Laserfiche WebLink
Page 2 <br /> <br /> <br />The site is relatively flat; and we understand that major raw cut/raw fill is not proposed <br />for the site. <br /> <br />Geotechnical Conditions <br /> <br />Based on the published geologic map prepared by the California Division of Mines and <br />Geology (CDMG), the site is located within a broad flat alluvium and colluvium area. <br /> <br />A 5 ft. deep test hole was drilled and sampling and laboratory testing were performed. <br />The geotechnical log of the boring is included in Appendix B and the laboratory test <br />results are included in Appendix C. <br /> <br />Based on the data of our test hole and laboratory testing, the on-site near-ground surface <br />subgrade soils generally consisting of silty fine sand, damp and medium dense, and have <br />an expansion index of zero (very low). <br /> <br />It is noted that the subject site is a previously graded lot which was previously approved <br />by the city for construction of the existing house. Distress to the existing house due to <br />deep-seated settlement of the underlying earth materials was not observed and or <br />reported. Therefore, deep-seated settlement is not anticipated to be a problem for the <br />proposed new structure; and therefore, drilling deeper test hole(s), substantial sampling, <br />and consolidation testing for verification of potential deep-seated settlement are not <br />considered necessary for this project. In addition, for conservative purposes, the lowest <br />Code values (2019 CBC, Table 1806.2 Material Class 5) including the lowest bearing <br />capacity of 1,500 psf. are recommended to be used for the proposed new structure. <br />Therefore, direct shear testing is not considered necessary for this project. <br /> <br />Ground Water <br /> <br />Free standing groundwater was not encountered in our 5 ft. deep test hole. <br /> <br />Free standing ground water was not reported to be an issue at the site and in the vicinity. <br /> <br />Deep footings/excavations are not proposed for the site; therefore adverse effects due to <br />groundwater are not anticipated for the proposed development. <br /> <br />Note: it is not anticipated; however, if wet soils are encountered, removal of the wet soils <br />and replacement with drier soils/cement slurry/gravel/base materials can be performed. In <br />addition, if needed, crushed rock and or geogrids for bridging, etc. can also be used. This <br />will be determined by the geotechnical consultant based on the exposed conditions during <br />the excavations at the site. <br /> <br />Seismicity <br /> <br />5604 W Highland St & #2 - <br />101119017-1811/19/2024