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Marr Mine 2005 AHR -Responses <br />September 1, 2006 <br />4. `ICCC's electrical conductivity measurements field measurements appear to Ge in error <br />as they diverge significantly from laboratory analyses of dissolved solids. Please review this <br />situation internally and cromment on this apparent discrepancy". <br />Response: As noted in the AHR, the water quality meter evidently began failing a couple of <br />years ago although the reading did not appear to be anomalous until they were repeated over <br />time. The equipment has been replaced and more accurate readings are expelled in the 2006 <br />water year. <br />Please contact the undersigned or George Patterson (719-784-6395) with questions or <br />comments regarding this submittal or associated activities in support of this submittal. <br />Sincerely, <br />NWCC, INC. <br />i~°J ~~~ <br />Robert J. Peterson, CPG <br />Senior Engineer <br />Attachments <br />cc: G. Patterson, EFCI <br />R. Munson, EFCI <br />6371/2005 AHR responses NWCC InC. Paget <br />