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I <br /> 1. Pa.UIN <br /> Ole <br /> " THOMAS R. FLINN P.O.BOX 1810-1810 E. HAZELTON AVENUE <br /> DIRECTOR ` Wft STOCKTON,CALIFORNIA 95201 <br /> .1 209 468-3000 FAX 209 468-2999 <br /> 4crFoa�` <br /> f rqLpubworks <br /> THOMAS M.GAU 77[ <br /> CHIEF DEPUTY DIRECTOR <br /> MANUEL SOLORIO worlemgfor YOU <br /> DEPUTY DIRECTOR O C I 2 2008 <br /> STEVEN WINKLER ENOR,l q\jy' -i��I HEALTH <br /> DIRECTOR ��Erll�;I i�SE R��i V <br /> ROGER JANES 1 <br /> BUSINESS ADMINISTRATOR September 30, 2008 <br /> Mr. Todd Del Frate <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 11020 Sun Center Drive, #200 <br /> Rancho Cordova, California 95670-6114 <br /> SUBJECT: REVISED COST ESTIMATES FOR CORRECTIVE ACTION AT <br /> FOUR SAN JOAQUIN COUNTY-OWNED SANITARY LANDFILLS <br /> Dear Mr. Del Frate: ,,(( � <br /> '1° <br /> Enclosed please find revised cost estimate for corrective action against a reasonably foreseeable <br /> release at each of the four County-owned Sanitary landfills. These estimates are in accordance with <br /> previously approved corrective action cost estimates, updated as follows: <br /> • Operation costs are accumulated over a 30-year corrective action period <br /> • Costs of the landfill gas components are increased to reflect a contractor's bid submitted June <br /> 2008 for similar work at our Corral Hollow Landfill <br /> • Costs for other components are increased by 2.7% in accordance with the California Integrated <br /> Waste Management Board's annual escalation factor <br /> have also included excerpts from our previous cost estimate, for ease of comparison. i <br /> Please review the enclosed estimates, and if you find them reasonable, we would greatly appreciate a <br /> letter stating this for our transmittal to the California Integrated Waste Management Board (CIWMB). <br /> Please contact me at (209) 468-8504 with any questions. <br /> Sincerely, <br /> f Q01 <br /> W. MICHAEL CARROLL, PE <br /> Senior Civil Engineer <br /> WMC:kb <br /> N:WMiscellaneous\FinancialAssurance\CorrAct\TDelFrate03-RevCorrActCostEstO8.doc <br /> Enclosures <br /> c: Robert McClellon, Environmental Health Department <br /> Elizabeth Castaheda, CIWMB Financial Assurance Section (via email) <br /> LR 50200 <br />