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Table 2 <br /> LFG System Evaluation <br /> Harney Lane Landfill <br /> LFG Collection Piping Evaluation <br /> Maximum Factor <br /> Pipe Actual Flow Design Flow of <br /> Pipe Application Size (in) Rate (cfm) Rate (cfm) Safety Note <br /> Well lateral with one well 3 20.5 60 2.9 1 <br /> Well lateral serving three wells 3 30.75 60 2.0 2 <br /> Header 6 155.8 375 2.4 3 <br /> Main header into flare station 8 410 800 2.0 <br /> Blower Evaluation <br /> Vacuum Available -60 in. we <br /> Vacuum Needed -14 in. we <br /> Factor of Safety 4.3 <br /> Flow Rate Available 1300 cfm <br /> Flow Rate Needed 410 cfm <br /> Factor of Safety 3.2 <br /> Base Data <br /> LFG system flow rate 410 cfm (as of November 2004) <br /> Number of LFG wells 80 <br /> Average flow rate per well 5.1 cfm <br /> Notes <br /> 1 The flow rate from an individual well is assumed to be four times the average well flow rate. <br /> 2 The combined flow rate from any three wells is assumed to be six times the average well flow rate. <br /> 3 The flow rate through a header is assumed to be proportional to the landfill area served by that header. <br /> Maximum area served by a single header is equivalent to one-half of the 85 acre Primary Site, or <br /> approximately 38%of the total landfill area (112 ac). <br /> in.we=inches water column pressure <br /> NAlHarney Lane\LFG Other\MitigPlan04\SystEvaI04.xis,PipeSelect Printed 11/19/2004 <br />