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<br />BATTLE MOUNTAIN RESOURCES. INC. <br />November 17, 1994 <br />Mr. David Marshall <br />Core Laboratories <br />10703 East Bethany Drive c~ioco~iwn~'r <br />Aurora, Colorado 80014-2696 <br />Re: Battle Mountain Resources, Inc. (BMRI) - San Luis Project <br />Water Sampling Protocol <br />Dear Mr. Marshall: <br />After two different instances of anomalous readings, once. with <br />cyanide and once wi;.i~ oil s:ad grea.;e, this lerra.r i,s ha;mg <br />written to remind Core labs of the protocol that must be followed <br />with all water samples. Analytical accuracy, precision, <br />reproducibility, and sensitivity must be consistent with the data <br />reported in USEPA EPA-600/4-79-020 or, where these data Are <br />unavailable for individual analytical protocols, consistent with <br />data reported in APHA/AWWA "Standard Methods for Examinattion of <br />Water and Wastewater", 17th Edition, 1989. <br />A copy of Core Lab's "Analytical Chemistry Division Quality <br />Assurance Manual", SOP #HC-QAC-02, is enclosed. This manual can <br />be found in BMRI's TR-06 as Appendix A. Please ensure that all <br />lab personnel are following this manual when analyzing water <br />samples. <br />Sincerely, <br />I / <br />Sall_y H _ es <br />Environmental Engineer <br />cc: Anne Baldrige <br />Dan Robertson <br />Alana Scott <br />Jim Dillie, Division of Minerals and Geology <br />d SURSIDI4 RI' UG R,ITI/!. 5l! R'\Tdl]'Gl1l P CO.NP,NY <br />Y.O.BOX iIU SAV LCIS.IOLORA UU ri115'~0?IU 1719167?JJ6' FAX 17141 G7I 336} <br />