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�w -t <br /> � <br /> �..,, _-�� i <br /> . <br /> � <br /> , <br /> �" � � <br /> �� � 1 � <br /> � � � � I <br /> ��� I <br /> O O �-�► r�� <br /> '� '�tl <br /> tA <br /> � �� � <br /> Q M <br /> �itnq� Kelvin and Patti Barton JN 91322 <br /> �` � october 22 , 1991 Rage 8 � <br /> �y I <br /> H� � <br /> ��� No groundwater was observed during our field work . However , � <br /> � � seepage into the plarned excavation is possible, and if � <br /> encountered should be drained away from the site by use of � <br /> drainage ditches, perforated pipe or French drains, or by , <br /> y �y pumping from sumps interconnected by shallow connec:or j <br /> trenches at the bottom of the excavation . � <br /> The excavation and site should be graded so that surface water , <br /> is directed off the site and away from the tops of slopes . i <br /> Water should not be allowed to stand in any area where <br /> foundations, slabs , or pavements are to be constructed. Final <br /> least9two� (2)� percent awaycfromttheUbu�ld�ngh�except wheredthe <br /> area is paved. <br /> [:cNFRAL EARTHMORK AND STRUGTURAL FILL <br /> �-- We recommend that the building and pavement areas be stripped <br /> � ���+ and cleared of all surface vegetation, all organic matter, and <br /> other deleterious material . 1'he stripped or removed materials <br /> � � ' should not be mixed with any materials to be used as <br /> 1 structural fill . <br /> c- ' <br /> � �� Struct�ral fill is defined as any fill placed under the <br /> building , behind permanent retaining or found. tion walls , or <br /> in other areas �rhere the underlying s�ils n�ed to support <br /> �� w loeds . Geotech Consultants, Inc. should observe site <br /> � � ' � conditions during and after excavation prior to placement of <br /> i � any structural fill . <br /> All structurel fill should be placed in horizontal lifts with <br /> a moisture content at or near the optimum moisture content. <br /> , �..� The optimum moisture content is that moisture content which <br /> results in the greatest compacted dry density. The moisture <br /> content of fill soils is very important and must. be closely <br /> controlled during the filling and compaction process . <br /> �� <br /> The allowable thickness of the fill lift will depend on the <br /> material type, compac�.� on equipment used , and the nurnber of <br /> passes made to compact :he lift. In no case should the lifts <br /> j �t`� exceed twelve (12) inches in loose thickness . The Fo' iowing <br /> ` table presents recommended relative compaction for structural <br /> fill : <br /> GEOTECH CONS'JLTANTS , INC. <br /> -- - - j <br />