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Water Quality Monitoring Report Forward Landfill 2015 monitoring period. Vadose zone monitoring stations were also reported dry or had an insufficient volume of soil-pore liquid to sample. 3.0 AUSTIN UNIT 3.1 Water Quality Monitoring 3.1.1 Sampling and Laboratory Analyses Del-Tech performed routine monitoring of DMP, CAP, EMP wells at the Austin Unit during the third quarter 2015 monitoring period. Depth-to-water measurements were recorded in the groundwater monitoring wells on September 1 and 3, 2015 and all groundwater monitoring wells and domestic wells were sampled between September 1 and 3, 2015. Vadose zone and surface water monitoring stations were reported dry during the monitoring period. During the monitoring period, Del-Tech reported that there was insufficient water to collect samples in groundwater monitoring wells AMW-4 and AMW-5R. Samples were collected from each sample point with sufficient liquid and submitted to BC for analysis of the routine monitoring parameters stipulated in RWQCB Order No. 85- 2014-0006. Table 2-1 presents the monitoring schedule and summarizes the analytical methods utilized during the current monitoring period. Wells AMW-1, AMW-7, AMW- 10, and AMW-13 were also sampled for total arsenic, nitrogen, iron, and manganese for the CWLAM program. Water quality samples were also analyzed in the field for ORP, turbidity, temperature, specific conductance, and pH and recorded on well data sheets. The groundwater monitoring wells, surface water monitoring locations, and leachate sumps/monitoring points were sampled in accordance with the sampling and analysis plan detailed in Appendix E. The well data sheets, raw laboratory data, certificates of analyses, and chain-of-custody records related to the sampling program are included in Appendix F. Field and laboratory analyses are summarized in Tables 3-1 through 3-7 and cumulative tabulated data for all monitoring points and constituents for groundwater, unsaturated zone, leachate, and surface water are presented in Appendix F. 3.1.2 QA/QC Results The QA/QC program completed for the third quarter 2015 water quality monitoring event at the Austin Unit included analyses of two trip blanks, one field blank, laboratory method blanks, and one duplicate sample (well 8106-A). The field, equipment, and trip blanks were analyzed for VOCs by EPA Method 8260 and method blanks were analyzed for all required analyses. The results of the QA/QC program indicate that calcium was measured at a trace concentration in one of the method blanks. However, this very low concentration did not affect the interpretation of primary sample results. Results from the duplicate groundwater sample collected from well 8106-A, presented along with the primary data in Table 3-5, yielded good correlation with quantifiable constituents having M:\2015.0014\FA 3Q15.docx 9