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from well MW-10A,none of the constituents that exceeded a CL exhibited a statistically <br /> significant increasing trend during the monitoring period. Previous statistical <br /> exceedances for chloride and TDS have been identified in samples from well MW-l0A <br /> and a NRD for groundwater monitoring well MW-l0A(Herst, 2005) concluded that the <br /> French Camp Landfill has been impacted by saltwater intrusion and elevated chloride and <br /> TDS concentrations measured in well MW-10A are believed to be the result of this <br /> condition and not the result of landfill-related impacts. With the exception of one <br /> estimated trace level concentration of TCFM in the sample collected from well MW-9A, <br /> no VOCs were detected in any of the groundwater monitoring wells during the <br /> monitoring period. <br /> The results of water quality analyses completed from the surface-water monitoring <br /> stations are generally consistent with previous results. No VOCs were detected in the <br /> samples collected from the surface-water stations during the monitoring period. A <br /> comparison of upgradient(SW-1 and SW-2)to downgradient(SW-3) surface-water <br /> samples indicates generally similar inorganic constituent concentrations in the upgradient <br /> and downgradient surface water station, suggesting that the landfill is not impacting <br /> surface water quality. During the current monitoring period, no CL were exceeded, and <br /> with the exception of carbonate at surface-water station SW-1 and turbidity in all three <br /> surface-water samples, no statistically significant increasing trends were noted. As noted <br /> above, surface-water stations SW-1 and SW-2 are background surface-water monitoring <br /> points and increasing water quality trends at these points are not indicative of an impact <br /> from the facility. Furthermore, given that turbidity exhibits a statistically significant <br /> increasing trend at background surface-water points SW-1 and SW-2,the increasing trend <br /> in turbidity at SW-3 is unlikely to be indicative of an impact from the landfill. <br /> Field screening results from soil-pore gas monitoring probes indicate that no methane <br /> was measured in soil-pore gas monitoring probes during the monitoring period, or over <br /> the past year. <br /> 8.0 REFERENCES <br /> California Regional Water Quality Control Board, Central Valley Region, 2007, "Order <br /> No. R5-2007-0046 Waste Discharge Requirements for Forward Inc. Allied Waste <br /> Industries Inc. for Post-Closure Maintenance of French Camp Municipal Solid <br /> Waste Landfill, San Joaquin County". <br /> C112M Hill. 2000. Fourth Quarter/Annual 1999 Monitoring Report,Austin Road <br /> Landfill. January. <br /> Herst& Associates ("Herst"). 2005. No Release Demonstration—Second Quarter 2004 <br /> Event, French Camp Landfill. January. <br /> Herst&Associates("Herst"). 2010. Statistical Analysis of third quarter 2010 <br /> Groundwater Sampling Results, French Camp Landfill. <br /> D:\201M030\1FC_2SA10.doc <br /> 8 <br />