2600 FEDERAL AVE 2021 PORT OF EVERETT 2025-09-29

1q:1 Consulting Engineers Page 7 of 13 Minimum Requirement#2: Construction Stormwater Pollution Prevention Plan (SWPPP): The Port of Everett will generate a Construction SWPPP for this work to be coordinate through the Department of Ecology.The SWPPP will be transferred to the selected Contractor to own and update for the duration of construction.Temporary Erosion and Sediment Control measures will be maintained from the previous work under a separate construction project including a perimeter berm constructed along the shoreline. Due to the existing site surface conditions, no stormwater runoff or dewatering water generated during construction will be discharged to Port Gardner Bay. Stormwater runoff or dewatering water generated during construction will be infiltrated,just as it has since the former Kimberly-Clark site was demolished in 2012. Additional TESC BMPs will include debris booms around the proposed outfall locations, pavement sawcutting protection, storm drain inlet protection, and soil erosion and stockpile perimeter protection.Trucks will be cleaned before leaving the site to minimize the tracking of sediment on public roads. Minimum Requirement#3: Source Control of Pollution: Existing utilities have been demolished or abandoned as part of the interim action clean-up work. The project site will be installing new stormwater collection, conveyance, and treatment systems for the redevelopment of the site for cargo laydown and storage.The Port of Everett will be filing an NOI with the Washington State Department of Ecology for coverage under the National Discharge Elimination System (NPDES) Industrial Stormwater General Permit (ISGP). Minimum Requirement#4: Preservation of Natural Drainage System and Outfalls: The existing site currently infiltrates all stormwater runoff due to the interim clean-up action.The existing conveyance and collection system has been abandoned or demolished, and all but two existing outfalls have been plugged and abandoned. As part of the redevelopment of the site, Outfall A and M will be replaced and upsized due to the existing condition, as well as the additional area now being sent through each outfall. The drainage area associated with Outfall M will be graded such that all stormwater runoff will flow to a series of trench drains and catch basins. The drainage area associated with Outfall A will generally remain the same, consisting of existing asphalt, warehouse roof, and additional area graded to drain to catch basins and conveyed to Outfall A. The drainage area associated with Federal Avenue Basin 1 will be collected for treatment and will be tight-line to Outfall A. The drainage area of Federal Avenue Basin 2 will be unaltered. Minimum Requirement#5: On-Site Stormwater Management: The Norton Terminal will be a fully developed, 45.37 acre facility with a new stormwater collection, conveyance and treatment systems. The paved area planned for this project is roughly 29.68 acres. The full build out is intended to pave the entire area to minimize infiltration due to environmental concerns.