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GEOTECHNICAL ENGINEERING STUDY <br />Inform, Inc <br />May 9, 2002 <br />E-8493-5 <br />Page 11 <br />The appropriate locations of subsurface drains, if needed, should be established during <br />grading operations by ECI's representative at which time the seepage areas, if present, <br />may be more clearly defined. <br />During construction, the site must be graded such that suriace water is directed away <br />irom construction areas. Water must not be allowed to stand in areas where the kiosk <br />buildirg, slabs, or pavements are to be constructed. Loose surfaces should be sealed by <br />compactinfl the surface to reduce the potential (or moisture infiltration ir,to the soils. <br />Final site grades must allow (or drainage away irom the kiosk and canopy foundations. <br />The ground should be sloped at a pradient o( 3 percent for a distance of at least ten feet <br />away from the kiosk, except in paved areas, which can be sloped at a gradient of Z <br />percenL <br />Footing drains should be installed around the perimeter oi the kiosk, at or just below the <br />invert of the footing, with a gradient suf(icient to initiate flow. A typical detail is shown <br />on Plate 3. Under no circumstances should roo( downspout drain lines be connected to <br />footinp drain systems. Root downspouts must be s�parately tightlined to discharge. <br />Clean outs should be inst�uecf at stratepic locations, to allow (or penodic maintenance oi <br />thQ (ootinfl drain and downspout UphUmc systcrns. <br />Uti� Support and Back(ill <br />E3asCd on lhC Sod r.ondilionti nn�;ountcrc�l, ihr� soils exp��r,tr_r1 to b^ nxpoSCd by utdny <br />r,x,r,;�vriuons shr>iilrl provide adequate su��port tor utdit�ns and ihc und�rpround storape <br />t;��il:s. <br />Utihiy Uench bar.�ldl is a prunary conc�rn in rodur.in�� the potenlial tor snt�lement 01onp <br />utdity allpnments, porticularly in pavernent areas. 11 is importent that each section o1 <br />ut�lity line bo adequateiy supported in thc beddinp materiat. Tho matcrial should bo hand <br />tamped to ensurQ support is provided nround the pipe haunches. Fil� should be cerefully <br />placod end hond tempod to ebout twolva (12) incties above ihe crown of tha utility pipes <br />be(ora heavy Compaction equipment is brought into use. iho necessary thickness o1 i�ll <br />ir�at should bo placod ebovo the underground storage tanka prior to using heovy <br />r,ompaction oquipment should bo bAsed on tlin manutacturers specifications. The <br />remaindor ol ihe �rQnch backtill and �nderground storage tank iill eh�uld be pleced in lilts <br />havinp a loose thir,knr.s5 ot Inss than twelve (12) inches. A typical trenc,h backtill eection <br />pnd GOmpaCtiOn re��uu��nu,nt5 fur I��s�r1 siipf»rUn� �nd non load aupport�np ereas ie <br />�mtsr�nt�trl nn Pi�te 4 <br />i.���, c,,,,.,���w.,,a �,,,. <br />