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Grifin Really SA, Inc.-Geotechnical Investigation <br />Unv/Crandall Project 70131-7-0261.0001 <br />July 8, 1997 <br />3.0 SITE CONDITIONS <br />The site is located northeast of the Santa Ana City Hall building in the Civic Center area. The site <br />is currently occupied by the former Police Department building and a surface parking lot. The <br />Police Department building is currently vacant and is two stories high and underlain by one <br />subterranean level. The existing building extends over a ramp that connects the existing grade to a <br />subterranean parking level that is located adjacent to the west side of the existing building. If a <br />subterranean parking level is not constructed, the existing basement will be backfilled. The <br />existing building is supported on pile foundations and we understand that the existing piles wili be <br />left in-place and will not to be used for support of the proposed building. An on grade annex <br />building is located at the southwest corner ofthe existing building. <br />4.0 EXPLORATIONS AND LABORATORY TESTS <br />The soil conditions beneath the site were explored by drilling two borings to depths of 68'h and 70 <br />feet below the existiAg grade at the locations shown in Figure 1. Data were also available from our <br />previous investigation at the site (our Job No. 58338). Details of the current and prior explorations <br />and the logs of the borings are presented in the Appendix A. <br />Laboratory tests were performed on selected samples obtained from the borings to aid in the <br />classification of the soils and to determine the pertinent engineering properties of the foundation <br />soils. The following tests were performed: <br />• Moisture content and dry density determinations. <br />• Direct shear. <br />• Consolidation. <br />• Hydroconsolidation. <br />• Compaction. <br />All testing was done in general accordance with applicable ASTM specifications. Details of the <br />laboratory testing program and test results are presented in the Appendix. <br />3