400 RIVERSIDE RD SEPA 016 - 039 - RIVERSIDE BUSINESS PARK Land Use Decision Documents 2025-04-14

The site was formally utilized as a Weyerhauser paper treatment site and has been filled and graded. The site is currently vacant and covered by non-native invasive plant species. The soils have been leveled and compacted in preparation for industrial development. The proposed project will develop a highly degraded site and establish a more functional buffer along the Snohomish River. ' The proposed project includes the construction of two commercial/industrial buildings with offices, associated utilities, parking, and infrastructure on the 21.9 acre subject property (See Site Plan, Appendix C). Building A is proposed to comprise of approximately 63,100 square-feet manufacturing and 35,000 square-feet office. Building B is proposed to comprise of approximately 70,700 square- feet manufacturing,20,000 square-feet distributing and 20,000 square-feet office. Concurrent with the site development actions,the Port of Everett will restore a 50 foot buffer along the Snohomish River which will include a public access pathway. 2.3 Construction Techniques While the proposed project is on a site which has already been filled,additional filling and grading will be needed prior to construction of the buildings. Temporary Erosion and Sediment Control (11,SC) ' measures consisting of a construction entrance, silt fencing and seeding of disturbed soils will be installed using best management practices (BMPs) outlined in the Stormwater Pollution Prevention Plan (SWPPP) and TESC Plan prepared by the Project Engineer and approved by the City of Everett ' prior to implementation of the remediation actions. Once the entire site has been graded the contractor will move forward with building pads and building construction. The building sites and permanent stormwater facilities will be installed immediately following installation of TESC measures and all grading and road improvements. Equipment used during construction will be typical for land-clearing and grading activities and will be ' kept in good working order free of leaks. All equipment staging and materials stockpiles will be kept out of wetlands, streams, and regulated buffers, and the area will be kept free of spills and/or hazardous materials using a Spill Prevention,Control,and Countermeasure Plan (SPCC)prepared and ' implemented by the contractor. All clean fill material and road surfacing will be sourced from upland areas onsite or from approved suppliers, and will be free of pollutants and hazardous materials. 2.4 Action Area The "Action Area" for evaluation of potential impacts to ESA-listed species encompasses the locations where project activities will occur, plus areas that may be directly or indirectly affected by ' the proposed project either through physical, chemical, or biological mechanisms. The geographic limits of the Action Area were defined by considering the potential spatial extent of mechanisms that may lead to impacts on listed species. Please see Appendix B1 for the Action Area map. At certain levels, noise from project activities can adversely affect wildlife with various behavioral and/or health-related consequences (WSDOT, 2015). Terrestrial noise (transmitted through air) is ' measured in decibels (dB) on a logarithmic scale. Washington Interstate 5,located east of the Project Area,has a fairly high ambient noise level due to substantial traffic.The noise generated by the adjacent traffic was determined by the typical method described in the Washington State Department of Transportation (WSDOT) guidance manual. The Annual Traffic Report was used to identify the Average Daily Traffic (ADT) at a nearby station from milepost 194.56 A to 198.6 A of Interstate 5. Interstate 5 was chosen as the highest ambient noise level as SR 529 at the Snohomish River Bridge Soundview Consultants LLC December 8,2016 1413.0003 Riverside Business Park—FEMA ESA Habitat Assessment Report Page 4