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(:vcreu Comnwnitv Cullcec <br /> Novcmbcrld. '-OU3 <br /> Paec '_ <br /> FOOTING SUBGRADE PREPARATION <br /> \1'c obsc�cd prcpan�ion uf Ihc foutinc subg�:idc soils for thc Undcrgr:iduatc Gducation Ccntcr. <br /> Obscrvaiions of Ibuting subgradc conditiuns wcre madc to vcrify ihc rccommcndcd allo�cable bcaring <br /> pressurc o(6,000 psi lor dcnsc, unJisturbcd, glacial soils and 3,000 psf for stnictur;�l till uvcr undisturbcd <br /> dentic glacial soils. Our obscrva�ions of fooung subgradc soil prcparation occurccd bchvccn Octobcr I I <br /> ;md No�-cmber 2Q 2007. in gencral, the 1'ooting subgrade soils consist of densc silt}' sand with gra�el <br /> (glocial lill), hard glacial silt, or suiictural Iill ovcd�•ing thc nati�c gL•ici;�l suils. SubgraJe soils �vcrc <br /> cvaluatcd �vi�h a !iz-inch diamcter stccl probc rod and/or by per(om�ing iu-placc nudcar moisturc anJ <br /> dcnsiry tcsis. SubgraJc arcas Ihat rcquircJ rcmoval of unsuitablc suils wcrc occrexcavated anJ backfillcd <br /> wilh cuncretc or conlrollcd Jcnsity fill (CD�}. ln our opinion. Ihc fouting subgradcs wcrc adcyuatcly <br /> prcpareJ, and �vhcrc nceded, concrcte or CDF placed i�clow footings was ;iJcyu;ucly placeJ anJ is <br /> salisl:ictory for the Jcsign bcaring capacitics prescntcd in Ihc gcolcchnical rcpon. <br /> PLACEMENT AND COMPACTION OF STRUCTURAL FILL <br /> Nc obscrvcd cxcavatiun anJ pl:iccntcnt of struc�ural fill in tmd around thc building un an intcnnittcnt <br /> basis bctwecn Junc 7, 20U7 and Ociobcr 22, 2008. Fill pL•iccd wilhin thc building arca includcd stnut:�ral <br /> lill for foo�ing, wall, and (loor slab suppurt, and backfill around tlic footings, walls, and cicwUor sha�i. <br /> '1'his aclivity includcd cvalualing importcd lill yuality by complcting laboratory sic��c analyscs ;md <br /> Pructor tes�s(maxinmm Jry dcnsity Jetenninations). The impuned fill gcnerally consists of sand with sih <br /> and gravcl (gravd borrow). On-sitc silty sand with gravel (glacial till) �vas also uscd for slruc�ural fill. <br /> l'hc slniclur;d fill was cvalualcd by complcting in-pl:icc moislurc and dcnsiry tcsts and by probing with a <br /> '/,-inch-Jiamctcr stccl pmbc rod. 13ascd on thc tcst resuhs :md our obscrvaiions, stniciural fill placcd in <br /> lhc building (ootprinl was compactcd to n� Ir,�s� 95 perccnl of thc �1D17 per ASl'�I D 1557. 13ackfill <br /> consisling of importcd gravcl bon'ow or suitablc onsitc glaci:d till pl.icecl outsidc thc building was <br /> compuctcd to at Icast 95 percent of thc MDU per ASTM D 1557 in thc upper 2 fcct, and to at Icast <br /> 90 percent MDD bclow ihe top Z CecL In aur opinion, the strucmral fill placed :md cv:dualed during our <br /> sitc visits wns compactcd according io thc projcct plans and specifications and our rccommcnJations. <br /> PAVEMENT SUBGRADE EVALUATION <br /> N'c evalualcd lhc paventcnl subgrade soils for road, parking lot, dumpstcr pad, hardscape, sidcwalk, and <br /> curb arcas on an intennittcnt basis bcnvccn August 27 anJ Novcmbcr 10, 2008. Thc subgndc soils ��•crc <br /> cv:duatcd with a '/z-incli diamctcr stccl probc rod and/or by prooGrolling with on-si�c cquipment. <br /> SubgraJc arcas that rcquired o��crcxcavation of sofl soils wcrc backtillcd �vith structural fill. Thc <br /> stnictural fill was evaluateJ with in-place moisuire :md density tcsts ancUor by probing. l3ased on Ihe tcst <br /> raults and our obscrvalions, thc swctuml fill �vas compacicd to at Icast 95 perccnt of ihc MDD per <br /> ASTM D 1557. In our opinion, bascd on our obscrvations thc pavcmcnt subgradc for thc siJc�valks and <br /> asphalt pavcmcnt wcrc prcpared in gcncral accord;mcc with thc projcct plans, spccificalions and our <br /> recomtncndations. <br /> ON-GRADE FLOOR SLAB SUOGRADE PREPARATION <br /> �Vc obscrved placcmcnt of structural fill and prcparatiun of omgradc Ooor slab subgradc soils for thc <br /> projcct prior to anJ aRcr placcmcm of thc cnpillary brcak maicrial. Our obscrvations mgarding on-gradc <br /> Iloor slab subgradc soils ��•cre madc bchvccn August 3, 2007 anJ January 3, 2008. Tlic on•graJc �loor <br /> slab subgradc suils consistcd of Jcnsc to vcry Jr.nsc silty sand with gravel (glacial till), hard glacial silt, <br /> �md impu�tcd and on-sitc xtruc�ur�l fill, which wcrc ct�nluatcd 6y cithcr performing in-placc moisture and <br /> dcnsity icsts, probing wi�h ;i ';:-inch-diamcicr stccl probc rod, or by proof-rolling with on-sitc cyuipment. <br /> PJo,�'�� svtG-nq�_U/ GEOENGItlE[N5� �� <br />