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',~~~ CORE LABOF#ATORIES <br />WetCern Atle~ <br />international <br />D.x. ~F <br />BATTLE HODNTAIN GOLD <br />Rinsing Procedure <br />Job Number 922125 <br />February 3, 1993 <br />A rinsing procedure was performed on 12 tailings solid submitted <br />by Battle Mountain Gold on November 25, 1992. The s mples were <br />rinsed with a solution consisting of deionized water ith the pH <br />adjusted to 5.0-5.5. The rinsing was performed by mixing <br />approximately a 12 to 1 liquid to solid ratio in ~ zero head <br />space container and allowing the solution to equilibrate <br />overnight. The liquid was then decanted and analyzed for pH and <br />conductivity. This rinsing procedure was continued u til the pH <br />of the leachates had either turned acidic or sta ilized for <br />three rinsing cycles. A summary of data generated) from each <br />sample is listed below. <br /> <br />SAIiPLS NO........: 922125-1 <br />CLIEN'P ID......... #1 0-18" <br />LIQ/SOL RATIO....: 12:1 <br />pH TEST ![ETHOD...: 150.1 (1) <br />COND TEST HI:THOD.: 120.1 (1) <br /> COND OF <br /> pH OF pH OF LEACHATE <br />RINSE CYCLE N0. RINSE SOLUTION LEACHATE (umhos/cm) <br /> <br />1 5.15 7.40 410 <br />2 5.13 7.99 93 <br />3 5.19 8.95 63 <br />4 5.17 9.33 40 <br />5 5.17 9.04 60 <br />6 5.20 9.34 38 <br />7 5.16 9.11 40 <br />8 5.20 9.07 33 <br />9 5.15 9.20 29 <br /> <br />m..n.rysn. mr.ee. a ~YroYYVn maa..u ~e ~m...pm Ye mseo uom oosmauo~um mauar ww'.ra a.'~e ce~r'o' ..o.. onm~.e .m wnmemm vw rnwew+nu one ma. *n. mnaeurms o, ao^~oes ao'ea.c ~•na <br />..ni m. GY eepnnnatu~l.m,nw.. Wr.um.ron.. nwem nwmes no ~nN^oe.h .m ma~a a.aw~n m'eoe,..r.r o-s e. ns n~mn+m aro rn.ammmn o•ox near o, mY~oeros o~a~~o. qu m. a~ <br />aM nxrwY.agwT.Yla yrp ~n aVree~On..n.nU SU[n rep)n nusN O~'n~ep uWnra any reuon .narerc.n ~n ew,. vx ryNuW e.cegl ~n rls emnera •~nW~l! afpo,ar ar COre La4'are~~M <br />