Original EA Amendment

MT MORGAN OPEN CUT PIT WATER QUALITY MODELLING stage 2 ● 26

Figure 4-1 Modelling predicted OCP pHs after added new tailings with a ranges of pH at the volume ratio 0.61: 1 (new tailings : OCP water)

Figure 4-2 Modelling predicted OCP pHs after added new tailings with a range of volume ratio.

4.2 COMPARISON OF MIXING MODEL OUTPUT WITH THE RESULTS OF LABORATORY TEST Table 4-7 presents the comparison between mixing model results with Heritage Minerals proposed parameters: pH 9.6 and the ratio of new tailings volume to volume of water from the OCP of 0.61:1 and laboratory test results of OCP water after being contacted with the new tailings.

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Heritage Minerals

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