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iv. The Permittee may exclude from the initial selection any optimization <br /> strategy considered but found to exceed a reasonable implementation <br /> cost or timeframe. Documentation must include an explanation of the <br /> rationale and financial criteria used for the exclusion determination. <br /> b. Initial Selection. By December 31, 2022 identify the optimization strategy <br /> selected for implementation. <br /> Document the expected %TIN removal (or the expected reduction in effluent <br /> load) for the optimization strategy prior to implementation. <br /> 2. Optimization Implementation <br /> Permittees in Table 11 must document implementation of the selected <br /> optimization strategy (from S6.B.1.b) as it is applied to the existing treatment <br /> process during the reporting period. Permittees must document adaptive <br /> management applied to optimization strategies following initial implementation <br /> through the permit term. <br /> a. Strategy Implementation. Describe how the selected strategy was <br /> implemented during the reporting period, following permit coverage. <br /> Including: <br /> i. Initial implementation costs. <br /> ii. Length of time for full implementation, including start date. <br /> iii. Anticipated and unanticipated challenges. <br /> iv. Any impacts to the overall treatment performance as a result of process <br /> changes. <br /> b. Load Evaluation. Each Permittee listed in Table 11 must review effluent data <br /> collected during the reporting period to determine whether TIN loads are <br /> increasing. <br /> i. Using all accredited monitoring data, determine the facility's annual <br /> average TIN concentration and load for each year during the reporting <br /> period. <br /> ii. Determine the treatment plant's TIN removal rate at the end of each <br /> year. Compare the removal rate with the pre-optimization rate identified <br /> in S6.B.1.a.i. <br /> c. Strategy Assessment. Quantify the results of the implemented strategy and <br /> compare to the performance metric identified in S6.B.1.b. <br /> If the TIN loading increased, apply adaptive management, re-evaluate the <br /> optimization strategies and the resulting performance to identify the reason. <br /> Select a new optimization strategy for implementation and/or revise <br /> implementation for better performance. Document any updates to the <br /> implementation schedule and overall plan. <br /> Puget Sound Nutrient General Permit Page 29 <br />