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HENRY M. HIRATA <br />DIRECTOR <br />August 7, 1995 <br />ANIL <br />V 0 <br />COU N 1 I OF SAN J OAQU I N EUGENE DELUCCHI <br />DEPARTMENT OF PUBLIC WORKS CHIEF DEPUTY DIRECTOR <br />P. 0. BOX 1810 - 1810 E. HAZELTON AVENUE THOMAS R. FLINN <br />STOCKTON. CALIFORNIA 95201 DEPUTY DIRECTOR <br />(209) 468-3000 MANUEL LOPEZ <br />FAX (209) 468-2999 DEPUTY DIRECTOR <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 />GK: WJ:vj <br />R:IVIRGINIAJMEM0SJGASM0N.EP5 <br />Attachments <br />