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E.2 <br />HENRY M. HIRATA <br />DIRECTOR <br />1 0 0 <br />COUNTY OF SAN JOAQUIN <br />DEPARTMENT OF PUBLIC WORKS <br />P. O. BOX 1810 - 1810 E. HAZELTON AVENUE <br />STOCKTON, CALIFORNIA 95201 <br />(209) 468-3000 <br />FAX(209)468-2999 <br />EUGENE €7ELUCCHI <br />CHIEF DEPUTY DIRECTOR <br />THOMAS R. FLINN <br />DEPUTY DIRECTOR <br />MANUELLOPEZ <br />DEPUTY DIRECTOR <br />July 26, 1994 1 C raw E I <br />JUL1994 <br />ENVIRC)NM E M O R A N D U M KRMI1 / ERVICESLTN <br />TO: Ed Padilla, SREHS <br />Public Health Services <br />Environmental Health Division <br />FROM: Gabriel Karam, P.E. St1 <br />Senior Solid Waste Engineer <br />SUBJECT: LANDFILL GAS MONITORING AT THE NORTH COUNTY, <br />FOOTHILL, AND CORRAL HOLLOW SANITARY LANDFILLS <br />On July 21, 1994, Solid Waste Division staff monitored for landfill <br />gas migration in accordance with previously submitted monitoring <br />plans for the North County, Foothill, and Corral Hollow Sanitary <br />Landfills. The equipment used was a Gas Tech Landfill Monitor <br />equipped with parts per million (ppm), Lower Explosive Limit (5%), <br />and 100% gas scales. The 5% 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% methane mixture and was warmed up for <br />approximately 10 minutes prior to monitoring. <br />The results from the second monitoring event are shown on the <br />attached maps for each site. The readings for all holes are shown <br />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:�VIRGINIA�MEMOS�GASMON.EPI <br />Attachments <br />LA 63229 <br />LA 21303 <br />LA 31209 <br />