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FILi, MATERIAL <br />Materials placed in the fill shall be <br />approved by the Geotechnical Engineer and shall be free of vege- <br />table matter, frozen material, and other deleterious substances. <br />No material over 6 inches in maximum dimension shall be placed in <br />fill unless special recommendations are provided by the Geotech- <br />nical Engineer. Granular soil shall contain sufficient fine <br />material to fill enough voids to provide a stable fill. The <br />definition of structural subgrade fill soils and road subbase are <br />given in this report. Expansive soils, soils of poor gradation, <br />or soils with low strength characteristics may be thoroughly <br />mixed with other soils only if specific recommendations have been <br />provided by the Geotechnical Engineer. Any import material shall <br />• he approved by the Geotechnical Engineer before being brought to <br />the site. <br />P1,ACiNG AND COMPACTING FILL <br />After clearing or benching, the natural <br />ground in areas to be filled shall be observed by the Geotechni- <br />cal Engineer to determine the presence of any adverse unantici- <br />pated conditions. The area shall then be scarified to a depth of <br />6 inches, cleared of oversized material, brought to the proper <br />moisture content, compacted and tested. <br />The distribution of the material in the <br />fill shell be such as to avoid the formation of lenses, or layers <br />of material differing substantially in characteristics from the <br />• surrounding material.. The materials shall be delivered to the <br />14 <br />