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WATER QUALITY SAMPLING PROTOCOL <br />Procedure <br />The ground water sampling procedure used at the Keenesburg Mine site <br />during 2013 was originally approved as part of the Coors Energy Company <br />(CEC) Application for Permit Renewal (1997), filed with the then Colorado <br />Division of Minerals and Geology (CDMG). CEC has consistently used <br />this procedure beginning with the fourth quarter, 1997 sample collections. <br />Consent to dispose of Mine Waste Rock at the Keenesburg site (MR #34, <br />8/98) resulted in minor changes to the approved ground water monitoring <br />plan, pursuant to requests from the Colorado Department of Public Health <br />and Environment (CDPHE). However, field collection procedures, the <br />order of sampling, field measurements and sampling frequency protocols, <br />remain essentially unchanged since 1997. In 2013, CEC applied for and <br />was granted Technical Revision #44 which changed sampling frequency <br />from quarterly to semi - annually. Specifically, sampling was to occur in <br />April and September. As such, only 2 samples were collected and analyzed <br />in 2013. <br />Test America Laboratories, Arvada, Colorado, performed all of the 2013 <br />laboratory analyses and prepared the semi - annual sample results. Complete <br />copies of the semi - annual reports are included for reference and review. <br />The water monitoring analysis and process management expertise continues <br />to be provided by Doty and Associates, Golden, Colorado, as consultants. <br />Ground Water Monitoring and Ouality Analysis <br />The formal ground water sampling program for the Keenesburg Mine was <br />initiated in 1992. Ground water quality information has consistently been <br />obtained from monitor wells located: 1) upgradient, 2) within the <br />disturbance area, and 3) downgradient from the mine site. The monitoring <br />program provides a basis for comparison of information between a baseline <br />and the existing site conditions relative to ground water flow and water <br />quality at the site. <br />AHR -2013 5 <br />