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and bottom ash) are obtained from the SUEZ power plant and submitted to a <br />local lab for testing. These samples are analyzed using the Toxicity <br />Characteristic Leaching Procedure (TCLP), and for radioactivity. Copies of <br />the analysis results are included in this Section of the AHR Report. Ash <br />disposal reports, detailing the monthly transportation and disposal activities <br />at the Keenesburg site, can also be found in this Section. <br />Mine Waste Rock Disposal <br />CEC obtained approvals from CDMG (Minor Revision #34), from CDPHE <br />and from Weld County, to dispose of certain mine waste rock at the <br />Keenesburg Mine site. During 1998 and 1999 a total of 12,467 tons of mine <br />waste rock, obtained from reclamation locations in the Clear Creek drainage <br />near Idaho Springs, Colorado, were transported to the Keenesburg site. This <br />material was placed, in a layer approximately four feet thick, between "lifts" <br />of ash in the existing disposal pit (B-Pit). The specific intent of this method <br />of mine waste rock placement, as described in MR #34, was to isolate and <br />minimize the possibility for any future contamination from this material. <br />No additional mine waste rock was received for disposal during the calendar <br />year 2008. The total quantity of this material placed at the site remains at <br />12,467 tons. The location and horizontal extent of the mine waste rock has <br />been identified on the Existing Surface Features and Utilities Map (page 87). <br /> <br />AHR-2008 -45-