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H. Provide ro4ee list of technical documents ite (Give date & <br /> Control System, I <br /> report, e.g.-SWAT, Design, o -n, afnrMonitoring Plans) <br /> -16)0" s;-/-, /,.-j <br /> i C- ' �'S' rie c.,f e,,-j <br /> AW &,,)A�L L2 1 411"U_12 <br /> 4c. 0-to ft GJ b 1-)ho . fQS 1 « 6' A -r Vkf, <br /> LANDFILL GAS MIGRATION <br /> A. Status <br /> 1. Has an Air Quality Solid Waste Assessment Test (Air Swat) <br /> been completed for the site? (Y/0) <br /> 2. Have surface or structure landfill as monitoring surveys <br /> been conducted for the site? (YO <br /> 2. Does the site have a landfill gas monitoring system? <br /> 3. Does the site have a landfill gas control system? (Y <br /> B. Migration <br /> 1 Do surface methane emissions exceed 500 ppm? <br /> (Y/N,@) <br /> If unknown, conduct a field survey for presence of landfill gas. <br /> If no, based on a field observations or measurements, age and moisture <br /> content of the waste and the existing cover, are surface emissions <br /> > 500 ppm likely to occur? (Y/N) <br /> 2. Has >1.250% methane by volume accumulated in on site <br /> structures? (Y/1`6) <br /> If unknown, conduct a field structure survey for presence of landfill gas. <br /> If no, based on field measurements, the age andnatur-s of the waste, <br /> land use and cover conditions, is landfill gas accumulation likely to occur <br /> in structures on cr around the site (Y/@ <br /> 3. Do th methane concentrations exceed 5% at the site boundary? <br /> (Y/N/4) <br /> If unknown, conduct perimeter field survey for landfill gas migration. <br /> If no, based on a perimeter field survey, age and moisture content of the <br /> waste, and the existing cover, is landfill migration likely to occur beyond <br /> the boundaries of the site? (Y/N) <br /> Page 2 of 4 <br /> CIWMB Closure and Remediation Branch (1/25/93) <br />