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i <br /> i <br /> � n � I <br /> ar �a <br /> "' � y Report <br /> iOc ° C:onin Custom Homes , <br /> �h y y lanuary 30, 1991 <br /> M � X <br /> K n p:l�Z .7 <br /> H s1 <br /> y H �V <br /> c x � f:om 3 t2et ro in exc�ss ot 12 teec in Test Pit C, �vhere tha botcom o[ fill was not observed. The till <br /> x � � ror.siss of silty sand wi[h ;rave�, with �ccasional de6ris and or;anics. The upper 3 to 3 feet wy <br /> ai � n icund m be loose, with the underl}'ing fd! baing medium dansa to dense. Ttte fill appear�:d ro be <br /> � y � iomervha[ Iocally derived, much like the ma[zrial obsen'td in the I7IIISIdZ IO [I1L WCSL Bz�O`� �he fill <br /> o �' M ::;a exPlora[ions encountered a m�dium densz sand wi[h vary�n; amoun[s �t si:t. <br /> n o ti <br /> zy y Groundwatzc was observzcl seeping from che upper loose fill, and in the native sand observ <br /> H O fn <br /> below the fill. The medium dense Y�ll is fairly impzrmeable and pzrches the upper ground wa[er in e <br /> loose t�!1. Pockets wichin che 611 also hold small amounts of ;raund wacer. The ;round wa[er found <br /> b�1o�v che till appears ro reprzsent che ori;inal ground surfacz oP the iormer low lyin; arw. I �xpec[ <br /> :hat �;is «acer is nezr L�e szme a!evucion as [nz standin_ watzr obszrved in thz luw area co ;ha soueh. <br /> CO\CLtiSIO\S AND RL'-=0�'ihiLND��TIONS <br /> GG�ERAL <br /> �e...,,,' Tt;z site should ba rompaeib;z u•ich che planned davelopmzn[. Tna przvious repoa which � <br /> �� .:C','e:;;d Lh� SCdz� SIODd IO [hz �vasc round che slope ro b� stabla wi[h respec[ to dezp slidzs. Some <br /> 1 �� <br /> nr�caurons cor erosion ar.d sloughin; are discusszd in thz report. The tlll that was placed on site does <br /> "'� r,o[ �r°^r to have bezn nlac�d ovar or;ani;: suils that �sould b� expz��=d �n ��w lyin; are:s• <br /> � � �,, �_ <br /> �� Theraiore, sattlzmrnt of the till duz ro de;r�dation <br /> Substar.tizl or_anics ��'ere not ubs�n�ui in cha till. <br /> Oi Oi�('.Gle ::l:i:i2i Sf10L1I(I �L :151'_Ili[IC[l�i hS�dL J❑ i:l.: O�JSd:V3IlOR5. ��I�::.^�S 1:t' $I10\4II �2C b1C:i '., _ �. . '. <br /> ; � i;nm any wt;l7nd areas tna[ migr[ causa focnd�[iun difliculties. <br /> i� <br /> s � <br /> Bu;ldin; founda[ions �,�iil rzquira lot and strucmrz dependznt eva�uauons dua [u [.he :itL The ti11 ; <br /> � , � laced in a manner that would mzet commonly accep[ed an;in�zn°� <br /> ��� � does no[ �ppe..red [o ha��a be=. p <br /> � ion s� �or. Howeo'ar, ic «'as observui to be medium densz ro dansz in � <br /> s[andards used for tound_� p, � <br /> � <br /> most zreas balow abou[ 3 ize[ and may mw[ �crr.naction scar.dards for .oadway construction, althoa^,h i y <br /> 1 �Q.,p :his «��s r,o[ [es[zd. 1[ :dso app-ars tha[ chz si[z may h�va been propzrlq stripn,cl prio; ro tillin;, as a � <br /> � �r <br /> thic.l- vz;c:ative layer and topsoil thz[ would be dxpt�[ed in low areas was not faund. ' � <br /> �� I undzrstar.d dia[ the Ci�y of 6ve:c[t may requira [hat all till under road�vay ali;nmcnts be <br /> ' comoac:ed to minimum er.;ine�r�n; standards. Since [.kz fill appears medium dense balow abouc 3 <br /> fze[, I rzcommend th�t durin, .ons[rur,ion of tne rozdway [hat th�� till be c�sczd and aro:is not mze[in; <br /> COU�'TtGTTG GEOTECIi\IG�L ��GIYEL•RI\G <br /> ��------ <br />