5300 GLENWOOD AVE 2018-01-02 MF Import

, I Glenwood Tcrtace Filc Number 12G994 M�v 12, 1994 Fage I 1 Our experience ��tidi fills such as Uiose found on-sile is diat the exposed subgrade at the 4 foot depth may not bc suitable to directly support struchual fill. lf t1�is a:curs, a suitable gcote�ctile or blanket of rcek spalis may be used to provide a separator between We existing fill and Uie new structural fill. Typically, a minimum first IiR lhiclmess of 2 feet is placcd over the geotextile or rock. We recommend►hnt Uic need for this tyPe of wnstruction and die depdi oCoverexcavstion:+nd the diickness of tcek be evaluated at the timc of construction. Prior to paving, the subgrade should bc proofrallcd witl�a hc�vy tubber-tired piece of cquipment to idcntify soR or }�ielding arcas that require repair. We should be retained to obscrve the proofrolling prior to placement of Uie asphalt or hard surfaa:s. If surfice or subgrnde conditions become tmsuiG�ble due to weaUier wnditions or othcr factors, repairs or a layer of asphalt treatecl baso (A'CB) may be required ovcr the subgrade prior to aspl�alt pla�ement. "Ilic ground water Wble should not ctTbct roadway subgrade widiin the sile, provideJ adequate drainngc and dcwatcring,where necess�+ry, is perfortned. Excavation Considerntions Stability of open excavation cuts wilhin die sloping portions of the site during construction, will depcnd on the naturc and consistcucy of thc nntumlly occurring soils, as well u die prescncc of ground water scepage and nmoR: 'Ilic following temporary cut slopes �re cxpectcd to be appropriate for U�eir respective soil t�•pcs: 2.OH to 1 V for loose cxisting fill:u�d sur}ace soils I.SH to 1 V for mcdium dense or bctter fill and Qva .75H to 1 V for dcnsc or 6ctter Qtb and Qvl�vith cut heights up to 12 fect Ample slope protection and mainten;uicc sliould be uscd during construction. Because oF the many variables inaolved,tl�e above values should bc considercd generol guidclines. Struclurnl Fill Ccneral: All fill placed bencath buildings, pavements, or other settlement sensitive features should be placcd as structural fill. Structural fill, by dcfinition, is placcd in accordancc with prescribcd mcthods and su+ndards, and is monitored by an experienced grnteclmical professional or soils tcchnician. Field monitoring procedures would include the performance of a represenlntivn numbrr of in-place density tests to document thc attaiiunent of U�e desircd dcgrce oCrelativc compaction. 71ie arca to receive ilie rll should bc prcparcd as outlined in Uie Site Preparalion and General Eerthwork subseclion. NELSON-COUVRETTE&ASSOCIATES, INC. r-r�-a:- i��r, �z:n�� 2rr ��+i zsir� 46z �.is