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1 <br />~< A 5 C I <br />' REPORT ON EVALUATION OF CYANIDE CHEMISTRY IN TAILINGS SAMPLES: <br />SAN LUIS PROJECT, MAY 1992 <br />1 <br />1. PREAMBLE <br />~' At the request of Battle Mountain Resources Company (BMRC1, ASCI has <br />' undertaken a review of water quality, but specifically the cyanide data, from a series <br />of four samples collected on May 1 1 , 1992 at various points in the tailings system <br />at the San Luis Project in Colorado. In particular, ASCI has focussed tlhe review on: <br />" evaluating the accuracy or otherwise of the cyanide analyses, particularly <br />"free" and WAD cyanide analyses in this data set; <br />' establishing the cyanide chemistry of the tailings system, as of May 1 1 , <br />1992; and <br />" evaluating the performance of the Cytox process which is used to remove <br />' "free" cyanide from the tailings stream. <br />It is important to note that this evaluation and the comments made on cyanide <br />' analysis apply specifically to the data set being considered here and are not <br />necessity applicable elsewhere. <br />1 <br /> <br />'J <br /> <br /> <br />~1 <br />1 <br />1 <br />