Reinjectable Pressure Injection Point (PIP) System
Permanent, Selective Injection Systems for Repeated Groundwater Remediation Applications
The Reinjectable Pressure Injection Point (PIP) System is a permanent subsurface injection technology designed to facilitate repeated delivery of remediation amendments to targeted treatment zones. The system combines the advantages of direct-push injection with the long-term accessibility of a permanent installation, allowing remedial amendments to be injected multiple times from the same location without repeated drilling or direct-push mobilizations.
The Reinjectable PIP System is particularly well suited for sites requiring multiple amendment applications over months or years, including enhanced reductive dechlorination (ERD), in situ chemical reduction (ISCR), aerobic bioremediation, source area treatment, and groundwater plume management.
Why Use a Reinjectable PIP System?
Many groundwater remediation projects require repeated injections to maintain treatment effectiveness. Traditional direct-push injection methods can become costly when the same locations must be revisited multiple times.
The Reinjectable PIP System provides a permanent injection infrastructure that allows:
- Multiple amendment applications from the same location
- Targeted delivery to specific depth intervals
- High-pressure injection for increased radius of influence
- Reduced long-term field mobilization costs
- Flexible amendment selection over the life of the project
By eliminating the need for repeated drilling events, the system can significantly reduce remediation lifecycle costs while improving treatment consistency.
Key Features
Permanent Injection Infrastructure
Once installed, the Reinjectable PIP System remains available for future injections, allowing treatment strategies to evolve as site conditions change.
Selective Depth Targeting
One-way injection valves can be installed at multiple depths, allowing amendments to be delivered precisely where contamination exists.
High-Pressure Injection Capability
The system supports injection pressures up to approximately 90 bar (1,300 psi), enabling greater distribution and improved amendment contact with contaminated media.
Repeated Amendment Applications
Suitable for sites requiring periodic replenishment of:
- Electron donors
- Bioaugmentation cultures
- Chemical reductants
- Oxidants
- Nutrients
- Surfactants
- Buffering agents
Broad Amendment Compatibility
The system can inject materials ranging from low-viscosity fluids to highly viscous suspensions, including:
- Water-based solutions
- Alcohol-based substrates
- Emulsified vegetable oils
- Molasses
- Polylactates
- Colloidal amendments
- Slurries and suspended solids
Applications
The Reinjectable PIP System can be used with a wide range of remediation technologies including:
Enhanced Reductive Dechlorination (ERD)
- EDS-ER™
- EDS-Activator™
- EDS-ME™
- Bioaugmentation Cultures
In Situ Chemical Reduction (ISCR)
- mZVI™
- ZVI-ironGel™
- EDS-ZVI™
Aerobic Bioremediation
Anaerobic Oxidative Bioremediation
Source Area Treatment
- TASK™ Anionic Surfactant Blend
- TASK Soy™
Geochemical Conditioning
Advantages Over Conventional Injection Wells
| Reinjectable PIP System | Conventional Injection Well |
|---|---|
| Selective injection at multiple depths | Typically screened over a larger interval |
| High-pressure injection capability | Generally limited to lower pressures |
| One-way valves prevent backflow | Potential for reflux and short-circuiting |
| No gravel pack around injection intervals | Flow can preferentially follow annular materials |
| Designed for repeated amendment applications | Often optimized for monitoring or extraction |
| Can target individual treatment zones | Limited vertical control |
Installation
The Reinjectable PIP System is installed using drilling methods appropriate for site conditions. Following installation, the annular space is sealed with an impermeable grout to prevent vertical migration along the borehole and ensure targeted delivery to designated injection intervals. Injection ports are positioned at site-specific depths based on contaminant distribution, geology, and remediation objectives.
Typical Applications
The Reinjectable PIP System is particularly valuable for:
- Large chlorinated solvent plumes
- Long-term ERD projects
- Source area treatment zones
- Sites requiring periodic amendment replenishment
- Deep aquifer remediation projects
- High-resolution site characterization programs
- Adaptive remediation strategies utilizing performance monitoring data
Target What Matters Most
Not every portion of a plume requires the same remedial approach. The Reinjectable PIP System supports Tersus Environmental's philosophy of targeting amendments where they provide the greatest benefit, allowing practitioners to selectively inject different products at different depths and at different stages of remediation.
Whether your objective is to Treat, Restore, or Close, the Reinjectable PIP System provides a flexible platform for long-term groundwater remediation
