5300 GLENWOOD AVE 2018-01-02 MF Import

Glcmvood Tcrracc Pilc Numbcr 12G994 1�1 ay 12, 1994 Page 12 Melerinls: 1mpoAcd structunl 611 shauld consist of a goal quality frec-draining gr:uwlar sail, frce oC organic and other de�:terious matcrial, and be well graded to a maximum siu oC Tbout 3 inches. ImpoAed, all wcather fill should contain no more than about Gve percent fines (soil finer lhan a U.S. No. 200 �ieve, bascd on d�at fraction pazsing ttie U.S.No. 4 sieve). 71ie Qvu is only sligldly moisture scnsitivc, 6ut is oflen di46cult to compact duc to thc uniform grain size. 71iis material should be considered a good source of structural fill for this project. 'Ihe largest source of this matcrial in Uw cast trending ridgc U�at is to bc rcmovcd from Oie site. The top of Uiis ridge is capped µith till. 7he till is more moisture sensitive and care should bc taken to not mix the swo materials during constniction. 71u morc till matcrial tl�at is mixcd into the ouhvasL, d�c more moisture scnsitivc tl�e resulting fill matcrial will bc. 7he fill and surface soils contain some finc-grained paAicles and various amounts of organics and are considcrcd moisture scnsitive. The existing fill and upper topsoil should not bc uscd as structural fill for llic sitc. 'Ihe Qvt and QIb aro moisture scnsitive mid Uu use oF diese soils as slructural !'ill will be depen�ent on moisturc conlcnt control. Wilh lhe excep�ion of the dry summer montlu, it wi�l be di(ticult to use such soils. Even at Uiis time of ycar,somc discing for drying or watering may be rcquircd to achieve the desired moisturo conlent. 1V� recommend that Aic usc of tliese soils as structural fill be considcrcd marginal und for plarming purposes that t6ey be considered imsuitnble. During constn�etion, if the proper conditions can bc obtaincd,die wst of the import would be considcred a savings. Fill PlnccmenL• Follo��'ing subgrade preparnlion, pinccment of the structural fill may proceed. All 6ackfilling should bc accomplishcd in 8 ro IO inch diick uniform lifts. Each IiR sliould be spread cvcnly and bc lliorougldy compactcd prior to placcment of subsequent lilts. All structural fill undcdying building areas, artd t��iWin 2 fcet of pavement subgradc, slwuld be compacted to a minimum of 95 percent of ils ma.�cimum dry density. Marimum dry dcnsity in tliis nport refcrs to that density :ss determincd by the ASl'A1 U 1557 Compaction Tcst procedure. Fills more thm� 2 fect bcnealh sidc��alks, and pavcment subgrades should be compactcd to 90 percent of Uieir marimum dry dcnsity. "fhc moishire contcnt of thc soils ro be compacted should be within about 2 pereent of optimum so Uial a rcadily compactable condition cxists. It may bc ncccssary lo overexcavatc and removc�+�et soils in cascs wherc drying ro a compactablc condition is not Ceasible. All compaction should be accomplished by equipmenl of a type and size suETeicnt to attain dic desircd dcgr��:of con�paction. NELSON-COUVRETTE& ASSOCIATES, INC. rr-e-as-iQ�� z:os zc�� nai zsio 96i r-.�a