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Page 1 of 1 1 <br /> iv <br /> Garrett T. Backus [EH] <br /> From: Garrett T. Backus [EH] <br /> Sent: Tuesday, May 15, 2007 8:56 AM <br /> To: 'Michael Carroll' <br /> Cc: Robert McClellon [EH] <br /> Subject: Harney Lane Landfill -detection of LFG > 5% at GW-1 <br /> Hi Mike, <br /> As we have discussed, I detected methane at 7.4% in the middle probe of GW-1, on May 4, next to the migrant <br /> housing. The EHD requires that a remediation plan be prepared and submitted to our department. The <br /> remediation plan should be similar to the plan dated December 14, 2004. The plan should include mitigation <br /> steps, additional monitoring, reporting of all monitoring, and LFG system evaluation. <br /> GW-1 and the foundation vents of the structures adjacent to this well should be monitored weekly until the <br /> concentration of methane is brought below regulatory limits. <br /> Garrett Backus, REHS <br /> San Joaquin County Environmental Health Department <br /> 304 E Weber Ave, 3rd floor <br /> Stockton, CA 95202 <br /> telephone: (209)468-2986 <br /> fax: (209)468-8392 <br /> email: gbackus@sjcehd.com <br /> 5/15/2007 <br />