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• �q4f� <br /> �pqu►H <br /> ' COUNTY OF SAN JOAQUIN <br /> THOMAS R. FLINN <br /> h � < DEPARTMENT OF PUBLIC WORKS DEPUTY DIRECTOR <br /> P.0.BOX 1810-1810 E.HAZELTON AVENUE MANUEL LOPEZ <br /> STOCKTON.CALIFORNIA 95201 DEPUTY DIRECTOR <br /> O �Q (209)468-3000 STEVEN WINKLER <br /> 4�►FORt� FAX(209)468-2999 DEPUTY DIRECTOR <br /> HENRY M. HIRATA <br /> DIRECTOR <br /> October 25, 1995 <br /> �o <br /> OCT 3 0 1995 <br /> ME M O R A N D U M ENVIRONMENTAL HEALTH <br /> — — — — — — — — — — PERMIT/SERVICES <br /> TO: Ed Padilla, SREHS <br /> Public Health Services <br /> Environmental Health Division <br /> FROM: Gabriel Karam G-k: <br /> Senior Solid Waste Engineer <br /> SUBJECT: LANDFILL GAS MONITORING AT THE NORTH <br /> COUNTY AND FOOTHILL SANITARY LANDFILLS <br /> On October 18, 1995, Solid Waste Division staff monitored for <br /> landfill gas migration in accordance with previously submitted <br /> monitoring plans for the North County and Foothill Sanitary <br /> Landfills. The equipment used was a Gas Tech Landfill Monitor <br /> equipped with parts per million (ppm) , Lower Explosive Limit (5 <br /> percent) , and 100 percent gas scales. The 5 percent gas scale <br /> did not detect any gas, so the ppm scale was used for monitoring. <br /> The instrument was calibrated with a 2 .5 percent methane mixture <br /> and was warmed up for approximately 10 minutes prior to <br /> monitoring. <br /> The results from the October monitoring event are shown on the <br /> attached maps for each site. The readings for all holes and <br /> structures are shown adjacent to their locations on the maps. <br /> If you have any questions, please call me at Extension 83066. <br /> GK:WJ:vj <br /> R:JVIRGINIAJMEM0S�GASMON.EP6 <br /> Attachments <br /> LA 63229 <br /> LA 31209 <br />