5900 36TH AVE W SEPA 015 - 034 - SOUNDVIEW BUSINESS CAMPUS - VERITAS Land Use Decision Documents 2025-04-22

buildings will be discharged into the public sanitary sewer system. c. Water runoff (including stormwater): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. Onsite stormwater runoff from the new impervious surfaces will be collected and conveyed to detention vacilities (underground vaults) via catch basins, pipes, and swales. Prior to the detention vaults, the pollution -generating impervious surfaces (parking, roads) will pass through a water quality treatment vault sized to meet the requirements of the City of Everett. The proposed detention vaults will release storm water at the natural points of discharge at the northwest, northeast, and west. 2) Could waste materials enter ground or surface waters? If so, generally describe. No. 3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. No. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: Storm water detention facilities will be designed and constructed to meet the requirements of the City of Everett and the Washington State Department of Ecology flow control requirements. Roof drainage from the buildings will be tight - lined to the conveyance system. 4. Plants a. Check the types of vegetation found on the site: X deciduous tree: X evergreen tree: X shrubs grass pasture crop or grain alder, maple, aspen, other fir, cedar, pine, other _ Orchards, vineyards or other permanent crops. X_wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other _water plants: water lily, eelgrass, milfoil, other SEPA Environmental checklist (WAC 197-11-960) May 2014 Page 7 of 16