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EXHIBIT C <br /> BROWN AND CALDWELL FIELD PROCEDURES <br /> Exhibit C describes Brown and Caldwell field procedures for sampling from stockpiles and <br /> excavations, and sample handling. <br /> SAMPLING FROM STOCKPILES AND EXCAVATIONS <br /> Soil samples from stockpiles are composites. For excavated soil to be disposed of an appropriate <br /> landfill, soil samples will be collected at a rate of one composite sample for every 100 cubic yards <br /> of soil. The composite sample consists of four, individual soil samples of approximately equal <br /> volume. For excavated soil to be used as backfill, soil samples will be collected at a rate of one <br /> sample for every 25 cubic yards of soil. <br /> The individual soil samples will be collected using a decontaminated stainless steel trowel or an <br /> impact sampler. The soils will be packed into a 2-inch by 6-inch brass tube,and the ends of the <br /> tube will be covered with aluminum foil and plastic end caps. The end caps will be taped in <br /> place with duct or plastic electrical tape. The individual soil samples comprising the composite <br /> soil sample will be homogenized at the analytical laboratory. <br /> Soil samples from excavations will be collected using a decontaminated stainless steel trowel or <br /> an impact sampler. They will be packed individually into 2-inch by 6-inch brass tubes. The <br /> ends of the tubes will be covered with aluminum foil and plastic end caps, and the end caps will <br /> be taped in place with duct or plastic electrical tape. For deep excavations that are not safe to <br /> enter,the soil samples will be collected from the bucket of a backhoe or other excavating <br /> machinery, which has scraped soil from the excavation wall or floor, as directed by the on-site <br /> geologist. <br /> All samples will be labeled and handled as described in the Brown and Caldwell operating <br /> procedure entitled Sample Handling. <br /> SAMPLE HANDLING <br /> Samples are handled during collection and shipment in such a way as to ensure maximum <br /> sample quality and integrity. All samples will be collected by experienced Brown and Caldwell <br /> field personnel. The samples will be collected in containers that are appropriate to the sample <br /> material and the required analyses. All sample containers are precleaned by the analytical <br /> laboratory or the container manufacturer or are decontaminated in the field by washing with <br /> Use or disclosure of data continued on this sheet is subject to the restriction specified at the beginning of this document. <br /> BCSACOI\P:\16000\16271\WRKPLN3.doc <br />