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City of Everett <br />Receiving Waters Assessment and Update of Surface Water <br />Comprehensive Plan <br />Exhibit A - Scope of Work <br />Otak Project 33335 <br />October 30, 2020 <br />Project Understanding <br />The City of Everett published a Surface Water Comprehensive Plan (SWCP) in 2017. <br />Since that time, the Phase II NPDES Municipal Stormwater Permit was re -issued and became effective on August <br />1 2019. It requires the City to develop a Stormwater Management Action Plan (SMAP). The SMAP must be for a <br />high prionty catchment that outlines strategies and projects to improve the quality of the receiving water. The first <br />steps of this process are described in Ecology's Stormwater Management Action Planning Guidance document <br />(SMAP Guidance) section titled Receiving Water Conditions Assessment Everett has applied for an Ecology <br />grant to complete the subsequent Receiving Water Prioritization and Stormwater Management Action Plan. <br />Since adoption of the SWCP, additionally, local and state agencies have published plans and studies related to <br />riparian and aquatic habitat conditions near Everett Water Resource Inventory Area (WRIA) 7 and 8 plans have <br />been updated, the City has made changes to its separated and combined sewer systems resulting in two new <br />separated stormwater basins, and some stormwater capital improvements from the SWCP have been completed. <br />The City has requested Otak's assistance to update the SWCP to incorporate new information as described <br />above and to develop and document methodologies relating to the SMAP Receiving Water Conditions <br />Assessment. <br />For this scope of services, Otak will update the gaps between the processes and steps defined in the SMAP <br />Guidance section titled the Receiving Water Conditions Assessment (steps 1 through 4) and the narrative in the <br />SWOP. It is assumed that water flow and habitat are sufficiently assessed in the SWCP for SMAP analyses. In <br />basins where separate water flow and habitat sections do not exist in the 2017 SWCP they will not be added. <br />The SWCP will be updated to provide a more detailed analysis of existing and future land uses as they relate to <br />water quality, an analysis of the influence of Everett's Municipal Separate Storm Sewer System (MS4) on the <br />receiving water, and an assessment of the relative conditions of the basins within the city. <br />Additionally, Otak will write basin plans for the two additional separated stormwater basins - Waterfront and <br />Riverside <br />New CIPs identified by the City will be added to the SWCP and scored using the existing metric. <br />This project will be done in close collaboration with City staff, and City staff will take the lead on some tasks that <br />are crucial to completing the scope of services. The scope of services identifies those tasks the City has agreed <br />to perform. <br />Project Guidance/Reference Documents include: <br />1. Project scoping meetings, emails and telephone calls between the City of Everett and Otak on October <br />2nd, 2020, October 19th — October 21st, 2020 <br />Receiving Waters Assessment and Update of Surface Water Comprehensive Plan <br />Scope of Work <br />1 <br />Otak <br />