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OPauiN C <br /> S' JOAQI THOMAS R.FLINN <br /> COUNTY OF <br /> DEPUTY DIRECTOR <br /> DEPARTMENT OF PUBLIC WORKS <br /> P.O. BOX 1810- 1810 E. HAZELTON AVENUE <br /> �4CiFOR°'�P STOCKTON,CALIFORNIA 95201 THOMAS M.GAU <br /> (209)468-3000 DEPUTY DIRECTOR <br /> MANUEL LOPEZ FAX(209) 468-2999 <br /> DIRECTOR <br /> STEVEN WINKLER <br /> DEPUTY DIRECTOR <br /> July 31, 2000 <br /> MEMORANDUM <br /> W 7- <br /> TO: Robert McClellon, Lead Senior R.E.H.S. <br /> Public Health Services <br /> Environmental Health Division <br /> FROM: Wes Johnson <br /> Associate Civil Engineer <br /> SUBJECT: LANDFILL GAS MONITORING AT FOOTHILL SANITARY LANDFILL <br /> On July 26, 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 Third 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\3rd2000.w0 <br /> Attachment <br /> c: Gino Yekta, California Integrated Waste Management Board <br /> LA 31209 <br />