625 RIVERSIDE RD SEPA 016 - 028 - FREIGHT HANDLING FACILITY Land Use Decision Documents 2025-04-21

f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Soils exposed during grading activities are subject to erosion unless protected. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? Approximately 95% of the site will be covered by impervious surfaces when complete. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Best Management Practices will be employed to reduce or eliminate soil erosion, including protection of temporarily exposed soils, and use of silt fences, rock check dams, and temporary erosion control ponds. 2. Air a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. Exhaust emissions will occur from construction equipment used during construction, and from employee, vendor, and truck traffic once the site is constructed. Some dust may be created during construction. b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. No. c. Proposed measures to reduce or control emissions or other impacts to air, if any: No specific measures are proposed by the project applicant, but it is assumed that all vehicles will employ technology currently mandated for reduction of exhaust emissions. Dust generation will be controlled if required by wetting of exposed soils subject to construction traffic. Subsequent to construction, Tenant's diesel fueled vehicles utilized in their operations are equipped with DEF injectors to aid in the reduction of NOx emissions. 3. Water a. Surface Water: 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. The Snohomish River lies directly east of the subject site. SEPA Environmental checklist (WAC 197-11-960) July 2016 Page 5 Of 17