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Water Quality Monitoring Report Forward Landfill 2.1.5 Vadose Zone Monitoring The current vadose-zone monitoring network at the Forward Unit consists of 10 lysimeters (seven suction lysimeters and three pan lysimeters). These lysimeter locations are shown on Figure 2-1. As presented in Table 2-6, all lysimeters were reported dry or there was an insufficient volume of soil-pore liquid (2-3 milliliters) for analyses during the monitoring period. 2.1.6 Leachate/Surface Impoundment Monitoring Leachate sumps and surface impoundments are inspected weekly by Forward Landfill personnel. If leachate is detected in a sump, it is pumped into the surface impoundment WMU F (North) for evaporation. During the third quarter 2015, leachate was observed at holding areas WMU D-93/94, WMU D-01 N/S, and WMU D-02 and a total of 203,400 gallons of leachate was removed from the lined areas at an average rate of 2,211 gallons per day. For surface impoundment WMU-F (North), freeboard ranged from approximately 10.25 to 10.75 feet during the third quarter 2015 monitoring period. Appendix A presents copies of the leachate observation logs, freeboard observation logs, and surface impoundment monitoring log. Leachate samples are analyzed in the field for pH, specific conductance, temperature, and turbidity on a quarterly basis. Results of quarterly field monitoring measurements for the third quarter 2015 are presented in Table 2-7. 2.1.7 Surface Water Monitoring Site run-on and run-off control facilities are designed to effectively channel surface water to site stormwater/sedimentation ponds. According to the Operations Manager, there were no discharges from the Forward Unit to surface water during the reporting period. On August 19, 2015, surface water monitoring stations FSW-1 (downstream) and FSW-2 (upstream) were reported dry. 2.2 Summary Groundwater quality conditions beneath the Forward Unit during the third quarter 2015 monitoring period are generally similar to those observed in previous monitoring periods. A non-statistical indication of release was identified at wells MW-16 as a result of one VOC measured at a quantifiable concentration; and at well MW-17 as a result of two VOCs measured at a quantifiable concentrations. For the inorganic monitoring parameters, CLs were exceeded at wells MW-10, MW-18, and MW-19. Verification sampling for the organic and inorganic CL exceedances is scheduled for October 2015. For constituent concentrations in "Tracking Mode" increasing trends were calculated for chloroform at well MW-17 and bicarbonate at well MW-18, however, both constituents are well below MCLS. Surface water stations were reported dry during the third quarter M:\2015.0014\FA 3Q15.docx 8