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. SECOR INTERNATIONAL INCORPORATED <br /> STANDARD PROCEDURE FOR SOIL SAMPLING <br /> SPLIT SPOON SAMPLING <br /> Thep recleaned split spoon sampler lined with three 6-inch long brass or stainless steel tubes is <br /> p <br /> driven 18 inches into the underlying soils at the desired sample depth interval The sampler is <br /> driven by repeatedly dropping a 140-pound hammer a free fall distance of 30 inches The <br /> number of blows (blow count) to advance the sampler for each six-inch drive length are <br /> recorded on the field logs Once the sampler is driven the full 18-inch drive length or the <br /> sampler has met refusal (typically 50 blows per six inches), the sampler is retrieved <br /> Of the three sample tubes, the bottom sample is generally selected for laboratory analysis The <br /> sample is carefully packaged for chemical analysis by capping each end of the sample with a <br /> Teflon sheet followed by a tight-fitting plastic cap and sealing the cap with non-VOC, self- <br /> adhering silicon tape A label is affixed to the sample indicating the sample identification <br /> number, borehole number, sampling depth, sample collection date and time, the sampler's <br /> name, and fob number The sample is then annotated on a chain-of-custody form, and placed <br /> in an ice-filled cooler for transport to the laboratory <br /> The remaining soil samples are used for soil classification and field evaluation of headspace <br /> volatile organic vapors, where applicable, using a photoionization or flame ionization detector <br /> calibrated to a calibration gas (typically isobutylene or hexane) VOC vapor concentrations are <br /> 1• recorded on the boring logs A physical description of the encountered soil characteristics (i e <br /> moisture content, consistency, odor, color) and soil type as a function of depth are indicated on <br /> the boring logs In addition, the sample recovery and sampler penetration are noted on the <br /> boring logs The sampled soils are classified in accordance with the USCS <br /> Related Procedures <br /> O Standard Procedure for Equipment Decontamination <br /> 0 Standard Procedure for Hollow Stem Auger Dnlling <br /> • <br />