ARCHIVED REPORTS_2017_3 - Laserfiche WebLink

Home Browse Search

Water Quality Monitoring Report Forward Landfill 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 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 for the fourth quarter 2016 monitoring period (Appendix Q. 3.1.11 Corrective Action Monitoring The Groundwater Treatment Facility (GTF) at the Austin Unit has been operational since 1994 to mitigate impacts from landfill releases. Impacted groundwater is extracted from four wells (EW -1, EW -2, EW -311, and EW -4) that pump groundwater through an air stripper treatment system to remove VOCs. Treated groundwater is discharged to an infiltration pond (constructed in 2003) north of the Austin Road Unit of the Forward Landfill. During the monitoring period, the GTF treated 19.4 million gallons of groundwater and removed approximately 0.85 pounds of VOCs. Details regarding corrective action remediation system operations and performance evaluation for the fourth quarter 2016 are presented in Appendix 0 C. C 3.2 Summary Groundwater quality conditions beneath the Austin Unit during the fourth quarter 2016 monitoring period were generally similar to historical results. Excluding suspected laboratory contaminants, CL exceedances and/or non -statistical indication of release were identified at DMP wells AMW-6, AMW-12 during the fourth quarter 2016 monitoring period. It is recognized that well AMW-6 should have been identified as a CAP well in the M&RP. For the CAP/evaluation wells, 17 of 28 wells reported one or more VOCs exceeding a PQL, with CAP well AMW-1 having the greatest number of VOCs (12), including 11 measured above a PQL. All surface water stations and lysimeters were reported dry or there was an insufficient volume of soil -pore liquid for analysis during the fourth quarter 2016 monitoring period. Under the existing CAP, the GTF pumped 19.4 million gallons of groundwater removing an estimated 0.85 pounds of VOCs. 4.0 ANNUAL SUMMARY 4.1 General During the 2016 monitoring year, groundwater elevations and groundwater and surface water sampling was performed at the Forward Landfill on a quarterly basis. The groundwater and surface water samples were analyzed for the monitoring parameters summarized in Table 2-1, Project No. 2016.0007 1 Water Quality Monitoring Report 14 January 2017