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J. H. KLEINFELDER & ASSOCIATES <br /> SAMPLE COLLECTION PROCEDURES <br /> A truck mounted drill rig using six—inch hollow—stem augers will be <br /> utilized to drill the soil borings. To minimize sample contamination, all <br /> augers and associated equipment will be steam—cleaned prior to the <br /> drilling of each boring. Any equipment used for sample collection will be <br /> cleaned with trisodium phosphate and rinsed with distilled water. All <br /> drilling will be performed under the supervision of a Kleinfelder <br /> k geologist who will log each boring as it is drilled. <br /> k <br /> Soil- samples will be collected by advancing the boring to a point <br /> immediately above the sampling depth and then driving a Modified <br /> California Sampler lined with three brass tubes into the soil. The <br /> sampler will be removed from the bottom of the boring and the bottom tube <br /> sealed with aluminum foil and caps. The samples will be immediately <br /> stored in an iced cooler. All samples collected will be handled under <br /> chain—of—custody control for sample integrity. <br /> The borings will be backfilled with cement grout and the drill cuttings <br /> will be stored; in 55—gallon drums. Arrangements must be made for the <br /> drill cuttings ito be disposed of by the client or property owner, or held <br /> for subsequent disposition. <br /> CLIENT REQUIREMENTS <br /> 4 <br /> To perform this investigation, we require the following <br /> o Location of all underground utilities and other subsurface <br /> structures which could interfere with drilling operations or be <br /> damaged!: during drilling. Failure to locate such lines or <br /> structures and responsibility for any necessary corrective <br /> actions, or resulting damage will not be the responsibility of <br /> J.H. Kleinfelder & Associates. Contact will be made with <br /> Underground Services Alert to notify public utility companies of <br /> our proposed operations. <br /> o Power :and water to operate a steam cleaner and an area on-site <br /> where our hollow—stem augers can be steam cleaned. Steam <br /> cleaning of the augers between borings is necessary to preclude <br /> f <br /> cross—contamination and sample bias. <br /> Y <br /> o Disposition of drill cuttings. <br /> o Adequate access and working space. <br /> f <br /> 3 <br />