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B11-0225 Open Hole Observations_091611
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'Th� prc���s�d r��inin� vval� sho�ald be s�pp�rted �n th� �ndi� rbed a�elly sat�d, �vit� �onver�tiana� t3'p� spr��d fc�c�ti�g�, d�si ed for � m i �a �licava�bl� scsi� �a��rir�g �ress�zre �sf 20Q0 p�f �� � �ti� ��� � ati� �. �" 'Y ' 'T'��� ��p�a� p����n�s th� r�suits �f �. �ubsurface �c�i1 and F'e�u�adati�� �n��sti��tic�� fc�t° th� pr€�pc�s�d �°et�i�iz�� �val� �� b� r����srts� �t�d �ra 3 , tc�s�k C�g �aii as �ch���, F'ili�� 2� 245 � CC�� is�l� rav�, 'Tsa�n �f ��il, ���1� �c�aanty, �al�r�d�a. `I`he pu os� af �he stzbsurfa�� sc�il �r�d fa��r�dati�� i���sti�ati�� w�� �� d�t� ir�� th� ��gir�e�ring �hara�teris�ics �af �h� �czundat��� sc�€1 ��d �� pravid� t°��� ��datic���s fr�r� � C���atec�r�i��l �oint af vie� for t1�e retair�ittg �v�11 fc���td�tic�n ''' desi , ���di��, �r�d dr�ir����. ' �I � I I,�t 3 is � a 17SSs���� lot, �sz� �h� �ast �id� �f C�armiseh I�ri��, in th� �Iaz� I:�a� S��c�r�� Stabdi�is���s Tc� e�f �I� �I, Ea�t� ���t�ty, �at�radc�a �`he t�pagraphy c�f � ��t �s rrts�de��t�e r�i���� �s t� � ss���h ��d ��st. V��ett��i�n �n th� lmt ��rtsist�d o� Iandse�p�d ass ar�d pirt�s9 L�a� 3 h� s �� ��ist��� d�p1��. T'h� ���stirtg �°�t�,inir�� �a�l s�pp�rts the dr�v�way at�d parlcing abav� a�d �h� s����s� th�t ' pr�s��d�s ����ss t� th� �c���r I��r�I c�� th� �xisti�ag r�sidenc�. '�'he retainic�g wall is abc��t 10 �°��� t�.11 arad i� ��tt����ty b���1�d �nd �r��l��d; ' 3 ' P�2��C��E�? ��N�TI�IT�'TI(��T ', 'Th� �rs�g�e�s�d �� zr�i�t� vv�ll r�-�csns�ru��iar� �ill cc�r�sist c�f a°e�€�vi�g th� �xis�i�� ��I ��d �e�z�s�°�z��i�zg � r��� q c� tl�r r�t�in�t�� �all �uith � ���v stairc�se. �.,c�ads a�e ant4���a��d �e� 6� li�htg tYpic� l �sf r��id��tia� �c��s� ��ic��. ' If th� �r��li��d �I��s� d°z�'f�� �z�r�if�antly frana th� �bove �ar�d�rstar�din�, �e �ho�Id b� �c�tif�d �� r���alu�te t�� r��carr� endati��s of this r�paa�. ' F` + SI AI ' `I'h� f�ld it���s�i��tic��� �s��adu�t�d e�� J� ly 23 , 2010� co�asisted af bc�rir��, Img�rr�� and s�mpl�r�� c�r�� ��s� barin�. � test bc��ga��' s ��cat��� is shown a�n ra�ving I�s�. 1 . rillirs� �f th� ���t ' bs�rit�� �r�� dc�a�� �a��h � 4��r��h di� et�r, �or�ti�uc� i�ht, a ��we�° aug�r, c►� � t ��C e��t���d dr�ll ' ri�a � �h� �h� �a�il prc��t�� ca�` t � ��� b�riz�� a�� tlte Stzbsurface ��plor�ti€�r� Logq �'z �� N�o l. � ' 5��1 s��pl�s for l�bc�r��s�r� �c�i� �na�l�si� ��d �b�� atican �rere t�ken at select�d i��e �1� by ; �dv�r���t�� ���r�d�rd S�l�t Sp�c�rt �r�d �alifc�rnia S� plers with � 144-�aund ha tra�r3 f�l� i�� 30 ia��h�s. , Si.T�SI.T A�� SC�Iid �I� �I2C�iT1�I��t�'T��t �C�I�I'I'I�l'� Th� ���I p�-c�fii� �����a�t�r�d ir� �h� tes� b�rin� is as follows. aring I��. 