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2.0 FORWARD UNIT Is 2.1 WATER QUALITY MONITORING 2.1.1 Sampling and Laboratory Analyses During the third quarter 2006, all of the groundwater monitoring wells and surface water stations were sampled by Bryan A. Stirrat&Associates(BAS)on August 28 and 30, 2006. Prior to collection of samples, depth-to-water measurements were recorded in all groundwater monitoring wells on August 28,2006. All lysimeters were inspected and a vacuum was set on August 28, 2006. The lysimeters were checked for soil-pore liquid on September 29, 2006 and with the exception LY-BG-1, all lysimeters were dry. A single sample set was collected from each sampling point and submitted to BC Laboratories, Inc. (BC) of Bakersfield, California, a state certified laboratory under contract to Forward. Samples were analyzed for the parameters stipulated in RWQCB Order No. R5-2003-0049. Table 2-1 summarizes site monitoring parameters, analytical methods, and monitoring frequency. Water quality samples were also analyzed in the field for dissolved oxygen, turbidity,temperature, specific conductance, and pH and recorded on well data sheets. The groundwater monitoring wells, surface water monitoring points, and leachate monitoring points(sampled monthly)were sampled in accordance with the sampling and analysis procedures detailed in Appendix B. The well data sheets, laboratory data, certificates of analyses, and chain-of-custody records for the sampling program are included in Appendix C. The laboratory analyses and field results for groundwater monitoring wells, lysimeter and leachate sampling stations are summarized in Tables 2-2 through 2-7. 2.1.2 QA/QC Results The QA/QC program completed for the third quarter 2006 water quality monitoring event included analyses of three ambient(field)blanks, four trip blanks, four laboratory method blanks, and one duplicate sample. The trip and field blanks were analyzed for VOCs by EPA Method 8260,while method blanks were analyzed for all of the monitoring parameters. Trace and/or quantifiable concentrations of VOCs including acetone, bromoform,bromodichloromethane, chloroform,dibromochloromethane, and methylene chloride were detected in QA/QC ambient,trip, equipment, and method blank samples during the third quarter 2006 monitoring period. Review of the analytical data indicates that bromoform and dibromochloromethane were detected in several of the primary samples collected, and were flagged as suspected laboratory contaminants. BC was notified about the suspected laboratory contaminants and performed an internal QA/QC investigation which concluded that the suspected laboratory contaminants were the result of contaminated VOA containers. BC has since destroyed all VOA containers from the contaminated batches. D:12003 021\ForwardAustin sum".doc 4 Geologic Associates