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aF'F, lE '9c' 11~31HM <br /> <br />~~~ <br />ENQINEEAS/CONSTRUCTORS /NC. <br />M E M O R A N D U M <br />T0: <br />CC: <br />FROM: <br />DATE: <br />SUBJECT: <br />BMG - San Luis <br />Antlrb DOUChane - BMG <br />DicK Eamon - BEd <br />Grant Shelton - BEI <br />T.C. Shutt T~ <br />April 18, 1992 <br />CHEMICAL ANALYTICAL MATRI% <br />Obiectives: <br />1. Reduce Free-CN as quickly as possible <br />2. Confirm (1) by analysis <br />3. Determine BCCUracy of analytical data <br />Test i na Stem <br />i. BMG - San Luis Analyses <br /> <br />P. <br />Colorado state requires daily data until further notice an 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 nc~„Y1 for samples taken n Monday and <br />Wednesday (more about this later in the memo). A11 samples take on th® other <br />working days should be analyzed only for (CN)'. <br />In addition to the daily analyses for (CN)• you should take a same a ante a week <br />from the collector pond and analyze for total cyanide, wAD cyani e, 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 oP writing we have accepted Acculab nd Analytica, <br />and eliminated Haxen, Hauser, Skyline and Barringer. <br />(b) We shalt "check-test" the accuracy of BMG and third-party abs 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. Ycu will be tified as to <br />which is the "unknown." <br />Irongate 4. Suds 200.777 South Wadsworth 91vd. • Lakewood. Caloratlo 80226 • Telephone (303) 989.4g2t . f~Ax (303) 989.1327 <br />