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' File No 20-1008-52.A03 <br /> June 27, 1994 <br /> i <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 /> 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 in mediately 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) gibe are covered <br /> with Teflon and sealed with tight fitting plastic caps <br /> Each sample is individually labeled The label includes Klemfelder's name, job number, the <br /> date and time 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 HandUng <br />' After labeling, the sample is unmediately stored in an iced cooler for transport to <br /> Klemfelder's office sample control or to the analytical laboratory A Klemfelder <br /> chain-of-custody form accompanies the cooler The chain-of-custody form includes <br /> Klemfelder'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 chain-of-custody form is signed by each person <br /> who handles the samples, including all Klemfelder 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 /> tnsodium-phosphate wash and rinsed with distilled water prior to collecting each soil sample <br /> 10194 <br /> Copynght 1994 Klewfelder Inc Page 2 of <br />