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1 <br /> File No 20-1008-52 A03 <br /> June 27, 1994 <br />' protection for the affected crew members This requirement is included in the complete field <br /> health and safety plan developed for the project prior to the start of field work <br /> 1 A-2.3 Collection of Soil Samples <br /> Soil samples are collected approximately every 5 feet for field screening and logging <br /> Samples are collected by advancing the boring to a point immediately above the desired <br /> sampling depth and then driving (vertical borings) or pushing (slant borings) a Modified <br />' California Sampler, lined with three brass tubes, into the undisturbed soil The sampler is <br /> then removed from the bottom of the boring The ends of the bottom (third) tube are covered <br /> with Teflon and sealed with tight fitting plastic caps <br /> Each sample as individually labeled The label includes Klemfelder's name, lob number, the <br /> date and tune the sample was collected, the employee number of the individual who <br /> performed the sampling, and a unique five-digit sample identification number A custody seal <br /> may be placed on the sample in such a way that any attempt to tamper with the sample is <br /> easily visible <br />' A-2.4 Sample Handling <br />' After labeling, the sample is immediately stored in an iced cooler for transport to <br /> Klemfelder's office sample control or to the analytical laboratory A Klernfelder <br />' cham-of-custody foram accompanies the cooler The chars-of-custody form includes <br /> Kleuifelder's name, address and telephone number, the employee number of the individual <br /> who performed the sampling, the sample numbers, the date and time the samples were <br />' collected, the number of containers each sample occupies, and the analyses for which the <br /> samples are being submitted, if any The cham-of-custody form is signed by each person <br /> who handles the samples, including all Kleunfelder employees and the receiving employee of <br />' office sample control or the analytical laboratory when the samples are delivered <br /> A-2.5 Decontamination of Equipment <br />' To reduce the potential for cross-contamination, augers and associated equipment are steam <br /> cleaned prior to drilling each boring In addition, sampling equipment is cleaned with a <br /> trisodium-phosphate wash and rinsed with distilled water prior to collecting each soil sample <br /> ETH and 10/94 <br />' Copyright 1994 Kleinfelder, Inc Page 2 of <br />