11802 EVERGREEN WAY BASE FILE Geotech Report 2018-01-02 MF Import

68/18/2005 15:27 4257478561 ,�� . � , PAGE il LuGa Deve/opment, itC August 18, 2005 JN p5233 Page 10 Geotech Consultants, Inc., after the site is atrfpped and cut to yr�de, Recommendations for the wmpacNon of stn,ictural fill beneaUt pavemerrte are given in the section entitled Genera/ :arthwork and SWctural Fill. The pertormanCe of sfle pavemer�ts is direetly related to the strength and stability of the underlying subgreda, • The pavemerd fa• Iightly (oaded traftic and patking areas shp�b �p�lst of 2 111CF1es of esphalt concrete (AC) over 4 fnches of crushed �odc,base �CRg� or 3 inches of asphaft-t►eated base (ATB), We recommend providfng heavily baded areas with 3 inc��es oT AC over 6 inches of CRB or 4 in�hes of ATB. Heaviiy lo2ded areas ere typica��y main driveways, dumpster sites, or areas wiq� trudc traffic, Increased m��irttenance and more frequent repairs should be exped:d H thinner pavement sections are used. Water from plarrter areas and other sources ahould not qe allowed to Ir�filtrate.into the pavement . subgrade. The pa�emerrt section recommendatkns nnd gWdefines presented fn thia repert are based on our experience in the area end on what has been succ�ssful in similar situations. As wkh , e�Y P�emeMs, some matrrtenance and repair of limited ereas can be e�ed es the pavemem a9es. Cracics in the pavement should be sealed es soon as possible after they beoorne evident� m order to �educe the poteMiai for degradatlon of the subgrade irom infiltratlon of surface vrater. For • the same reaaon, ft (s aiso pru�erd to aeal the surface of the pavemertt aRer it has been in use for several years. To pmvide for a desfgn wltl;out{he need {or any maintenance ar repafr xbuld be unaconomicaL GENF�tq1.EqR�rypRKAND STRUCTURAL F7LL . All building and oavement areas shouid be sVipped of surface vegetalion, topsoil, organic eal, and other deleterious materiai. It is impr�� ng foundeUons be removed 6efnre site development. The stripped or removc� mate�ials should not be mbced with any materials to be used as structural flil, but they could be used in non-sVucxural areas, such es landsppe beds. Structur.�l fill is defined as any fip, 111cluding utility backtill, placed under, or dose to, a hulldirig, behind permanent retain(ng or foundation walls, or in other areas where the underlying soir needs to support loads. All structural fill shouid be placed in harizorrtal lifts with a mo(stu� conterit at, or near, the optimum moisture content. The optimum moisture corrtent Is that moisture contc:nt that t�esults in the greatest compacted dry density. The mobture content of fill is very importa�nt end � must be�osely controlled during the filUng and compactlon process. The allowable thickness of the fill Uft wtll depend on the material type se�ecxed� the com��aetion equipmerrt used, and the num6ar of passes made to compact the �ift, 'fhe �pps� �� ,;,��y should not exceed 12 inches. We recommend testing tha ftll as it is p�aCed. If the flll (s not suffider�tly compacted, it can be recompacted before another lift is Alaced. This eliminales the need to remove the fll1 to aehieve the required compaction. The follow(ng table presenGs recommended relativve wmWactlons for structural fill: • GEOTECH CONSULTANTS,INC.