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-M4� <br /> 0jRAY SfLVER Mmxi <br /> 13. No commitment was made for monthly sampling, analysis and reporting as required by the <br /> Division's February 1, 2021 letter. Please commit to monthly sampling of at a minimum GW-4, <br /> SW-22 and GR-4R (once completed) until the problem can adequately be addressed. <br /> OSMI has continued visually contingent monitoring at SW-22 monthly, with no sheen observed. <br /> GW-4 was sampled for a broad range of organics and VOCs (Attachments 2,3,and 4), results <br /> found no regulated constituent concentrations above requirements in Regulation 41 The Basic <br /> Standards for Ground Water. GW-4R is withdrawn. OSMI proposes to plug and abandon GW-4 <br /> and cease visually contingent monitoring at SW-22. <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 /> Attachment 1: Environmental Sampling Map <br /> Attachment 2: Table 2 Update <br /> Attachment 3: Laboratory Reports for GW-4 and SW-22 <br /> Attachment 4: Field Notes for GW-4 and SW-22 Sampling <br /> Attachment 5:Geosyntec GW-4 Analytical Recommendations <br /> 5 Page <br />