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H. Provide re )nce list of technical documents f( a site (Give date & <br />report, e.g.-SWAT, Design, Control System, and Monitoring Plans) <br />/-),o <br />II. 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/N) <br />2. Have surface or structure landfill gas monitoring surveys <br />been conducted for the site? (Y/N) <br />2. Does the site have a landfill gas monitoring system? <br />(Y/N) _ ,2 <br />3. Does the site have a landfill gas control system? (Y/N)_ JU— <br />B. Migration <br />i. Do surface methane emissions exceed 500 ppm? <br />(Y/N/U)1_ <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 >1.25% methane by volume accumulated in on site <br />structures? (Y/N/U) <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 •Naste, <br />land use and cover conditions, is landfill gas accumulation likely to occur <br />in structures on cr around the site (Y/N) <br />3. Do the methane concentrations exceed 5% at the site boundary? <br />(Y/N/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) <br />Page 2 of 1 <br />CIWMB Closure and Remediation Branch (1/25/93) <br />