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Water Quality Monitoring Report Forward Landfill 2.1.6 Leachate/Surface Impoundment Monitoring For the Forward Unit, 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 first quarter 2017, leachate was observed at holding areas WMU D-93/94, WMU D-01N/S, and WMU D-02 and a total of 63,378 gallons of leachate was removed from the lined areas at an average rate of 696 gallons per day. For surface impoundment WMU-F (North), freeboard ranged from approximately 7.83 to 9.33 feet during the first quarter 2017 monitoring period. Appendix A presents copies of the leachate observation logs, freeboard observation logs, and surface impoundment monitoring log. Leachate samples from Forward Unit and Compost Area retention basins are analyzed in the field for pH, specific conductance, temperature, and turbidity on a quarterly basis. Results of quarterly field monitoring measurements for the first quarter 2017 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 (waters of the United States) during the reporting period. Surface water monitoring stations FSW-1 (downstream) and FSW-2 (upstream) were sampled on January 18, 2017 for the first quarter 2017 monitoring period. Table 2-8 summarizes the current analytical results of surface water samples collected at the Forward Unit. As shown on Table 2-8, similar concentrations were measured in both up and downstream samples and no VOCs were detected in either sample. Furthermore, no CLs were exceeded at downstream point FSW-1. 2.2 Summary Environmental monitoring for the Forward Unit during the first quarter 2017 monitoring period indicates that non-statistical indication of release were identified at wells MW-2A as a result of one VOC measured at trace concentrations and one VOC measured at a quantifiable concentration; at well MW-13 as a result of one VOC measured at a quantifiable concentration; at well MW-14 as a result of one VOC measured at a quantifiable concentration; at well 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. Of note, these organic constituents have been previously confirmed and are currently in "Tracking Mode". For the inorganic monitoring parameters, CLs were exceeded at wells MW-10, MW-13, MW-17, MW-18, MW-19, MW-22, and MW-24. All of the inorganic CL exceedances were placed in "Tracking Mode" and are being evaluated for temporal trends. For constituent concentrations in "Tracking Mode", increasing trends were calculated for cis-1,2-DCE at well MW-2A; bicarbonate, calcium, potassium, sodium, strontium at well MW-10; DIPE at well MW-16; carbon tetrachloride at well Project No.S017.1030 I Water Quality Monitoring Report 8 April 2017