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STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Department of Natural Resources 1313 Sherman St., Room 215 Denver, Colorado 80203 Phone: (303) 8663567 FAX: (303) 832-8106 COLORADO DIVISION O F MIN 6RALS GEOLOGY RECLANATION•NINING SAFETY•ECIEN CE Bill Owens Governor April 4, 2005 Ron Thompson Peak Project Management 34115 Co. Rd. 20.8 Trinidad Colorado 81082 RE: DMG Review of 2004 Soil Methane Report, #C-81-013 Dear Mr. Thompson: Russell George Executive Director Ronald W. Cottony Division DIreCLOr Natural Resource Trustee The Division of Minerals and Geology has completed a review of the 2004 Annual Report, Methane Assessment, Golden Eagle Mine Area, Weston Colorado, September 2004, submitted by Greystone Development Consultants. Two annual monitoring episodes (June 2003 and June 2004) have occurred since the Division reviewed the last monitoring report. Cumulative data is presented in the report since the monitoring began in 1999. Many of the soil monitoring sites show anomalously high methane values in 2003, including 64, 610, 811, 612, B14, 615, B22, B25, 631, B33, and B34. In 2004, excluding 64, values returned levels similar to previous measurements for these monitors. Monitoring in 2004 returned high methane values at B4, B5, 66, and B32. The remainder of the sites returned measured methane readings similar to values measured in 2002. At this time, it remains unclear as to why the values seem to vary from one year to the next. Some clustering of high values does seem to occur within one monitoring episode. Field observations and aerial photographs over the past two years indicate no noticeable change in vegetation die-out and no significant new growth has been observed. This concludes our review. If you have any questions, please tail me. Sin e ely, ~~~~ K t A. Gorham Environmental Protection Specialist II Office of Office of Mined Land Reclamation Active end Inactive Mines Colorado Geological Survey