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California Regional Water Quality Control Board <br /> �� Central Valley Region <br /> Robert Schneider,Chair Gray Davis <br /> R_ -ion H.Hickoz <br /> Secretaryfor Fresno Branch office Governor <br /> Environmental lnteraet Address: httpJhvww_%=b.c- <br /> Protection 3614 East Ashlan Avenue,Fresno,Ca <br /> Phot:e(559)445-5116•FAX(559 <br /> 21 June 2002 <br /> ' W.Michael Carroll,PE <br /> County of San Joaquin <br /> Department of Public Works <br /> P.O.Box 1810 <br /> Stockton, CA 95201 <br /> ' <br /> CLOSURE OF MOD ULE LF-1,EYAL UATIONMOMTORING PROGRAM,AND MOD ULE 1 <br /> DEMONSTRATION OF MEETING LL1-ER PERFORMANCE STANDARDS, FOOTHILL <br /> SAM, TARYLANDFLLL, CALAYERAS COUNTY(Case No: 1928) ' <br /> We have reviewed the compliance record for the Foothill Sanitary Landfill regulated by Waste <br /> Discharge Requirements(WDRs) Order No.94-258 and applicable laws,regulations,plans,and policies <br /> of the Regional Board. ,Our review included documentation regarding the Evaluation Monitoring <br /> Program and the.newly submitted Liner Performance Demonstration for Module I and Future Modules <br /> at the Foothill Sanitary Landfill(Report),-dated 4.June 2002,as pr aced by EMC.ON/OWT,-Inc. Based <br /> on'cW revie.v;thine are tas'estha���.,�befmalized in vrderto.eomplg-mtYrthe uiri standards of <br /> Title 27, California Code of Regulations,Division 2, Subdivision 1 (Title 27). <br /> Closure of Module LF-1 <br /> The Foothill Sanitary Landfill(FSL)currently has one unlined Module LF-1. Groundwater monitoring <br /> wells have detected Volatile Organic Compounds(VOCs)and possibly minerals and metals above <br /> background concentrations. The Board's letter of 29 January2001 states the following::: <br /> "Waste Discharge Requirements Order No.94-258 lists general plans for the expansion to the new units. <br /> and closure of the existing unit.1 Additionally,the revised."Preliminary Closure and It <br /> Maintenance Plan"(dated May 1994)indicates general plans for the expansion and for the closure of the <br /> existing unit...The county has submitted an Evaluation Monitoring Plan for a Volatile Organic <br /> Compound release to groundwater and suspects that landfill gas maybe contnbuting to.the VOC release. <br /> It is appropriate at this time to prepare a schedule for final cover and closure of the existing unit(1),as <br /> well as a final closure plan with the cost details for unit I. The Final Closure plan may need to refer to <br /> corrective action for the existing unit Closure and supporting documentation§hall comply,at a - <br /> minimum,with the California Code of Regulations(CCR),Title 27 ..:as indicated in the May 1994 <br /> ' Preliminary Closure Plan....Please respond to this letter in writing by 16 February 2001... <br /> The County's letter of response,dated 6 February 2001,states,"The development of a new waste <br /> management module and subsequent closure of the current area of fill is currently slated for 2003:.' <br /> California Environmental Protection Agency <br /> �e1 Recycled Paper - <br /> The energy cbaIkage facing Califbraia is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> - .___.__.__ r., .a..,.,..a OnA cut your enerev costs,see our Web-site at httpJ/wwwswreb.ca.gov/rwgcb5 <br />