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t- <br />III IIIIIIIIIIIII III <br /> <br />BE/ <br />ENG/NEERS/CONSTRUCTORS /NC. <br />M E M O R A N D U M <br />T0: <br />~~: <br />FROM: <br />DATE: <br />SUBJECT <br />BMG - San Luis <br />AndrA Douchane - BMG <br />Dick Eaman - BEI <br />Grant Shelton - BEI <br />T.C. Shutt <br />April 16, 1992 <br />CHEMICAL ANALYTICAL MATRIX <br />Ob.iectives: <br />1. 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 />Colorado state requires daily data until <br />results. The report sheet, attached as <br />those tests required. <br />Exhibit E <br />R~CEIVE6 <br />I~PR 1992 <br />Mounta d Co. <br />further notice on one se~ of analytical <br />"Daily Log of Analytica Results," are <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 talon 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 cyanide, and Cu. <br />2. Third-Party Analyses <br />(a) For the foreseeable future we shall use 2, third-party lab 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-partyllabs by having <br />all of you analyze a previously certified "unknown" sampl~. Said sample <br />to be prepared by a lab known only to BEI. You will be notified as to <br />which is the "unknown." I <br />Irongate 4, Suite 200 • 777 South Wadsworth Blvd. • Lakewood, Colorado 80226 • Telephone (303) 989-4921 FAX (303) 989 i 327 <br />