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Water Quality Monitoring Report Forward Landfill 2.2 Summary Environmental monitoring for the Forward Unit during the third quarter 2017 monitoring period indicates that non-statistical indication of release were identified at wells MW-2A as a result of three VOCs measured at trace concentrations; at well MW-16 as a result of one VOC measured at a quantifiable concentration; and at well MW-17 as a result of three VOCs measured at quantifiable concentrations and four VOCs measured at trace concentrations. Of note, these quantifiable 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-15, MW-17, MW-18, MW-19, 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 barium, bicarbonate, calcium, magnesium, and potassium at well MW-10; carbon tetrachloride and TCFM at well MW-17; sodium at well MW-18; and sodium at well MW-24. For vadose zone monitoring stations soil-pore liquid samples were collected from W-2, LY-A, and LY-BG-1 and a quantifiable concentration of t-butyl alcohol was measured in lysimeter LY-BG-1. 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 2017 monitoring period. Depth-to-water measurements were recorded in the groundwater monitoring wells on August 1 and 31, 2017. Groundwater sampling was performed between August 1 and 31, 2017, and surface water stations were sampled on August 23, 2017. 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. 115-2014-0006. Table 2-1 presents the monitoring schedule and summarizes the analytical methods utilized during the current monitoring period. In addition, wells AMW-1, AMW-7, AMW-10, and AMW- 13 were also sampled for total arsenic, nitrogen, iron, and manganese for the CWLAM program; and wells AMW-1, AMW-2, AMW-4, AMW-7, and leachate sump FU-04, FU-06, FU-08, FU-13/14 were also analyzed for dissolved inorganic/metals as required by Water Code Section 13267 Order for Technical Reports Regarding Acceptance of Hazardous Waste, Forward Landfill, San Joaquin County dated May 16, 2017. It should be noted that well AMW-2 was not sampled for the additional dissolved inorganic/metals due to a transcription error in the sample request and FU-08 was reported dry. All water quality samples were 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 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 Project No.S017.1030 I Water Quality Monitoring Report 9 October 2017