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The results of water quality analyses completed for surface-water monitoring stations are generally consistent with previous results. During the monitoring period, no VOCs were detected in any of the surface water stations, and potassium was the only surface water constituent that exceeded a concentration limit. However, review of the analytical data indicates the presence of elevated potassium concentrations at both upstream and downstream monitoring locations. It is believed that the concentration limit exceedance for potassium at downstream location SW-3 may be due to a recent change in natural surface water chemistry in the vicinity of the site. With the exception of turbidity at all three surface-water samples and carbonate alkalinity at surface water stations SW-1 and SW-3, no statistically significant increasing trends were noted. Since turbidity and carbonate alkalinity exhibit statistically significant increasing trends in both upstream and downstream surface water stations,these increasing trends are unlikely to be indicative of an impact from the facility. The field screening results from soil-pore gas monitoring probes indicates that no methane was measured in soil-pore gas monitoring probes during the monitoring period. 7.0 REFERENCES California Regional Water Quality Control Board, Central Valley Region, 2007, "Order No. R5-2007-0046 Waste Discharge Requirements for Forward Inc. Allied Waste Industries Inc. for Post-Closure Maintenance of French Camp Municipal Solid Waste Landfill, San Joaquin County". C112M Hill. 2000. Fourth Quarter/Annual 1999 Monitoring Report, Austin Road Landfill. January. Herst&Associates ("Herst"). 2005. No Release Demonstration—Second Quarter 2004 Event, French Camp Landfill. January. Herst&Associates ("Herst"). 2011. First Quarter 2011 Semi-Annual Monitoring Report,French Camp Landfill, California. D:12011-0051\FC_1SAILdocx 6 GeoLogic Associates