The Legacy Remediation Team completed this 4-week ISCO project on one of the Channel Islands off the coast of Southern California. The project site was at a former fueling facility. The treatment area has shallow groundwater affected primarily with benzene and methyl tertiary butyl ether (MTBE).
Klozur One provided by Evonik was the selected remediation technology. Klozur® One is an all-in-one product containing Klozur Sodium Persulfate and selected activator reagents.
We mobilized our smallest custom-built self-contained Injection Trailer, along with our Kubota 4x4 Diesel Utility Vehicle. To keep things tight and simple, we loaded all of our project equipment and supplies on either the Trailer or the UTV.
Our Injection Equipment was sent over to the Island the week prior on a Barge that departed from the Port of Los Angeles.
The crew would mobilize on the passenger ferry on Monday mornings, and return to the mainland on Friday afternoons.
The work area is located at a remote part of the island and the living conditions are similar to camping. On the Monday morning Ferry, we would each need to bring food for the week.
The engineering firm staff not only needed to bring their personal gear, but they were also loaded down with field equipment and supplies for the week.
Even thought we used our smallest Injection Trailer for this remote location project, we aren't missing any of the safety or performance features of our full size systems.
The 15 pallets of Klozur One was also sent to the Island in advance of the crew.
Our Kubota UTV worked well to shuttle the Klozur One bags from the storage area to the work area.
Our ~45,000 gallons of mix water came from a nearby fire hydrant.
The Klozur One was delivered in 55.1 pound bags.
One of the jobs of the helper was to keep the Injection Rig Operator supplied with pre-measured buckets of dry Klozur One product.
We mixed the Klozur One in alternating batches in our onboard 75 gallon Poly Mix Tanks, to kept a constant supply to our Injection Pump.
The mechanical mixers, in conjunction with the injection pump recirculation, ensures proper mixing of the Klozur One reagent.
Klozur SP is most commonly activated with 25% Sodium Hydroxide liquid, resulting in an Alkaline solution.
The activators in Klozur One take it to the opposite end of pH scale, resulting in an Acid solution, which doesn’t play well with most metals.
Chemical compatibility is very important with our equipment. Although we have 4 injection pumps on this trailer, the one we selected for this project was an Acid rated centrifugal chemical pump powered by a thermally protected, totally enclosed motor.
Reagent distribution was managed through our 5-point Injection Manifold. We are able to regulate both pressure and flow rate.
Our manifold is fitted with five (5) digital magnetic flow sensors that have totalizers to accurately calculate the volume injected in each Well.
Each of the 4-inch Injection Wells were fitted with our standard slip style Well Head Adapter. They are secured to each well with the use of a Ratchet Strap for safety.
Reagent distribution was monitored during the injection process, with the use of a Horiba Multiparameter Water Quality Meter.
Stacey Telesz, the Technical Sales Manager for Evonik, made a visit to the project. We took her for a ride around the area and we came upon this fella just grazing in the nearby field.
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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