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Water Quality Monitoring Report Forward Landfill MW-17; and sodium at well MW-24. Surface water samples collected from the upstream and downstream surface water monitoring stations during the first quarter 2017 monitoring period were generally consistent with each other; no VOCs were detected and no CLs were exceeded. For vadose zone monitoring stations soil-pore liquid samples were collected from lysimeters LY- BG-1 and LY-W2 and a quantifiable concentration of t-butyl alcohol was measured in background 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 first quarter 2017 monitoring period. Depth-to-water measurements were recorded in the groundwater monitoring wells on February 13 and March 10, 2017. Groundwater sampling was performed between February 13 and March 10, 2017, and surface water stations were sampled on January 17, 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. Wells AMW-1, AMW-7, AMW-10, and AMW-13 were also sampled for total arsenic, nitrogen, iron, and manganese for the CWLAM program. 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 D. The well data sheets, raw laboratory data, certificates of analyses, and chain-of-custody records related to the sampling program are included in Appendix E. Field and laboratory analyses are summarized in Tables 3-1 through 3-8 and cumulative tabulated data for all monitoring points and constituents for groundwater, unsaturated zone, leachate, and surface water are presented in Appendix E. 3.1.2 QA/QC Results The QA/QC program completed for the first quarter 2017 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 AMW-5R). The field 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 no VOCs or inorganic constituents were detected in the trip, field, or method blanks. Results from the duplicate groundwater sample collected from well AMW- 5R are presented along with the primary data in Table 3-1. The duplicate sample analyses yielded good correlation with quantifiable constituents having a RPD within 9 percent. Exceptions include strontium which had an RPD of 24 percent. Review of laboratory analysis Project No.5017.1030 I Water Quality Monitoring Report n 9 April 2017