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For purging and sampling,the gas-sampling pump was attached with Teflon®tubing to a <br /> sample port located at the top of the monitoring probe. After attaching the sample train to the <br /> probe,the probe was purged for 30 to 50 seconds to flush out the probe and sample train. <br /> After the probe and train were flushed,the pump and tubing were attached to the Tedlar <br /> sample bag. All gas samples were pumped directly from the gas-monitoring probe via the <br /> stainless steel sampling pump and through new factory-cleaned Teflon®tubing into the <br /> Tedlar®bags. <br /> • Chain-of-Custody procedures described above for groundwater samples were also adhered to <br /> for both the soil-pore gas and landfill gas samples, and the analytical records and chain-of- <br /> custody forms are included in Appendix A. <br /> 4 <br /> D:NFC_SAplanw07.doc <br /> GeoLogic Associates <br />