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Water Quality Monitoring Report <br /> Forward Landfill <br /> • MW-19—potassium <br /> • MW-22—chloride <br /> • MW-24—sodium <br /> In a letter dated July 25, 2016, the RWQCB was notified of these CL exceedances and <br /> retesting is scheduled for July 2016. The results of the verification sampling will be <br /> reported under separate cover. <br /> Tracking Mode <br /> Constituent concentrations reported above a CL and confirmed in retest samples within <br /> the previous three years of monitoring were placed in "Tracking Mode" and are <br /> evaluated for temporal trends using Mann-Kendall trend analyses. The results of the <br /> trend analyses indicate that increasing trends were calculated for DIPS at well MW-16 <br /> and for carbon tetrachloride and chloroform at well MW-17 (Table 2-5). Mann-Kendall <br /> trend analyses calculations are presented in Appendix G. As discussed previously, <br /> Forward is in the process of implementing interim corrective actions measures by <br /> bringing several inactive LFG extraction wells online at the Forward Unit. <br /> 2.1.5 Vadose Zone Monitoring <br /> The current vadose-zone monitoring network at the Forward Unit consists of 10 <br /> lysimeters (seven suction lysimeters and three pan lysimeters). These lysimeter <br /> locations are shown on Figure 2-1. As shown on Table 2-6, with the exception of <br /> background lysimeter LY-BG-1 all of the lysimeters for the Forward Unit were reported <br /> dry. As summarized on Table 2-613, no VOCs were detected in the lysimeter sample <br /> collected from lysimeter LY-BG-1. <br /> 2.1.6 Leachate/Surface Impoundment Monitoring <br /> Leachate sumps and surface impoundments are inspected weekly by Forward Landfill <br /> personnel. If leachate is detected in a sump, it is pumped into the surface <br /> impoundment WMU F (North) for evaporation. During the second quarter 2016, <br /> leachate was observed at holding areas WMU D-93/94, WMU D-01 N/S, and WMU D-02 <br /> and a total of 131,400 gallons of leachate was removed from the lined areas at an <br /> average rate of 1,444 gallons per day. For surface impoundment WMU-F (North), <br /> freeboard ranged from approximately 8.08 to 8.50 feet during the second quarter 2016 <br /> monitoring period. Appendix A presents copies of the leachate observation logs, <br /> freeboard observation logs, and surface impoundment monitoring log. <br /> Leachate samples are analyzed in the field for pH, specific conductance, temperature, <br /> and turbidity on a quarterly basis. Results of quarterly field monitoring measurements <br /> for the second quarter 2016 are presented in Table 2-7. <br /> M:\2016.0007\FA 2Q16.docx 8 <br />