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EXHIBIT A � <br /> i <br /> BROWN AND CALDWELL FIELD PROCEDURES <br /> FOR <br /> SAMPLING FROM STOCKPILES AND SAMPLE HANDLING <br /> I <br /> Sampling from Stockpiles. Soil samples from stockpiles are composites. The composite <br /> sample consists of about three, and not more than four, individual soil samples of <br /> approximately equal volume. The individual soil samples will be collected using a <br /> decontaminated stainless steel trowel or an impact sampler. The soils will be packed into j <br /> a 2-inch by 6-inch brass tube, and the ends of the tube will be covered with aluminum foil <br /> and plastic end caps. The end caps will be taped in place with duct or plastic electrical <br /> tape. The individual soil samples comprising the composite soil sample will be <br /> homogenized at the analytical laboratory. <br /> All samples will be labeled and handled as described in the Brown and Caldwell operating <br /> procedure entitled Sample Handling. <br /> Sample Handling. Samples are handled during collection and shipment in such a way as <br /> to ensure maximum sample quality and integrity. All samples will be collected by <br /> experienced Brown and Caldwell field personnel. The samples will be collected in <br /> containers that are appropriate to the sample material and the required analyses. All <br /> containers will have been precleaned by the analytical laboratory, the container <br /> manufacturer, or will be cleaned in the field by washing in laboratory-grade detergent, <br /> rinsing with tap water, and then rinsing with deionized water. All sampling equipment <br /> will be cleaned in the same manor in which the sample containers are cleaned. <br /> Each sample container will have a label affixed in the field that identifies the date and <br /> time of sample collection, name of sampler, job number, and a unique sample number. <br /> This information will be recorded on the boring log or in the field records. Samples are <br /> stored and shipped to the laboratory in a cooled chest. Only analytical laboratories <br /> certified by the California Department of Health Services will be used. <br /> A chain-of-custody form will be used to record possession of samples from the time of <br /> collection to the time of arrival at the laboratory. The sample-control officer at the <br /> laboratory will verify sample integrity and confirm that they were collected in the proper <br /> containers, preserved correctly, and that there is an adequate volume for analysis. If these <br /> conditions are met, the samples will be assigned a unique log number for identification <br /> throughout analysis and reporting. The log number will be recorded on the chain-of- <br /> custody form and in the log book maintained at the analytical laboratory. The sample <br /> description, date received, client's name, and other relevant information will also be <br /> recorded. <br /> 2697qtE: RT3%2697-0t WP <br /> t J <br />