7431 EVERGREEN WAY TACO BELL 2018-01-01 MF Import

( GEOTECHNICAL ENGINEERING STUDY Taco Bell Corporation April 29, 1993 i E-6140 Page 7 For frictional capacity between the base of footings and/or fioor siabs and the underlying soil a coefficient of .40 can be used. Friction and lateral pressure may be combined; however, the Iateral bearing resisiance used must not exceed two-thirds of the combined amount. These values include a factor of safety of 1.5. .� . :�: .. Slab-on-grade floors may be supported on competent native soil subgrade or on structural fill, depending on final grades and the location of the proposed structures. Any disturbed native soiis must either be recompacted or replaced with structural fill. The siab should be provided with a minimum of four inches of freA-draining sand or gravel. In areas where s�ab moisture is undesirable, a vapor barrier such as a 6-mil plastic membrane should be placed beneath the slab. Two inches of damp sand shouid be placed over the membrane for protection during construction and to aid in curing of the concrete. : : .� , In no case should the excavation slopes be greater than the limits specified in local, sta2e and federal safety regulations. According to the naw OSHA regulations, the existing medium dense to dense silty sand fill (SM) and dense native sand (SP) and silt with sand (ML) wouid be classified as type "B" soils. Therefore, temporary cuts greater than four feet in height, should be sloped at an inclination no steeper than 1 H:1 V for type "B" soils. If slopes of this inclination, or flatter, cannot be constructed, or if excavations greater than ten feet in deptli are required, temporary shoring may be necessary. This shoring would help protect against slope cr excavation collapse, and would provide protection to workmen in the excavation. If temporary shoring is required, we will be available to provide shoring design criteria, if requ�sted. � � The above information has �been, provided solely as a service to our client. Under no circumstances shouid the above information be interpreted to mean that this office is assuming responsibility for construcYion site safety ar the contractor's act(vities; such responsibility is not being implied and should not be inferred. Site Drainaqg It is not likely that groundwater levels will present any construction related problems while excavating the foundation footings. However, if seepage is encountered in the utility or foundation excavations during constructian, the bottom of the excavation should be sloped to one or more shallow sump pits. The collected water can then be pumped from these pits to a positive and permanent discharge, such as a nearby storrn drain. Depending on the Earth Consultants, Inc.