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- _ _ <br /> MI <br /> PRELIMINARY HYDROGEOLOGISf ASSFSSMEW REPORT <br /> 148W West Frontage Road <br /> Manteca,California <br /> Delta Project No.40-88.479 <br /> Page 14 <br /> A label was placed on each sample. This label contained the well number, time and date of sampling, <br /> and any special instructions. Appropriate chain-of-custody forms were completed and placed with the <br /> samples which were chilled and prepared for delivery. <br /> 6.6 Sample Identification and Chain-of-Custody Procedures <br /> Sample identification and chain-of-custody procedures provide sample integrity and document sample <br /> _Y possession from the time of collection to its ultimate disposal. Each sample container submitted for <br /> analysis had a label affixed to identify the job number,sampler,date and time of sample collection,and <br /> r: the sample number unique to that sample. This information, in addition to a description of the sample <br /> location,field measurements made,sampling method,names of on-site personnel,and any other pertinent <br /> field observations was recorded on the log or the field records. <br /> A chain-of-cwtody form was used to record the possession of a sample from time of collection to its <br /> arrival at the laboratory. When the samples were shipped,the person in custody of them relinquished the <br /> samples by signing the chain-of-ct:stody form and noting the time. The sample- control officer at tht, <br /> - laboratory verified sample integrity and confirmed that it was collected in the proper container,preserved <br /> correctly, and that there was an adequate volume for analysis. <br /> If these conditions are met, the sample is assigned a unique log number for identification throughout <br /> analysis and reporting. The log number is recorded o: the chain-of-custody form and in the legally <br /> "N required log book maintained by the laboratory. The sample description,date received,client's name,and <br /> any other relevant information is recorded. <br /> 6.7 Water Le-Tel ,',Geasurements <br /> ti Water level measurements made in September and October with an electrically-operated water4evel <br /> indicator and recorded to the nearest 0.01 foot are reported in Table 4. <br />