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� Mr. Bill Rucksr <br /> 25 SePtember 1992 �N-8396 <br /> Pape 6 <br /> ^ Struetural elemenu should not be placed closer to site slopes than indieated on our sketches. <br /> Additionally, site devslopment shouid not include cipnificant cuts or fillc or sipnificant ctrippinp on <br /> .� staep sits slopas or wichin slope setbacks. <br /> Ske Prep�ntlon <br /> Site preparation should inelude the removal of all vepetation, root masa, orpanic soils, existinp Till <br /> material, and any deletenuua debris from buildinp and pavinp areas, or those locations where <br /> 'ttructurai fili" is to ba placed. Such materials shouid bs wasted from the site or utilized only aa <br /> landscapinp fill. However, s��ah landscrpinp fill should not bs pleced near the tops of stesp siopes. <br /> -•• We estimate that topaoil strippin0 depthc wouid penerally ranpe from approximately 12 to 18 inches. <br /> Ths m�ximum depth of fill and underlyinp topsoil ancountered durinp ths field explontion was <br /> , , approxim�tsly 2 fset at ths location of test piu TP-13 �nd TP-1 B, Ths nature and dittrlbution of <br /> , uncondollsd fill material it such that iu lateral and vartical extent is likaly to vary over the site. <br /> Therefore, aro�s of dsepsr fill may exiat between our ezploration locationa. <br /> Bated upon our explora8ons, atrippinp of vepetation and unauitable aoils ahould reveal eithar medium <br /> � ' ' denas cande or medium etiff to hard eilts. Upon completion of strippinp, the exposed subprade, Ifkely <br /> � `" to consiot of inedium dense sand or medium stiff silt, ahould be compacted to at least 90 percent of <br /> . , the modified Proctor maximum dry density�ASTM:D-1557)to a depth of at Ieast 7 2 inchea below the <br /> . surface in paved or structurai areas. The subprade may be proof-rolled with a heavy compactor, <br /> loaded double-axlo dump truck, or other suitabie heavy equipment. A representative of our firm should <br /> be prasent to assess the subprade conditions prior to £Ilinp. <br /> Preparation for site prodinp and construction ahould bepin with procedures intended to drain existinp <br /> ponded water and connol the surface water runoff. It will not be possible to successfully utilizs on-aite <br /> soila as 'structural fiil• �i �ccumulated water is not drained prior to pradinp, or ff droinape ia not �[� <br /> controlled durinp consttuction. Attemptinp to prads the site withoui adequate drainape conhol\ . 1'� <br /> measures will reduce the amount of on-aite soil effectively available for use, reduce equipment \ <br /> maneuverability, increase the amount of soil disturbanee and select impott fill material rtquired, � <br /> potentially contribute to reduetions in site sfope stability, and ultimately increase the cost of the <br /> earthwork and foundation construction phases of the project. <br /> ... C� AGRA <br /> Farth&Envrronm?ntal Group <br />