1 h�d �"a�r ir��h�� cs�° �� h�lt �v�r a� �z�d � hal�' f��t �� br��v�, �ravelly sa�d with c�r�anics av�r 1 f��t �sf brc� �lay�y ' tc� s�l�y, �r�v�lly ��z�d with �s� � �h�l� �°ag �nts. 'I'�� batto mf arir�� N€a. 1 vva� �t �0 f��t b�l�� ! ��ist�rt� �r�d�. e s� �1� th� �c�z� ir� th� t�st b�rin� �� �°�nda�n i�tez�rais. Th� s�i1 �a les �v�r� brc���h� ' ' �� c�u� l�b�r�t�ry �e�r �hs� � tl�a� �r�d ��alysis, e� w�re tested fc�r na ral dry d��sit}�, r�at�trat rr�a�stu�� ��a�ten� and s�v�ll/�c��s�lid�tic�� , as s3�� �z� th� Sw�lllCmnsolidatiaa� T��t �s� 1�s� �`���r� ' 1�Ic�a 1 A ' ' LI�' Engi�eerin�, I�c. 4 �()iT�I)t�°�°I�l� ����1��.�'�'I�N� T°h� �re�p�s�d r�ta���r�� ��.il sh�uid be su�port�d v�ith conv�ntic�nal typ� spr��d f��ati��s, ' de�� �d f�r � z���i�a� � Il��r�bl� s�i� b�aring pr�ss�re af 2Q00 psf. °T�e �`c��t�rag� fc�r �h� z��� , r�t�inin� a� l she���d be p����d �r� �he undgs�tarb�d �layey to salty, g�°a�e�l� sand �vat ��rrs�� �h�l� f�a ����a �"h� under°���c�c� ��rg�ra�e�° ��st cabs��e th�fr�undati��z e�cav�ta�aa tca ve�°a� thc�� th� ���1 �r�rrclz�i�aa�s cr�°� �� �n�i�i�a���c�,fi°car� �1a� bca�ing, ����3n�ac�us fa�nd�tia�z� wa11s sh��1d b� �ve11 re` foreed, t�p and bs�tt� , �� s��� �� , �zF�s�tppa�t�d l�� h c�� �t l��s� 10 ���t. A in` � back� ll e�ver as r�q�i��d by �h� loc�� bi�i�di�� ' d�p�rt ��� shs��ld b� �rc�vi �d fc�r �c�st �ars�t�ctiar� �f the f�soti�g subs�ils. '�`h� fc��znda�a�r� ��cav��ia� shc�uld b� fi°e� fro �xcavatiar� spoilss fro�t, c�rg�ni�� ��d ' star�d��� ��t��a �r�y ���r����vatic�� �vithis� t�e prop�sed fot�ndatian, sho�ld b� ba�kfill�d� ir� � ' ° ���s le�c�s�� 1���1 ���� a�d ca� p��t�d tv 9�°fm �f th� �i � dry d�rasi�y a�td w�thirt 2 p�r���� �� ' th� � ti �rr� c�is��r� �o�t�nt �.s d��� ir�ed ia� � l�b�sratory fr� a Staa�d d I'r��tcaz° t��� (AS`T� A69�� a S�rcz�tur�l fiil, �l���d �ind�r �c�s�ti�gs, sl�a�ld be �ested by the engine�r �� h��° r�pr�s��t�t�v�s c�z� r���zla�° b� sis. ' I F�tz�d�tic�n �v�lls re�a��in� e�r�h azxd r�taini�g s�ructua��s t�at are �at�rally su��esr��d shcs�zld b� d�si �d t� r�sist �� �q�i�al�a�t �id d�nsity �f 60 ��f f�r an "at-rest" ca�ditio�, La��r�l�y a�rar�str�az��d ��rez�tut°�� �°���n�n� th� e�n-��t� earth should be desi�r��d ta ��sist a� �q�iv�l��t flz�id d�nsity �f 40 pcf �s�r th� "���i�r�" ��s�. ; I��ssiv� ��rth p��ssur� �f 3 4 �sf c b� �sed for the lateral pr�ssure agai�st th� ��d�� ��' th� f�aati�aa�s: ��ist�r��� �c� s��di�� at th� b�tto�n c�fthe footirags can b� calculated based �� � �c���"��i�r�� ' �affri��i�sn s�f OsSa