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~~~ 61 I Skyline Road - Laramie. WY 82070 - (307) 742-0031 <br />V V V V C ENGINEERING FAX (307) 721-2913 - E-mail: infolar(~wwcengineeriog.com <br />December 22, 2006 <br />~ECE9VED <br />CDPS Permit CO-0032638 JAN 0 2 2001 <br />Division of a ~ Safiety n <br />Mining <br />Mr. Byron Walker <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street <br />Room 215 <br />Denver, Colorado 80203-2273 <br />RE: Edna Mine, November 2006 CPDS <br />Dear Mr. Walker: <br />Enclosed are the Edna Mine's (Permit #CO-0032638) CPDS reporting results for the above <br />referenced monitoring period. During the month of November 2006, DMP 007 did not exceed <br />any compliance criteria. The initial analysis of DMP 004 exceeded the compliance criteria for <br />mercury during this monitoring period. Mercury exceeded the labs method detection limit by one <br />one-hundred thousandths per mg/L. ACZ Laboratories (ACZ) was contacted and the sample was <br />reanalyzed with anon-detect result which did not confirm the original value. The latter analysis <br />exceeded the method hold time. ACZ personnel noted that the practical quantitation limit is one <br />one-thousandth per mg/L therefore the detection limit and result are within the margin of error <br />for the method. The initial positive hit could have been due to contamination or carryover from <br />an earlier sample. DMP 004 results for the month of December have been received and mercury <br />did not exceed compliance criteria. For the above mentioned reasons DMP 004 did not exceed <br />any compliance criteria in November. <br />Should the Colorado Division of Reclamation, Mining and Safety have any comments or <br />concerns regarding this submittal, please contact me at your convenience. <br />Sincerely, <br />~.~ <br />FrrG <br />Beth Heesen, P.G. <br />Project Manager <br />TNS <br />Enclosures <br />File: 99-144 <br />