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'I <br /> 1 <br /> • <br /> pertinent field observations, is recorded in the field records A California-certified laboratory <br /> analyzes samples <br />' A chain of custody form is used to record possession of the sample from time of collection to its <br /> arrival at the laboratory When the samples are shipped, the person in custody of them <br />' relinquishes the samples by signing the chain of custody form and noting the time The sample <br /> control officer at the laboratory verifies sample integrity and confirms that the samples are <br /> collected in the proper containers, preserved correctly, and contain adequate volumes for <br /> ianalysis <br /> If these conditions are met, each sample'is assigned a unique log number for identification <br />' throughout analysis and reporting The log number is recorded on the chain of custody form <br /> and in the legally required logbook maintained by the laboratory in the laboratory The sample <br /> description, date received, client's name, and other relevant information is also recorded <br />