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Page 2 of 3 <br /> Thanks, <br /> Michael Kith, REHS <br /> Lead Senior REHS <br /> San Joaquin County <br /> Environmental Health Department <br /> Phone: (209)468-3444 <br /> Fax: (209)468-8392 <br /> E-mail: mkith@sjcehd.com <br /> From: Robert McClellon [EH] <br /> Sent: Thursday, December 11, 2008 2:57 PM <br /> To: Michael Kith [EH] <br /> Subject: FW: Perimeter Migration Monitoring Plan at Foothill Sanitary Landfill <br /> From: Michael Carroll [mailto:mcarroll@sjgov.org] <br /> Sent: Thursday, December 11, 2008 10:30 AM <br /> To: Robert McClellon [EH] <br /> Cc: 'mwochnick@ciwmb.ca.gov' <br /> Subject: Perimeter Migration Monitoring Plan at Foothill Sanitary Landfill <br /> Robert, <br /> Thank you for forwarding David Otsubo's letter to you, and Michael Wochnick's <br /> memo to Christine Karl, regarding the Perimeter Migration Monitoring Plan at <br /> Foothill Sanitary Landfill. This plan incorporates existing monitoring well SG-12, <br /> which was installed in accordance with the regulations in force at that time and <br /> in conformance to the Final Closure Plan (approved in 1994). <br /> 1 spoke to Michael Wochnick today, and we discussed the most recent draft <br /> language of Title 27 Section 20921 . This language appears to exempt SG-12 <br /> from the depth requirement. I have inserted the proposed regulation provisions <br /> below for ease of reference. <br /> In our discussion, Michael emphasized that if data from the adjacent deeper <br /> monitoring wells indicate that off-site LFG migration might be occurring, then SG-12 <br /> would need to be "modified" (redrilled) to monitor the deeper depth. This seems a <br /> reasonable and prudent contingency. <br /> In light of this most recent regulation, I hope that CIWMB and EHD reviewers <br /> will reconsider the methane migration monitoring plan for Foothill Landfill. <br /> Best regards, <br /> Michael Carroll <br /> W. Michael Carroll, PE <br /> Senior Civil Engineer, Solid Waste Division <br /> 1810 E. Hazelton Ave. <br /> 1/8/2009 <br />