11831 AIRPORT RD WHOLE SITE FILE Geotech Report 2022-10-25

■ directing runoff away from denuded areas, • minimizing the length and steepness of slopes with exposed soils, • decreasing runoff velocities, • preparing drainage ways and outlets to handle concentrated or increased runoff, • confining sediment to the project site, and ■ inspecting and maintaining control measures frequently. Temporary erosion protection should be used and maintained in areas with exposed or disturbed soils to help minimize erosion and reduce transport of sediment to adjacent areas and receiving waters.Permanent erosion protection should be provided by re-establishing vegetation by hydroseeding or landscape planting. Until the permanent erosion protection is established and the site is stabilized, site monitoring should be performed by qualified personnel to evaluate the effectiveness of the erosion control measures and repair and/or modify them as appropriate. Provisions for modifications to the erosion control system based on monitoring observations should be included in the erosion and sedimentation control plan. LIMITATIONS We have prepared this report for the exclusive use of the Community Transit and Otak,Inc.and other project team members for the Swift II BRT project in Snohomish County,Washington.The data should be provided to prospective contractors for their bidding or estimating purposes, but our report and interpretations should not be construed as a warranty of the subsurface conditions. Within the limitations of scope,schedule and budget, our services have been executed in accordance with generally accepted practices in the field of geotechnical engineering in this area at the time this report was prepared. No warranty or other conditions, express or implied,should be understood. Any electronic form, facsimile or hard copy of the original document (email, text,table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. Please refer to Appendix E titled "Report Limitations and Guidelines for Use" for additional information pertaining to use of this report. REFERENCES American Association of State Highway and Transportation Officials, "LRFD Bridge Design Specifications, 7th Edition,"2016. International Code Council, "2015 International Building Code,"2015. Minard,J. P., 1985, "Geologic Map of the Bothell Quadrangle,Snohomish and King Counties,Washington," United States Geological Survey, Miscellaneous Field Studies Map MF-1747. GEOENGINEERS_O April 14,2017 Page27 Ale No.2095-032-00