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4.0 SOIL-PORE GAS MONITORING <br /> Soil-pore gas monitoring at the French Camp Landfill is monitored under a separate <br /> contract and reported under separate cover. <br /> 5.0 WATER QUALITY MONITORING <br /> 5.1 SAMPLING AND LABORATORY ANALYSES <br /> All of the groundwater monitoring wells and surface water monitoring points were <br /> sampled on February 2, 2006. Prior to collection of samples, depth-to-water <br /> measurements were recorded for all groundwater monitoring wells. <br /> A single sample set was collected from each sampling point(groundwater, leachate, and <br /> surface water)and analyzed for the parameters stipulated in RWQCB Order No. R5- <br /> 2004-0159, and are summarized in Table 1. Water quality samples were also analyzed in <br /> the field for dissolved oxygen, turbidity, temperature, specific conductance, and pH and ' <br /> the field measurements were recorded on well data sheets. The groundwater monitoring <br /> wells and surface water monitoring points were sampled in accordance with the sampling <br /> and analysis procedures detailed in Appendix B. Well data sheets,raw laboratory data, <br /> certificates of analyses, and chain-of-custody records for the sampling program are <br /> included in Appendix C. The laboratory analyses and field results for groundwater wells <br /> and surface water sampling stations are summarized in Tables 2 through 5. <br /> 5.2 QA/QC RESULTS <br /> The quality assurance/quality control(QA/QC)program completed for the first quarter ' <br /> 2006 water quality monitoring event included analyses of one duplicate sample, one field <br /> (ambient)blank,one trip blank, and one laboratory method blank. The trip, field, <br /> equipment, and laboratory method blanks were analyzed for volatile organic compounds <br /> (VOCs)by EPA Method 8260. Low-level VOCs including benzene, ethylbenzene, <br /> toluene, and total xylenes were detected in QA/QC ambient and trip blank samples during <br /> the first quarter 2006 monitoring period. However, with the exception of the leachate <br /> sample collected from well MW-lA these suspected field contaminants were not detected <br /> in the primary samples collected. Historically,these VOCs have been detected in the <br /> sample collected from well MW-1A, so these detections were not flagged as suspected <br /> field contaminants. <br /> i <br /> 1 <br /> D:0005_021%YC_w06.doc <br /> 2 Geologic Associates <br />