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The previous subsurface investigations performed by Alta California Geotechnical, Inc. (ACG) were <br />performed on July 7, 2021 and consisted of the excavation of eight geotechnical hollow stem auger <br />borings (B-1 through B-8) and three percolation test borings (P-1 through P-3). The geotechnical <br />borings were excavated to a depth of approximately 26 feet while the percolation test borings were <br />excavated to an approximate depth of 5 feet. Approximate locations of the previous borings are <br />included on the Boring Location Map (Figure 2). The logs of the borings are included in Appendix B of <br />this report. <br />During the previous subsurface investigation, representative bulk and relatively undisturbed samples <br />were collected for laboratory testing by ACG. Laboratory testing was performed on representative soil <br />samples and included in -situ moisture and density tests, maximum density and optimum moisture <br />content, grain size distribution, expansion, consolidation, and corrosion testing. The previous laboratory <br />test results are also presented in Appendix C. The moisture and density test results were presented on <br />the boring logs included in Appendix B. <br />Project i y 66n,61 18 — 817 1 3 , 2021 <br />