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COUNTY OF SAN JOA QUIN <br /> THOMAS R.FLINN <br /> .X DEPARTMENT OF PUBLIC WORKS DEPUTY DIRECTOR <br /> P.O.BOX IBIO-1810E.HAZELTONAVENUE STEVEN WINKLER <br /> STOCKTON,CALIFORNIA 95201-1810 DEPUTYDIRECTOR <br /> jib—' 209/468-3000 <br /> FAX:209/468-2999 <br /> MANUEL LOPEZ 57 <br /> DIRECTOR <br /> May 17, 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 WS <br /> Associate Civil Engineer <br /> SUBJECT: LANDFILL GAS MONITORING AT FOOTHILL SANITARY LANDFILL <br /> On May 12, 2000, Solid Waste Division staff monitored for landfill gas migration at the Foothill <br /> Sanitary Landfill. In accordance with a previous request from the Environmental Health Division, <br /> PVC pipes with caps were monitored for methane at four locations. The pipes are open at the <br /> 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 County staff prior to monitoring. Results from the Second Quarter <br /> 2000 Monitoring Event are shown on the attached map with readings for all probes and structures <br /> shown adjacent to their locations. <br /> If you have any questions, please call me at (209)468-3066. <br /> WJ:NZ:rh <br /> N:\Najee\Fh\Gas\2nd2000.wN <br /> Attachment <br /> c: Scott Walker, California Integrated Waste Management Board <br /> LA 31209 <br />