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kTJ KLEINFELDER <br /> I <br /> B-2.3 Collection of Soil Samples <br /> Soil samples are collected approximately every 5 feet for field screening and logging. Samples are <br /> collected by advancing the boring to a point immediately above the desired sampling depth and <br /> then driving (vertical borings) or pushing (slant borings) a Modified California Sampler, lined with <br /> three brass tubes, into the undisturbed soil. The sampler is then removed from the bottom of the <br /> boring. The ends of the bottom (third) tube are covered with Teflon and sealed with tight fitting <br /> plastic caps. <br /> Each sample is individually labeled. The label includes Kleinfelder's name, job number, the date <br /> and time the sample was collected, the employee number of the individual who performed the <br /> sampling, and a unique five-digit sample identification number. A custody seal may be placed on <br /> the sample in such a way that any attempt to tamper with the sample is easily visible. <br /> B-2.4 Sample Handling <br /> After labeling, the sample is immediately stored in an iced cooler for transport to Kleinfelder's <br /> office sample control or to the analytical laboratory. A Kleinfelder chain-of-custody form <br /> accompanies the cooler. The chain-of-custody form includes Kleinfelder's name, address, and <br /> telephone number, the employee number of the individual who performed the sampling, the sample <br /> numbers, the date and time the samples were collected, the number of containers each sample <br /> occupies, and the analyses for which the samples are being submitted, if any. When the samples <br /> are delivered, the chain-of-custody form is signed by each person who handles the samples, <br /> including all Kleinfelder employees and the receiving employee of office sample control or the <br /> analytical laboratory. <br /> B-2.5 Decontamination of Equipment <br /> To reduce the potential for cross-contamination, augers and associated equipment are steam cleaned <br /> prior to drilling each boring. In addition, sampling equipment is cleaned with a trisodium- <br /> phosphate or laboratory detergent wash and rinsed with distilled water prior to collecting each soil <br /> sample. <br /> B-2.6 Soil Cutting Disposal <br /> Drill cuttings are placed in 55-gallon drums or on top of and covered by polyvisquene for storage. <br /> The soil is left on site for disposal by the site owner. If requested, Kleinfelder can coordinate <br /> disposal of soil and water after analytical results are available. <br /> 20-YP8-262/2018P285r/2018C595 Page B-2 <br /> Copyright 1998, Kleinfelder, inc. November 4, 1998 <br />