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' 3.0 METHANE MONITORING AND RESULTS <br />A summary of the most recent and historical field analytical results is included in Table 1. Field gas <br />measurements from the monitoring points had methane concentrations ranging from 0.0 percent in monitoring <br />points B14, B17, B20, B26, B29, B30, and B35 to 93.0 percent in monitoring point B33. Carbon dioxide and <br />oxygen were also measured and their concentrations varied with the amount of methane. As methane in the <br />soils increases, it displaces oxygen and carbon dioxide, creating anerobic conditions that result in death of <br />vegetation and staining of the soils. Historical concentrations of methane, oxygen, and carbon dioxide in each <br />monitoring point are displayed on the monitoring point concentration diagrams located in Appendix B. <br />' Additional monitoring was undertaken at the former site of the Golden Eagle Mine in 2004, 2005 and 2006. <br />This monitoring consisted of the measurement of gas emanating from the former mine's south airshaft <br />location. At this location, a valve exists to access the shaft. The valve, when opened, exhibited positive <br />pressure. This flow was monitored for the presence of methane using a Lantec GA-90. The methane <br />concentration at this location was measured at 88.7 percent during the 2004 sampling event, 88.6 percent <br />during the 2005 sampling event and 91.9 percent during the 2006 sampling event. <br />Effected vegetation in the seepage area was also examined. Figure 3 shows the effected areas as delineated <br />during 2000, 2004, 2005 and 2006. The effected acreage was about 146 acres in 2000. The effected acreage <br />in 2005 was the same as in 2004, approximately 32 acres, and approximately 50.2 acres in 2006. <br />2006 Methane Monitoring Report (11.02.06).doc 3-1