2020/11/18 Council Agenda Packet

c. If the assessment unit representing the basin is greater than twice the basin within City limits, a qualitative analysis will be done to verify that the PSWC goals are reasonable, based on known information about water flow and water quality. It is assumed that up to four basins will need this analysis. d. Basins which have a goal of restoration or protection and a high influence rating from Task 230, will then be listed in the Task 300 memorandum to include in the receiving water prioritization process. Assumptions • Management strategies will be adopted from PSWC unless assessment unit is more than twice the area of the basin within City limits. • Up to four basins do will be qualitatively assessed to verify that the PSWC goals are reasonable. One watershed map showing basin management strategies will act as a "pilot" with two rounds of review, and the final approved cartography will be applied to remaining watersheds to create maps that will undergo one round of review. • Up to two workshops with the City to decide which water quality and flow elements should be picked to be representative for basins. Deliverables Otak • Workshops (2) with City on MS Teams to decide which representative water quality and flow elements should be considered for the assignment of management strategies for each basin. • Table summarizing the management strategies for each basin documented in chapter 2 of each watershed plan. • Pilot management strategies map for one watershed map (draft). • Pilot management strategies map for one watershed (final with up to two rounds of review). • Remaining management strategies maps (2) (final with one round of review). • One table summarizing management strategies for all 22 basins for Task 300 memorandum. • List of basins to be considered in the basin prioritization process in the Task 300 memorandum 300 Receiving Waters Assessment Memorandum Otak will document the rationale for the influence ratings, and management strategies for each basin in a Receiving Waters Assessment memorandum. The memorandum will be suitable for informing decision -makers about the process and conclusions and will be suitable for submittal to Ecology to meet the Receiving Water Assessment requirement of the Phase II permit (S5.C.1.d.i). This memorandum will have the following sections: 1. Introduction 2 Receiving Waters Inventory a. Inventory methodology b. Includes a table of receiving waters with contributing watershed area within Everett and outside of Everett and a percentage of the total watershed area within the City 3. Stormwater Management Influence (SMI) a. SMI Methodology 4. Receiving Waters Assessment a. Includes a table with all basins summarizing the following information: pollutants of concern, point sources related to pollutants of concern, nonpoint sources related to pollutants of concern, stormwater management influence score for flow and water quality, and basin management strategies b. Basin Management Strategy Methodology c. Candidate Basin Selection Description Receiving Waters Assessment and Update of Surface Water Comprehensive Plan Scope of Work 7 Otak