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z �,y COUNTY OF SAN JOAQUIN <br /> EUGENE DELUCCHI <br /> DEPARTMENT OF PUBLIC WORKS CHIEF DEPUTY DIRECTOR <br /> P.O.BOX 1810—1810 E.HAZELTON AVENUE THOMAS R.FLINN <br /> STOCKTON.CALIFORNIA 95201 DEPUTY DIRECTOR <br /> �gGep0R � (209)468-3000 MANUEL LOPEZ <br /> FAX(209)468-2999 DEPUTY DIRECTOR <br /> HENRY M.HIRATA <br /> DIRECTOR <br /> August 7, 1995 <br /> M E M O R A N D U M <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 RECYCLING CENTER AND SANITARY <br /> LANDFILL AND FOOTHILL SANITARY LANDFILL <br /> On July 31, 1995, Solid Waste Division staff monitored for <br /> landfill gas migration in accordance with previously submitted <br /> monitoring plans for the North County Recycling Center and <br /> Sanitary Landfill and Foothill Sanitary Landfill . The equipment <br /> used was a Gas Tech Landfill Monitor equipped with parts per <br /> million (ppm) , Lower Explosive Limit (5 percent) , and 100 percent <br /> gas scales. The 5 percent gas scale did not detect any gas, so <br /> the ppm scale was used for monitoring. The instrument was <br /> calibrated with a 2 .5 percent methane mixture and was warmed up <br /> for approximately ten minutes prior to monitoring. <br /> The results from the July 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 /> GIC:WJ:vj <br /> R:`VIRGINIA I MEMOS I GASMON.EP5 <br /> Attachments <br /> LA 63229 <br /> LA 31209 <br />