Laserfiche WebLink
r _ <br /> L PQUIry <br /> Q Z� THOMAS R. FLINN P.O.BOX 1810-1810 E.HAZELTON AVENUE <br /> " STOCKTON,CALIFORNIA 95201 <br /> DIRECTORAJ <br /> (209)468-3000 FAX(209)468-2999 <br /> www.sjgov.org/pubworks <br /> THOMAS M.GAU t y <br /> CHIEF DEPUTY DIRECTOR <br /> MANUEL SOLORIO <br /> DEPUTY DIRECTOR <br /> STEVEN WINKLER <br /> + <br /> DEPUTY DIRECTOR <br /> �ll <br /> ROGER JANES <br /> BUSINESS ADMINISTRATOR August 2, 2007 > <br /> Mr. Robert McClellon, Program Coordinator <br /> Environmental Health Department <br /> 600 E Main Street <br /> Stockton, California 95202 <br /> SUBJECT: SECOND QUARTER 2007 LANDFILL GAS MONITORING AT THE <br /> HARNEY LANE SANITARY LANDFILL <br /> Dear Mr. McClellon: 1 <br /> Enclosed, please finthe results of the second quarter perimeter migration monitoring event at the <br /> Harney Lane Sanitary Landfill, completed in April 12, 2007. <br /> We were pleased that combustible gas concentrations at all probe locations at the Harney Lane <br /> Sanitary Landfill were below regulatory limits(Table 1) at the time of monitoring. In addition, <br /> combustible gas was not detected in any foundation vents, indicating that LFG is not migrating to the <br /> migrant housing structures(Table 2). However, on May 4, 2007, staff of the Environmental Health <br /> Department found combustible gas in excess of 5%at monitoring probe G A-intermediate. The <br /> cause of this exceedence was the gradual settlement of the landfill and the landfill gas pipe <br /> supported on the landfill surface such that the pipe became obstructed with landfill gas condensate. <br /> As a result of this detection,we directed SCS Engineers to monitor the foundation vents of adjacent <br /> structures weekly for combustible gas to verify safe conditions. Combustible gas was not detected <br /> at any structure, indicating that human health and safety was not threatened. We also directed SCS <br /> to correct immediately the slope of the pipes. This effort was successful, bringing the methane <br /> content at M A-intermediate to below regulatory limits by June 21,which was confirmed and <br /> reported to Environmental Health Department on June 28, 2007. <br /> If you have any questions, please contact me at extension 8-8504. <br /> Sincerely, <br /> W. MICHAEL CARROLL, PE <br /> Senior Civil Engineer <br /> WC:kb <br /> N:\1 Hamey Lane\LFG Perim Monft\200rQndQtr07Rpt.doc <br /> Attachment <br /> c: Mr. Gino Yekta, California Integrated Waste Management Board <br /> Cal-EPA Building, 1001 1 Street <br /> Sacramento, California 95812-4025 <br /> LA 11458A <br />