Arlington, VA – PC Construction, a leading environmental design-build contractor on the East Coast, and Stantec, its lead design partner and global consulting and engineering firm, have been selected to design and construct a major biosolids upgrade project for the Arlington County Water Pollution Control Plant (WPCP) in Northern Virginia. The progressive design-build project, totaling approximately $175 million, will upgrade solids handling facilities and incorporate cutting-edge technology to sustainably transform wastewater to a renewable energy source and a nutrient-rich soil amendment.

PC and Stantec will work together to design and construct the thermal hydrolysis process (THP), pre- and post-dewatering facilities, primary and secondary anaerobic digesters, odor control, biogas treatment systems and steam generation. THP will allow the WPCP to produce Class A biosolids that can be used as fertilizer and the resulting biogas will be captured, treated and used as a renewable energy source.

The design-build team is a leader in these specialized facilities, combining PC’s construction experience—including the largest THP facility in the world—with Stantec’s history of designing nearly half of the world’s THP facilities. PC and Stantec are currently in the commissioning phase for WSSC Water’s Piscataway Water Resource Recovery Facility Bioenergy Project, which will be one of only five operating THP facilities in the US.

“This is an incredibly important project for Arlington County and the community,” said Matt Cooke, President / CEO at PC Construction. “THP technology is quickly gaining traction in the US as an effective, energy efficient, and sustainable method for managing wastewater biosolids. We are excited to put our expertise in this innovative field to work to help Arlington County achieve its long-term vision.”

“The opportunity to work with Arlington County on this groundbreaking project is significant,” said Nicolle Boulay, vice president at Stantec. “The County’s priorities around sustainability align very well with Stantec’s, and we look forward to helping the County achieve its goals.”

Building on Arlington County’s Solids Master Plan, this project will help reduce greenhouse gas emissions in the region and generate negative net energy usage. Completion is projected by the end of 2029.

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The LEED Silver certification recognizes the practical and measurable sustainable strategies and solutions incorporated into the design and construction, specifically in the areas of sustainable site development, water savings, energy efficiency, materials selection and indoor environmental quality. In addition, the STEM project diverted nearly 97% of construction waste from landfills, earning an exemplary rating in that category.

The $80 million award-winning project involved the construction of two new buildings: the 120,000-square-foot Discovery Building housing teaching and research labs and the 75,000-square-foot Innovation Building with modern classrooms and offices. The facilities provide UVM with 20 new state-of-the-art teaching labs, seven media-rich classrooms, cleanrooms, faculty labs, microscopy and other technical spaces.

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PC served as construction manager throughout the multi-phase project, which came about after the existing complex was severely damaged by flooding from Tropical Storm Irene. When officials decided to rebuild, they focused on safeguarding the new complex from future damage and building a sustainable and eco-friendly environment for their workers.

The project included the deconstruction of 21 flood-prone buildings; construction of a new 86,000-square-foot, two-story office building and 20,000-square-foot central plant with wood-fired biomass boilers; and more than 100,000 square feet of renovations to 13 historic core buildings originally constructed in the 1890s.

The new office building features a 110kWp rooftop solar array and the new central plant uses 25% less energy than the original. As a whole, the project diverted 94% of demolished materials from landfills through reuse and recycling, and locally sourced materials were widely used throughout. Many other features, including lighting sensors and energy efficient walls and windows contributed to the LEED ratings.

The complex is only the 13th project in the state of Vermont to earn LEED Platinum status.

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