RegenOx and ORC Injection at a busy Multi-Tenant Residential Project
- toddwhanna
- Sep 19
- 2 min read
The Legacy Remediation team completed another successful injection project at an 84 unit residential development in Los Angeles. The remediation phase was planned to be completed before the construction started, but due to delays, the remediation phase happened concurrently with the construction.
Working amid constant construction crews, the movement of heavy materials, and daily deliveries was certainly a challenge, adaptability and focus was key to keep things safely moving forward.
The project remediation design required combined remedies to effectively address the contaminants present.
Our team applied a mixture of RegenOx Part A and Part B, provided by Regenesis, which is an advanced in-situ chemical oxidation reagent.
RegenOx Part A is a solid oxidant blend that provides a strong source of oxygen for oxidation reactions.
RegenOx Part B is a liquid solution that activates Part A.
When both of these compounds are mixed together, it leads to a chemical reaction that produces strong oxidizers that break down the contaminants.
 The RegenOx mixture was injected using a top-down injection approach, between 35 - 75 feet bgs
Additionally we also injected Oxygen Release Compound (ORC), between 75 - 35 feet bgs, using the bottom-up approach.
Since onsite space was very limited, and with a three-month stay ahead of us, we didn’t have room to set-up one of our self-contained injection trailers.
We also had to account for the fact that we were mixing two different types of reagents: one with a water-like consistency, and the other a slurry.
We used some of our skid-mounted equipment, setting it up in a corner of the site where it would be out of the way.
Because the design required treatment down to 75 feet below ground surface (bgs), we partnered with Veteran Drilling to advance boreholes to the necessary depths using their DPT Hammer–mounted CPT Rig. Standard Direct Push Rigs were not capable of reaching those depths at this site.
We also used a Geoprobe 6600 Truck Mounted Direct Push Rig to support Tool Removal and boring grouting and abandonment.
The drilling proved challenging, and unfortunately, several injection tools were damaged or bent while advancing to the 75-foot treatment interval.
Despite challenges with site access, ongoing construction activities, and challenging lithology, the Legacy Remediation team successfully completed the project, showcasing both technical expertise and adaptability in the field.
If you have any questions on this project, or if we can help support any of your current or upcoming projects, please contact us.
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