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• Collected samples, accompanied by a trip blank, were placed immediately in an ice- <br /> filled cooler for transport to a state-certified testing laboratory. Samples were kept <br /> chilled (at about 4°C) until delivery. <br /> • A completed Chain-of-Custody form, detailing the sample I.D. numbers, date and <br /> time collected, analyses requested, and other project information, accompanied each <br /> sample to the laboratory. The Chain-of-Custody forms were signed and dated by all <br /> personnel retaining custody of the samples (Appendix Q. <br /> Surface-Water Sampling <br /> The sampling protocols listed below were generally followed during surface water <br /> sampling 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 <br /> above for groundwater sampling were also adhered to for surface water sample <br /> 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 Ldtec GEM 2000(or equivalent)that <br /> was 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 <br /> the 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 <br /> clean, laboratory-prepared summa canisters. <br /> • For purging, the gas-sampling pump was attached with Teflon®tubing to a sample <br /> port located at the top of the monitoring probe. After purging at least one casing <br /> volume and fixed gases are recorded, a summa canister was attached to the Teflon® <br /> tubing to the sample port and a sample was collected by releasing the vacuum on the <br /> summa canister. <br /> • Chain-of-Custody procedures described above for groundwater samples were also <br /> adhered to for both the soil-pore gas and landfill gas samples, and the analytical <br /> 3 Geo-Logic Associates <br />