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( <br /> C <br /> ( of comp:uiion cyuipmcnt. fach IiH should hc conditioncd to thc proper moisturc conten� and compactcd <br /> ( to Ihc spcciticd dcnsity bcforc placin� suhscyu�nt lifls. Stroctur.il fill should bc compactcd to ihc <br /> fiillowiuc crilcria: <br /> { i. s�„��w�i ru niaccd bclow iloor slabs ;md li�undations should bc compactcd to 95 percent of thc <br /> , MDD cslima�cd in accordancc�eith ASTM D I S>7. <br /> ` 2. Slruc�unl fill in nc�v pa�cmcnl and hurdscapc arcas. including utility trcnch backtill. should bc <br /> cumpac�cd to a� Icast 90 perccnt of ihc MDD cs�imalcd in accordancc with ASTT1 D I S$7.cxccpt <br /> ( Ih;u Ilic upper? Iccl of lill bclo�� fin:il subgradc should bc compacicd to at Icast 95 perccnt of Ihc <br /> MDD,scc Pieurc�1. <br /> , 3. Svucttv:d fill piattd as crushcd surtacing basc coursc bclow pavcmcnts should bc compactcd �o <br /> 9i perccnt of�hc MDD cs�imatcd in accm'dancc��i�h AST�i D 1557. <br /> ` a. Non-stn�c�ural fill. such as lill plattd in landscapc arcas. should bc compacicd to at Icast <br /> ' 911 perccnt uf thc �1DD atimatcd in attordancc with ASTM D I 557. In arcas inicndcd for finurc <br /> dc�clopmcnL a highcr Jccrcc of compac�ion shuuld bc ronsidcrcd Io rcducc thc sctllcmcnt <br /> � pulcnti�d ol'tlu lill soils. <br /> � �1'cathcr Conxidcrations. Disiurbancc of ncar surfacc suilti shuuld br espcctcd. cspccially if carlhwork <br /> is cumplcicd durin� periuds ul'�sct �cc:uhcr. During dry �acathcr Ilu soils will (I)bc Icss susccpliblc to <br /> � disturbancc. ('-)providc bcucr suppo�t lur constnretion cyuipmcnl, and (�1'�c :n��rc likcly lo mccl thc <br /> , requircd compaction crilcria. <br /> Thc ��ct �ccalhcr scason �cncrally bcgins in Oclohcr and conlinucs ihrough May in wcstcm \Yashington: <br /> � huuc�cr. perioJs ol' ���c� ��calhcr may occur durine any monih o( Ilic ycar. For carth��ork nctivitics <br /> , dining�cci �ccalhcr. ��c rccoinmm�d Ilia� thc li�llu�cing s�cps bc takcn: <br /> • 'I'lic gruund sur�acc in and ;uound thc�vork arca shoidd bc slopcd sa �ha� surfacc��:ucr is dircc�cd <br /> � .���ay liom Ihr uvrk arr.i. Thc ground surfacc shuidd hc gradcd so Ihat arcas of pondcd «:ucr du <br /> not dcrclup. 11casures shuuld hc lakcn by Ihc coniractor�o prc�cnt surlacc�vatcr tiotn collccting <br /> � in csra�aiions and trcnchcs. �9casures should hc impicmcntcd to rcmovc surl'acc watcr t}om thc <br /> ��ork arca. <br /> i . fmlh�cork aciivitics should noi takc placc during periuds of modcr:uc w hcacy prcripi�ation. <br /> � • Slupcs�ci�h cspuscd soils should hc cuccrcd �rith plaslir shcclinp. <br /> � • Thc rontractor should takr ncccss�iry mc;isur.s tu prc��cnt un-silc suils and soils tu bc uscd as �ill <br /> lium hccoming �ccl ar uns�ablc. Tlicsc ma�sures mati' includc Ihc usc of plasiic shectinE, sumps <br /> '� o ith pumps, and grading. Thc sitc soils should not bc Icli uncompactcd and csposcd �o moi�lurc. <br /> Sc�ding thc stu'licial soils b� rulling ��ith a snwolh-dnun rollcr prior to periods u(prccipi�alion <br /> � �cill hclp rcJucc thc c�lcni ih;u Ihcsc soils bccumc�rct or unslablc. <br /> �r • Thr conu;utor shuuld cuvcr all soil s�orkpilcs ihat �cill bc uscd as struc�ur,�l �ill ���ilh plastic <br /> slicciing. <br /> { • ConsUlicliun iral7ic shuuld hc reslric�rd lo spccitic arcas of Ihc si�c. prcicrahly arcas ihat arc <br /> stnlaccd �eiih �hc csisiin� asphah ur ��orkine pad malcrials no� susccptiblc w �vc� ��cathcr <br /> disuubancc. <br /> • Consu�iciiun ;uli�ilics should bc schcdukd so diat Ihc Icngtli ul iimc�ha� soils arc Ic�i cxpuscd to <br /> moisuirc is rrdurcd ����hr esicnt p�:uiicd. <br /> ( <br /> ` PJ� \�,,. ;sin-mr.ni� . � Pa,(e ; GEoEMe�ME��� <br /> � a,n �-.:�,�,� 131 <br />