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The seven wells were monitored for methane on July 7, 1998. The results of the monitoring are <br /> shown on the table below. The County used the Landtec GEM 500 gas monitoring instrument. <br /> This instrument was calibrated according to manufacturer's specifications. The GEM 500 is <br /> capable of measuring static pressure, methane, carbon dioxide, oxygen, and balance <br /> concentrations. <br /> Date: 7/7/98 <br /> Sampler: Jared Pechan <br /> Code Time Date CH4 % CO2% 02 % Bal% Pressure <br /> In. of Water <br /> CHWELMI S 08:39 07/07/98 0.7 1 19.7 78.6 0 <br /> CHWELMII 08:36 07/07/98 31.2 33.5 0 35.3 0 <br /> CHWELMID 08:30 07/07/98 52 37.6 0.4 10 0 <br /> CHWELM2S 08:30 07/07/98 52 37.6 0.4 10 0 <br /> CHWELM2I 08:20 07/07/98 58.7 39.5 0.7 1.1 0 <br /> CHWELM2D 09:53 07/07/98 49 35.9 0 15.1 0 <br /> CHWELM3 S 09:53 07/07/98 49 35.9 0 15.1 0 <br /> CHWELM3I 09:51 07/07/98 45.4 36.5 0.2 17.9 0 <br /> CHWELM31) 09:48 07/07/98 38.4 33.9 0.5 27.2 0 <br /> CHWELM4S 09:39 07/07/98 0.2 0.1 19 80.7 0 <br /> CHWELM4I 09:37 07/07/98 0.2 0.1 18.1 81.6 -0.2 <br /> CHWELM413 09:34 07/07/98 0.2 0.1 20 79.7 0 <br /> CHWELMSS 09:26 07/07/98 0.2 5.1 12.8 78.9 0 <br /> CHWELM51 09:23 07/07/98 1.3 12.1 2.1 84.5 -0.1 <br /> CHWELMSD 09:20 07/07/98 13.8 12.6 0 73.6 -0.2 <br /> CHWELM6S 09:12 07/07/98 0.5 10.9 0.7 87.9 -0.1 <br /> CHWELM6I 09:09 07/07/98 29.6 27.8 0 42.6 -0.3 <br /> CHWELM613 09:05 07/07/98 50.2 46.6 0 3.2 -0.4 <br /> CHWELM7S 08:55 07/07/98 0.3 1.7 19.2 78.8 0 <br /> CHWELMID 08:52 07/07/98 0.3 0.4 20.3 79 0 <br /> 4 <br />