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Water Quality Monitoring Report Forward Landfill 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 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 3-8 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 second quarter 2016 water quality monitoring event at the Austin Unit included analyses of four trip blanks, one field blank, laboratory method blanks, and one duplicate sample (well AMW-29). 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 acetone was detected in one of the QA/QC trip blank samples. Review of the primary data indicates that an anomalous concentration of acetone was measured in the primary sample collected from well AMW-25 and was flagged as a suspected field/laboratory contaminant. Results from the duplicate groundwater sample collected from well AMW-29 are presented along with the primary data in Table 3-2 yielded good correlation with quantifiable constituents having a RPD less than nine percent. Review of laboratory analysis dates and required holding times indicates that all samples were submitted and analyzed within the required holding times during the second quarter 2016. Based on the results of the laboratory blank and duplicate analyses, it is concluded that acceptable QA/QC procedures were exercised and the water quality samples collected from the Austin Unit appear to be representative of water quality at the site. 3.1.3 Groundwater Elevations and Contours Prior to purging and sampling, each well was sounded for water depth using a weighted electronic sounder, and the static water level was recorded on a well data sheet (Appendix F). The groundwater elevations were calculated for each well by subtracting the depth-to-water measurement from the top-of-casing reference elevation. The current groundwater elevation data for the Austin Unit are summarized in Table 3-6. The groundwater elevation data obtained during this quarterly monitoring period were used to generate the groundwater elevation contour map shown on Figure 3-1, which indicates that groundwater generally flows in a north to northeast direction M:\2016.0007\FA 2Q16.docx 10