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�EC-18-2004 09 :52 AM H. M. BOWER 828 724 4643 P. 03 _ 1925 i.akcview Terraa,Orono 11�II�1 -3- this would indicate soil not firom a pit pr a uniform source, but most likely waste soil from . �urea proj�cts and possibly spoil from adjacent ditch construction.For th�sa and o#ier reasons , (including absence of passing density tests), this soil must Ue classcd as "uncontrolled fill". Below the shallow depth uncontrolled fill in Borings 1 through 4 is peat and organic soil in the form of sapric (lughly de�omposed) peat(PT) at first and organ�� clay(O.H) in lower reache�. 'Che buried organic sail in Soring S is thinner,consisting of arganic Clay only.These are palustrine(swamp origin}deposits. They are highly prone to settlemer�t or conso�idation. �'hese soils nor the uncontrollcd fill abave should be trustcd for adequate support of controlled fill �nd structures primarily due to potential for excessive totai and difFerential .setllement. As indicated above,placement of residential structures on or over organic soil is prohibited by buiiding cade in a�ey event. The basic soil found in this investigation is typical of the area. It is predominantly a lean ciay (CL.�, usually sandy ar with a noticegbte sand content and a small gr�vel content. The first material encountered in Borings 1,2 and 4 is soft to very soft and is a l�custrine deposit, �aid down by slow or stagnant water(most Iikely a lake). ,An analysis of elevations of onsets and dissipation of this materia!indicates that this depc�sit slopes downward to the northwest_ But,and most importarttly,this material is only normaIly consolid�ted or slightiy better. That is,it has apparently settled down and consqlidated only enough to�upport its own weight attd possibly the weight af the uncontroiled �ill �bnve. Any additional weight, such as that of replacement corrtroll�d �tll �nd structure weight or Iandscaping material, would trigger further eonsolidation (loss af water content) and significant settlement. Most clays in this area are overconsolidated, usually as a result of tens �of tht�usands of years of an . - overburdening glacier sl w forcing water out. However, in this case, the deposit appears ta be originating after the last glacial period. With depth, mater�ia�s become sandier and better consolidated. These materiats src gl�cial till and persist to bori�g t,erminatiat�. Labaratory tests were performed upon representative sample a�the lean clays found in a1l borings. The results of the most important test (Atterberg Limits) are contained in test reports attached to this report behind the bore logs. These results are �iso indicated on the logs in summary form. Moisture contents�t other locations are reported onfy at appropriate locatians on the boring logs. Especially regarding the upper lean clay in Borings 1,2 �nd 4, the tests indicate somewhat high moisture contern at �rst (41%�-50%) with a correspondingly low estimated dry density. 'These moisttue contents are fairly close ta or above the liquid iimit(43.6%), confuming that they have undergone oniy slightly better than normal consolidation. Moisture contents at only a sli�htly lower level (35%± and lov�rer) indica#e a better degree of overconsolidation to date. Refusal to auger advancement was not encountered in the borings, indicating lack of bedrack to depths drilled. Soil moisture contents of soil encountered varies with depth. As indieated above, upper material in three borin�s are generally of elevated moisture content. But,there sometimes is a thin layer of lower moi;�ture content clay above,just belaw the buried organic soil. This is what is known�.�a"felse battom". Eventually,moisture contents become more normal with depth. Free groundvva�er was found in the three mentianed barings as indicated by standin� water in the bore holes a�ter a standard period of monitorin�. The recovered naharally