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12/10/97 WED 1e:06 FAX eta 6e1 $0e0 tine ENGINEtiitS m003 <br />SOA Corporation <br />December 9, I997 <br />Page t. <br />!. Evaluate prepared aubgrade conditions in pavement scan and at the base of footing <br />excavations prior Io plsoemnit of pavement materials or concrete for footings. Provide <br />racarunendstiorn for ovemc&vation of nay soft, loose or otherwise unsuitable soils <br />encounterod. as appropriate. <br />6. Evaluate fbtal propagation of the floor slab wbptades. <br />7. Monitor cowtaeion of block wills Including foundation subgrade preparation, draimit <br />preparation and the placaaam. of backfdl soils. <br />S. prepare a sumnuuy report aI the eoaciuslon of our wastrucdon morel oring services. <br />Detailed results of out copowaption monitoring services have been presearted in our daily <br />field repays tot the project, twlmbers 1 through 32. dated May 9, 1997 through November 4. <br />1997. Copies of the field reports have been provided w the site superintendent. <br />OBSERVATIONS <br />SUBSURFACE CONDITIONS <br />We evaluated subauriew soil and ground water conditions by exeavatbtg eleven test pits <br />throughout the site. In o"don, we revlowad threes cast pit logs mWiated by Catesde <br />GootechNeal Bngitweting Provided in their lone 4, 1994 report. <br />portiow of Building A and Building B area ware b1a &WAd with fill UP to 9 feet gigolo. Fi11 <br />gawrally consisted of 10080 silly M d with varying .mutts of orgeniee. Beneath the fW' <br />to &M dense to very dame pucW till consisting of silty sand with varying amuats of graved <br />wu aneountered in all of the tat pits. Subsurfwa conditions in the ages of building C oottalated• <br />of dew native glacW tlu. <br />GRADING <br />Both patting and ffiI* were MOM to WW" the detHga grades in the buoug areas. <br />Stt OAW fill used to achieve the dodges trades In the building am ganarally ooedsted of on -site <br />material. Ice-ptaoe density area were oarducted as the stmctuW till wa placed and eompsaed. <br />paved arsu wets brought to grada using on -site native gladd till and on -site silty sera with <br />organtic$ (pr.viaaly placed fill). In general the till conYieleg 0111412110 was of marginal 4tutlty <br />and was placed in the lows elevations Of the light traffic area (pnkh* northson of Building S. <br />This material was compaead to the agent possible. A gootextite fabric was phwW over these <br />areas and upped with Z feet of structural fill cOrop&OW to 95 poroeut. FIJI placed in tte heavy <br />traffic arm was compacted to 95 paces. <br />The on -site sold war& generanwm generally above optimoisture for effective compact'=' This <br />ra4uimd couidenble aetadon and, on 000uio8 the addition of lino to tt:duee mnt+ <br />oiature conte <br />enough to achieve adequate compaction. Our obs rwiom and test result& Ird ws that the <br />etnraursl fill was compacted to general bwmdsrtoe with our recoomandutons. <br />pM Me. Se0140347-1170 <br />o 0 0 B g a 1 e f t f <br />