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Procedure <br />WATER QUALITY SAMPLING PROTOCOL <br />The ground water sampling procedure used at the Keenesburg Mine site during <br />2012 was originally approved as part of the Coors Energy Company (CEC) <br />Application for Permit Renewal (1997), filed with the then Colorado Division of <br />Minerals and Geology (CDMG). CEC has consistently used this procedure <br />beginning with the fourth quarter, 1997 sample collections. Consent to dispose of <br />Mine Waste Rock at the Keenesburg site (MR #34, 8/98) resulted in minor changes <br />to the approved ground water monitoring plan, pursuant to requests from the <br />Colorado Department of Public Health and Environment (CDPHE). However, field <br />collection procedures, the order of sampling, field measurements and sampling <br />frequency protocols, remain essentially unchanged since 1997. <br />Test America Laboratories, Arvada, Colorado, performed all of the 2012 laboratory <br />analyses and prepared the quarterly sample results. [Note: The laboratory results <br />displayed in this report (pages 48 to 59) represent only a summary of and are not <br />the entire text of the laboratory work. These summaries are now titled, "Detection <br />Summary" for all four quarters of 2012 (this is a laboratory protocol change). <br />Complete copies of each quarterly report are available in the files at the <br />Keenesburg Mine office.] The water monitoring analysis and process management <br />expertise continues to be provided by Doty and Associates, Golden, Colorado, as <br />consultants. <br />Ground Water Monitoring and Quality Analysis <br />The formal ground water sampling program for the Keenesburg Mine was initiated <br />in 1992. Ground water quality information has consistently been obtained from <br />monitor wells located: 1) upgradient, 2) within the disturbance area, and 3) <br />downgradient from the mine site. The monitoring program provides a basis for <br />comparison of information between a baseline and the existing site conditions <br />relative to ground water flow and water quality at the site. <br />The water quality test results, obtained from the data collected in the field and from <br />the analytical ground water quality reports, support the contention that the overall <br />groundwater quality in the area has not been adversely affected by; 1) the earlier <br />AHR -2012 -42- <br />