“It’s all about delivery.”
This has been an ETEC catchphrase for decades. The importance of effective amendment delivery is one reason we developed recirculation equipment. However, remediation success hinges on choosing the best delivery method for each site. Direct Push Technology (DPT) is a go-to option for many environmental professionals looking to maximize treatment coverage while minimizing site disruption for long periods of time.
While this injection approach offers several unique advantages, it’s not without trade-offs. Understanding both can help determine whether DPT is the right fit for your remediation goals.
Why Use Direct Push?
1. Broad and Targeted Coverage
DPT injections offer horizontal and vertical flexibility, making it easier to achieve site-wide distribution through overlapping radius of influence. If you need to adjust in the field, you can. Also, in contrast to fixed injection wells, DPT injection points allow you to target contamination exactly where it exists, layer by layer, zone by zone.
2. Rapid and High-Volume Delivery
Compared to viscous slurries or granular amendments, the soluble nature of our products makes them ideal for DPT. The low viscosity and full solubility in water allows for smooth injection at high volumes in short timeframes, streamlining fieldwork and improving distribution.
3. Flexibility in the Field
Unlike installed injection wells, DPT provides the ability to adapt on the fly. Encounter surfacing? Shift over a few feet and continue injecting. Need to reach an inaccessible area? Limited access rigs can navigate constrained or rough terrain with ease. This level of flexibility is a major advantage when you encounter issues in the field, as we so often do.
Considerations and Limitations
1. No Room for Error with Missed Zones
The success of DPT hinges upon ample distribution. If your radii of influence don’t fully overlap, you risk leaving untreated gaps, areas where contaminants persist. There’s often no second chance; multiple applications can be difficult and costly to repeat.
2. Budget Sensitivity
DPT can be a one-shot effort, especially when project budgets are tight. Unlike permanent wells that allow for periodic injections, a single DPT event may be required to hit all areas of concern the first time.
3. Surfacing and Subsurface Complexity
Despite proposed injection locations showing circular distribution, real-world subsurface conditions introduce unpredictability. Fluids follow the path of least resistance, and you may not achieve uniform distribution. This can also cause surfacing, a potential issue with DPT applications. Where the soil will not absorb any more amendment, and the injection fluid surfaces up above ground.
Conclusion
Direct Push Technology remains a versatile tool in the bioremediation toolbox. DPT can deliver impactful results, fast. And some limitations can be reduced by using a fully soluble amendment – a key characteristic of ETEC products. But like any tool, DPT requires precision, planning, and careful consideration of its limitations.
Want to ensure your DPT injections hit your goals? Our team at ETEC specializes in site-specific bioremediation design. Let’s talk about how we can help you achieve the results you are looking for.