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01 May 2005 <br /> AGE7NC Project No.,0 0 11 <br /> Page 5 of 7 <br /> Follo ' - - <br /> wing soil or Water sample collection,each preserved sample container w.1 be labeled with the , <br /> bo ll locati ep date d sam er's initials: A ro Xtatel sealed and labeled <br /> rntngfwe on, d th,.,trme; <br /> �� i� <br /> Pp p -. y -„ <br /> sairtples will be placed :a chtile4 contai a under',ire. and transported under chain-of-custody <br /> procedure to,aI7kS'-certified laboratory: <br /> Laboratory reports for soilor aid d water atnalysis; testing ,methods, laboratory quality' <br /> =,q ty uatli- conte blCAlQC)reporEs, and sample chain of custody:documentation will be <br /> presentedi a wth <br /> tngadisnrecOn3mendations. <br /> 3:3" IML C6M",L, F N_ <br /> After collection of a,,grab water sa rple.at approximately 75 feet bsg-from each,boring; die void <br /> space between &5-a <br /> nd 75 feet bsg will be backfilled,with 3%81?inch coated'bentonite pellets (pell <br /> plug), <br /> Foltnvvin .plat of boom befntomte'peilets,each well will be completed as asingle-casing <br /> ground water.momtoritng well,utilizing 2`inch diaineter schedule 40 polyvinylchloride�'VC)0:030- <br /> inch slotted well screen and blank well casing.Based on geologic conditions;a 20-foot length of well, <br /> screen is anticipated x for.installatoin of'=monitoring wells.. 'die screened;zntev will be placed <br /> approximatelyl 5 feetbelow the water table:A tlt gram for the:proposed copstruction ofwells MW-4 <br /> and:Mv -5 is depicted ip.Figure 4, <br /> Atter instailitg.tlie.welt ai wi g,filter papk tnata ad consisting ofpre=washed#2112 Lonestar sand <br /> will:be added'over 1h6screened.i0beryal tcs-approncimately`two:feet-abirve the screened interval. <br /> IF ollowing plaoenneirt.of the filter pack,,the well.-will be iurrSecl with a diameter surge;block <br /> to assist-m settling, filter pack fc r approximately 20 minutes: dditionai sntnd.will be added if <br /> settling occurs. <br /> A nominal two-fapt.bentonite seal,'(% bentonite,chips)will'be_plaeedxabave tkie.f bier pack to <br /> minimize the potential for gtontpcnetrataton into the screened section-ofthe�well.The bentonite seal <br /> will-be jbrmedby pouring bentonit¢child :into the-annulus.aad.allow g diem to settle on the filter <br /> - pack€.The bentaai chips will be hydtated using approximately five gallons of tap water and allowed <br /> to hydrae for a mimmurii of one hour,prior.to grouting <br /> The <br /> remaining-.annular space wdl be filled to the and surface with a cement grout. The grout <br /> InIxture'wil1 consist of Type MI Poiiland n eat cement and not more'than 6 gallons of mater per 9+- <br /> pound sack of cement. T $tet will be placed by pumping through tremgue pipe grouting <br /> inspection will.be sched, 'with SJCEHD personnel: <br /> 1l*=wdGeoanvlronwent4Inc: <br />