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<br /> 7, /1 IIIreaded end-cap will tae placed of Yhs:'notlom-tmast Sk:Clioo of well ticrccn and will 6c latvcrcc[
<br /> into the opsin Snare Mule.
<br /> ^ tt the well scrccn will be Ihneeded,togelller,as eded,until Clic appropria
<br /> 8.. /lslslitional lete umal
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<br /> we Il scrccn lenglla is :u'hieved. No Ct:rtlCttl or (lee will lac used.
<br /> q. Solid well casing will be threaded onto the wcli screen scclion Io complete the well to a height
<br /> approxinrllely 2 feet a[aove the grosuul surface. No cementllle will be used.
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<br /> M- Once tilt'well screen Ansi v�clntlhcjj�shorc hnlve lclty.ilElandltEulaWelllserce[l.,,Ile lypl,oftl'iller plack
<br /> t „ placekt in the annulus bet
<br /> '4r material used will depend un the bcnlob'' `ormation that the (cure hole penetrates. 'l'h�fillet
<br /> pack material will be of a larger grtin size than that of the surrounding s,colugic torso llinu and,
<br /> in r;cncrat, LVl1f C471151tit of 1/ft-inch sttaxitntstLL diatatctet washc( s,rtvcl-
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<br /> l 1. Tho auger flights or steel casing arc then raised nut of[hc bare haale,thcrclty allowing the filter
<br /> pact: material to settle out into lite space once occuprul by Ifle auml. flights us steel casing.
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<br /> Additional filter (crack material is placed around the Lvcll :md the auger Ilit;hls/steel 1'a::ing is
<br /> scnjovc+l usttil such titmc as the tiller pack, nulterial is enc liwt :Ihove the top of the screened
<br /> interval.
<br /> t l2. Once the filter pack material has a minuLLuns thickness of enc foot of 6enlonite
<br /> crtunblk:s is vM011ced "hove the filter pact in the anntlluS of the bore 'Irak ko provide a
<br /> 1 ;. LVa[CC[Ik;h[Ia1C[Ik'lit tialal.
<br /> 13. Once the bentonite seal lits tai:cn em(alaced, ths: rc mainder of the lxxc !Cole annulus will be
<br /> t _ grouted to prevent surface water infiltr4lion ur short-circnitirig of air tlow when a vacuum is
<br /> t { applied to Ilse well.
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<br /> 14- Unless Otherwise specified, the grout materiA used will be a miatuse of I)Ortland celucnt and
<br /> bentonite powder.
<br /> 15 Prepare the grout mixture in:r mixing drum. The_appropriate amount of cement.Ind bentonite
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<br /> is mixed in the drum with ntunici(aai water and st rred until uniform cnnsistcstcy is adsicvecl.
<br /> 1Ei, Grouting will tae performed 6y pouring the grout mixture into the annulus between the well
<br /> casing and the lacare]tole w;111. The;drill rig auger flights/steel casing will be removed from the
<br /> bore Male as!tooling takes place to allow the grout nitxture to contpfetely fill[he annulus sfsace.
<br /> A i 17. Stems 15 and 16 ase repeated until the;annuiuS space has bcc❑groulc tl up to the ground surface.
<br /> Ig For well protection a11s1 security, a steel proteclivC casing Lvith a locking cap will he insta let
<br /> r from one foot laelow grade to three feet above the sstrfoce. If tim wetl was installed in a
<br /> roadway,the steel protect'sve casissg will lac installed to a height slightly alaovc the road surface
<br /> to prevent the inflow of surface waters.
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<br /> 19. Well prutcction and security may differ from that described in step l8 if enginecrutg
<br /> remediation de-sign n dictates thess'sty for stLmetlting different.
<br /> 2(1. Decott[nminate all eduipmeni prior to moving ua the next location. See SUP 7001 for
<br /> procedures concerning ecluipment decontamination.
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