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~l <br />FOUNDATION PREPARATION AND £AR'f IiWUFt h: <br />• 4 <br />The foundation area of Lhe fill should be c1L:ared of a.il <br />vegetable, organic or deleterious material prior to placement <br />of the embankment fill. The clearing op!•rations should extend <br />beyond the edge of the proposed embankment a distanr_c <br />sufficient to insure that the emt~ankment fill is not },laced <br />on any deleterious material- WL: suggest at least five: (5) <br />feet. 'S'he concept is shown on P~yuru 7. 'S'he :.urfar L• of chL: <br />area to rccuive fill should be c~r:ntourad su that ii li.~•. ,i <br />slope to the center of the fill area and also from thL~ bac}: to <br />the toe of the fill to promote rapid drainge of co1lc~~l~•ci <br />water. This is to encourage water that may u~~rwuulat~ .it the <br />fill/natural contact to drain tows rd the bl.u~ket wui~~~•ir sin <br />• to be collected and drained out of the fill area. ThL.~ soil <br />exposed in the clearing operations ::hou ld l~u i~roof-rnil<<] <br />prior to placement. of the fill. Any ]ooso, low ~L•n:;ity ~~_ <br />pumying areas exposed during the proof-rolling ooc r.i~cun:• <br />s}rould be removed and replaced with compacted fill. 1!~ +,hould <br />be called to observe the soils r. ::posed durinc the L,7L~,.i ing <br />operations to verify the foundatron conditrons. <br />The fill for the spoil pile should be placed Lu tiu~~ <br />lifts, smoothed to even thickness, moisture cunditio~,.n and <br />compacted to at least 90 percent of modified Proctor density <br />as defined by ASTM D1557. The fill should be compacteLl <br />throughout the entire area of fill including the faco of the <br />-7- <br />M85021GE <br />u <br />~laitibert atiD ~,s,ooriate~ <br />I:ONl.UL11NG GCOTECHNIGAL IHGINEERS AND <br />MAIERI/•! LESTING <br />