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Mr. Robert McClellon -2- <br /> HARNEY LANE SANITARY LANDFILL <br /> Combustible Gas Data Summary <br /> Select Migration Monitoring Wells <br /> Harney Lane Landfill <br /> PROBE Initial Levels Current Levels <br /> (%) (%) <br /> GWA S 16.3 0.0 <br /> GWA M 32.2 0.0 <br /> GW-11) 8.1 0.0 <br /> GW-2S 0.0 0.0 <br /> GW-2M 0.0 0.0 <br /> GW-2D 0.0 0.0 <br /> GW-3M 1.2 0.0 <br /> GW-31) 7.0 7.2 <br /> Notes <br /> (1)Initial levels are as of August 18,2004, unless otherwise indicated <br /> (2)Current Levels are as of October 1,2004,per SCS Field Service <br /> (3)Data from EHD,per letter of September 7, 2003 <br /> (4)Monitoring results at this well by EHD indicated concentrations above 9 percent <br /> 2: Additional Monitoring for LFG Mi ration <br /> Per your request, we have been monitoring the probes and the foundation vents of the adjacent <br /> structures weekly. Some of this data is included in the Table above. We continue to find the <br /> foundation vents of the adjacent migrant labor housing structures to be free of combustible gas. <br /> This data will be submitted with the next quarterly report, unless an earlier submittal is desired by <br /> the EHD. <br /> We will continue to monitor both these probes and those structures' foundation vents until the <br /> probes are found to be below the regulatory limit. <br /> 3: Remediation Plan for LFG Mi rg ation <br /> Your letter requests a remediation plan by October 7, 2004. The Plan is being compiled, and will be <br /> forwarded before the due date. Be assured that we have been executing this Plan since May 2004. <br /> It includes the requirement of more frequent monitoring, as directed. <br />