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p <br /> 5.2 Soils and Geology <br /> 5.2.1 Environmental Setting <br /> A soils and geology report has not been prepared for the <br /> proposed project. A soils and geology report* was prepared, however, <br /> K for the Fashion Square Parking Structure located west of Fashion Square <br /> Shopping Center within the proposed Fashion Square Corrmnercial Center <br /> U project boundaries. This section will surrinarize the information <br /> contained within that report and will serve as general information of <br /> the soil type on the project site. <br /> L <br /> Natural soils underlying the parking structure and presumably <br /> the project site are alluvial deposits associated with deposition by the <br /> Santa Ana River. The upper deposits are comprised of variable fine1 <br /> ( sand, silt and clay mixtures. In-place consistency was found to be' <br /> somewhat non-uniform, generally ranging from moderately loose or soft to <br /> -i compact. These upper non-uniform deposits extend to depths of 12 to 25 <br /> feet in thickness. The soils between 25 feet and 50 feet, the maximum <br /> depth explored, consisted of compact to dense, fine to course sands and <br /> gravels. <br /> -S <br /> Artificial fill,.*apparently associated with the original <br /> overall grading of the Fashion Square site was encountered in all the <br /> -t test borings made within the paved areas that were once located where <br /> the parking structure is now located. In general, the depth of fill was <br /> L greatest along the east edge of the parking structure site and then <br /> gradually decreased in depth toward the southwest. The fill material <br /> was predominantly comprised of variable silty sand and clayey sand <br /> mixtures with occasional sandy clay and clean sand layers. No <br /> t <br /> I * Soils and Foundation Investigation Fashion Square Parking Structures, <br /> Soils International, February 23, 1977. <br /> a <br /> 58