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OGCC <br />R i o G r and a <br />Mr. Berhan Keffelew <br />Hydrogeologist <br />Division of Reclamation, Mining, and Safety <br />1313 Sherman Street <br />Room 215 <br />Denver, CO 80203 <br />Re: 1st Half, 2010 Groundwater Monitoring Report <br />Dear Mr. Keffelew, <br />July 1, 2010 <br />"9CEIVED <br />JUL 02 2010 <br />Division of Reclamation, <br />Mining & Safety <br />Enclosed with this letter are two copies of GCC Rio Grande Inc.'s (GCC) First Half 2010 Semi- <br />Annual Groundwater Monitoring Report. Groundwater sampling and analysis was conducted on <br />Apri130, 2010. Because of the length of time required for the radioactivity analyses of the <br />samples GCC did not receive the reports until last week. <br />The following monitoring wells located at GCC's facility in Pueblo, Colorado were sampled: <br />• MW-002 <br />• MW-003 <br />• MW-004 <br />Please note that samples were not collected from deep well MW-OOIA and shallow well MW-the 005. Both of these wells were determined be <br />dry in previous measured nth se wells, events. <br />and the usougce of <br />April 30, 2010 sampling event very little water was <br />this water was determined to be formation condensation. <br />If you have questions or concerns regarding this information, please don't hesitate to contact me. <br />Sincerely, <br />Barbara T. Hodgson <br />Environmental Manager <br />(719) 647-6829 <br />bhodgson@gcc.com <br />-- <br />US Postal Service Delivery ConfirmationT"" Label Number: 9405503699300278978484 <br />A company of: <br />GCC Rio Grande Pueblo Plant OGCC <br />P.O. Box 8328 <br />Pueblo, CO 81004