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Site Investigation Work Plan Data Acquisition Carousel Cleaners, Sacramento, California and QA/QC Samples must always be accompanied by chain-of-custody paperwork.When transferring the possession of samples,the individual(s)relinquishing and receiving will sign,date, and note the time in the appropriate space on the custody paperwork. If the transfer occurs among the sampling team,the individual receiving the samples must document the range of sample numbers transferred to their possession in the"Received By"field. This act will document the physical transfer of the sample or group of samples from the sampler to other field personnel. When shipping samples via overnight courier,the individual in possession of the samples will relinquish the samples by signing, dating, and noting the time and completing the"Received By"box with the courier name and air bill number. All shipments will be accompanied by the appropriate custody and analyses specification document(s), identifying the shipment container's contents and analyses needed for each sample. The original chain-of- custody form will be stored with the project files; copies of the document will be sealed in a plastic bag and placed in the ice chest along with the samples. If sent by common carrier or air freight,the air bill will be maintained. The method of shipment, courier name(s), and other pertinent information will be entered on the chain-of-custody form. The following information will be conveyed to the scheduled laboratory when samples are shipped: • date shipped, • number of samples by concentration(high,medium, low), if known, and sample matrix, and • carrier and air bill number. Field personnel will notify the laboratory representative of Saturday sample deliveries, if necessary. 5.8 Data Quality Management 5.8.1 Data Handling Systems The following sections describe the process for handling data in terms of data generation,review, and routing for field sampling data. The procedures identified in previous sections describe the recording of measurements on data collection forms. This section discusses the monitoring and controls established to track field data through field form completion,review, and correction. Field Form Completion Data collection procedures and field documentation will be recorded on field forms and the project field notebook. Examples of the field forms are provided in Appendix B. Field Review and Correction After completion of field data and analytical sampling paperwork, substantial efforts will be made to ensure that the recorded information is accurate, complete, and legible. Data review and correction protocols have been established for both field- and office-specific data collection and processing. Technical personnel will document and review their own work and be accountable for its correctness. The intent of the review is to ensure that all forms are completed, are legible, and possess the required data elements. 5-7