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8303 7216813 <br />MAY 29 '92 14:51 FRO~MGC <br />MAY 29 '92 11:12AM <br />To: Art Lsfler-BMG Enplawood <br />FROM: C11ff Shutt <br />DATE: May 13, 1ppZ <br />SUBJECT: RESULTS OP LOWER-PDNp NDMOOENEITV TESTINQ <br />• PAGE.002 <br />r.1iv <br />1. Results of Acculab 4nnlysea are attached. <br />2. Summary of San Luia and Acculab results are also ettachad top4thsr with <br />theft avsrapss and dsvietione. <br />3. Skyline LeDa analysed sample! 1A, 7A and 7A for copper only and determined <br />the concentration to be 136, 145, and 141 ppfi taapsetivaly. <br />4. Coneluaions <br />(a) Oiven the normal errors 1n aempling and analysis there sgema to Da <br />no doubt that the pond is perfectly homogeneous. So, I w uld think <br />that you could take a aemple from anywhere and be accura a within <br />6X. <br />(b) Obviously San Luis and Acculab reautts do no spree. Tha dliffarenee <br />in tpraamant fa great anouah to Cause concern, perticularl>f with the <br />WAD analyses. <br />(C) It is prasunsad that the copper analyses Of Acculab era oorrMct since <br />they spree With Skyline Whoia reputation 16 based ort fietat nalysea, <br />Since the ratio of copper to cyanide 1s approximately 1:1, and since <br />feW other matele ex14t in the pond, the presumption cen bs ads Lhat <br />the oyanide should consist of approximately 140 ppm f metal <br />bretkdown and whatever is proaant na frsr. <br />BEI belieras the amount of tree cyanide 1• negllpibl• and thus WAD <br />cYanlda should be approximately 130 to 150 ppm. Theor tieelly, <br />therefore, the WAD annlysis from Sen Luia is correct and hat from <br />Acculab is incorrect. <br />rtpv g9 'S2 10:06 PAGE.~OS <br />