Washington Department of Ecology 7/27/2023

Page 11 of 46State of Washington Department of Ecology Agreement No: Project Title: Recipient Name: WQC-2023-EverPW-00118 Regional Stormwater Facility Planning City of Everett SCOPE OF WORK Task Number:3 Task Cost: $207,389.00 Task Title:Regional Facility Selection Task Description: The RECIPIENT will identify, prioritize, and rank locations for regional stormwater facilities. A.The RECIPIENT will conduct a review of available data to address the metrics identified in Task 2. Data reviewed will include a desktop Geotechnical review of surface and depth infiltration capabilities, review the Water Quality Atlas and Watershed Characterization Tool, and current land use compared to possible rezoning and development due to projected population growth. B.The RECIPIENT will evaluate existing water quality and flow control information to determine primary pollutant sources , connectivity to impaired water bodies, and contributing areas. The RECIPIENT will rate the effectiveness of the existing facilities to meet current stormwater standards and will consider the feasibility of expanding effective existing facilities . The RECIPIENT will produce a map with the evaluation findings. C.The RECIPIENT will identify alternatives for potential locations for new water quality and flow control facilities based on an analysis of subbasins, outfalls, and receiving waters. The RECIPIENT will produce a map with the evaluation findings . D.The RECIPIENT will rank the facility alternatives based on the metrics developed in Task 2. The RECIPIENT will select at least five facilities for advancement to conceptual design. E.The RECIPIENT will prepare a Regional Facilities Report. The report will document the drainage basin evaluations, map the potential facility sites, investigate funding options for the regional facilities, and document the efforts for facility prioritization for at least five alternatives. Task Goal Statement: The RECIPIENT will evaluate available geotechnical data and existing facilities to assist in ranking of facility options and will prepare a Regional Facilities Report and respond to ECOLOGY comments in a timely manner . Task Expected Outcome: The project will produce a map with evaluation findings and will select at least five alternatives to move forward for conceptual design. Template Version 12/10/2020 DocuSign Envelope ID: 2DF45A90-96AE-464E-848B-4CA1529CAE01