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July 21, 2014 <br />Two Single-]Family residences <br />L&A Job No. 14-065 <br />Page 12 <br />tl�.an 5 percent by weight finer than the No. 200 sieve based on the fraction of ihe material <br />passing No. 4 sieve, and should have individual particles not larger than ihree inches. <br />The ground over which st�uciurai fill is to be placed should be prepared in accordance <br />with recommendations in the SITE P3�PARATION AND GENERAL GR�UTNG and <br />�XCAVATTON �1ND FILL SLOPES sections of this report. Structural fill should be <br />placed in lifts no more ihan 10 inches thick in its loose state, with each lift compacted to a <br />minimum percenta.ge of the maximum dry density determined by ASTM D1557 <br />(Modified Proctor Methodj as follows: <br />Am�licatic�n <br />Within building pads and under foundations <br />Roadway/driveway subgrade <br />Retaining/foundation wall backfill <br />Utility trench backfill <br />RETAINING WALL <br />% �f l���m�� L�� �7�;nsit� <br />95% <br />95% for top 3 feet and 90% below <br />92% <br />95% for top 4 feet and 90% below <br />The hillside in the southeast quadrant of the project site may be stabilized ivith a retaining <br />wall constructed along the toe of the hillside. Seepage out of the hillside may cause <br />exosion and slide. Therefore, toe cut and constructian of retaining wall should proceed <br />a�d be completed in the driest time between May 1 and �ctober 31. Retaining wall may <br />consist of a cast-in-place, reinforced concrete wall or a soldier pile wall. <br />LIU & ASSOCIATES, INC. <br />