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SGS ti k*rab Swr4A*ID: 07Zto22244"6 <br /> As Rsooirod <br /> Mobsh",Total 1105q 026 <br /> Trace Analysis Basis Cq 3 Acid DWsVICP-MS <br /> Armmony 2 ug(g 3 Acid DKmVICP-MS <br /> Baron 841 ug(g 3 Aad Digass`ICP-MS <br /> Bwykirn 22 ug(g 3 Acid DVnVICP-MS <br /> Cadman 8.6 uqg 3 Add DigesVFCP-MS <br /> Cobalt 12 4g 3 Add DOwVJCP-MS <br /> Chromium 25 ug(g 3 Aad DipsMP-MS <br /> Copper 142 ug(g 3 Acid DigesVlCP-MS <br /> Ld*" 10 ug'g 3 Add DigesMP-MS <br /> Manganese 539 ug(g 3 Aad DipWICP-MS <br /> MoMxWnum 4 ug(g 3 Aad DWM ICP-MS <br /> Nickel 9 40 3 Add DigesVlCP-MS <br /> Lod am ug<g 3 Aad DigesVlCP <br /> Sodium 0.45 % 3 Acid DgwVlCP <br /> Strontium 96 ugig 3 Aad DVPUICP-MS <br /> Thaliurn <2 ug(g 3 Acid DrgesVICP-MS <br /> Thaeum 6 ug(g 3 Add DigasOCP-MS <br /> Tin 2 ug(g 3 Add DigesVIGP-MS <br /> Vanadium 33 ug(g 3 Add DigesIMP-MS <br /> Zinc 1051 ug(g 3 Add Digestr-P-MS <br /> ZxccmiuM 50 ug(g 3 Add DigesMP-MS <br /> Calcivan 1.34 % 3 Acid DigesOCP <br /> Magnesium 0.65 % 3 Add DigesV CP <br /> Phosphorus 0.04 W. 3 Add DigesVICP <br /> None of the samples exhibited substantial potential to produce toxicity or acidity.As further confirmation <br /> of the geochemical characteristics of the material,the waste rock has been positioned above the London <br /> Water Tunnel for decades, and produces a neutral drainage around pH 7.8 containing zinc and other <br /> contaminants at non-toxic concentrations. The drainage from the South London Stockpile is not toxic, or <br /> acidic. Rather the flow of water entering the workings around the American Shaft is flow of water through <br /> portions of the underground mine that are primarily in the historic mine workings into the pyritic porphyry <br /> system,causing leaching of zinc to occur within the upper Mine workings. Removal of the waste from the <br /> American Mine parcel, and diversion of water away from the Shaft area,will reduce the flow of water to <br /> the Water Raise and reduce loading in the Water Tunnel. <br /> The rock contains heavy metals.Sorting test work using silver as a tie element for mass balance purposes <br /> demonstrates that the sorter will remove about 80%of the heavy metals, resulting in an inert waste <br /> product 11x lower in concentration than the removed ore product. <br /> Mineralogical inspection of the waste demonstrates removal of sulfides from the whole rock into the <br /> product,corroborated by gold/silver concentration ratio of about 11x into the product along with <br /> copper/lead/zinc. <br />