PFAS Data Analysis, Mass Balance, and Flow Loading Modeling

The contract requires comprehensive quantitative analysis of per- and polyfluoroalkyl substances PFAS mass balance throughout the wastewater treatment process, focusing on tracking mass flow from influent to effluent, partitioning into biosolids, and calculating flow-based loading rates. The work demands rigorous data collection and modeling to quantify the distribution and movement of PFAS compounds across treatment stages, ensuring accurate representation of contaminant fate and transport. Detailed visualizations and trend analyses must be delivered to support regulatory reporting, enabling decision-makers to understand performance, identify hotspots, and evaluate mitigation strategies. The analysis must be conducted with precision to meet potential compliance obligations, using validated methods to ensure data integrity and reproducibility. All findings, including graphical representations and interpretive summaries, are intended for formal submission to regulatory bodies. The procurement is structured as a subcontract under NAICS code 541690 and is issued by the City of Spokane, with responses due by August 4, 2026. While no set-aside provisions or point of contact details are provided, performance is expected to align with the operational and reporting needs of the city’s wastewater management and environmental compliance programs.