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Rimrock Exploration & Development, Inc. <br />J-Bird Uranium Mine/ DMO/ EPP Geochemical Data and Analysis <br />The above three characteristics were reviewed for each sample analysis to determine the <br />acid generation potential of the material as follows; <br />• The 100ft. in Due South Vent (Sample B in Attachment C) demonstrates a <br />slightly basic pH (7.65), and sulfur that occurs predominantly in the sulfate form <br />(as opposed to sulfide). The slightly basic pH indicates that there is a minimal <br />amount of free acid (H+ ion) available, the sulfur as sulfate measure indicates that <br />there is minimal free sulfur for reactivity. Sulfur as sulfate is fully oxidized and <br />fairly stable as a complex. The formation of sulfuric acid requires the <br />consumption of `less-oxidized' and more available sulfur complexes such as those <br />found in iron pyrite and measured by available sulfide. Further review of the data <br />indicates that this sample does contain a low amount of buffering capacity as <br />measured by the alkalinity, bicarbonate and hardness measures (28.2 mg/L, 34 <br />mg/L and 31 mg/L). Alkalinity and bicarbonate measures provide an indication <br />of the amount of available C03 2- which is the most useful buffering capacity <br />complex typically associated with geologic formations. The results of the SPLP <br />analysis indicate that buffering capacity is `soluble' and available to abate free <br />acid. The combination of results indicates that the 100ft. in Due South Vent <br />sample would have a minimal acid generation potential. <br />The Ore Pile Sample Spot 5, 6" deep results are distinctly more `enriched' than <br />the 100ft in Due South Vent sample results. This is both beneficial (from the acid <br />generation analysis standpoint), and a detriment (from the radionuclide mobility <br />analysis standpoint). The Spot 5, 6" deep sample also has a slightly basic pH of <br />7.9. The Spot 5, 6" deep contains more moderate (or more soluble) amounts of <br />buffering complexes as measured by alkalinity, bicarbonate and hardness (44, 53 <br />and 38 mg/L respectively). Sulfur is present in the sulfate form. Sulfur as sulfide <br />was not detected. The balance of these characteristics indicates the J-Bird <br />materials do not have a strong propensity to form acid. In the case of the Snot 5, <br />6" deep, it appears this enriched surface deposition material does contain <br />buffering capacity complexes that could assist with the abatement of any acid <br />generation. <br />14.2 CONSTITUENT TOXICITY AND MOBILITY <br />Uranium mine sites are considered designated mine operations due to the presence of <br />uranium which can be toxic, and mobile within the environment. Uranium, like any other <br />natural element, can achieve excessive concentrations at which it can render toxic effects <br />to exposed organisms. Uranium is an element with radionuclide character meaning that <br />due to its complex atomic structure, it can degrade over time with the release of energy <br />22