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TABLE 3 <br /> GAS PROBE MONITORING RESULTS <br /> (continued) <br /> (GW) Probe CH O Pressure <br /> S 0 20 -.01 <br /> 9 I 0 1 . 03 <br /> D 0 1 -.01 <br /> S 0 17 . 01 <br /> 10 I 18 0 . 08 <br /> D 30 0 . 13 <br /> S 27 0 . 01 <br /> 11 I 35 .5 . 18 <br /> D 35 1 .22 <br /> S 12 1 0 <br /> 12 I 50 0 .28 <br /> D 45 . 5 .3 <br /> S = Shallow Probe <br /> I = Intermediate Probe <br /> D = Deep Probe <br /> ON-SITE STRUCTURE MONITORING <br /> Date ppm Methane <br /> Scale House 6/25/92 50 <br /> Office Building 6/25/92 50 <br /> Scale House 8/11/92 60 <br /> Office Building 8/11/92 60 <br /> R®\VIRGINIA\GASMON.RPT <br /> 10 <br />