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May 29, 2007 <br />i <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 />Mr. Todd Del Frate t 2007 <br />California Regional Water Quality Control Board ENVIR? A V"EAT HEALTH <br />Central Valley Region PEPPo,'iT/� RVICES <br />11020 Sun Center Drive, #200 <br />Rancho Cordova, California 95670-6114 <br />SUBJECT: REVISED COST ESTIMATES FOR CORRECTIVE ACTION AT THE <br />CORRAL HOLLOW AND HARNEY LANE SANITARY LANDFILLS <br />Dear Mr. Del Frate: vo <br />Q, <br />Enclosed please find revised cost estimate for corrective action at the Corral Hollow and Harney <br />Lane Sanitary landfills (prepared in association with Shaw Environmental and Infrastructure, Inc), <br />revised per your letter of January 9, 2007. At both landfills our assessment is that the likely <br />foreseeable scenario requiring corrective action is impact to groundwater by landfill gas. <br />Therefore, the proposed remediation scenarios, for the purpose of financial assurance, are <br />implementation of additional landfill gas control. The revisions include the cost for delineating a <br />contaminant plume and the infrastructure to support additional landfill gas wells. <br />Please review the enclosed estimates, and if you find them reasonable, we would greatly <br />appreciate a letter stating this for our transmittal to the California Integrated Waste Management <br />Board (CIWMB). In the past, CIWMB staff has required a letter from Regional Water Quality <br />Control Board staff stating whether estimated costs appear reasonable. Concurrence with the <br />magnitude of the estimate will also allow us to evaluate our options for financial assurance. <br />Please contact me at (209) 468-8504 with any questions. <br />Sincerely, <br />czlaz( <br />W. MICHAEL CARROLL, PE <br />Senior Civil Engineer <br />WMC:kb <br />N:\ Miseellaneous\ClosCostEst\FinAssur&Costs\TDelFrate02-RevCorrActCostEst.doc <br />Enclosures <br />c: Robert McClellon, Environmental Health Department <br />LA 1103C, LA 21125 <br />• <br />��0'gVIN C <br />5 THOMAS R. FLINN <br />DIRECTOR <br />C4�IFp PN`P <br />THOMAS M. GAU <br />CHIEF DEPUTY DIRECTOR <br />MANUEL SOLORIO <br />DEPUTY DIRECTOR <br />STEVEN WINKLER <br />DEPUTY DIRECTOR <br />ROGER JANES <br />BUSINESS ADMINISTRATOR <br />May 29, 2007 <br />i <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 />Mr. Todd Del Frate t 2007 <br />California Regional Water Quality Control Board ENVIR? A V"EAT HEALTH <br />Central Valley Region PEPPo,'iT/� RVICES <br />11020 Sun Center Drive, #200 <br />Rancho Cordova, California 95670-6114 <br />SUBJECT: REVISED COST ESTIMATES FOR CORRECTIVE ACTION AT THE <br />CORRAL HOLLOW AND HARNEY LANE SANITARY LANDFILLS <br />Dear Mr. Del Frate: vo <br />Q, <br />Enclosed please find revised cost estimate for corrective action at the Corral Hollow and Harney <br />Lane Sanitary landfills (prepared in association with Shaw Environmental and Infrastructure, Inc), <br />revised per your letter of January 9, 2007. At both landfills our assessment is that the likely <br />foreseeable scenario requiring corrective action is impact to groundwater by landfill gas. <br />Therefore, the proposed remediation scenarios, for the purpose of financial assurance, are <br />implementation of additional landfill gas control. The revisions include the cost for delineating a <br />contaminant plume and the infrastructure to support additional landfill gas wells. <br />Please review the enclosed estimates, and if you find them reasonable, we would greatly <br />appreciate a letter stating this for our transmittal to the California Integrated Waste Management <br />Board (CIWMB). In the past, CIWMB staff has required a letter from Regional Water Quality <br />Control Board staff stating whether estimated costs appear reasonable. Concurrence with the <br />magnitude of the estimate will also allow us to evaluate our options for financial assurance. <br />Please contact me at (209) 468-8504 with any questions. <br />Sincerely, <br />czlaz( <br />W. MICHAEL CARROLL, PE <br />Senior Civil Engineer <br />WMC:kb <br />N:\ Miseellaneous\ClosCostEst\FinAssur&Costs\TDelFrate02-RevCorrActCostEst.doc <br />Enclosures <br />c: Robert McClellon, Environmental Health Department <br />LA 1103C, LA 21125 <br />