The Legacy Team efficiently completed the installation of Direct Push Injection Wells and the injection of a specialized mixture at a studio site in Los Angeles. The mixture included Evonik's ELS (Emulsified Lecithin Substrate), EHC Liquid Mix, Anaerobic Mix Water, and DHC (Dehalococcoides) Microbial Culture. To minimize disruption to the business, all work was conducted overnight, between midnight and 10:00 AM.
The first mobilization task was to install 3/4" PVC Injection Wells, half of the Wells could be installed with a Geoprobe 6011DT Direct Push Rig.
The remaining injection wells were to be installed in a basement, accessible only via a narrow dirt ramp and featuring a low ceiling.
For these basement locations, the plan involved utilizing one of our specialized Geoprobe 420M Dolly Rigs, designed for limited-access areas.
To get our Geoprobe 420M Dolly Rig down the ramp, we simply added another set of wheels to the top of Geoprobe, so it could be rolled laying down.
We connected the Geoprobe 420M to the Geoprobe 6011DT with a tow strap, and slowly drove the Geoprobe forward, safely lowering the 420M down the ramp.
The ride down the ramp was a little bumpy, mostly because the ramp condition wasn't great. The dirt ramp was uneven and it had ruts from water erosion.
We just took it slow and the Geoprobe made it down without issue.
Once we were in the basement, we were able to start setting the 3/4" Injection Wells.
We advance 1.75" OD Direct Push Rod with the Geoprobe 420M, and then installed the 3/4" PVC Injection Wells through the ID of the Rod.
The second mobilization task was for the Well Injection. After seeing how small our available work area was going to be, we decided mobilized our smallest trailer mounted Injection Rig to the project.
It is hard to see from this image, but packed into these 3 parking spaces is our Injection Trailer, a 25kw Generator, and two (2) 1,000 gallon poly storage tanks, all stored within a spill berm.
Since space was limited, we inventoried the reagent at our regional office. The field crew brought out the drums of ELS and bags of EHC Liquid Mix with us nightly to the jobsite.
We used a high-viscosity drum pump to transfer the ELS Concentrate to our shearing system. From there the ELS is sheared with anaerobic water and transferred to one of our two (2) Injection Trailer Mix Tanks.
The Well Injections went smooth, we injected into 5-6 simultaneous Wells.
At the end of each work shift, all well box lids were replaced, and all of our hoses and well head adapters were rolled up and stored in the staging area.
The Wells in the basement went well, however we had to lower the injection rate to manage the groundwater mounding.
Also there was not any power in the basement, so we brought in lighting.
During the Well Injection, adjacent monitoring wells were monitored with a multi-parameter probe.
Additionally a Water Level Meter was used to measure and groundwater level mounding.
We also had one of our full size Injection Support Trucks onsite, that was able to store much of our Injection equipment at the end of each shift.
The onsite work was successfully completed and the offsite work will begin in the next few months. 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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