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i1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />A 5 C I <br />3. ANALYSES AND DATABASE <br />Four samples were subject to specific chemical analysis: <br />" sample 1: from the tailings system prior to treatment with Cytox, (for <br />removal of "free" cyanide); <br />" sample 2: at the discharge spigot at tailings impoundment, after Cytox <br />treatment; <br />" sample 3: the tailings supernatant on the lower pond; and <br />• sample 4: the water from the collection pond. <br />All samples were analyses for the following parameters: <br />• total cyanide (TCNI: (Laboratory "A" -EPA Method 335.3, Autoanalyzer, <br />(Laboratory "C" -EPA Method 335.2, Marnual) <br />" weak acid dissociable cyanide (WAD CN-: (APHA/AWWA Standard Methods, <br />17th Edition, method 4500-C); <br />• "free" cyanide: (Laboratory "C" colourimetric method (pyritic/barbituric acid) <br />and Laboratory "A" ion chromatography); <br />• chromium, cobalt, copper, iron, manganese, nickel and zinc; (ICP scan - <br />Method 200.7/6010 (1,2)); <br />" mercury: (Cold Vapour Atomic Absorption; Method 245.1 (1 )) <br />In addition, Laboratory "C" analyzed the samples for thiocyanate to establish the <br />potential for intereference in the cyanide determinations. <br />The results of the analyses from both laboratories have been summarized in a single <br />table, Table 1, for the convenience of the reader. (Original analytical data sheets are <br />included in Appendices A and B for review). <br />3 <br />