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• confirms that the samples are collected in the proper containers, preserved correctly, and <br /> contain adequate volumes for analysis <br /> If these conditions are met, each sample is assigned a unique log number for <br /> identification throughout analysis and reporting The log number is recorded on the <br /> chain-of-custody form and in the legally-required log book maintained by the laboratory <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 deiomzed water After being rinsed, sample bottles <br /> will be dried overnight at a temperature cf 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 1- <br /> percent nitric acid solution Next, the bottles and caps will be triple rinsed with deiomzed <br /> water Finally, the bottles and caps will be air dried before being used at the site Plastic <br /> bottles and caps will be constructed of linear polyethylene or polypropylene Sampling <br /> 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 deiomzed 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 dcionized water before the next well is purged or <br /> sampled <br /> Internal Quality Assurance Checks <br /> Internal quality assurance procedures are designed to provide a the reliability of <br /> monitoring and measurement of data Both field and laboratory quality assurance checks <br /> are necessary to evaluate the reliability of sampling and analysis results Internal quality <br /> assurance procedures generally include <br /> -Laboratory Quality Assurance <br /> • Documentation of instrument performance checks <br /> • Documentation of instrument calibration <br /> + Documentation of the traceability of instrument standards, samples, and data <br />