Located about 70 miles north of Seattle on the picturesque Puget Sound, Tesoro’s Anacortes refinery has a total crude-oil capacity of 120,000 barrels per day. The refinery primarily supplies gasoline, jet fuel, and diesel to markets in Washington and Oregon. They also manufacture heavy fuel oils, liquefied petroleum gas, and asphalt. With the increase in crude oil production from the Bakken Formation, Tesoro has started construction on a rail shipping project that will bring an estimated 30,000 barrels per day to the Anacortes refinery compared to the current 1,000 to 2,000 barrels per day. To handle the additional rail volume, Tesoro is upgrading their rail car unloading facility. The 44-acre expansion project is adjacent to Padilla Bay, a sensitive water body connected to the Puget Sound. Prior to project award, WaterTectonics partnered with general contractor Granite Construction to identify project needs and develop a strategic stormwater management plan. This deliverable played a critical role in the selection process and award orchestrated by design/build firm Haskell. WaterTectonics assisted with regulatory submittals, prepared a site-specific Stormwater Management Plan, and implemented a 300gpm WaveIonics electrocoagulation system.