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2.0 FORWARD UNIT <br /> 2.1 WATER QUALITY MONITORING <br /> 2.1.1 Sampling and Laboratory Analyses <br /> During the second quarter 2007, depth-to-water measurements were recorded in all <br /> groundwater monitoring wells on May 7,2007 and the groundwater monitoring wells <br /> were sampled by ATC Associates(ATC)between May 7 and 10,2007. Surface water <br /> stations were sampled on May 8, 2007. All lysimeters were inspected and a vacuum was <br /> set on May 10, 2007. The lysimeters were checked for soil-pore liquid on June 6,2007, <br /> and sufficient soil-pore liquid was present to collect samples from lysimeters E-2,W-2, <br /> LY-A, and LY-BG1. <br /> A single sample set was collected from each point containing sufficient liquid and <br /> submitted to BC Laboratories, Inc. (BC)of Bakersfield, California, a state certified <br /> laboratory under contract to Forward. Samples were analyzed for the parameters <br /> stipulated in RWQCB Order No. R5-2003-0049. Table 2-1 summarizes site monitoring <br /> parameters, analytical methods, and monitoring frequency. Water quality samples were <br /> also analyzed in the field for dissolved oxygen, turbidity,temperature, specific <br /> conductance, and pH and recorded on well data sheets. The groundwater monitoring <br /> wells, surface water monitoring points, and leachate monitoring points were sampled in <br /> accordance with the sampling and analysis procedures detailed in Appendix B. The well <br /> data sheets, laboratory data,certificates of analyses, and chain-of-custody records for the <br /> sampling program are included in Appendix C. The laboratory analyses and field results <br /> for groundwater monitoring wells, lysimeter and leachate sampling stations are <br /> summarized in Tables 2-2 through 2-8. ° <br /> 2.1.2 QA/QC Results <br /> The quality assurance/quality control(QA/QC)program completed for the second quarter <br /> 2007 water quality monitoring event included analyses of four field blanks, three trip <br /> blanks,two equipment blanks, four laboratory method blanks, and one duplicate sample. <br /> The trip, field, equipment, and laboratory method blanks were analyzed for volatile <br /> organic compounds(VOCs)by EPA Method 8260. The results of the QA/QC program <br /> indicate that chloroform was detected in several of the QA/QC field, equipment, and <br /> laboratory method blanks; and benzene, ethylbenzene,toluene, and xylenes was detected <br /> in one of the equipment blanks during the second quarter 2007 monitoring event. Review <br /> of the primary sample results indicates that toluene was detected in one of the primary <br /> samples collected from the Forward Unit and was flagged as a suspected field/laboratory <br /> contaminant. During the second quarter 2007 monitoring event, a duplicate sample was <br /> collected from well MW-18 and labeled MW-DUP. As shown on Table 2-2, the <br /> duplicate sample analyses yielded good correlation(within 10%)with the primary sample <br /> results. Of note, concentrations less than the practical quantitation limit(PQL)were not <br /> included in the comparison since these are estimated values. <br /> D:X2007_0043\ForwardAustin_sp07.doc <br /> 4 Geologic Associates <br />