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41 GEM SERVICES <br /> Dawson Project—Tailings Characterization Page 9 <br /> sample. Siderite would have been captured in the total inorganic carbon analysis used to <br /> calculate carbonate neutralization potential. Since siderite does not contribute net neutralization <br /> capacity, the total inorganic carbon value for the altered tailings sample was adjusted downward <br /> to compensate. The calculation for this adjustment is shown in Table 3. <br /> A comparison of the bulk(ABA)neutralization potential to carbonate neutralization potential is <br /> shown in Figure 3. For the development rock samples,the bulk neutralization potential is from <br /> carbonates. The form of neutralization in the tailings samples is different. Carbonate <br /> neutralization is dominant in the altered tailings sample whereas aluminosilicate neutralization is <br /> the dominant form in the unaltered tailings sample. <br /> 60 0 <br /> m <br /> z • 1:1 <br /> d 30.0 <br /> m <br /> 1 <br /> 20.0 <br /> 10.0 <br /> 0 <br /> >l <br /> 0.0 <br /> 0.0 5.0 10.0 15.0 20.0 25.0 30.0 <br /> CO,-NP <br /> •Tailings •Development Rock <br /> Figure 3: ABA NP vs. Carbonate NP <br /> A material's potential to produce a net acidic drainage in the future is determined by the balance <br /> of acidity production potential and neutralization potential. This is plotted in Figure 4. <br /> Carbonate neutralization potential was used as it is the more effective component of the bulk <br /> neutralization potential. <br /> DDSldds Zephyr Dawson_Tallings ChareGedzation_FinaLReport,Feb.3,22,1:18 PM Feb 2022 <br />