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;r~ - ` III IIIIIIIIIIIIIIII ~ <br />~~, <br />ENG/NEERS/CONSTRUCTORS /NC. <br />• Exhibit E <br />~-~~r A <br />3 ~ <br />r <br />M E M O R A N D U M <br />70: <br />CC: <br />FROM: <br />DATE: <br />SUBJECT <br />BMG - San Luis <br />And rd Douchane - BMG <br />Dick Eamon - BEI <br />Grant Shelton - BEI <br />T.C. Shutt <br />April 16, 1992 <br />CHEMICAL ANALYTICAL MATRIX <br />Objectives: <br />t. Reduce Free-CN as quickly as possible <br />2. Confirm (1) by analysis <br />3. Determine accuracy of analytical data <br />Testing System <br />1. BMG - San Luis Analyses <br />RECEI~lE~ <br />APR 151992 <br />Battle Englewoodo(d Co. <br />Colorado state requires daily data until further notice on one set of analytical <br />results. The report sheet, attached as "Daily Log of Analytical Results," are <br />those tests required. <br />The full matrix should be completed only for samples taken on Monday and <br />Wednesday (more about this later in the memo). All samples taken on the other <br />working days should be analyzed only for (CN)~. <br />In addition to the daily analyses for (CN)- you should take a sample once a week <br />from the collector pond and analyze for total cyanide, WAD cyahide, and Cu. <br />2. Third-Party Analyses <br />(a) For the foreseeable future we shall use 2, third-party labs as back-up to <br />your data. At the time of writing we have accepted Acculab and Analytica, <br />and eliminated Hazen, Hauser, Skyline and Barringer. <br />(b) We shall "check-test" the accuracy of BMG and third-party labs by having <br />all of you analyze a previously certified "unknown" sample. Said sample <br />to be prepared by a lab known only to BEI. You wi1T b6 notified as to <br />which is the "unknown." <br />Irongate a, Swte 200 •777 South Wadsworth Blvd. • Lakewood, Colorado 80226 • Telephone (303) 9894921 • FAX (303) 989-1327 <br />