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BMRI -San Luis Pit Backfilh Sequential Batch Tests of Gneiss •
<br />Solids
<br />The head splits of each of the six Pink Gneiss samples were analyzed for the
<br />parameters listed in Table 1.
<br />Table 1: Waste Rock Characterization Parameters
<br />Total sulfur; Pyritic sulfur; Sulfate sulfur; acid generating
<br />potential; acid neutralizing potential; Ca, Mg, Na, K, AI, Sb,
<br />As, Be, Cd, Cr, Co, Cu, Fe, Pb, Mn, Hg, Ni, Se, Ag, Sr,
<br />Zn
<br />Liquids
<br />The site ground-water sample prior to testing ("head") and the branch-end samples C1
<br />and A3 from each test were analyzed for the full characterization parameter list, shown
<br />in Table 2.
<br />Table 2: Aqueous Phase -Full Characterization
<br />Dissolved oxygen; Eh; pH; Conductivity; TDS; Alkalinity;
<br />Ca, Mg, Na, K; HCO3, CO3, Cl, 504; Al, Sb, As, Be, Cd,
<br />Cr, Co, Cu, Fe, Pb, Mn, Hg, Ni, Se, Ag, Sr, Zn
<br />Extracts from all steps in each test were analyzed for the short-list parameters shown in
<br />Table 3.
<br />Table 3: Aqueous Phase -Short-List Characterization
<br />Dissolved oxygen; Eh; pH; Conductivity; TDS; Alkalinity;
<br />HCO3, CO3, SO4; As, Cd, Cu, Fe, Mn, Zn
<br />The detailed presentation of methods and procedures is given in Appendix A, Chemac's
<br />Final Report.
<br />Geochimica, Inc 3 95021/265e1r95
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