HDR Engineering, Inc. 1/20/2023 - Laserfiche WebLink

5 opportunities that could achieve a final effluent concentration target of 3 mg/L TIN (or equivalent load reduction) on seasonal average (April – October) basis. Key elements to be addressed in the NRE include: • Wastewater characterization • Treatment Technology Analysis • Economic Evaluation • Environmental Justice (EJ) Review • All Known, Available and Reasonable Treatment (AKART) analysis for purposes of evaluating reasonable treatment alternatives The PSNGP includes specific requirements for EJ review in the NRE for evaluating treatment alternatives capable of reducing nitrogen discharges. Recent legislation in Washington in the Healthy Environment for All (HEAL) Act requires EJ review that covers seven state agencies including Ecology and the Puget Sound Partnership. Key activities to support preparation of the Nutrient Reduction Evaluation (NRE) are as follows: • Review historical City facilities planning reports, treatment process studies, etc. to determine relevant information that may inform full-scale nitrogen removal planning or might be incorporated into the NRE (2023). • Conduct a meeting with City staff to discuss nitrogen removal options in light of the optimization efforts, annual reports, etc. in order to outline basic options for nutrient reduction for further study and development in the NRE (2023/24). • Prepare detailed work plan for development of the NRE including alternatives for a final effluent concentration target of 3 mg/L TIN for main-stream treatment, side- stream treatment, alternative effluent management options, satellite treatment, and other nutrient reduction options. Develop an approach to the AKART analysis and EJ review (2023/24). o Focus on unique site-specific circumstances for Everett that are distinct and inform Everett-specific considerations of AKART analysis and EJ review. • Conduct nutrient reduction alternatives analysis, conduct workshops with City staff to collaborate on the monetary and non-monetary analysis of alternatives, and select the preferred alternative or multiple alternatives (2024/25). o Formulate a phased implementation plan that reflects a practical and affordable schedule for the preferred alternative(s). The phased implementation plan may be formulated as an Integrated Plan, as codified in the Clean Water Act in 2019, that allows consideration of local priorities and affordability to guide water quality management efforts and address the competing demands of compliance with multiple regulatory requirements. This CWA Amendment provides for compliance with effluent limits over multiple NPDES permit cycles and informs compliance schedules in NPDES permits (2024/25). Assumptions • The City will provide written conflict-resolved review comments on the 2022 draft Optimization Plan. • The City will provide water quality monitoring data from the treatment processes, as well as