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z� ..OUNTY OF SAN JOAQ <br />414 <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 />HENRY M. HIRATA <br />DIRECTOR <br />May 8, 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, P.E. G-tr <br />Senior Solid Waste Engineer <br />1 og= ra a, a r--,2, I <br />M n v 19 7995 <br />EN PERHEALTH <br />MIT / SERVICES <br />SUBJECT: LANDFILL GAS MONITORING AT THE NORTH <br />COUNTY AND FOOTHILL SANITARY LANDFILLS <br />EUGENE DELUCCHI <br />CHIEF DEPUTY DIRECTOR <br />THOMAS R. FLINN <br />DEPUTY DIRECTOR <br />MANUELLOPEZ <br />DEPUTY DIRECTOR <br />On April 28, 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 />per cent), and 100 per cent gas scales. The 5 per cent 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 per cent methane mixture <br />and was warmed up for approximately 10 minutes prior to <br />monitoring. <br />The results from the April 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:JVIRGINIA�MEMOS1IGASMON.EP2 <br />Attachments <br />LA 63229 <br />LA 31209 <br />