Built in the early 1970s, the Water Pollution Control Plant Northside Facility in Danville, Va., is responsible for treating both domestic and industrial
waste. This facility has the capacity to treat up to 24 million gal per day. In 2009, the existing 325,000-sq-ft treatment pond, lined with unsupported PVC, had deteriorated beyond repair and needed to be replaced with a new liner system.
Stimulus money earmarked for high-priority projects in Virginia allowed the Northside Facility to evaluate various options in order to completely reline the 7.5-acre pond. The design firm, Dewberry, selected XR-3 by Seaman Corp., a high-performance, 30-mil reinforced geomembrane.
The geomembrane, based on XR technology utilizing ethylene interpolymer alloy (EIA), was chosen for its long-term performance in wastewater facilities. These geomembranes consistently demonstrate ultraviolet and weathering resistance in harsh climates. The XR-3 provides higher strength properties than unsupported geomembranes that are more than twice as thick. In an effort to minimize field seams, Dewberry specified large prefabricated XR-3 panels, up to 20,000 sq ft each, for the installation.