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13!E!flilill
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<br /> DRILLING, Wi-:LL.. lsbtl`.-il"I l..Il TiL7E f1PdD '�frhSk'L_[IJG 1'IiUi1]LCJL
<br /> DR1LLIIVF-
<br /> J71ri,ar tc, ary drilling rr^ e:xcavahi:,r as^tivitira-=,
<br /> Underg roursd Servi,:n� Alert (13";A) will be c0r:.;aCter1 to prank all
<br /> s_,nderprokrjd utility linea in the vicinity c:.f the prof+,_,�'-d
<br /> work. fall r,eces ary PermitEj will bE' obtairsed and 48 hr�,,.W
<br /> r,,-=t ific�.tir_r, tc= the land agency will he given prior tc, the
<br /> cpw,rnrner,(zeraRr,t of dri 11 irng.
<br /> Eic=rir-,gs wi 1l be dri.l led s_rsinra hollow-stern ,auger •with n'r-'
<br /> less than, N nr_h diameter SID) ar�d 5 3/4 outside diarn(2ter
<br /> iCD). ly
<br /> All dri 11ir,a eQU).Pr,c:rst wz
<br /> llta thc'r'' )1er'irtrada'ction cr"
<br /> clr?ar,ed before drilling ber�iri5 u pr--vent
<br /> col-Itarninatir.,n fr,:,rn of;=-site, and between borings cc, preverst
<br /> urt+s5-cO1',t arni r,at ion.
<br /> All borings will bre jugged by a q_ralified gEc,lc,uisL
<br /> using the lJrs fled Soil Classificat=cr7 System. The color,
<br /> texture, rA0i5ttir^e, Plasticity (if ap;alicablea can; evidEn
<br /> pertinerst soils or bedrock. characteri5ti,cs* and
<br /> c,f ccn�staminatiors will be noted 95.
<br /> bearing zoyles arid the depths at which they were e-,cc�ur,ter~ed
<br /> r .y will be noted c,r, the logs. All loos will be reviewed by a
<br /> Californij State Register-ed Civil Enginet:r and verified
<br /> correct. A sample Of the material logged i:a to be collected
<br /> a ;d reta=ined for furthrar analysis and ve,^ificati, n.
<br /> The bGr ngS will be drill,1 i ir, such a manner as to
<br /> prev cross-c,antarniriat on, between stt~ata. Cxploratr_,ry sell
<br /> borings will be backfilled with a neat cement/�7� bentarrite err^
<br /> nine sack sand cement slurry. Soil borings that encounter
<br /> grcur,duiater will be abandoned by first placing a One foc.t .
<br /> .. the b--ttor,l r_,$ the boring ar,d then
<br /> layer of bentonite
<br /> backfilling as, stated above. f /
<br /> Eby. e --
<br /> If 3 deeper aquifer is to be irrvestigated, conductor
<br /> casing will first be yrou', ed ir,t= place to seal off the trPper'
<br /> if nece
<br /> aquifer(s), ir, serieE ssary, ae d� uL1hF.s been allowed
<br /> through the conductc,r c1l'is~19 after "he S
<br /> to properly, if evidence, OT the is rated
<br /> during drilling, the drilling will be halted Until the
<br /> nrcfessic.rat dt_terair,e� the �rv,4ability `rf. _..._
<br /> deeper dri II ir,g.
<br /> Upon terra nat,ior,, b�,r^ings irotc, the shtQ)-ated :Erse will
<br /> either be cc•mPleted as monitoring tar extra[_tic. ecti� 1-1wells, orbackfilled with rrertar,ite/ccmerrt cr crri,er,r slurry
<br /> as described abi,ve. Soil bt,rir-19S greaten~ th rn ter f'Al in
<br /> dwpzh will . be bac'k.filir-d by treinrnyir,g tht mater ial. All
<br /> a di�,mett r aj: le ,rY + ircFrF s
<br /> Dorings for vrell,s rill it =` rtr_ b�
<br /> yee7+er^ thanthe inside d3weall ca
<br /> awet r Of the . ir,u
<br /> ,1519 _
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