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oPau�N••c <br /> oG COUNTY OF SAN JAUI <br /> �'•' •Z THOMAS R. FLINN <br /> DEPARTMENT OF PUBLIC WORKS DEPUTY DIRECTOR <br /> •; .'® P.O.BOX 1810-1810 E.HAZELTON AVENUE MANUEL LOPEZ <br /> 'STOCKTON.CALIFORNIA 95201 DEPUTY DIRECTOR <br /> oq•., ��P (20i)1 4,68000 STEVEN WINKLER <br /> C�FOR FAX(209)46$ q$", DEPUTY DIRECTOR <br /> HENRY M.HIRATA <br /> DIRECTOR <br /> January 26, 2000 <br /> MEMORANDUM <br /> TO: Robert McClellon, Lead Senior R.E.H.S. <br /> Public Health Services <br /> Environmental Health Division <br /> FROM: Wes Johnson -•Z <br /> Associate Civil Engineer <br /> SUBJECT: LANDFILL GAS MONITORING AT FOOTHILL SANITARY LANDFILL <br /> On January 12, 2000, Solid Waste Division staff monitored for landfill gas migration at the <br /> Foothill Sanitary Landfill. In accordance with a previous request from the Environmental Health <br /> Division, PVC pipes with caps were monitored for methane at four locations. The pipes are open <br /> at the bottom and are approximately 2.5 feet deep. <br /> The County used a Landtec GEM 500 Gas Extraction Monitor to perform the monitoring. The <br /> instrument was calibrated by the manufacturer prior to monitoring. Results from the First <br /> Quarter 2000 Monitoring Event are shown on the attached map with readings for all probes and <br /> structures shown adjacent to their locations. <br /> If you have any questions, please call me at(209) 468-3066. <br /> WJ:MK:cg <br /> N:\WES\EH\GAS\1 st2000.wpd <br /> Attachment <br /> c: Scott Walker, California Integrated Waste Management Board <br /> LA 31209 <br />