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Mine Rock Analysis, Mayday Mine #1 <br />• 2.0 Analytical Results <br />2.1 Whole Rock Analysis <br />Whole Rock Analytical results are presented in Table 1 and analytical reports are appended to <br />this report. Major elements (reported as oxides) and trace elements (reported as elemental <br />values) comprise 96.9% of the sample. Within the Acid -Base Accounting (Table 2) CaCO3 is <br />reported as 6.2 %, of which 3.1% will be CaCO3 2 - , indicating that the majority of the volatile <br />component is 003 rather than H2O. <br />SiO2 and Al2O3 dominate the oxides, indicating that the sample is felsic in nature, with Ca and K <br />the dominate alkali and alkaline earth metals. Sulfur concentrations as determined by XRF <br />(1.10 %, Table 1) is similar to that determined by combustion (1.75 %, Table 2). Zinc was the <br />dominate trace metal (684 ppm). <br />2.2 Acid -Base Accounting <br />Acid -Base Accounting results are presented in Table 2 and analytical reports are appended to this <br />report. The pH of the mine rock was 7.5. The Neutralizing Potential (62.2 kg /ton) was greater <br />than the Acid Potential (54.6 kg /ton) producing a positive Acid -Base Potential (7.55 kg /ton). <br />2.3 Synthetic Precipitate Leachate Procedure <br />SPLP results are presented in Table 3 and analytical reports are appended to this report. <br />Analytical results were compared to both groundwater and surface water basic standards. For <br />surface water, the chronic standard was used as it was assumed that the leaching of any rock will <br />occur over long periods of time rather than an immediate release. Although the hardness value <br />of the mine rock, based on calculations using the calcium and magnesium concentrations was <br />greater than 400 mg/L as CaCO3, hardness based standards for several metals were based on a <br />hardness value of 50 mg/L as CaCO3 as this was the value of the potential receiving surface <br />waters including Little Deadwood Gulch and the La Plata River. <br />Based on these results, the only analyte above any of the Basic Standards was Arsenic (0.0151 <br />mg/L) which was 10% above the Domestic Water Supply — Human Health Standard (0.01 <br />mg/L). <br />3.0 Implication for Water Quality <br />A positive Acid -Base Potential indicates potentially acid - neutralizing material (Skousen et. al., <br />2002). Based on the results of the Acid -Base Accounting, a near neutral to alkaline solution with <br />sufficient carbonate to neutralize any acid produced during weathering. <br />Arsenic was the only metal greater than a Basic Standard. This metal was only slightly above <br />the Human Health Standard Domestic Water Supply. The analytical results were based on <br />leaching with a weak acid. Given that surface water draining from the catchment is near neutral <br />to alkaline (R Incorporated, 2010), any water coming in contact with the mine rock is predicted <br />to have less of a leaching effect, and a lower arsenic value. <br />• <br />June 24, 2010 R Incorporated <br />