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Report of Soils lnvestigation <br />2215 South Standard Ave., Proposed Addition <br />Santa Ana Califoruia <br />Page 24 of 27 <br />Job No. 40-0613 <br />April 5. 1999 <br />In addition, it is recommended that all pavement areas conform to the foliowing <br />cfltena <br />L All trench backfills, including utility and sprinkler Iines, should be <br />properly placed and adequately compacted to provide a stable <br />pavement subgrade <br />An adequate drainage system should be provided to prevent <br />surlace water or subsurface seepage from saturating the subgrade <br />soil. <br />Placement and construction of the recommended pavement section <br />should be performed in accordance with the Standard <br />Specifications for Public Works Construction. Class II Base <br />should be used as outlined and should have a minimum R-Value of <br />78 and a minimum sand equivalent of25. Final in-place density of <br />the Class II Aggregate Base should be 95 percent of the minimum <br />dry density per ASTM D-1557. <br />Surface run-off and irrigation water should be directed away from <br />the parking areas to avoid contributing to wet or saturated <br />materials beneath the pavement. <br />5. Pavement sections are prepared assuming that periodic <br />maintenance of pavements rvill be done, including sealing of <br />cracks and other measures <br />I <br />) <br />J, <br />4. <br />J