The Legacy Remediation team recently completed a 4 week anaerobic bioremediation project in Santa Barbara County. We injected a mixture of ELS Concentrate, EHC Liquid Mix (dry), Potassium Bicarbonate and SDC-9 bioaugmentation culture, all provided by PeroxyChem.
The scope of work consisted of 30 injection points, targeting direct push injection between 30 to 50 feet bgs.
We the prepared the amendment mixture our self contained Injection Trailer.
Rain for Rent hooked us up with two poly water tanks that matched our trailer's paint color almost perfectly 😊
We mixed the sheared ELS concentrate and the dry amendments in our two (2) onboard 150 gallon Stainless Steel Mix tanks.
We then pumped the combined mixture out to the direct push injection points.
ELS is a food-grade lecithin-based carbon substrate used to enhance anaerobic bioremediation.
The ELS Concentrate was shipped in 55 gallon steel drums, that we transferred to our shearing pump as part of the mixing process.
The EHC Liquid Dry Mix and Potassium Bicarbonate were both packaged in 50 pound bags.
We used Newman Zone OS provided by RNAS to remove the dissolved oxygen from the water to create the reducing conditions necessary for successful anaerobic bioremediation.
The mix water was prepared onsite in two (2) 6,900 gallon poly storage tanks.
The geology in the treatment interval was made up of pretty fine material. We were injecting around 2,200 gal/point, with most points accepting flow between 1-2 gpm. To maintain good daily production numbers we injected into 8 simultaneous direct push injection points.
The site was very small and our dual purpose Injection Trailer / Geoprobe Transport Trailer helped us kept a small footprint.
We had a good amount of rain during the project, but that didn't slow down our team or the Geoprobe Direct Push Rig.
We used a Geoporobe 7822DT to advanced 5-foot long x 1.5-inch outside diameter Injection Tools, that have internal Stainless Steel Wire-Wrapped Screens to prevent plugging.
We encountered sandstone layers and cobbles at many of the points. For these points we pre-drilled beyond the point of refusal with 4.5" Solid Stem Augers, then switched back to traditional direct push for the injection. Having a dual purpose Direct Push/Auger Rig onsite made switching over quick and seamless.
All projects have their share of challenges, and this project was no exception. I could not be prouder of our team's commitment to safety, problem solving abilities, and customer service. Sometimes our never give-up way of thinking makes things harder for us, but that is okay, we are used to it, this is the same mindset we have had for the past 25 years 😊
If you have any questions about this project, or if we can help support any of your current or upcoming projects, please contact us.
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