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

To accommodate the proposed development, the applicant is proposing to eliminate the four on - site wetlands, comprising a total of 0.25 acres (10,823 square feet). Avoidance of wetland impacts would make the project economically infeasible by not allowing for the mass grading that is required to balance the grades on site. Mitigation for eliminating the four small on -site wetlands is proposed through the use of mitigation banking. The subject site is 39.45 acres in size. Approximately 33 acres will be developed with the remaining 5.96 acres being undeveloped steep slope in the southwestern portion of the property. This area may be developed in the future under a separate permit action. 4.4.1 Road Improvements Internal drive aisles and parking are proposed to be placed within the developed portion of the site. Other minor work will occur in the existing cul-de-sac at the terminus of 36th Avenue West to provide level access to the site. No other road improvements are proposed. 4.4.2 Stormwater Approximately 33 acres of the 39.45-acre site will be developed as industrial manufacturing buildings and associated utilities, parking, stormwater facilities, and access roads. New impervious surfaces will total approximately 26 acres. There are currently four drainage areas existing onsite, as shown in Figure 4. The western -most portion of the site to be developed (Pre -Basin A) drains the western portion of the site down to Japanese Gulch Creek. The northwestern drainage area (Pre -Basin B) drains north into an intersecting ravine which leads into a series of existing stormwater conveyance features that eventually discharge into the ravine above Edgewater Creek. The northeastern drainage area (Pre -Basin C) drains to the northeast into a ravine that shallows out and is intersected by a drainage ditch leading into Edgewater Creek. The southeastern drainage area (Pre -Basin D) contains Wetlands A-C, and is hydrologically sourced from the off -site area to the south (Pre - Basin C Run -On). Runoff currently outlets from Wetland A into a catch basin, under 36th Avenue West via a culvert that flows to an existing stormwater conveyance ditch on the neighboring property. Biological Evaluation 18 WRI #14109 Soundview Business Campus Revision #2: October 2, 2015