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Attachment 1 Harney Lane Landfill -Project 939-01.09 Gas Monitoring Well Data GW-1S GW-11 GW-1D GW-2S GW-21 GW-2D GW-3S GW-31 GW-3D Date T Bar. CH40/. 02% P CH4% 02% P CH4%102% P CH4% 02% 1 P CH4%1 02% P CH4% 02% P CH4% 02% P CH4% 02% P CH4% 02% P Init. 3/20/92 65 10 0.03 42 0.35 35 1.25 0 0.01 0 0.18 5 1.25 4 0.02 5 0.05 0 1.08 BGL 2/20/92 65 30.06 17 1.5 -0.42 51 0 -0.87 22 12.5 -1.59 0 13 0.03 7 0 -0.34 20 1 -1.39 27 0 -0.01 29 0 0.05 22 0 -1.11 BGL ' 10/18/91 75 30.20 18 15 0.01 42 1 T -0.04 20 14 1 -0.36 30 0 0.01 7 T -0.26 14 2 -2.43 T 1 7 0.01 20 0 1 -0.1 23 0 -1.34 APW 10/11/91 70 20 12 0.02 22 13 0.06 30 5 0.74 0 18 0 5 1 -0.24 13 3 0.5 T 17 0.03 5 15 0.15 T 0 0.5 BGL Gas Monitoring Well Data GW-4S GW-41 GW-4D GW-5S GW-51 GW-5D GW-6S GW-61 GW-6D Date T Bar. CH4% 02% P CH4% 02% P CH4% 02% P CH4% 02% P CH4% 02% P CH4% 02% P CH4% 02% P CH4% 02% P CH4% 02% P Init. 3/20/92 7 0.02 25 0.06 22 0.05 0 0.05 7 0.28 8 0.28 0 0.02 0 0.08 0 0.2 BGL 2/20/92 16 1 0.05 51 0 0.11 43 0 0.1 FLOODED 1 36 0 -0.28 0 15 -0.03 0 3 -0.09 0 0 -0.12 0 0 -0.12 BGL 10/18/91 1.5 7 0.01 50 0 0.01 40 0 0.06 37 0 0.01 30 0 -0.35 32 0 -0.45 1 0 13 1 0:02 0 1 12 -0.06 0 1 1 -0.4 APW 10/11/91 5 12 0.02 51 0 0.24 23 0 0.15 0 18 0.01 25 4 0.1 31 0 0.13 0 18 0.01 0 7 0.2 0 1 0.25 BGL Legend: T=Ambient temperature (degrees F) Bar. = Barometric pressure (inches Hg.) S = shallow probe (yellow); I = intermediate probe (red); D = deep probe (blue) ( ) = Percent of the lower explosive limit (LEL) concentration for methane (5% methane by volume in air) Tr=Trace concentrations; low level of methane is detectable but not quantifiable P = Probe pressure (inches static water column, gauge)