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Sample Retention and Analysis Procedures <br /> Chain-of-custody procedures, including the use of chain-of-custody forms, were <br /> used to document sample handling and transport from collection to delivery to the <br /> laboratory for analysis <br /> The samples were placed on ice in an insulated chests overnight in the custody of a <br /> Shaw employee The samples were picked up within approximately 48 hours of <br /> collection by a couner supplied by the laboratory, or were delivered to the <br /> laboratory by Shaw personnel within approximately 48 hours of collection The <br /> samples were transported to the laboratory in a motor vehicle <br /> • Soil samples were labeled with the boring number, and the sample collection depth <br />' For example, "CPT-4-25"represents CPT boring 4 collected at a depth of 25 feet <br /> BGS <br /> • Laboratory quality assurance/quality control procedures are summarized below <br /> Method Blank Frequency = one per 16 samples <br />' — Matrix Spike/Matnx Spike Duplicate =one per 16 samples <br /> — Laboratory Control Sample/Laboratory Control Sample Duplicate= one per <br /> 16 samples <br /> 1 <br /> i <br />' NisecDP12003ip818W80040 IA3aa doc <br /> 1WO103 <br />