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Water Quality Monitoring Report <br /> French Camp Landfill <br /> 4.5 Leachate Monitoring <br /> The laboratory results for leachate monitoring well MW-2 are summarized in Table 3. As shown <br /> on Table 3, no VOCs were detected in leachate monitoring well MW-2 during the monitoring <br /> period. <br /> 4.6 Surface Water Monitoring <br /> Field and laboratory results for surface water monitoring stations (SW-1, SW-2, and SW-3) for <br /> the current monitoring period are summarized in Table 4. Stations SW-1 and SW-2 are located <br /> upstream of the landfill within the Walker and French Camp Sloughs (respectively) and are used <br /> as background sampling points. Station SW-3 is located downstream of the landfill at the <br /> confluence of the two sloughs. A comparison of upgradient (SW-1 and SW-2) to downgradient <br /> (SW-3) surface water samples indicates generally similar inorganic constituent concentrations. <br /> No VOCs were detected in surface water samples during the monitoring period. <br /> Stream gauging was performed on January 24, March 29 and May 27, 2016, at monitoring <br /> points SG-1 and SG-2 and the data are summarized in Table 5. As shown in Figures 1 and 2, <br /> monitoring point SG-1 is located upgradient in the Walker Slough and monitoring point SG-2 is <br /> located upgradient in the French Camp Slough. <br /> 5.0 SOIL-PORE GAS MONITORING <br /> In accordance with WDR Order No. 115-2007-0046, perimeter soil-pore gas probes are <br /> monitored using a field screening protocol, and soil-pore gas samples are only collected if field <br /> screening indicates methane concentrations greater than 2.5 percent. During the monitoring <br /> period, field screening of soil-pore gas probes was conducted on March 16 and June 29, 2016. <br /> As shown on Table 6, methane was only detected in two of the soil-pore gas probes (SGP-7A <br /> and SPG-1A) at a concentration of 0.1 percent by volume. As a result, no samples were <br /> collected. <br /> 6.0 REFERENCES <br /> California Regional Water Quality Control Board, Central Valley Region, 2007, "Order No. R5- <br /> 2007-0046 Waste Discharge Requirements for Forward Inc. Allied Waste Industries Inc. <br /> for Post-Closure Maintenance of French Camp Municipal Solid Waste Landfill, San <br /> Joaquin County". <br /> CH2M Hill. 2000. Fourth Quarter/Annual 1999 Monitoring Report, Austin Road Landfill. <br /> January. <br /> Herst, 2005, "No Release Demonstration, French Camp Landfill". <br /> Project No.2016.0007 5 <br />