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CCRA 5/t1 FR V1PVE3 <br /> Sodium Report 1.23 <br /> Thallium Report 0.00013 <br /> Uranium Report <0.0001 <br /> Vanadium 0.1 <0.0005 <br /> Zinc 5 <0.006 <br /> - TCLP uses extraction fluid with a pH of 2.88 and is not representative of meteoric water <br /> that would come in contact with the tailings. Mine wastes including mill tailings are <br /> exempt from RCRA regulations and therefore the TCLP results do not apply. That <br /> being said at the request of DRMS, OSMI analyzed its tailings using the TCLP <br /> method, the results of which are summarized below in Table 2. <br /> TCLP Limit Revenue Tailings <br /> ANALYTE (mg/L) (mg/L) <br /> Arsenic (TCLP) 5 0.07 <br /> Barium (TCLP) 100 _ 0.898 <br /> Cadmium (TCLP) 1 <0.008 <br /> Chromium (TCLP) 5 <0.02 } <br /> Lead (TCLP) 5 0.979 <br /> Mercury(TCLP) 0.2 <0.0002 <br /> Selenium (TCLP) 1 1 <0.05 <br /> Silver(TCLP) 5 <0.01 <br /> - Results of SPLP, TCLP, and ABA testing on tailings generated by the Revenue Mill <br /> are all well below any regulatory limits. A copy of the SPLP, TCLP, and ABA results <br /> from ACZ Laboratories in Steamboat Springs, CO is attached to this letter. <br /> OSMI appreciates your attention to this matter. If you have any questions, please contact me at <br /> (970) 325-9830. <br /> Sincerely, <br /> Poppy Staub <br /> VP Environment and Government Affairs <br /> Ouray Silver Mine Inc <br /> 311) J - c <br />