Bartley, NE - The Ag Valley Cooperative received bids on May 16th, 2006 for the construction of a dual soil vapor extraction and hydraulic control remediation system. Contamination caused by leaking underground petroleum storage tanks at the local cooperative threatened the Village of Bartley's wells. The project, funded by the Nebraska Department of Environmental Quality's Title 200 Program, called for an aggressive design and construction schedule to address the problem before the city wells were affected.
The first phase of this remediation project included the installation of monitoring wells to determine the extent of the problem. Upon learning the scope of the contamination, a remedial system, designed by Olsson Associates, called for the construction and installation of a dual remediation system. Thirty-one soil vapor extraction wells were connected to a building, which housed a soil venting system. An oxidizer was also connected to the venting system to burn off excessive hydrocarbons. In addition to the soil vapor extraction wells, two ground water recovery wells were connected to a tray type air stripper housed in a separate building. The stripper removes and transfers contaminants to the air by allowing the water to pass over a series of aeration trays. Once the water is treated, it gravity flows in nearly 1,800 feet of pipe to a nearby creek for discharge.
This successful environmental remediation project was unique for a variety of reasons including, but not limited to, the connection of a large number of wells to a dual remedial system, the quick response time, and the cooperation of several entities. According to Jennifer Hoevet, project engineer for Olsson Associates, "Coordination among the different agencies and stake holders presented a challenge throughout the project." Ongoing communication was essential for the work to proceed. The Nebraska Department of Roads, Red Willow County, Village of Bartley, Nebraska Department of Environmental Quality, private landowner, Olsson Associates, and General Excavating all worked together from the beginning to ensure the successful completion of this remediation project.
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