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verify sample integrity and confirm that they were collected in the proper containers, preserved <br /> correctly, and that there is an adequate volume for analysis. If these conditions are met, the samples <br /> will be assigned a unique log number for identification throughout analysis and reporting. The log <br /> number will be recorded on the chain-of-custody form and in the bound log book maintained at the <br /> laboratory. The sample description, date received, client's name, and other relevant information will <br /> also be recorded. <br /> Quality Assurance/Quality Control <br /> Proper collection and handling are essential to ensure the quality of samples. Proper <br /> documentation of sample collection and handling procedures is essential to verify the integrity of the <br /> data. <br /> Quality assurance. All samples will be collected by experienced Brown and Caldwell field <br /> personnel, and placed in containers appropriate to the required analysis. Brass tubes used to collect <br /> soil samples will be cleaned by washing in laboratory-grade detergent, rinsing with tap water, and <br /> rinsing again with deionized water. All glass containers will have been precleaned by the <br /> manufacturer or at the analytical laboratory according to guidelines established by the U.S. <br /> Environmental Protection Agency. <br /> Following collection and inspection of soil samples, the ends of the brass tubes will be <br /> covered with aluminum foil, or teflon sheeting, and plastic caps and sealed with plastic tape. <br /> Groundwater samples will be collected in sampling bottles that have caps lined with Teflon septa. <br /> After filling, the bottles will be visually inspected to ensure that the sample is free from debris and <br /> that no air bubbles remain within the sampling bottles used for analysis of volatile organic <br /> compounds. All samples will be labeled and then placed in zip-lock plastic bags. Samples will be <br /> stored and transported in a closed ice chest and protected from meltwater. Samples will be stored <br /> for analysis no longer than the maximum allowable holding time. <br /> Sample identification and chain-of-custody procedures ensure sample integrity and <br /> document sample possession from the time of collection to ultimate disposal. Each sample <br /> container submitted for analysis will have a label affixed to identify the project number, sampler, <br /> date of collection, sample location, the monitoring-well number (if appropriate), and a number <br /> unique to that sample. That information will be recorded on the borehole log or in the field records, <br /> along with a description of the sample, field measurements, sampling methodology, names of <br /> sampling personnel, and other pertinent field observations. <br /> A standard Brown and Caldwell chain-of-custody form will be used to document possession <br /> of samples from time of collection to arrival at the laboratory. All samples will be submitted to an <br /> analytical laboratory that has been certified by the California Department of Health Services. The <br /> sample-control officer at the laboratory will verify sample integrity and confirm that samples were <br /> collected in the proper container, preserved correctly, and that there is an adequate volume for <br /> E:\2092\pha ffiworkplmdo <br />