EDS-ER™ and KB-1® Injections Within the Public Right-of-Way at a Los Angeles County Project Site

The Legacy Remediation team recently completed a large-scale direct push injection project in Los Angeles County, California, supporting the remediation of impacted groundwater beneath a public roadway. The project involved the injection of a treatment blend consisting of EDS-ER™ (Tersus Environmental) and KB-1® microbial culture (SiREM) to promote enhanced reductive dechlorination of chlorinated volatile organic compounds (CVOCs) within the target treatment area.

Most injection locations were within the public right-of-way, requiring daily setup, breakdown, and traffic control measures.

Field operations were limited to a six-hour work window, with traffic control set up beginning at 9:00 a.m. and all equipment required to be off the roadway by 3:00 p.m. each day.

The injection program utilized a dedicated 2,000-gallon water truck for mix water delivery. A 750-gallon buffer tank on a support vehicle ensured uninterrupted injection during water resupply trips.

Legacy secured access to a nearby construction water meter and routed a fill hose onto the source property, providing a safe and convenient location for water truck filling and supporting efficient field operations.

A flatbed truck was used to transport the EDS-ER™ 275-gallon reagent totes, and two 330-gallon totes utilized for the preparation and storage of anaerobic water used during the bioaugmentation process.

All EDS-ER™ mixing, injection, and field data collection were completed from one of Legacy Remediation's self-contained injection trailers.

KB-1® microbial culture was added inline through our 10-point injection manifold during the injection process.

A total of 23 direct push injection locations were completed, targeting depths between 15 and 40 feet below ground surface (bgs). Approximately 4,300 gallons of amendment solution were injected at each location using a top-down injection approach, targeting 5-foot long treatment intervals, at four simultaneous injection points.

In total, just over 99,000 gallons of amendment solution was injected across 23 Direct Push Injection Points. This project highlights the value of Legacy Remediation's specialized mobile injection equipment, which enables rapid mobilization, efficient setup and breakdown, and reliable field execution in challenging work environments. Through careful planning and close coordination with the client and traffic control subcontractor, the Legacy team successfully and safely implemented the remediation program within the public right-of-way while maintaining project efficiency and minimizing disruption to traffic and the surrounding community.

If you have questions about this project or would like to discuss how Legacy Remediation can support your current or upcoming projects, please contact us.

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