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Attachment 1 Harney Lane Landfill - Project 939-01.09 Gas Monitoring Well Data GW-7S GW-71 GW-7D GW-8S GW-81 GW-8D GW-9S GW-91 GW-9D Date T Bar. CH4% 02% P CH4% 02% P CH4% 02% P CH4% 02% P CH4%1 02% P CH4% 02% P CH4% 02% 1 P CH4% 02% P CH4% 02% P Init. i 3/20/92 0 0.03 0 0.08 0 0.32 0 0 0 1 0.03 5 0.55 FLOODED 0 0.19 0 0.44 BGL 2/20/92 0 11 -0.17 5 0 0.13 7 0 -0.19 FLOODED 0 17.5 0.04 23 0 -0.27 NO ACCESS NO ACCESS NO ACCESS BGL 10/18/91 0 12 0.02 0 0 -0.1 T 1 0 -0.9 0 11 0.02 1 9 -0.05 10 1 0 -1.26 0 12 -0?02 3 2 -0.15 0 10 -1 APW 10/11/91 0 18 0.02 0 0 0.25 T 7 0.44 0 18 0.01 1.25 15 0.01 17 0 0.35 0 18 -0.01 T 17 -0.05 T 1 0.1 BGL Gas Monitoring Well Data GW-10S GW-101 GW-10D GW-11S GW-111 GW-11 D GW-12S GW-121 GW-12D 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 0 0.03 20 0.39 25 0.75 18 0.44 22 0.51 35 0.68 0 0.01 60 0.57 60 0.64 BGL 2/20/92 74 30.00 0 16 0 29 0 -0.05 41 0 -0.47 31 0 -0.21 50 0 -0.15 52 0 -0.37 0.25 13 0.02 67 0 -0.05 61 0 -0.16 BGL 10/18/91 0.75 11 0.01 2 11 -0.07 0 12 -1.05 0 18 0.02 50 0 -0.15 52 0 -0.52 0 15 0 0 14 -0.16 55 0 -0.45 APW 10/11/91 1.75 15 0.01 28 0 0.04 40 0 0.14 40 0 0.04 48 0 0.23 53 0 0.36 55 0 0.02 60 0 0.28 60 0 0.34 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) T= Trace concentrations; low level of methane is detectable but not quantifiable P = Probe pressure (inches static water column, gauge)