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constituents at the Forward Unit have concluded that the CL exceedances are not the result of a release from the Forward Unit. Surface water samples collected from the upstream and downstream surface water monitoring stations during the first quarter 2013 monitoring period are generally consistent with each other and no VOCs were detected. These results suggest that landfill operations are not impacting surface water. The results of the five-year COC monitoring event indicates that with the exception of one chlorinated herbicide (dicamba), no organic COCs were detected in the groundwater and surface water samples. Since similar concentrations of dicamba were measured in the upstream and downstream samples, it is believed that the source of the herbicide is from agricultural activities up-stream of the landfill. Several inorganic COCs were detected in both up-gradient and down-gradient wells and surface water stations. The similarity in the concentrations in both up-gradient and down-gradient wells and surface water stations suggest that the inorganic COCs are naturally occurring and not related to the landfill. As a result, no changes to the current monitoring program are recommended at this time. 3.0 AUSTIN UNIT 3.1 WATER QUALITY MONITORING Sampling and Laboratory Analyses During the first quarter 2013, depth-to-water measurements were recorded in the groundwater monitoring wells on March 12, 2013, and all groundwater monitoring wells, domestic wells, and surface water stations were sampled by Del-Tech between March 12, and 19, 2013. Samples were collected from each sample point with sufficient liquid and submitted to BC for analysis of the parameters stipulated in RWQCB Order No. R5-2003-0049. During the first quarter 2013 monitoring period, samples were analyzed for the routine monitoring parameters and also included analyses of the five-year COCs 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 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. CA2013-002IWA_1 Q 13.aoc 8 Geo-Logic Associates