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Potential Consequences of Liquefaction or Secondary Liquefaction Included Hazards Potential consequences of liquefaction or secondary liquefaction included hazards generally consists of differential settlement (vertical deformations), lateral movement/lateral spreading (horizontal deformations), oscillation, and reduction in foundation soil-bearing capacity (bearing failure). A sloping condition or drainage or stream channel does not exist at the site; therefore, lateral movement/lateral spreading, oscillation, etc. due to potential liquefaction are not anticipated to be credible hazards for the proposed new structure. In general, based on our experience, differential settlement due to liquefaction (and reduction in foundation soil-bearing capacity) is roughly estimated to be about 1/4 inch (for a horizontal distance of 30 feet). Please note that this is only a rough estimate. We believe if the area would be "liquefied" in the future due to a very strong earthquake, the potential damage to the proposed new structure which will be properly structurally designed in accordance with the new up-to-date codes would be much less severe than the existing on-site structures and surrounding existing houses which have been previously structurally designed based on old codes (which are much less stringent than the current new codes). However, the owner(s) of this property should be aware of the potential damage to the new structure due to liquefaction. In summary, it should be recognized that structural mitigation may not reduce the potential of the soils to liquefy during an earthquake; and there will remain some risk that the new structure could still suffer damage if liquefaction occurs, during a very strong earthquake. Note: In accordance with the California Geological Survey (CGS), Special Publication (SP) 117A, a detailed site-specific liquefaction study is not required for this project, since the proposed new dwelling structure is not exceeding two-story and is not part of a development of four or more dwelling units. Slope Stability The site is a flat area; therefore, slope instability is not a concern for the proposed development. CONCLUSIONS AND RECOMMENDATIONS General Conclusions Construction of the proposed structure at the subject site is considered geotechnically feasible, provided the recommendations outlined in this report are implemented. Note: The conclusions and recommendations of this report are based on information as interpreted from our limited subsurface investigation. It is not anticipated but they should be 906 S Virlee St & #2 - <br />10111904212/9/2024