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Po��N <br /> Q" THOMAS R. FLINN P.O.BOX 1810-1810 E. HAZELTON AVENUE <br /> DIRECTOR ®'r' STOCKTON,CALIFORNIA 95201-3018 <br /> (209)468-3000 FAX(209)468-2999 <br /> c44FB"a''`p www.co.san-joaquin.ca.us <br /> THOMAS M.GAU <br /> DEPUTY DIRECTOR tp <br /> MANUEL SOLORIO � ,;'' Worldmg for YOU <br /> etc <br /> DEPUTY DIRECTOR i a <br /> STEVEN WINKLER } s rJ <br /> DEPUTY DIRECTOR j April 19,2005 ��c�,��='� C) <br /> 171 <br /> BENTON ANGOVE 7 c „ <br /> BUSINESS ADMINISTRATOR <br /> R <br /> Mr. Robert McClellon,Lead Senior R.E.H.S. <br /> » <br /> Environmental Health Department rte" <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, California 95202 <br /> SUBJECT: FIRST QUARTER 2005 LANDFILL GAS MONITORING AT THE <br /> HARNEY LANE 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(Table 1), including monitoring of the foundation vents of the migrant labor camp <br /> structures adjacent to the landfill(Table 2). We are pleased that combustible gas has not been detected in <br /> any foundation vents, indicating that LFG is not migrating to those structures. All migration monitoring <br /> probes,with exception of GW-3D and GW-3M, are below regulatory limits for combustible gas. SCS <br /> Field Services will continue to monitor the foundation vents weekly, along with the three soil gas <br /> monitoring wells adjacent to the migrant labor housing facility. <br /> We continue to aggressively collect LFG at a rate of approximately 410 scfm. <br /> The County drilled for a combination LFG extraction/soil gas well H-15 in the vicinity of GW-3 on <br /> February 25, 2005 (Figures 2 and 3). This well was completed in stages. On March 4, 2005, <br /> approximately 6"we vacuum was applied to the soil gas portion of this well (H-15A), and on <br /> March 8,2005 approximately 0.5"we vacuum was applied to the LFG extraction portion(H-15B). Data <br /> collected since the operation of this new well indicates decreasing combustible gas concentrations at <br /> GW-3, and we expect to be in compliance at GW-3 in the near future. <br /> If you have any questions,please contact me at extension 8-3066. <br /> Sincerely, <br /> ze— <br /> W. MICHAEL CARROLL, PE <br /> Senior Civil Engineer <br /> WMC:mr <br /> N:\1Hamey Lane\LFG Reports\lstQtr2005RptCoverLetter.doc <br /> Enclosure <br /> c: Mr. Gino Yekta <br /> California Integrated Waste Management Board <br /> Cal-EPA Building, 1001 1 Street <br /> Sacramento, California 958124025 <br /> LA 11458 <br />