In Situ INJECTIONS
ZEBRA is a leader in the environmental industry for In Situ Injections, and continues to develop new technologies to stay on the technical front of soil and groundwater remediation. In Situ injections represent a dramatic shift in recent years in the environmental remediation industry. It was recognized early on that using direct push technology could provide an enormous amount of operational flexibility for in situ treatment compared to traditional injection wells. Prior to direct push based options, in situ injections typically involved instillation of an array of standard well screens, and a manifold system to deliver the products.
This was a relatively expensive option, and could result in substantial disruption to facilities and operations compared to direct push injections. Also, it was soon recognized in the environmental industry that "hard piped" injection systems routinely resulted in non-uniform results. Typically, a "hot spot" or "rebound" lingered after the injection event using traditional wells, and additional injection wells and manifold piping were not a cost-effective means to address these residual issues.
The direct push option was originally used to address these residual issues, and then evolved to become the primary injection option over time. Now, it is very common for remedial designs to include multiple injection events, anticipating that the initial event will address the entire known contaminant mass, and subsequent injections will target any residual mass remaining. This approach has proven to be the most cost-efficient method to deliver the injection product to the contaminated matrix.
