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Date: 1/30/97 <br /> Sampler: Wes Johnson <br /> Gas Monitoring Well Data <br /> Well Date %CH4 %02 Pressure <br /> In. of H O <br /> GWISHALL 1/30/97 2 18 0 <br /> GW IINTER 1/30/97 35 ✓ 0 0.12 <br /> GWIDEEEP 1/30/97 65 3 0.03 <br /> GW2SHALL 1/30/97 85 ✓ 2 0.02 <br /> GW21NTER 1/30/97 50 ✓ 3 0.06 <br /> GW2DEEEP 1/30/97 70 2 0.06 <br /> GW3SHALL 1/30/97 10 12 0.04 <br /> GW31NTER 1/30/97 60 ✓ 2 0.06 <br /> GW3DEEEP 1/30/97 25 3 0.04 <br /> GW4SHALL 1/30/97 0 19 0.01 <br /> GW4INTER 1/30/97 0 18 -0.07 <br /> GW4DEEEP 1/30/97 0 18 -0.05 <br /> GW5SHALL 1/30/97 Flooded Flooded Flooded <br /> GW51NTER 1/30/97 Flooded Flooded Flooded <br /> GW5DEEEP 1/30/97 0 12 0 <br /> GW6SHALL 1/30/97 0 11 0.11 <br /> GW61NTER 1/30/97 5 20 0 <br /> GW6DEEEP 1/30/97 0 1 0.07 <br /> GWISHALL 1/30/97 0 19 0 <br /> GW7DEEEP 1/30/97 3 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 />