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To:+13038328106 Page:2 of 7 2021-09-08 13:27:29 GMT 13032008630 From:Ben Langenfeld <br /> I �r <br /> tilt <br /> . <br /> Lewicki 8( Associates <br /> .� fNG:ivGERN f. .;E'OLtyF! I EfvVIRONMFN`.AL. <br /> 7, <br /> 17t, <br /> ' eptember 7, 2021 <br /> olorado Division of Reclamation,Mining, and Safety <br /> 313 Sherman St, Room 215 <br /> )enver, CO 80203 <br /> I livered Via Email <br /> E: Detroit City Mine;DRMS File No.M-2017-003-Waste Rock Sample <br /> olorado Calumet Co., Inc. has conducted a rock sampling and lab testing as it continues mining at <br /> e Detroit City Mine.This sample is in accordance with the currently approved permit The results <br /> f the whole rock analysis and acid-base accounting(ABA)are attached. <br /> �4 <br /> lease contact me if you have any further questions or concerns. <br /> gards, <br /> i . <br /> t <br /> n Langenfeld, P.E. <br /> wicki&Associates. PLLC <br /> b3)960-5613 <br /> j nl@lewicki.biz <br /> I e, <br /> 0 <br /> i }8 <br /> I <br /> f <br /> � 5 <br /> {{ f■^iris :'ii�:�'<i;�fi <br /> Lcw'icki&.4ssociatcs <br /> {ff �tj <br /> i . <br /> i1 ��efrt <br /> I d:r <br />