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<br /> <br />ASSOCIATED SOILS ENGINEERING, INC. Project No.: 7160.23 <br />2860 Walnut Avenue, Signal Hill CA 90755 January 23, 2024 <br />Tel: (562) 426 -7990 * Fax: (562) 426 -1842 Page 3 <br />• Computation of design infiltration rates of site soils required for on-site stormwater low impact <br />development (LID) system planning and design. <br />G. Preparation of this Soils Report presenting the works performed, the data acquired, and our <br />conclusions and geotechnical recommendations for the design and construction of the Building. Also <br />presented are the recommended design infiltration rates for on-site stormwater LID system planning <br />and design. <br /> <br />Please note that ASE's geotechnical investigation did not include any evaluation or assessment of hazardous <br />or toxic materials which may or may not exist on or beneath the site. ASE does not consult in the field of <br />potential site contamination/mitigation. <br /> <br />2.0 SITE AND SUBSURFACE CONDITIONS <br />2.1 Location and Surface Conditions <br />The Building are to be located within the Santa Ana Zoo at 1801 East Chestnut Avenue in the City of Santa <br />Ana. <br /> <br />The Site is bound north and northeast by East 1st Street and the Santa Ana Freeway, respectively. Zoo Lane <br />and East Main Street bound the Site to the west and south, respectively. <br /> <br />The Building will be located easterly within the existing Santa Ana Zoo facility. The area of the Building is <br />presently occupied by open unpaved entry walkway and turf lawn, and is generally uniform and level. <br />Existing zoo buildings throughout the Site are generally one to two-story in height. Animal enclosures, small <br />bushes and trees are present throughout the Site. Asphaltic concrete (AC) paved parking lots and access <br />roads are present to the south and east of the Site. <br /> <br />2.2 Subsurface Conditions <br />2.2.1 Artificial Fill (af): <br />Artificial fill was not observed in any of ASE’s exploratory borings and percolation test borings but <br />may be present at other areas of the site, or could be encountered during site grading, subject to <br />the observation and confirmation of the Geotechnical Consultant. <br /> <br />2.2.2 Younger Fan Deposits (Qyfa): <br />Native site soils consisting of Holocene-age younger fan deposits were encountered from surface to <br />the maximum explored depth of 26 feet in ASE’s exploratory boring B-1. Per Reference 4, the <br />younger fan deposits are characterized as unconsolidated sand, sandy silt, and silt of the Santa Ana <br />River, Santiago Creek and Peters Creek. In specific, the on-site fan deposits materials consist of