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PRELHXNARY HYDROGEOLOGIC ASSESSMENT REPORT 5491 IF Street,Banta,California Delta Project No.40-"l Page 15 6.5 General Sample Collection and Handling Procedums Proper collection and handling are essential to ensure the quality of a sample. Each sample will be collected in a suitable container,preserved correctly for the intended analyses,and stored prior to analysis for no longer than the maximum allowable holding time. Details on the procedures for collection and handling of soil and ground water samples used on this project can be found in Section I.G. 6.6 Sample Identification and Chain-of-Custody Procedures Sample identification and chain-of-custody procedures ensure sample integrity and document sample possession from the time of collection to its ultimate disposal. Each sample container submitted for _. analysis will have a label affixed to identify the job number,sampler,date and time of sample collection, and a sample number unique to that sample.. This information,in addition to a description of the sample, w field measurements made,sampling methodology,names of on-site personnel,and any other pertinent field observations will be recorded on the borehole log or in the field records. All samples will be analyzed - by a California Slate-certified laboratory. A chain-of-custody form will be used to record possession of the sample from time of collection to its arrival at the laboratory. When'the samples are.shippad,the person in custody ofthem relinquishes-the samples by signing the chant-of-custody forth and noting the time of shipment. Ile sample-control officer . at the laboratory verifies sample integrity and confirms that it was collected in the proper container, < preserved correctly, and that there is an adequate volume for analysis. l` If these conditions are met, the sample will be assigned a unique log number for identification through- I'" out analysis and reporting. The Iog number will be recorded on the chain-of-custody form and in the legally required log book maintained by the laboratory. The sample description, date received, client's •. name, and any other relevant information will also be recorded. 6.