Services / Full Turn-Key Processing
We will do the Project for you
United Retek Corporation performs on-site ambient
temperature stabilization / solidification recycling of
contaminated soils for a broad spectrum of private and
public sector clients.
United Retek stabilizes/solidifies and recycles contaminated soils containing:
- Virgin petroleum
- Waste oils
- Hazardous metals
- Coal gasification
- Manufactured gas plant (MGP) wastes
The method involves adding a reactive form of
reagent and sometimes a ph buffer (when necessary)
to the metal-bearing waste. Divalent metal cations,
and especially lead, arsenic, cadmium, and chromium
react with the reagents to form very insoluble
compounds. The chemistry is well known and is based
on solubility product data that have been in the
literature for decades.The Retek Process utilizes proprietary chemical
formulations specifically for metal-bearing solid wastes
(patent protected) and materials handling procedures
based on the needs of each particular site.
For the owner or developer of a contaminated and/or brownfield site, the Retek Process has been shown to represent the rapid, cost effective, environmentally acceptable answer for the management of contaminated soils.
Retek Services Include:
- Waste Characterization
- Treatment
- Assistance with Compliance and Regulatory Issues
- Stabilization
- Containment
- Transport and Disposal
Hazardous Soil Stabilization
The process stabilizes petroleum-contaminated soil with proprietary asphalt emulsion formulations. The process binds the contaminants and renders them environmentally unavailable. For hazardous materials (TCLP), the process uses pozzolanic additives to stabilize the soil.
Process benefits include:
- On-site re-use as paving base
- Economical off-site disposal (significantly less expensive than hazardous waste disposal)
- Daily cover at Subtitle D landfills
- Easily "permitted" because it is conducted at ambient temperatures
On-site uses of stabilized material include
- Landfill cap
- Road base
- Parking lot base
- Structural back-fill material
- Grade and slope material
Dredge Stabilization
United Retek's Dredge Stabilization is cleaning up the Nation's Waterways. From the 1940s to the 1970s, manufacturers discharged wastes containing PCBs and toxic metals into Harbors, resulting in high levels of contamination throughout the waters, sediments and biota of Harbors and Bays. Hundreds of acres of marine sediment were highly contaminated.
Biological effects of
the contamination include reproductive impairment and
death of marine life throughout the estuary, along with
loss of marine biodiversity in areas of high
contamination. The economic impact was severe; due to
long-term fishing closures, lost beach use, 
diminished
property values, and reduced opportunities for coastal
development.
Dredge Stabilization is accomplished by installation of a series of circular steel sheet pile bulkhead cells connected together with steel arcs. Pre-dredging is required prior to cell installation. The dredged spoils are pumped into a series of dewatering tubes located in a constructed water containment/dewatering area. A wastewater treatment plant to remove PCB's prior to discharge into the bay processed water drained from the dewatering tube.
The partially dewatered dredge spoils remaining in the dewatering tube is then stabilized by United Retek. The stabilizing was accomplished by blending Portland Cement with the dredge spoils using our Pugmill process.
The "Retek" process changes the physical and chemical composition of the dredging producing material that now exhibits permanent structural characteristics. The EPA, State DEP, and the Army Corp of Engineers have approved the technology known as solidification/stabilization. The stabilized material, some 10,000 cubic yards was then used as backfill in the swale west of the last cell and behind the bulkhead wall.
Process Summary
The United Retek process can recycle between 500 and 1,200 tons per day depending on the physical composition of the contaminated soil. For large projects, this rate can be readily scaled up to accommodate site needs.
Setup is relatively simple and involves placement of the Retek crusher and pugmill. Room to maneuver an asphalt tank truck and a front-end loader is necessary.
The core piece of equipment is a specially modified pugmill, readily capable of processing 150 tons per hour at 100 lbs. per cubic foot aggregate density.
Screeners, jaw or impact crushers and other miscellaneous earth-moving equipment are utilized as necessary.
Call or email Russell Sattler on 508 478 5500 to discuss the most affordable way we can assist you.
