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• Tier Three: If the Tier Two analysis yields NMOC emissions greater than <br /> 50Mg/yr, landfill owners can either install a LFG emission control system or <br /> proceed with Tier Three analysis. The Tier Three analysis involves a pump test <br /> program using three or more extraction wells to derive a landfill specific LFG <br /> generation rate (k). <br /> LFG emission control system performance and design requirements are also addressed in <br /> the Rule. These design requirements include: <br /> • Design the collection systems to handle the maximum expected LFG flow from <br /> the entire area of the landfill that warrants control based on model results. <br /> • Collect LFG from each area in the landfill in which refuse has been placed for a <br /> period of 5 years or more for active sites. Implement LFG controls within 2 years <br /> on closed sites. <br /> • Collect LFG at a sufficient extraction rate. <br /> The above requirements can be meet with an active or passive collection system. After <br /> collection the rule requires that the LFG be treated by one of the following treatment <br /> systems with a minimum of 98 percent destructive efficiency of NMOC: <br /> • Open Flare. <br /> • Enclosed Combustion Unit (e.g. enclosed ground flare, gas turbines, engines, <br /> boilers). The Pacific Energy power generation facility currently in operation at <br /> the existing landfill would likely comply with this treatment requirement. <br /> • Processing LFG for subsequent sale or use. <br /> In addition to the above,the Rule contains the following record-keeping requirements: <br /> • Waste Volume Data <br /> • Calculated Maximum Flow Rate <br /> • Calculated Area of Influence <br /> • Well Head Pressures <br /> • Surficial Methane Monitoring <br /> • Flow Volumes <br /> WW-1811-CAl-AA/3110 Austin Road Landfill Expansion August 3,1995 <br /> ML1037.DOC Landfill Gas Generation and Emissions Page 3 <br />