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Ouray Silver Mines, Inc. <br /> 1900 Main St. Unit 1 L� ; <br /> PO Box 564 �U17 <br /> Ouray,CO 81427 ni'vIISION OF <br /> h41NING PNU OURAY SILVER A/l/NE <br /> To: Colorado Division of Reclamation, Mining& Safety <br /> 1313 Sherman Street, Rm 215 <br /> Denver, CO 80203 <br /> From: Brian K. Briggs, P.E.,Chief Executive Officer <br /> Date: August 19, 2021 <br /> Subject: Q2 GW-3R Resampling results DRMS 112(d) Mining Permit# M2012-032 <br /> Dear Mr. West, <br /> Purewater Systems of Ridgway, Colorado performed second quarter groundwater sampling on June 17, <br /> 2021 at Ouray Silver Mine Inc.'s Revenue-Virginius under Division of mining reclamation and Safety <br /> 112(d)permit M2012-032. The results, received on July 14'h, 2021, reveal copper, lead and silver above <br /> groundwater standards in well GW-3R. <br /> Monitoring well GW-3R was resampled on July 20"', 2021 by Purewater Systems, with all constituents <br /> meeting groundwater standards(see attached report). It is believed that construction of the passive <br /> treatment system and cessation of groundwater infiltration have perturbed the groundwater table leading <br /> to temporary increases in some metals or that a sampling error occurred resulting in the original sample <br /> not being filtered. <br /> Please do not hesitate to call me with concerns or questions at 970-325-9830. <br /> Sincerely, <br /> Brian K. Briggs PE <br /> CEO,Ouray Silver Mines Inc. <br /> Attachments: <br /> ACZ Lab Report L67252 <br /> Phone: (970)325-9830 ♦ Fax: (970)325-9824 <br />