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analysis has a label affixed to identify the fob number, sampler, date and time of sample <br /> • collection, and a sample number unique to that sample This information, in addition to a <br /> description of the sample, field measurements made, sampling methodology, names of <br /> on site personnel, and any other pertinent field observations, is recorded in the field <br />' records A Califomia-certified laboratory analyzes samples <br /> A chain of custody form is used to record possession of the sample from time of <br /> collection to its arrival at the laboratory When the samples are shipped, the person in <br />' custody of them relinquishes the samples by signing the chain of custody form and <br /> noting the time The sample control officer at the laboratory verifies sample integrity and <br />' confirms that the samples are collected in the proper containers, preserved correctly, <br /> and 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 logbook maintained by the laboratory in <br /> the laboratory The sample description, date received, client's name, and other relevant <br />'• information is also recorded <br />