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Gri#in Realry SA, Inc.-Geotechnical Investigation <br />Uiw/Crandall Project 70131-7-0261.0001 <br />July 8, 1997 <br />1.0 SCOPE <br />This report provides foundation design information for the proposed Planning and Building <br />Agency building in Santa Ana, California. The locations of the existing building and our <br />exploration borings are shown in Figure 1, Site Plan. <br />We submitted the results of our foundation investigation at the site for the existing police building <br />in a report dated November 7, 1958 (our Job No. 58338). The locations of our previous <br />exploration borings are shown in Figure 1. The recommendations presented in this report were <br />developed in part using geotechnical information from our previous investigation. <br />This investigation was authorized to determine the static physical characteristics of the soils at the <br />site of the proposed building, and to provide recommendations for foundation design, floor slab <br />support, and for grading for the proposed development. We were to evaluate the existing soil and <br />groundwater conditions at the site, including the corrosion potential of the soils, and develop <br />recommendations for the following: <br />• Design of new foundations to be used for support of the proposed building, <br />including allowable increases for wind or seismic loads, estimated <br />settlements for the anticipated loadings, and frictional and passive values for <br />the resistance of lateral forces. <br />• Subgrade preparation and floor slab support. <br />• Design of walls below grade and retaining walls. <br />• Design of shoring. <br />• Subgrade preparation and design of asphalt and Portland cement concrete <br />paving. <br />• Grading, including site preparation, excavation and slopes, the placing of <br />compacted fill, and quality control measures relating to earthwork. <br />In addition. corrosion studies were performed by M.J. Schiff and Associates, Inc., Consulting <br />Corrosion Engineers. The results of the studies are presented in Appendix B. <br />1