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'~~,~ CORE LABORATORIES
<br />Western Atlas
<br />International
<br />Sample Delivery Group Narrative
<br />Date: June 16, 1993
<br />Customer: Battle Mountain Gold
<br />Project: San Luis
<br />Core Laboratories Project Number: 930867
<br />On May 21, 1993, Core Laboratories received 2 water samples for
<br />metal and general inorganic analysis. The following information is
<br />pertinent to the interpretation of this data package.
<br />After a thorough review of the raw data for job 930867, it was
<br />noticed that the WAD-CN result for samples POST DETOX and CPLD
<br />exceeded the T-CN result. Except for T-CN on sample CPLD, the
<br />samples were reanalyzed for WAD-CN and T-CN and reported under Core
<br />ID 930867 (3-4). Sample CPLD was originally analyzed and duplicated
<br />for T-CN on June 1, 1993. The duplicate value is reported as the
<br />reanalysis value under Core ID 930867-4. Reanalysis was performed
<br />within EPA recommended holding time for WAD-CN on sample POST DETOX
<br />and T-CN on CPLD.
<br />In an effort to more effectively perform reanalysis for T-CN and WAD-
<br />CN within the EPA recommended holding of 14 days, quality control for
<br />reanalysis will consist of a laboratory control sample and
<br />calibration verification.
<br />~, ;
<br />Patrick J. McEntee Linda L. Benkers
<br />Senior Chemist QA/QC Coordinator
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