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H. Provide reonce list of technical documents fcob site (Give date & <br /> report, e.g.-SWAT, Design, Control System, and Monitoring Plans) <br /> We,& Ou a 6 L4 S'C0,1 7- Pli,-D o s-a I c,,"a4 2, !790 <br /> C—=I d d 11 4C 6 <br /> 11. LANDFILL GAS MIGRATION <br /> A. Status <br /> 1 Has an Air Quality Solid Waste Assessment Test (Air-Swat) <br /> been completed for the site? DY N) 4- , Oki) <br /> f* <br /> 2. Have surface or structure land%!gas monitoring surveysf <br /> been conducted for the site? ((YtN) _e z <br /> 2. Pqes the site have a landfill gas monitoring system? <br /> V <br /> 3. Does the site have a landfill gas control system? (Y/j of <br /> + <br /> B Migration <br /> 1. Do surface methane emissions exceed 500 ppm? <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? (YIN) <br /> oN <br /> 2. Has >1.25% methane by volume accumulated in on site <br /> structures? <br /> If unknown, conduct a field structure survey for presence of landfill gas <br /> If no, based on field measurements, the age and nature of the waste, <br /> land use and cover conditions, is landfill gas accumulation likely to occur <br /> in structures on cr around the site( <br /> '6 <br /> 3. the methane concentrations exceed 5% at the site boundary? <br /> /U <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) eJ'A <br /> Page 2 of 4 <br /> ClWMB Closure and Remediation Branch (1/25/93) <br />