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iv. Anticipated results from the proposed approach including expected <br /> effluent quality; <br /> v. Certification by a licensed professional engineer. <br /> a. If a Permittee exceeds an action level two years in a row, or for a third year <br /> during the permit term, the Permittee must begin to reduce nitrogen loads <br /> by implementing the proposed approach submitted per S4.D.2 following <br /> Ecology's written approval of the proposed approach and implementation <br /> schedule. <br /> b. Submit an update to the Permittee's Operation and Maintenance Manual no <br /> later than 6 months following implementation. <br /> E. NUTRIENT REDUCTION EVALUATION <br /> 1. All permittees in Table 5, except for those who meet the exclusions listed in this <br /> paragraph, must prepare and submit an approvable Nutrient Reduction <br /> Evaluation (NRE) to Ecology for review by December 31, 2025. Permittees with <br /> multiple plants may submit a combined report. This combined report must <br /> include an evaluation for all plants owned and operated by the jurisdiction. <br /> Permittees that maintain an annual TIN average of< 10 mg/L and meet their <br /> action level throughout the permit term must submit a truncated NRE that <br /> satisfies S4.E.3-S4.E.5. Permittees that meet their action level throughout the <br /> permit term, maintain an annual average of< 10 mg/L TIN and a seasonal <br /> average of< 3 mg/L do not have to submit the NRE. <br /> 2. The NRE must include an all known, available and reasonable treatment (AKART) <br /> analysis for purposes of evaluating reasonable treatment alternatives capable of <br /> reducing total inorganic nitrogen (TIN). It must present an alternative <br /> representing the greatest TIN reduction that is reasonably feasible on an annual <br /> basis. <br /> 3. In addition, the NRE must assess other site-specific main stream treatment plant <br /> upgrades, the applicability of side stream treatment opportunities, alternative <br /> effluent management options (e.g., disposal to ground, reclaimed water <br /> beneficial uses), the viability of satellite treatment, and other nutrient reduction <br /> opportunities that could achieve a final effluent concentration of 3 mg/L TIN (or <br /> equivalent load reduction) on seasonal average (April—October) basis. <br /> Puget Sound Nutrient General Permit Page 16 <br />