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~/1/~ <br />Western Atlas <br />International <br />„P~ o.p,5., ~.,,.rv,^. <br />Customer: Battle <br />Project: San Luis <br />Core Laboratories <br />CORE LABOF~ATORIES <br />Sample Delivery Group Narrative <br />Mountain Gold <br />Project Number: 930739 <br />On May 7, 1993, Core Laboratories received 1 water sample for <br />cyanide analysis. The following information is pertinent to the <br />interpretation of this data package. <br />After a thorough review of the raw data for job 930739, it was <br />noticed that the weak acid dissociable cyanide result for POST DETOX <br />exceeded the total cyanide result. The sample was reanalyzed for <br />weak acid dissociable cyanide on May 21, 1993, and reported under <br />Core ID 930739-3. Reanalysis was performed past the EPA recommended <br />holding time of 14 days and as a result some degradation has <br />occurred. Sample POST DETOX originally was analyzed in duplicate for <br />total cyanide on May 14, 1993. The duplicate analysis is reported <br />under Core ID 930739-3. <br />A method spike was not reported for weak acid dissociable cyanide <br />analyzed on May 21, 1993. A method spike was analyzed but resulted <br />in a low recovery. Due to limited sample volume, the sample could <br />not be respiked at a later date. However, a sample from this batch <br />was spiked on May 24, 1993, and met quality assurance requirements <br />(80~ recovery). The reason for the poor spike recovery is under <br />investigation. <br />`fir /~ ~~;, ~ ~., ~-:~. ~,t~~ <br />Patrick J. McEntee L1nda L. Benkers <br />Senior Chemist QA/QC Coordinator <br />0 ^' <br />ne dnd'v 5e50V n. ns. -'C['e'i'd^s[O M anaV ~n rn.y iemn d'e g13N UWn ccSP'y ar~onf JN mdrP ~u~su OO~~N ~.I^P Oe ~l Vr nnos<e~:_5•ea'V CP~de~l~d'u5e ~^4'ery~eap tten Ta]P lnn'nrprpre la loo np 0~06n~M5 p.Ores sad ~. ['e <br />pm me msl uoamed - ~ [ .dm~arsrs Cov lawraronPt ra.e.•r ass.mw -r'e5mnro.,n, d•a m~.er ro na+dnn .•,•o•ese^sc-5 ae,eas c,mo.pd i4 ro lre o~w'.u~~~n mooe aceow~s c mOrnamen~55 0' d^. o laf ,a e <br />.fir oval oowa~ •e e^c-¢ .c.o •m one wrn ew S.tec~ •e _mn'o~an.~wwn a^alsoP.4~ n eo:n a y ao tr_cw e.re0~~^rs Pnu erv .r wr.+pa enpmo. d.m Cae Sam~no~es <br />