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' KLEINFELDER A-2.4 Preparation of Samples ' Each sample will be individually labeled. The label includes Kleinfelder's name,job number, the date and time the sample was collected, the employee number of the individual who performed the sampling, and a unique five-digit sample identification number. ' A-2.5 Sample Handling After labeling, the sample is immediately stored in an iced cooler for transport to Kleinfelder's office sample control or to the analytical laboratory. A Kleinfelder chain-of-custody form accompanies the cooler. The chain-of-custody form includes Kleinfelder's name, address and telephone number, the employee number of the individual who performed the sampling, the ' sample numbers, the date and time the samples were collected, the number of containers each sample occupies, and the analyses for which the samples are being submitted, if any. The chain- of-custody form is signed by each person who handles the samples, including all Kleinfelder employees and the receiving employee of office sample control or the analytical laboratory when ' the samples are delivered. A-2.6 Decontamination of Equipment ' To reduce the potential for cross-contamination, Geoprobe pipe and associated equipment are steam cleaned prior to advancing each boring. In addition, sampling equipment is cleaned with a trisodium-phosphate wash and rinsed with distilled water prior to collecting each soil sample. A-2.7 Soil Cutting Disposal ' It is not anticipated that soil cuttings will be generated requiring disposal during the Geoprobe investigation. A-2.8 Geoprobe Closure Upon completion of Geoprobe sampling, the borings will be closed by backfilling the borings ' with a neat cement grout, or bentonite powder. 1 1 1 1 23-485060-1\.SAC2R335 A-2 July 30,2002 Copyright 2002 Kleinfelder,Inc.