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PgU1N • <br />THOMAS R. FLINN <br />DIRECTOR <br />THOMAS M. GAU <br />CHIEF DEPUTY DIRECTOR <br />MANUEL SOLORIO <br />DEPUTY DIRECTOR <br />STEVEN WINKLER <br />DEPUTY DIRECTOR <br />ROGER JANES <br />BUSINESS ADMINISTRATOR <br />July 27, 2007 <br />Mr. Robert McClellon, Program Coordinator <br />Environmental Health Department <br />600 E. Main Street <br />Stockton, California 95202 <br />P. O. BOX 1810 - 1810 E. HAZELTON AVENUE <br />STOCKTON, CALIFORNIA 95201 <br />(209) 468-3000 FAX (209) 468-2999 <br />www.sjgov.org/pubworks <br />-- L <br />ENI✓if;+,,�i';Ir.f't' F <br />PER11111 .`VICES rH <br />SUBJECT: SECOND QUARTER 2007 PERIMETER AND STRUCTURE LFG <br />MONITORING, FOOTHILL SANITARY LANDFILL <br />Dear Mr. McClellon: <br />We are pleased to report that all but one monitoring well is in full compliance with Title 27 <br />regarding landfill gas migration at the Foothill Sanitary Landfill. All perimeter probes <br />except SG -4 were found to be below the 5 percent limit for combustible gas, and the on- <br />site structures were found free of combustible gas. <br />We are looking into several possible ways of preventing landfill gas migration in the area <br />of SG -4. <br />Attached are the Subsurface Landfill Gas Perimeter Monitoring Data, and the On -Site <br />Structure Gas Monitoring Data for this quarter. <br />If you have any questions, please call me at extension 8-8504. <br />Sincerely, <br />W. MICHAEL CARROLL, PE <br />Senior Civil Engineer <br />WMC:kb <br />NA1 Foothill\LFGperimMonit\2007\RMcClellonLFG-2ndQ07.doc <br />Attachments <br />c: Keith Kennedy, California Integrated Waste Management Board <br />1001 "1" Street, Sacramento, California 95812-4025 <br />LA 31209 <br />