The project included construction of a new coarse screening structure and influent pump station, both of which operate under continuous exposure to wastewater, hydrogen sulfide, and aggressive microbial conditions. To address the risk of microbial induced corrosion (MIC) and ensure long-term concrete durability, Xypex Bio-San was incorporated directly into the concrete mix supplied by Thomas Concrete and placed by Donley’s Inc. 

Bio-San’s integral crystalline waterproofing technology permanently seals capillaries and micro-cracks while its antimicrobial component inhibits the growth of acid producing bacteria commonly found in wastewater environments. By integrating Xypex Bio-San into the new process structures, the project team eliminated the need for external linings or coatings while achieving long-term protection against water ingress and corrosion. The Xypex crystalline system provides a permanent and low maintenance solution supporting investment from the Town of Pendleton in durable, resilient wastewater infrastructure designed to serve the region for decades.