6 Impact Minerals Ltd Annual Report 2023 Review of Operations continued Figure 4. Lake Hope showing the push tube sampling method used to drill out the resource and an example of the lake clay from the push tube. Figure 5. Particle size distribution analysis for four samples. Sample LP0040 contains sandy particles at the base of the deposit. DRILLING AND ASSAY RESULTS A total of 251 holes have been drilled by hand-held auger and push tube methods across the two lakes, with all samples submitted for assay at Intertek Laboratories in Perth (see ASX Releases March 21st 2023 and 19th June 2023 for further details). The drilling has defined a uniform and coherent layer of aluminium-bearing clay in both lakes that is up to 1.65 m thick. The assays mainly returned very high grades of aluminium oxide (alumina - Al2O3) of between 24.5% and 27.8% Al2O3 and, significantly, with low amounts of potential contaminants such as CaO (0.05% to 0.08%), Fe2O3 (2.4-3.2%), Na2O (2‑4%) and P2O5 (0.05-0.07%). High-grade assays with greater than 27% Al2O3 are presented in Table 1, and a complete set of assays and drill hole collar information are in the ASX announcements of March 21st 2023 and 19th June 2023. The distribution of aluminium in the lakes is shown in Figure 6. Table 1. Drill hole results with assays greater than 27% Al2O3. HOLE_ID MGA_E MGA_N METHOD Interval Al2O3 K2O Na2O CaO Fe2O3 MgO MnO SiO2 Cr2O3 P2O5 LOI LHP002 243134 6409163 PUSH 0.6 27.09 6.78 3.5 0.23 2.93 0.86 BDL 18.45 0.01 0.08 30.06 LHP004 243115 6409462 PUSH 0.6 27.53 7.1 3.46 0.08 2.86 0.81 BDL 17.13 0.008 0.08 29.25 LHP006 243380 6409461 PUSH 0.6 27.47 7.09 3.55 0.1 2.84 0.83 BDL 17.09 0.008 0.07 25.27 LHP007 243378 6409314 PUSH 0.6 27.23 5.54 3.47 0.13 2.99 0.78 BDL 17.98 0.009 0.07 31.15 LHP014 241247 6410105 PUSH 0.5 27.47 5.99 3.35 0.06 2.94 0.8 BDL 22.98 0.011 0.061 26.88 LHP015 241249 6410294 PUSH 0.5 27.71 5.99 3.48 0.06 2.88 0.84 BDL 22.38 0.01 0.059 29.27 LHP016 241253 6410504 PUSH 0.5 27.48 5.87 3.49 0.05 2.98 0.81 BDL 23.39 0.012 0.059 28.37 LHP019 241407 6410302 PUSH 0.5 27.29 7.44 3.35 0.06 2.71 0.74 BDL 15.84 0.008 0.068 33.4 LHP031 240900 6410450 PUSH 0.62 27.11 5.95 3.39 0.05 3.07 0.8 BDL 23.14 0.011 0.05 30.08 LHP038 241100 6410450 PUSH 0.6 27.42 5.91 3.24 0.05 3.25 0.79 BDL 23.16 0.011 0.058 30.75 LHP039 241100 6410550 PUSH 0.88 27.63 6.09 3.44 0.05 3.14 0.79 BDL 21.54 0.011 0.061 30.41 LHP040 241100 6410650 PUSH 0.85 27.16 5.91 3.46 0.05 3.2 0.78 BDL 23.1 0.013 0.061 30.85 LHP042 241300 6410400 PUSH 0.82 27.48 6.03 3.49 0.05 3.19 0.81 BDL 21.98 0.011 0.063 30.62 LHP045 241400 6410600 PUSH 0.82 27.66 5.9 3.56 0.05 3.29 0.83 BDL 22.37 0.012 0.062 29.55 LHP046 241400 6410700 PUSH 0.88 27.07 5.85 3.99 0.05 3.08 0.82 BDL 22.27 0.011 0.058 30.69 LHP049 241550 6410650 PUSH 0.88 26.98 5.78 3.73 0.06 3.14 0.83 BDL 23.34 0.012 0.06 30.19 LHP065 242700 6409300 AUGER 0.85 27.34 7.03 3.23 0.1 3.11 0.76 BDL 17.76 0.009 0.076 32.4 LHP068 242900 6409100 PUSH 0.78 27.02 7.16 3.37 0.16 3.13 0.8 BDL 17.11 0.009 0.072 32.7 LHP070 242900 6409300 AUGER 1 27.2 7.05 3.45 0.09 3.2 0.79 BDL 17.98 0.009 0.079 32.31 LHP083 242666 6409208 PUSH 0.4 27.04 6.96 3.26 0.16 3.02 0.78 BDL 18.69 0.009 0.074 31.24 LHP099 241400 6410300 AUGER 1.3 27.1 6.08 3.56 0.06 3.05 0.75 BDL 22.79 0.011 0.061 30.28
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