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Summary of Ground Vibration Attenuation Studies for <br />Cripple Creek & Victor Gold Mining Company <br /> <br />Matheson mining Consultants, Inc. conducted seven Ground Motion Attenuation Studies between May <br />1997 and February 2004. Below is a summary of the studies. Each Study incorporated a statistically <br />valid data sample of test blasts and the Scaled Distance reported is to not exceed 0.50 inches per second <br />with a 95% probability. <br /> <br />Site Scaled Distance Date <br />AJAX Test Site 47.6 May 1997 <br />Ridge Road 34.0 May 1997 <br />Leach Pad Construction 13.4 October 1997 <br />North Cresson 43.8 February 2000 <br />East Cresson - A 34.1 February 2004 <br />East Cresson – B 32.4 February 2004 <br />East Cresson –C 31.4 February 2004 <br /> <br />The Leach Pad Construction test site data is not applicable to modeling production blasting. The AJAX <br />scaled distance has proven to be extremely conservative when measured against the on-going <br />monitoring program. The MLE-2 mining area is most closely associated with the North East Cresson test <br />area. <br /> <br /> <br /> <br />