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Landfill Gas Migration A. Status 1 Has an Air Quality Solid Waste Assessment Test(Air SWAT)been completed for the site? If yes,describe results.(YIN) No 2. Have surface or structure landfill gas monitoring surveys been conducted for the site? If yes,describe results.(YIN) Yes,conducted surface survey and structure survey on 6/9/99(see map). Both were non-detect. 3. Does the site have a landfill gas monitoring system? If yes,describe(Y/N) No 4. Does the site have a landfill gas control system? If yes,describe.(Y/N) No B. Migration 1 Do surface methane emissions exceed 500 ppm? (Y/N/LJ) No If unknown,conduct a field survey for presence of landfill gas. If no,based on field observations or measurements,age,and moisture content of the waste and the existing cover,are surface emissions>500 ppm likely to occur?. (Y/N) No,old bum dump. Surface survey results were non-detect. 2-4 feet of soil cover,which is compacted below the upper 6'of top sod. 2. Has>11.25%methane by volume accumulated in on-site structures? (YRW) , No If unknown,conduct a field structure survey for presence of landfill gas. If no,based on field measurements,the age and nature of the waste,land use,and cover condons,is landfill gas accumulation likely to occur in structures on or around the site? (YM)Reasons No,old bum dump. Gas monitoring in trenches were non-detect. 6/9/99 gas survey between fill and structures detected<500ppm. Office and most of the manufacturing building are on concrete stab. Existing structure survey was non-detect. 3. Do the methane concentrations exceed 5%at the site boundary? (YM) No If unknown,conduct perimeter field survey for landfill gas migration. If no,based on a perimeter field survey,age and moisture content of the waste,and the existing cover,is landfill gas migration likely to occur beyond the boundaries of the site?(YM)Reasons No,old bum dump. Gas monitoring in trenches were non-detect. 6/9/99 bar hole survey around Perimeter was<500 ppm.