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Project No.: 2157-S <br />1433 Cypress Ave, Santa Ana <br />Potential seismic -induced settlement was computed for the soil layers having t <br />than 1.0 in accordance with a simplified method proposed by Kohji Tokima <br />1987, "Evaluation of Settlement in Sands due to Earthquake Shaking", Journal <br />Engineering Division, ASCE, Vol. 113, No. 8, August, 1987. Based on the re <br />seismic -induced settlement will be on the order of 1.14 inch. Volumetric strain c <br />Plate 4. <br />CITY OF SANTA ANA <br />PlanrrpgWndBuilding Agency <br />Approved <br />spfMOrWIlsISSUANCE <br />and Seed, H.B. <br />tVe Gegtechnical <br />aster <br />lbgfethe analysis, <br />Based on our evaluation of the site conditions and findings of this investigation, it is concluded that <br />the proposed development of the subject property is feasible from the geotechnical engineering <br />viewpoint provided the following conclusions and recommendations are incorporated into design <br />criteria and project specifications and are implemented. <br />The proposed building may be supported on conventional spread footings embedded into the <br />existing undisturbed natural soils. <br />8.1 Soil Expansion <br />An expansion test was performed on a representative sample of the onsite slightly silty clay <br />materials in accordance with ASTM D-4829 to evaluate its volume change with moisture. The test <br />result is as follows: <br />Expansion <br />Expansion <br />Sample <br />Classification <br />Index <br />Potential <br />B-2 @ 3' <br />CLAY; silty <br />63 <br />Medium <br />The test result indicates that the materials have medium expansion potential with an El of 63. <br />Foundations shall be placed at least 24 inches below the lowest adjacent final grade to mitigate <br />expansion potential. <br />PACIFIC GEOTECH, INC. <br />