Client: Oil Company
Project Location: Central Alabama
Project Cost: $170,000
Remtech Engineers was engaged by the corporate environmental engineering department of a Fortune 100 Energy Corporation to design a groundwater treatment plant for leachate generated from a chemical waste landfill in Alabama.
A waste impoundment was closed by constructing an engineered storage facility. Bentonite slurry walls were constructed down to bedrock. Solidification agents were introduced to stabilize wastes. Gas vents, and a High Density Polyethylene Liner was installed to prevent surface water infiltration. A cap was constructed over the landfill with final elevations above the 100-year flood plain. Fourteen, two-foot diameter PVC extraction wells were installed in the cap. The extraction wells were drilled on the inside and outside of the slurry wall to intercept and treat leachates from the landfill and to direct upgradient groundwater around the storage facility.
A four-inch PVC collection gallery connected the north and south extraction well network. Submersible pumps were placed in the bottom of each well (with flow totalizers) to produce extraction rates of 50 gallons per minute. The north and south galleries were connected to single phase control panels to facilitate single or multiple pumping operations. The collection gallery initially drained into an existing onsite concrete retention basin.
Remtech evaluated alternative functional designs and prepared detailed plans, specifications, material takeoffs, and contract/bid documents in a 60-day period. This plant was constructed in a 8-month period and is fully permitted and operational. Remtech Engineers also trained plant operations personnel.
The plant was designed to operate as a physico-chemical and/or extended aeration treatment system in a batch or continuous mode. Treatment capacities are expandable from 10,000 to 75,000 gallons per day.
Remtech Groundwater Treatment System
Bentonite Slurry Wall, Cap, and Leachate Control Wells
Treatment Includes Phys/Chem and Extended Aeration