LTr�d�s t°b�d �csi� c�� � s� c ral, nt�t�-s�velling �Il cc�rnpact�d t�a IflQ �r��r�t �f th� ' ��i u dry d�resi�� ��d �ithir� 2 ��r��r�� �� tl�� ��ti �t zntafls r� content sl�alt b� �zs�d tc� ���ist ' l���r�� lsaad� � t th� sld�� �f the �`c�c��ira��. L Er�giz���ring� c. ' S 'Th� �bc�v� d�sa� r���r���rada�iar�s �as�t��� drained backfil� ��r�dit�c��s �r�d �. hc�rizt�nt� � ba�k�l� �urf���, S�r�har�� l��di� � d� � t� adjacent s� �t�are�, �ei�ht s�f ��rr�p�rary �t�r�d c�nstx���i��t ��t�ri��s and �qu�p en�� ir���i�ed b�ek�ll a�d hydras�atic pressure dt�e �� z��dr�ir��d ', la�����1 shc�t�ld b� �r��ss c�����d i� �h� de�r�r�o E��ry att��npt should b� �d� ta� pre���t �h� ��ild�� af �ydre�s���i� ��°�ss�z�e behi�d th� �°�t�ia��r�g ��lle a ' T'c� r�d��� th� rxsk af s�zrf�c� wat�r i��ltrating the �€�unda�ia� subsoi�, ir�st� �l�tac�r� c�� � ����d��i�t� p��ira����a dr��n z� ���� �nded �s�� d�tail a� the I��tainiz�� aII Sit� P�a�� 5���� �� l �m It i� �Is� �nti�ipa��d �hat da�t°ir�� th� sprir�g r�ar�aff �eric�d, high gro�and e�vat�r levels �nd ��c���d w���r ������� �vill d�v�l�pe � r��� et�d p�r� �;ter dr�ins at �h� top ar�d bottc� aft�� �°ezcstgr��s ' e�� ba�h �v�l��e Th� f�t��d�tic�� peri �t�x dra` sha��id ��nsist af � 4-inch dia et�� p�rf��°at�d p��� sI€�p�d �s� �. s�zita�il� �r��i�y c������, �ar, t�a a s� � pu �S locatian. T'�e dr��r� shc�uld sl�p� �� ll� i��l� ' p��° ��s�t if �I��ibl� �a�° �� 11� �af ar� ��h i� Y°igid �i�� is e�s�d. `I'he drain pipe sh�auld b� �ai�c�d ��er t�� s��s�ur� b�rri�r ar�d ���r�r�d w��h a i�i u �sf S ir�ch�s e�f s3/4 inch fr�e-drainit�� gr�n�zl�r �.t�ri�l. (3�c�t��til� � ir�� 140� a� �q�ival�n�� should h� used tes cover the f��e-drai� ir�� �r���I tc� pr����t si�t����� �nd �1��gir�� s�f �h� dr�i�. e baelc��1 ab�ve th� d in sho�zld b� gr�r��zl�� ��eri�1 �� ithir� 2 f��t �fth� �r��zr�d s�rfa�� tes pa°ev�nt � b� itdu� �f hydros�a�i� �r�ss�xr�. T'h� tc�p �r�� fcsc�t ' �f �h� b��kf Il ���rial �h���d �e���ist c�f � r�Iata��ly irnpe i�us flla '�'he b�ckfi�l shc��ld b� ��a�pi�g ' ��vv�3� fr� th� b��ldir��e ' I r� A ' 'I'h� fca�les�in� r����rr��r�dat�s�r�s are ��r��ral in rtatc�re. 'The site s�rr�t�nding th� b��Hdir�g �tr���r� �ha�1d sl�ap� a�r�y fr� �h� b�azldi�� ` all dire�ti�ns, t� ir�i u �f I2 �nch�� �z� �h� �i�°�� , 10 �`��� �� r��c����er�d�d ia� ur�pa�r�d �re� s, �n three inch�s ��a �he fi�st 10 fe�t in p�v�d �r��s. 7"�t� ' tap �f �h� �r�r��l�r f��r�d�tzan b��lcf 1� � c�ul b� ��vered �vith a ini u �af ��e fcs�s� c�fr�l� tiv��y ' ` p� ic�� � f l� �c� r�d��� t�� pc�t�a�tial a� ��arfa�� wat�� infaPtratir�� th� faund��ie�r� s�b���l�. 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