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place of collection and date and time of collection. All samples will be refrigerated using wet ice at 4°C (+/-2°C) and delivered to the analytical laboratory within 48 hours of collection. All samples will be delivered to the laboratory by commercial courier or CRA personnel. All samples will be maintained at 4°C (+/-2°C)by the laboratory. The Chain of Custody record,completed at the time of sampling,will contain,but not be limited to, the sample number, date and time of sampling, and the name of the sampler. The chain of custody document will be signed, timed, and dated by the sampler when transferring the samples. Each sample cooler being shipped to the laboratory will contain a Chain of Custody form. The Chain of Custody form will consist of four copies which will be distributed to the shipper, the receiving laboratory, and two copies to CRA. The shipper will maintain one copy while the other three copies will be enclosed in a waterproof envelope within the cooler with the samples. The sample ID of each sample shipped will be recorded on the sheet. The cooler will then be sealed properly for shipment. The laboratory, upon receiving the samples, will complete the three remaining copies. The laboratory will maintain one copy for their records. One copy will be returned to CRA upon receipt of the samples by the laboratory. One copy will be returned to CRA with the data deliverables package. Upon receipt of the cooler at the laboratory, the shipping cooler will be inspected by the designated sample custodian. The condition of the cooler will be noted on the Chain of Custody record sheet by the sample custodian. If the shipping cooler seal is intact, the sample containers will be accepted for analyses. The sample custodian will document the date and time of receipt of the container, and sign the form. The sample custodian will also record the temperature of one sample (or temperature blank) from each cooler and the temperature will be noted on the Chain of Custody. If damage or discrepancies are noticed (including sample temperature exceedances), they will be recorded in the remarks column of the record sheet, dated and signed. Any damage or discrepancies will be reported to the lab supervisor who will inform the laboratory project manager and laboratory QA Office (QAO) before samples are processed. The QAO shall be notified immediately about any discrepancies noted. 6.3 SAMPLE DOCUMENTATION IN THE LABORATORY Each sample or group of samples shipped to the laboratory for analysis will be given a unique identification number. The laboratory Sample Custodian will record the client 031090-10(4) -9- CONESTOGA-ROVERS&ASSOCIATES