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Date: 9/30/96 <br /> Sampler: Dave Wan <br /> Gas Monitorm* Well Data <br /> Well Date %CH4 %02 Pressure <br /> In. of H O <br /> GWISHALL 9/30/96 48 20 0 <br /> GWIINTER 9/30/96 35 1 0.12 <br /> GWIDEEEP 9/30/96 0 2 0.03 <br /> GW2SHALL 9/30/96 55 3 0.02 <br /> GM LATER 9/30/96 60 1.2 0.06 <br /> GW2DEEEP 9/30/96 85 2 0.06 <br /> GW3SHALL 9/30/96 42 6 0.04 <br /> GW3INTER 9/30/96 40 1 0.06 <br /> GW3DEEEP 9/30/96 65 1 0.04 <br /> GW4SHALL 9/30/96 0 21 0.01 <br /> GW41NTER 9/30/96 0 21 -0.07 <br /> GW4DEEEP 9/30/96 0 21 -0.05 <br /> GW5SHALL 9/30/96 1.5 10 0 <br /> GW51NTER 9/30/96 0 21 0 <br /> GW5DEEEP 9/30/96 0 10 -0.11 <br /> GW6SHALL 9/30/96 0 11 -0.11 <br /> GW61NTER 9/30/96 6 20 -0.15 <br /> GW6DEEEP 9/30/96 12 1 -0.15 <br /> GWISHALL 9/30/96 0 19 0 <br /> GWIDEEEP 9/30/96 0 21 0 <br /> MONITORING RESULTS <br /> Landfill gas monitoring at the Corral Hollow Sanitary Landfill indicates that gas migration is <br /> occurring at several locations. The County has addressed this issue by installing final cover <br /> over the entire landfill. Final cover consists of a two foot foundation layer, a one foot clay <br /> barrier layer, and a one foot vegetative cover layer. Final cover will greatly reduce the <br /> amount of moisture entering the refuse, which in turn will reduce methane production. The <br /> County will continue gas testing on a quarterly basis to monitor the effects of final cover <br /> installation on gas migration. Effects of gas migration are expected to be minimal due to the <br /> desolate location of the Corral Hollow Sanitary Landfill. The only residence in the area is <br /> approximately one mile from the site. <br /> 4 <br />