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E <br />U] <br />Groundwater, Vadose, and Surface Water Sampling and Analyses Quantities <br />for Estimating Postclosure Maintenance Costs <br />Type and Number of Monitorling Facilities Sampling Events Per/Year AnalysesNea <br />Groundwater Wells, 10 Wells at Closure Quarterly, 40 40 <br />Vadose Stations, 20 Stations at Closure Semi -Annually, 20 (1) 8 0) <br />Leachate Sumps, 7 Sumps at Closure Annual, 7 7 <br />Surface Water, 6 Samples Per Year at Present 6 Samples Per Year 6 <br />and at Closure <br />Total 61 <br />(1) To date, no samples have been detected/recovered from the 8 existing stations. Assume Postclosure sampling 10 <br />select stations semi-annually, with sample recovery at 4 stations. Therefore there will be 8 analyses/Year <br />PCMP for NCRCSL E-5 Department of Public WorkslSofid Waste <br />OASan Joaquin CountyANCRCSLIl18040PCPMP�Fma1 ReporAPCPMP_Rev_JarL2010. Doc County of San Joaquin - January 7, 2010 <br />