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Appendix B <br /> in the laboratory The sample description, date received, client's name, and other relevant <br /> information is also recorded <br /> Equipment Cleaning <br /> Sample bottles, caps, and septa used in sampling for volatile and semivolatile organics <br /> will be triple rinsed with high-purity deionized water After being rinsed, sample bottles <br /> will be dried overnight at a temperature of 200°C Sample caps and septa will be dried <br /> overnight at a temperature of 60°C Sample bottles, caps, and septa will be protected <br /> from solvent contact between drying and actual use at the sampling site Sampling <br /> containers will be used only once and discarded after analysis is complete <br /> Plastic bottles and caps used in sampling for metals will be soaked overnight in a <br /> 1-percent nitric acid solution Next, the bottles and caps will be triple rinsed with <br /> deionized water Finally, the bottles and caps will be air dried before being used at the <br /> site Plastic bottles and caps will be constructed of linear polyethylene or polypropylene <br /> Sampling containers will be used only once and discarded after analysis is complete <br /> Before the sampling event is started, equipment that will be placed in the well or will <br /> come in contact with groundwater will be disassembled and cleaned thoroughly with <br /> detergent water, and then steam cleaned with deionized water Any parts that may absorb <br /> contaminants, such as plastic pump valves, etc will be cleaned as described above or <br /> replaced <br /> During field sampling, equipment surfaces that are placed in the well or contact <br /> groundwater will be steam cleaned with deionized water before the next well is purged or <br /> sampled <br /> B-4 <br />