SR 05:007 - Laserfiche WebLink

November 8~ 2004 Job No. 2648.100 Page ? According to the 2001 Califomla Building Code (CBC), the following geotechnical input eau be used in sUuctural design of the new residence: It is oar opinion that the structural integri~ of the propoied residence is a primary, factor in det,ermining potential seisn~c damage and that the degree of seismic damage would only be' nominally influer~ced by the foundation system selected. We recommend that, at a minimum, the building be designed in conformance with the cun'ent edition of the CBC. LIQUEFACTION 'i. - ' n ora satiated, cohesionless soil into a viscous fluid Liquefaction is the temporary transfonnaUO during strong ground shaking from a majar earthquake. There is no evidence of earth materials susceptible ro liquefaction in area~ of proposed improvements ai the site. Therefore, the risk of liquefaction is considered to be very. low. GROUND SUBSIDENCE Ground subsidence can occur as a result of dans~ficanon or shakedown when dry, cohe~idnless soils are subjected to high amplitude earthquake vibrationS. In general; significant deposits of loose sandy soils do not exist on site; therefore, seismically induced ground subsidenoe is not considered a geologic hazard onthe sire. ADDITIONAL SOIL ENGINEERING SERVICES Prior to constraction our firm should be provided the opportuniW to review the final plato and specifications to .determine if the recommendations of this report have been implemented in those documents. The review would .be aclmowledged in writing. To a degree, the performance of the proposed improvements is dependent on the procedures and qualiB~ of ~he construction. Therefore, we should provide on-site soil observations of the contractors procedures and the exposed soil conditions, together with field and laboratory testing during site preparation and grading, placement and compaction of fill, retaining wall cons~'ucfion, foundation construction, subdrain installation and swimming pool construction. These observations will allow us to check the contractor's work for conformance with the intent of our recommendations and to observe any unanticipated soil conditionz that could require modification of our recommendations. In addition, we would appreciate the opportunity to meet with the contractor prior to the start of grading to discuss the procedures and method~ of construction. This can facilitate the performance of the construction operation and minimize possible misunderstandings and construction delays. ~ a~m¢.RE_C.[IV£D T]M£:HNOV. 8. C]0:32AM-TANTS