5001 23RD AVE W Geotech Report 2022-10-25

owner is completely responsible for taking all risks associated with any future potential for instability at the site or in the site vicinity. Life Safety Risk Assessment: We evaluated available historic aerial photographs and published maps including geologic maps, USGS quadrangles and topographic maps, and City GIS data. The ancient landslide mass is either inactive or has a slide movement characterized as`extremely slow (less than 1ft / 5 years)' in accordance with Transportation Research Board (TRB Special Report 176) classification. However, the landslide terrain and the vicinity area are such that, under normal conditions, there exists some potential for a future global slope failure, based on the slopes, distance to the fault zones, local geology, and especially if excessive cuts or grading or roads or extensively modifications of the terrain by anthropogenic activity, and forest loss occurs. In our opinion, the life safety risk to the occupants from such a slide can be accurately determined only by performing an extensive study involving extensive subsurface explorations, installation of inclinometers, detailed slope stability analyses, and detailed risk analyses. There is a likelihood of the occurrence of an event of a size and in a location that would cause casualties, damage, or disruption to an existing standard of safety at the site, especially during a seismic event; although a detailed slope stability analyses under seismic conditions was beyond our scope of services. The project site is located close to the landslide-prone area, and thus the expected location and extent of the effects of the reactivation of any ancient slides on the site area including on-site structures exists. The anticipated severity of the ancient landslide reactivation effects on the on-site structures and future structures can be determined only by performing extensive subsurface explorations and detailed slope stability analyses under static and seismic conditions. Limitation of Liability: Historically, with construction in such areas, there is always an inherent high risk associated with ground movement and/or settlements and related structural damage. Again, it is important that the owner understands these inherent high risks. The owner is completely responsible for taking all risks associated with any future potential for instability at the site or in the site vicinity. There has been a certain amount of variability in legal interpretations of liability of geotechnical engineers and geologists in regard to landslide-related losses; but the conclusions reached are general in nature and not necessarily valid in any specific court. Liability of geotechnical engineers and engineering geologists for landslide damages to home sites is based most often on the theory of negligence and occasionally on negligent misrepresentation. Although allegations seeking to recover damages from geotechnical engineers and geologists on the basis of strict liability, breach of warranty, or intentional misrepresentation are often included in a complaint,they are not usually Project No: 0314-WA19 August 07,2019 Page No-5-et i 2