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p4 g•I IV <br /> THOMAS R. FLINN ° R O.BOX 1810-1810 E. HAZELTON AVENUE <br /> " .tt STOCKTON,CALIFORNIA 95201 <br /> DIRECTOR U� o (209)468-3000 FAX(209)468-2999 <br /> c°ciFoaN P , +' www.sjgov.org/pubworks <br /> THOMAS M.GAU <br /> CHIEF DEPUTY DIRECTOR <br /> MANUEL SOLORIO Wcrldng for YOU <br /> DEPUTY DIRECTOR <br /> STEVEN WINKLER <br /> DEPUTY DIRECTOR '�s� <br /> ROGER JANES <br /> June 28, 2007 <br /> BUSINESS ADMINISTRATOR4, <br /> Mr. Robert McClellon, Lead Senior R.E.H.S. <br /> Environmental Health Department <br /> 600 East Main Street <br /> Stockton, California 95202 <br /> SUBJECT: RESTORATION OF COMBUSTIBLE GAS MIGRATION COMPLIANCE <br /> HARNEY LNE SANITARY LANDFILL <br /> Dear Mr. McClellon: Q( <br /> We are pleased to report that the efforts of our contractor, SCS Field Services, have been <br /> successful in bringing the combustible gas concentration at the perimeter migration monitoring wells <br /> below regulatory limits (see below). The concentration of combustible gas at GW-1 was again <br /> monitored this week, and was again found to be in compliance. <br /> Methane <br /> Probe (% by Vol) <br /> GW-01D 0.0 <br /> GW-01M 0.0 <br /> GW-01S 0.0 <br /> GW-02D 0.0 <br /> GW-02M 0.0 <br /> GW-02S 0.0 <br /> GW-03D 0.3 <br /> GW-03M 0.0 <br /> GW-03S 0.0 <br /> Monitoring date: 06/19/2007 <br /> In accordance with our Remediation Plan for the Control of Landfill Gas Migration (May 25, 2007), <br /> we will discontinue monitoring the foundation vents of the migrant housing facility, and will monitor <br /> wells GW-1 through -3 monthly for the next three months. If subsurface combustible gas <br /> concentrations remain below regulatory limits, normal quarterly monitoring will be resumed. <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:sc <br /> N:\1Harney Lane\LFG Other\HeaderProbs 07\RMcClellon2-Compliance-sc.doc <br /> LA 11458 <br />