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Surface water samples collected from the upstream and downstream surface water monitoring stations during the third quarter 2013 monitoring period are generally consistent with each other and no VOCs were detected. 3.0 AUSTIN UNIT 3.1 WATER QUALITY MONITORING Sampling and Laboratory Analyses During the third quarter 2013,depth-to-water measurements were recorded in the groundwater monitoring wells and with the exception of well AMW-14 samples were collected from all groundwater monitoring wells, domestic wells, and surface water stations by Del-Tech between August 1 and 5, 2013. Well AMW-14 was damaged by agricultural equipment, and as a result, was not sampled during the monitoring period. The well head was subsequently repaired and will be sampled during the fourth quarter 2013 monitoring event. 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. R5-2003-0049. Table 2-1 presents the monitoring schedule and summarizes the analytical methods utilized during the current monitoring period. 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 procedures detailed in Appendix B. The well data sheets,raw laboratory data, certificates of analyses, and chain-of-custody records related to the sampling program are included in Appendix C. Field and laboratory analyses are summarized in Tables 3-1 through 3-6. QA/QC Results The QA/QC program completed for the third quarter 2013 water quality monitoring event at the Austin Unit included analyses of one trip blank,two field blanks, laboratory method blanks, and one duplicate sample. 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 a trace concentration of styrene and a quantifiable concentration of acetone were detected in field blank samples. Review of the analytical results indicates that neither of these VOCs was detected in the primary samples. In addition, inorganic constituents including arsenic, barium, chloride, sodium, and TOC were measured at trace concentrations in method blanks. These constituents were measured at very low concentrations that did not affect the interpretation of primary sample results. A duplicate sample was collected from monitoring well AMW-5R. Duplicate groundwater results are presented along with the primary data in Table 3-2. The duplicate sample analyses generally yielded good correlation with most quantifiable constituents having a relative percent difference (RPD) of eight percent or less. Only C:\2013-0021\FA_3Q13.doc 8 Geo-Logic Associates