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• testing. The samples were analyzed using the Toxicity Chazacteristic <br />Leaching Procedure (TCLP), and for radioactivity. Copies of the analysis <br />reports aze included in this section of the report. <br />The ash disposal reports, which detail the monthly disposal activities at the <br />Keenesburg Site, aze also found at the end of this section. <br />Mine Waste Rock Disposal <br />CEC has received approval from CDMG (Minor Revision #34), 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 <br />mine waste rock, from sites in the Clear Creek drainage near Idaho Springs, <br />was transported to the Keenesburg site. This material has been placed, in a <br />layer about four feet thick, between "lifts" of ash in the existing disposal pit <br />• (B-Pit). The specific intent of the method of mine waste rock placement, as <br />described in MR #34, is to minimize the possibility for any future <br />contamination. <br />No additional mine waste rock was received for disposal during the calendar <br />yeaz 2003. Thus the total quantity of this material at the site remains at <br />12,467 tons. The placement and horizontal extent of the mine waste rock <br />has been identified on the Existing Surface Features and Utilities Map (page <br />130). <br />U <br />AHR-2003 -86- <br />