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• WATER QUALITY SAMPLING PROTOCOL <br />Procedure <br />The current ground water sampling procedure used at the Keenesburg Mine <br />site was approved as part of the Coors Energy Company (CEC) Application <br />for Permit Renewal (1997). CEC has employed this procedure beginning <br />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 <br />changes to the previous ground water monitoring plan, pursuant to requests <br />from the Colorado Department of Public Health and Environment <br />(CDPHE). However, the field collection procedures, order of sampling, <br />field measurements, sampling frequencies, etc.; these protocols remain <br />essentially unchanged. CEC continues to perform ground water sampling <br />on a quarterly basis. <br />Severn-Trent Laboratories (Arvada, Colorado) performed all of the <br />laboratory analysis and prepared the quarterly sample results. [Note: The <br />• laboratory results pages displayed in this report are intended to represent <br />only a summary, and not the entire text of the laboratory work. A complete <br />copy of each quarterly report is available at the Keenesburg Mine office.] <br />Ground Water Monitoring and Quality Analysis <br />The formal ground water sampling program for the Keenesburg Mine was <br />initiated in 1992. Ground water quality information has been obtained from <br />monitor wells located: 1) upgradient, 2) within the disturbance area, and 3) <br />downgradient to the mine site. This monitoring program provides a basis <br />for comparison of information between a baseline and the existing site <br />conditions 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 <br />and from the analytical ground water quality reports, continue to suggest <br />that the overall groundwater quality in the area has not been adversely <br />• impacted by the earlier Keenesburg Coal Strip Mine operations, or by the <br />current reclamation activities (to include the ash disposal operation). Mine <br />AHR-2002 -47- <br />