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OE'�u� ly9E UE:4? :OE:a'OJ?5 JFlqbrti i' FuTEtI <br /> FHGE f�J <br /> . I ( `- �N YOOSO <br /> I Thom�e Jones pp�� <br /> IM�rch 1�. tODd <br /> The borinps wen drill�d on January 19, 1990, ucinp a Wck-mountad, hollow-�tem �up�r drill. <br /> Samples wero t�kan •c 5•toot IntaNal� with a standerd p�n�Vstion �amplar. fiis aptit-spoon <br /> samplar, which haa a 2-inch outside di�meter, Is driv�n into ths �oil wilh a 140•pound hamm�r <br /> fwllinq 30 incnes. 7ha number of blowa required to adwnca the sampl�r a qiven distance Ie an I <br /> indicatlon of the soil derisity or conslstency. A pe,otachnical �nqln�ar from our staff obsened th• <br /> dnlllnq procass, 1o90ed the tast borinps, and obtalned ropneent�tivs semp�as of the soil <br /> ( ancountared. The Tast 9onnp l.ops are aftachaa as Platet 7 throuqh 9. <br /> Our te�t pics and tesl borinps reveeled fill dapMs ot 3 and 11 1��t on Lot 11, 4 and 15 feet on Lot <br /> 11, 12 and 1 i teet on Lot 12, a�nd undar 4 het on Lot 13. Th� fill on the lots con�ists oi �tlphUy <br /> tilty to silty s�nd with Silt. Sorc�e of lhs NI� containc concnt� d�bri�, o�p�nic material, �nd wood <br /> dsbris. Locs �0 and 11 contain b•twe�n 3 and t5 t�at ot o�d fi�� overtyinq looe� to medium-een�� <br /> sand and sil,y sand. Likewise, lot 12 appean to ba aurtuad with aDout 12 leet of BII. Und�Ayinp <br /> the flll and old topeoil, we encouotend looea, silty, fine•grained sand and eilt ovr�yin9 de���P eand <br /> I and iilt to the maximum explared d�pth ai 2B is�t. <br /> Yhs ilnal lops repr�sant our interpretations ot the fiela loqt and I�boratory tests. The s►ralificatlon <br /> line� on the �oas represent tho approximate boundari�s between soil types at Ihe exploraUcn <br /> locations. The �ctual vansluon between soil rypea may be pndual, and subaurtoce conditlon� can i <br /> very betwoen �xploration locauons. The lofls provide sp�cific �ubsuAace intormation only et ths <br /> locetions tested. The rolaUve densltias and moisture deactfptlon� indlcated on th� bst hol� lops <br /> � aro intsrpretiv�deacriptions ba�atl on tha conditiona obs�nod durfnp exav�tion. <br /> Th� compaction ot backflll was not In the scop� of our services. Loo�e soil will thanfora b� founC <br /> i In the aroa of ths tast pits. If this proaents a problam, ths backfill will n�ed to ba remov�d �nd <br /> npl�eed with sWctural fill duriny eonawetlon. <br /> I (irou dw�t�r <br /> � <br /> Parchod proundwater seepApe was obs�rv�d in Te�1 Pit 8. Th� tea► holes w�rs IeR op�n for only <br /> a short time period. Thentore, tho �aep�pe i�vet� on the lops roprosent the locatlon of tranafent <br /> water seepapo and may not indicat� the static prounOwaUr level. It �hould be not�d t�at � <br /> proundwater ievels very season�lly with niniall and other factora. W� enGcipate th�t proundwet�r i ' <br /> � coula ba luund �n mor� permeable soil leyen and betwaen the naor•surface, w�at��nd soil �nd <br /> I the undedying denser aoll. � <br /> ! <br /> CONCLU$1 NS ANQ RECOMMENDAiIONS <br /> I � <br /> The conslr�ction ot residences on the four lots appsers to be feosibte irom a peotechnic�l <br /> standpoint. 4ow�ver, due to tne depth of ths oxistlnp fill on Lot: 10, 11, and 12, w� r�commend <br /> i aupportinp Ne homas on thaso lotc on deap foundaUon systems that extond down to ths <br /> I competent, naUv�, sllly sand. I <br /> Drillvd concrate piers or dAven pipo pil�• are probaDly th� most economlcal de�p fou�d�tlon <br /> systema. Due lo the wat, loose fill, the cas�np of snme of lh� drilled plers would probably bs <br /> Ineceasary. To prevent crackinp and settlement, the Iiving space slaDs s�ould b� �tructuraliy <br /> Ioeorecn contui.T�rrro,n+e <br />