ARCHIVED REPORTS_2014_3 - Laserfiche WebLink

Home Browse Search

Water Quality Monitoring Report Forward Landfill • and TICE were measured above their PQLs in samples from both domestic wells and DCDFM was also measured above the PQL in the sample collected from well 8106-A. Estimated trace concentrations of two VOCs were also measured in the sample collected from well 8106-A and one VOC was also measured at an estimated trace concentration in the sample from well 7898-A. 3.1.8 Vadose Zone Monitoring The current vadose-zone monitoring network at the Austin Unit consists of seven lysimeters. The lysimeter locations are shown on Figure 2-1. As recorded in the field notes for lysimeters (Appendix Q and summarized on Table 2-5, all Austin Unit lysimeters were reported dry, and as a result, no soil-pore liquid samples were collected during the current monitoring period. GLA and Forward are currently preparing a status report for the unsaturated zone monitoring system that will include a workplan to evaluate restoration of the vadose zone monitoring points. 3.1.9 Leachate/Surface Impoundment Monitoring For the Austin 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 (West) for evaporation. During the first quarter 2014, • leachate was observed at holding areas WMU FU-03, WMU FU-04, WMU FU-05, WMU FU-06, WMU FU-10, and WMU FU-13. Leachate logs summarizing the total flow and flow rate are presented in Appendix A. For surface impoundment WMU-F (West) Freeboard ranged from approximately 8.17 to 8.42 feet during the first quarter 2014 monitoring period. Appendix A presents copies of the freeboard observation logs and Dissolved Oxygen measurements. Leachate samples were collected on a quarterly basis and analyzed in the field for pH, specific conductance, temperature, and turbidity. The results of quarterly field monitoring measurements for the first quarter 2014 are presented in Table 3-7. 3.1.10 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 to surface water (waters of the United States) during the reporting period. Surface water monitoring stations ASW-1 (upstream) and ASW-2 (downstream) were reported dry during the first quarter 2014 monitoring period. 3.1.11 Groundwater Treatment Facility Operations • The Groundwater Treatment Facility (GTF) at the Austin Unit has been operational since 1994 to mitigate impacts from landfill releases. Impacted groundwater is extracted M:\2014.0012\FA_1Q14.docx 12 4/28/2014,Rev.0