ELS, EHC-L and EHC Direct Push Injection in Santa Barbara County
- toddwhanna
- Feb 25
- 2 min read
Updated: 6 hours ago
The Legacy SoCal Team recently wrapped up a successful direct‑push injection project in Santa Barbara County injecting Evonik reagents to include ELS (Emulsified Lecithin Substrate), EHC Liquid, and EHC Reagent and Potassium Bicarbonate to address chlorinated solvent groundwater contamination. ELS delivers a slow‑release electron donor to support long‑term anaerobic biodegradation. EHC Liquid creates strong reducing subsurface conditions that drive both chemical and biological breakdown of contaminants. EHC provides a controlled‑release carbon and zero‑valent iron source.
The Legacy Team executed the injection program in two phases. During the first phase, we injected a blended amendment consisting of ELS, EHC Liquid, potassium bicarbonate, and anaerobic mix water. This mixture was delivered through 44 direct‑push injection points across five depth intervals ranging from 12 to 40 feet below ground surface. At each interval, the DHC microbial culture was introduced to support enhanced biodegradation.
In the second phase, the team injected EHC Reagent mixed with anaerobic mix water into 38 direct‑push injection points. The EHC slurry mixture was delivered across 11 treatment intervals between 15 and 45 feet below ground surface. DHC microbial culture was injected at each treatment interval to further support enhanced biodegradation.
The Legacy team received and off-loaded the reagents at the job location.
Temporary Fencing with Privacy Screen was set up to securly store the ELS and the EHC.
All Mix water was made anaerobic onsite in two 1,000 gallon poly storage tanks, using Newman Zone OS oxygen scaventer.
All Reagents were mixed and injection from one of our self-contained Injection Trailers.
The Direct Push toolig was advacned using a Geoprobe 7822DT.
We are proud of our team, their attention to detail, teamwork, and commitment to safety ensured a smooth and efficient field event from start to finish. Great work, team!
If you have any questions on this project, or if we can help support any of your current or upcoming projects, please contact us.
This post can also be viewed on our company LinkedIn page. Please follow Legacy Remediation on LinkedIn to stay up to date on upcoming events and completed projects.
