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Table 2 Gas Probe Monitoring Results 10/11/91 10/18/91 Probe# % Methane Pressure % Methane Pressure Maximum j & Lever (% LEL)2 (in. w.c.)3 % Oxygen (% LEL) (in.w.c.) °o Oxygen % Methane4 I I 1 S 20 0.02 12 18 0.01 15 20 l 22 0.06 13 42 -0.04 115 42 D 30 0.74 5 20 -0.36 14 30 2 S (0 LEL) 0 18 30 0.01 0 30 1 5 -0.24 1 7 -0.26 T 7 D 13 0.5 3 14 -2.43 2 14 3 S (T LEL) 0.03 17 (T LEL) 0.01 7 T LEL 1 5 0.15 15 20 -0.1 0 20 D T 0.5 0 23 -1.34 0 23 4 S 5 0.02 12 (30 LEL) 0.01 7 5 1 51 0.24 0 50 0.01 0 51 D 23 0.15 0 40 0.06 0 40 5 S (0 LEL) 0.01 18 37 0.01 0 37 1 25 0.1 4 30 -0.35 0 30 D 31 0.13 0 32 -0.45 0 32 6 S (0 LEL) 0.01 18 (0 LEL) 0.02 13 0 1 (0 LEL) 0.2 7 (0 LEL) -0.06 12 0 D 0 0.25 1 0 -0.4 1 0 7 S (0 LEL) 0.02 18 (0 LEL) 0.02 12 0 1 0 0.25 0 0 -0.1 0 0 D (T LEL) 0.44 7 T -0.9 0 T 8 S (0 LEL) 0.01 18 (0 LEL) 0.02 11 0 1 (25 LEL) 0.01 15 (20 LEL) -0.05 9 25 LEL D 17 0.35 0 10 -1.26 0 17 9 S (0 LEL) -0.01 18 (0 LEL) -0.02 12 0 1 (T LEL) -0.05 17 3 -0.15 2 3 D T 0.1 1 (0 LEL) -1.0 10 T 10S (35 LEL) 0.01 15 (15 LEL) 0.01 11 35 LEL 1 28 0.04 0 (40 LEL) -0.07 11 28 D 40 0.14 0 (0 LEL) -1.05 12 40 11 S 40 0.04 0 0 0.02 18 40 1 48 0.23 0 50 -0.15 0 50 D 53 0.36 0 52 -0.52 0 53 12S 55 0.02 0 (0 LEL) 0 15 55 1 60 0.28 0 (0 LEL) -0.16 14 60 D 60 0.34 0 55 -0.45 0 60 1. S=shallow probe,I=intermediate probe;D=deep probe 2. %LFL=percent of the lower explosive limit(LEL)concentration for methane(5 percent methane by volume in air) 3. in.w.c.=inches of static water column,gauge 4. Concentration presented is the maximum methane concentration measured during the two initial monitorings. The highest methane concentration in each gas well is shown in bold print ® 5. T=trace concentrations;low level of methane is detectable but not quantifiable. PJ9 9390109.GOW November 1, 1991