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

4 Collaborate with the City to develop a flexible strategy that reflects the City’s site-specific challenges, facilitates compliance, and provides a practical schedule with adequate time to implement improvements in an affordable manner. Maintenance of plant operations (MOPO), asset management renewal and replacement needs, and the City’s other regulatory requirements need to be considered in an integrated plan for meeting the PSNGP. Key activities for Ongoing Optimization and Annual Report Support are as follows: • Collaborate with City staff to plan, organize, design, implement, etc. the continuation of optimization activities for the calendar year 2023. Planning should include activities associated with expanded treatment process monitoring, bench scale testing, potential pilot studies, supplemental carbon addition, swing zone modifications, full-scale testing of concepts for nitrogen reduction within the existing facilities, as well as modifications to existing facilities, effluent polishing, modifications to the Water Research Foundation (WRF) testing trailer, etc. The target period for implementation of selected activities is the summer of 2023. o Assist the City with selection of design and sizing criteria, process simulations, and other technical analyses to forecast potential operational characteristics and performance. Develop performance objectives to be used for comparison with subsequent optimization testing and for reporting under the PSNGP. • Receive treatment process monitoring data from the City for the entire calendar year of 2023 in early January 2024 including City staff operating conditions records, City documented expenditures and staff time devoted to optimization, etc. (January 2024). • Analyze the entire calendar year of 2023 treatment process data and document the associated operational conditions. Re-calculate nitrogen discharge loadings to the Snohomish River and Puget Sound. o Compare to PSNGP Action Level for Everett. o Determine whether or not any corrective action triggers require near-term attention according to the PSNGP. • Meet with City staff to review calendar year 2023 operations and treatment performance data analysis (January 2024). • Meet with the City to extract selected content from the Working Draft Nutrient Optimization Plan for inclusion in the Second Annual Report (January 2024). • Formulate the Second Draft Annual Report (February 2024). • Meet with the City to review Second Draft Annual Report (February 2024). • Revise and update the draft Annual Report and prepare for submittal to Ecology (March 2024). Similar activities would be repeated for subsequent years of optimization (calendar years 2025 and 2026) under the PSNGP until the end of the initial 5-year permit cycle on December 31, 2026. 1.5 Develop Nutrient Reduction Evaluation (NRE) The PSNGP calls for a Nutrient Reduction Evaluation (NRE) to be submitted to Ecology for review by December 31, 2025. The NRE must assess site-specific main-stream treatment plant upgrades, the applicability of side stream treatment opportunities, alternative effluent management options, the viability of satellite treatment, and other nutrient reduction