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U 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 fourth quarter 2016, leachate was observed at holding areas WMU D-93/94, WMU D-01N/S, and WMU D-02 and a total of 172,800 gallons of leachate was removed from the lined areas at an average rate of 1,899 gallons per day. For surface impoundment WMU-F (North), freeboard ranged from approximately 9.17 to 9.58 feet during the fourth quarter 2016 monitoring period. Appendix A presents copies of the leachate observation logs, freeboard observation logs, and dissolved oxygen measurements. 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 fourth quarter 2016 are presented in Table 2- 7. In addition to quarterly monitoring, leachate is sampled annually during the fourth quarter monitoring period for the parameters listed in Table 2-1. Results of quarterly field monitoring and analytical results for the fourth quarter 2016 are presented in Table 2-7. As shown in Table 2-7, 13 VOCs were detected in the WMU F (North) leachate sample and one VOC was measured at a trace concentration in the Compost Area sample. 0 2.1.7 Surface Water Monitoring n 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 reported dry during multiple inspections for the fourth quarter 2016 monitoring period. Bimonthly inspections for surface water were performed by Del -Tech on October 14, October 31, November 18, November 30, December 7, and December 22, 2016 during the fourth quarter 2016 monitoring period (Appendix Q. 2.2 Summary Groundwater quality conditions beneath the Forward Unit during the fourth quarter 2016 monitoring period are generally similar to those observed in previous monitoring periods. A non -statistical indication of release was identified at wells MW -2A as a result of two VOCs measured at trace concentrations; 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 and one VOC measured at a trace concentration. However, all of the VOCs are well below MCLS. 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 -2A, MW -10, MW -13, MW -15, MW -17, MW -18, MW -19, MW -22, and MW -24. Project No. 2016.0007 1 Water Quality Monitoring Report 9 January 2017