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PQUI/y • <br />THOMAS M. GAU <br />DIRECTOR <br />c9CiFORN`P <br />FRITZ BUCHMAN <br />DEPUTY DIRECTOR <br />MICHAEL SELLING <br />DEPUTY DIRECTOR <br />ROGER JANES <br />BUSINESS ADMINISTRATOR <br />0 <br />P. O. BOX 1810 - 1810 E. HAZELTON AVENUE <br />STOCKTON, CALIFORNIA 95201 <br />(209) 468-3000 FAX (209) 468-2999 <br />www.sjgov.org/pubworks <br />7,7 <br />Warking for YOU FEB 19 2013 <br />ENVIFCNMENThLEEAU( -I <br />February 15, 2013 PE; MYTI r-FRVICI S <br />Mr. Robert McClellon, Program Coordinator <br />Environmental Health Department <br />1868 E Hazelton Avenue <br />Stockton, California 95205 <br />SUBJECT: FIRST QUARTER 2013 LANDFILL GAS MONITORING AT THE HARNEY LANE <br />SANITARY LANDFILL <br />Dear Mr. McClellon: <br />Enclosed, please find the results of the first quarter perimeter migration monitoring at the Harney Lane <br />Sanitary Landfill, completed on February 12, 2013. <br />We are pleased to report that combustible gas concentrations at all monitoring locations at the Harney <br />Lane Sanitary Landfill were below regulatory limits at the time of monitoring. Measurements were <br />taken with the newly improved monitoring probes. <br />All perimeter migration monitoring probes were below the regulatory limit of 5 percent. The highest <br />concentration (1.1 %) was found at probe GW -3 -Deep. We will continue to pay close attention to this <br />probe. <br />Two of these probes (GW -9 -Shallow and GW -12 -Shallow) were saturated, preventing sampling at this <br />time. This condition prevents offsite migration. At these wells, both the deep and intermediate probes <br />were free of combustible gas. <br />Structures were found to be free of combustible gas. <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 />WMC:kb <br />NAI Harney Lane\LFG Migration Monit\Repts 2013\1st Qtr\RMcCIe1Ion01-1stQ2013HL.doc <br />Enclosure <br />c: Kevin Taylor, California Department of Resources, Recycling, and Recovery <br />1001 "1" Street, Sacramento, California 95812-4025 <br />LA 11458A <br />