicated injection lines for liquid reagents and oxygen delivery, the Ecosafe® EMS well uses a single injection tube for both phases of treatment.

The same well can deliver:

• Ecosafe® EMS remediation solution (Phase 1)
• Compressed air to increase dissolved oxygen (Phase 2)

The transition between both operating modes can be performed manually or automatically using control valves, allowing continuous treatment with minimal operational complexity.

The result is a flexible remediation platform capable of adapting to varying site conditions while reducing field infrastructure.

Engineered Well Construction

The injection well is specifically designed to ensure durability, hydraulic efficiency, and uniform treatment distribution.

Key construction components include:

• Flush-mounted locking well vault for surface protection.
• Heavy-duty wellhead assembly with a single injection port.
• Conductor casing to stabilize upper formations.
• Cement or bentonite seal to prevent surface infiltration.
• Inner PVC or stainless-steel casing.
• Clean silica filter pack surrounding the screened interval.
• Precision slotted screen for even radial distribution.
• Stainless-steel foot cap to optimize flow into the treatment zone.

Together, these components create a robust injection system capable of operating under demanding field conditions while maintaining long-term reliability.

Intelligent Surface Equipment

The engineering design extends beyond the well itself.

The Ecosafe® EMS surface system incorporates separate delivery equipment for each treatment phase while maintaining a common injection point.

Phase 1 – Liquid Injection

The liquid delivery system includes:

• Ecosafe® EMS solution tank
• Isolation valve
• Flow meter
• Pressure gauge
• Check valve
• Injection connection

This configuration allows precise control of remediation solution delivery throughout the treatment program.

Phase 2 – Air Injection

The oxygen delivery system consists of:

• Air compressor
• Aftercooler and moisture separator
• Pressure regulator
• Flow meter
• Check valve
• Common injection connection

Compressed air increases dissolved oxygen concentrations within groundwater, sustaining aerobic conditions and enhancing REDOX degradation.

Internal Flow Dynamics

The illustration highlights one of the most important engineering advantages of the system: both treatment phases use the same hydraulic pathway.

During Liquid Injection

The Ecosafe® EMS solution moves radially outward through the screened interval.

This phase:

• Reduces interfacial tension.
• Releases contaminants from soil particles.
• Promotes contaminant desorption.
• Establishes colloidal transport pathways.

During Air Injection

Compressed air follows the same injection path.

As oxygen dissolves into groundwater, dissolved oxygen concentrations increase throughout the treatment zone.

This promotes:

• Aerobic degradation.
• Oxidation reactions.
• Enhanced microbial activity where applicable.
• Long-term contaminant destruction.

The two phases complement one another without requiring additional wells or underground infrastructure.

Creating an Efficient REDOX Reaction Zone

The interaction between contaminant mobilization and oxygen delivery creates a highly reactive treatment environment surrounding each injection well.

Within this REDOX zone:

• Desorbed hydrocarbons become accessible to oxidizing species.
• Dissolved oxygen supports oxidation-reduction reactions.
• Organic contaminants are progressively degraded.
• Intermediate compounds continue to oxidize.
• Final mineralization produces harmless end products including carbon dioxide and water.

Because oxygen is continuously supplied after contaminant mobilization, the treatment zone remains active for extended periods, improving remediation efficiency.

Engineering Specifications

The design accommodates a wide range of remediation applications through standardized engineering specifications.

Typical parameters include:

• Well diameter: 4–6 inches.
• PVC or 316 stainless steel construction.
• Single injection tube.
• Slotted screen interval customized to site conditions.
• Silica filter pack.
• Bentonite or cement seal.
• Liquid injection pressures up to approximately 50 psi.
• Air injection pressures up to approximately 100 psi.

These specifications can be adapted according to site geology, contaminant depth, hydraulic conductivity, and remediation objectives.

Broad Range of Applications

The Single Tube Dual Purpose Injection Well is suitable for remediation projects involving:

• Petroleum hydrocarbon contamination.
• BTEX compounds.
• Chlorinated solvents.
• Industrial facilities.
• Brownfield redevelopment.
• Landfills.
• Underground storage tank releases.
• Soil and groundwater remediation projects.

Its flexible design allows deployment in both pilot studies and full-scale remediation programs.

Operational Advantages

The engineering simplicity of the system translates directly into operational benefits.

Reduced Installation Costs

Fewer wells mean lower drilling, construction, and material costs.

Smaller Project Footprint

Reduced surface infrastructure minimizes site disruption and simplifies permitting.

Greater Operational Flexibility

Operators can alternate between liquid injection and oxygen delivery using the same equipment.

Improved Treatment Efficiency

Delivering both treatment phases through one well increases contact between contaminants and reactive treatment conditions.

Automation Ready

The design is compatible with automated control systems, remote monitoring, and real-time process optimization.

Supporting Sustainable Site Restoration

Beyond engineering efficiency, the Single Tube Dual Purpose Injection Well reflects the broader Ecosafe® EMS philosophy of sustainable remediation.

By reducing drilling activities, minimizing construction materials, simplifying operation, and improving treatment effectiveness, the system lowers both environmental impact and project costs while accelerating site restoration.

It demonstrates how innovative engineering can complement advanced remediation chemistry to produce cleaner, safer, and more sustainable remediation outcomes.

• The Ecosafe®EMS Single Tube Dual Purpose Injection Well integrates advanced engineering with sustainable remediation by combining liquid treatment and oxygen delivery in one efficient system. The result is a simpler, more economical, and highly effective approach to restoring contaminated soil and groundwater.