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Cotter Corporation Interim Measures <br />Page 2 of 2 <br />Boron, mgfl 0.75 Report <br />Y <br />Total Recoverable Chromium, u 11 16 <br />Potential) Dissolved Copper, u 1 5.4 7.7 <br />Potential! Dissolved Silver, ugtl 0.027 0.73 <br />Potential) Dissolved Zinc, u 71 71 <br />Weak Acid Dissociable snide u NA 5 <br />Fluoride, m NA 2 <br />Total Recoverable Thallium, ug/l OS NA , <br />3. Cotter shall report the results of the monitoring to the Division on the attached discharge <br />monitoring report form by August 28, 2010. The data shall be reported consistent with the <br />averaging period of each limit, and as indicated on the discharge monitoring report form. <br />4. Cotter's authorization to discharge from the temporary 50 gpm water treatment system shall <br />expire at midnight, August 1, 2010. <br />5. As outlined in paragraph 27 of the NOV/CDO, Cotter's submitted plan and time schedule, <br />including the alternate and additional terms and conditions outlined in this letter, constitute an <br />enforceable condition of the NOV/CDO. <br />6. The authorization to discharge and approval of the submitted plan and time schedule do not <br />relieve Cotter from complying with all other applicable Federal, State, and/or local flaws in the <br />implementation of its interim measures at the Schwartzwalder Mine. Cotter shall obtain all <br />other necessary approvals and/or permits to conduct the activities outlined in its submitted plan. <br />The Division makes no representation with respect to approvals and/or permits required by <br />Federal, State, or local laws other than those specifically referred to herein. <br />If you have any questions or concerns, please feel free to contact me at (303) 692-3598 or by <br />electronic mail at michael.hanis@state.co.us. <br />Sincerely, <br /> <br />Michael Harris <br />Enforcement Unit <br />WATER QUALITY CONTROL DIVISION <br />cc: Jerry Goad, Colorado Attorney General's Office <br />Charlotte Neitzel, Holme Roberts & Owen LLP <br />Randy Whicker, Cotter Corporation <br />Tony Waldron, DRMS