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• Collected samples, accompanied by a trip blank, were placed immediately in an ice-filled <br /> cooler for transport to a state-certified testing laboratory. Samples were kept chilled(at about <br /> 4°C)until delivery. <br /> • A completed Chain-of-Custody form, detailing the sample I.D. numbers, date and time <br /> collected, analyses requested, and other project information, accompanied each sample to the <br /> laboratory. The Chain-of-Custody forms were signed and dated by all personnel retaining <br /> custody of the samples(Appendix C). <br /> Surface-Water Sampling <br /> The sampling protocols listed below were generally followed during surface water sampling <br /> operations. <br /> • Surface-water sampling was performed by submerging laboratory-supplied sample <br /> containers, or a decontaminated dipper, in a slow moving portion of the surface water <br /> channel at the designated sampling station. <br /> • Sample preservation, order of collection, and Chain-of-Custody procedures described above <br /> for groundwater sampling were also adhered to for surface water sample collection. <br /> Soil-Pore Gas Sampling <br /> Soil-pore probes at the French Camp Landfill were sampled as follows: <br /> • Field measurements were completed using a Landtec GEM 2000 (or equivalent)that was <br /> calibrated daily with methane, carbon dioxide, and oxygen. <br /> • Each soil-pore gas probe was purged of at least one casing volume prior to recording the <br /> measured gas concentrations. <br /> • Fixed gases (methane, carbon dioxide, and oxygen) were measured and recorded in <br /> volumetric percent at each monitoring probe. <br /> • Following field measurements, gas sampling was performed, if necessary, using clean, <br /> laboratory-prepared summa canisters. <br /> • For purging, the gas-sampling pump was attached with Teflon®tubing to a sample port <br /> located at the top of the monitoring probe. After purging at least one casing volume and <br /> fixed gases are recorded, a summa canister was attached to the Teflon®tubing to the sample <br /> port and a sample was collected by releasing the vacuum on the summa canister. <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 /> 3 <br /> D:1FC_SApIan2SA09.doc GeoLoglc Associates <br />