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5 <br /> The anaerobic fermentation of BTEX converts carbon dioxide into dissolved methane. <br /> Figure 4 shows significantly elevated dissolved methane levels in the zone of significant <br /> contamination(i.e., MW-DIS-2). The methane concentration in MW-DIS-8S increased from <br /> 1.2 gg/L last quarter to 6.8 gg/L this quarter.Other monitoring wells show little or no <br /> change from the previous quarter. <br /> 1 The next quarterly 1996 monitoring event is scheduled for mid August <br /> i <br /> I <br /> SFOIC:IPROJECTMELMONTEN098\001_DOC <br />